ssued by the Hubrecht Laboratory onbehalfoftbe J^/'^.J General Em bry ological Information Service Foundation / •'•. Uppsalalaan 1, Univ. centrum ,.De Uitliof Utrecht — Netherlands CONTENTS a) Introduction p. 5 b) Directory of Names and Addresses, with subjects of research (alphabetical order) p. 7 c) Directory of Institutes, with members engaged in developmental biology (geographical order) p. 167 d) Subject Index (alphabetical order) p. 203 e) Communications from the Hubrecht Laboratory p. 263 f) Communications of the "Institut International d'Embryologie" . . p. 264 g) Book notices P- 268 INTRODUCTION In the twelfth issue the organization of the various chapters has undergone no change. In order to reduce the cost of printing as well as the size of the volumes, smaller type has been used for the Directory of Names and Addresses and for the Directory of Institutes. India and the U.S.S.R. show a considerable increase in the numbers of institutes listed. Contact was again established with Uruguay. Information concerning the Hubrecht Laboratory may be found on page 263. For information regarding the "International Institute of Embryology" (in- cluding the latest membership list), please see page 264. This section also gives details concerning the Vlth International Congress of Embryology (topic: "Nucleocytoplasmic interactions during differentiation") (Paris, 1 — 7 Sept. 1968). P. D. NIEUWKOOP J. FABER DIRECTORY OF NAMES AND ADDRESSES with Subjects of Research (alpbabrlical order) • = Members of the ..Institut International d'Embryologie" AARON. C. Dr. en Med. — Lab. d'Anat.. Fac. de Med.. 45 Rue des Sts.Peres, PARIS Vie, France a Developpement de la colonne vert^brale. Homo sapiens (Primates) • ABBOTT. Miss U. Ph.D.. Prof . — Dept. of Poultry Husbandry, Agric. Exper. Station, Coll. of Agric, Univ. of California, DAVIS, Calif. 95616, U.S.A. ABELOOS, M. Prof. — Lab. de Biol, gener. de la Fac. des Sci.. Place Victor Hugo, MAR- SEILLE, France • ABERCROMBIE, M. Prof. — Dept. of Zool. and Comp. Anat.. Univ. Coll. London, Cower St.. LONDON W.C.I, England a Study of cell relations in tissue culture. Galtus gallus (Aves), Mus musculus (Rodentia) (in collaboration with Mrs. J. E. M. HEAYSMAN (WAKELING) ) ABRAMOVICI. A. M.Sc. in Med. Sci. — Inst. d'Embryol. et Teratol. exper. du C.N.R.S., 49 bis Av. de la Belle Gabrielle, 94-NOGENT-sur-MARNE, France a Fat-soluble vitamins and their inhibitors causing abnormal development of the embryo. Gallus gallus (Aves) b Developmental physiology and physiopathology of extraembryonic fluids and plasma. Gallus gallus (Aves) ABRO, A. — Inst, of Anat., Univ. of Bergen, BERGEN, Aarstadvollen, Norway ABU-HANIFI, M. S. K. B.Sc. — Dept. of Zool., Government Coll., LAHORE, Pakistan ABU-SINNA, G. M. E. B.Sc. — Dept. of Zool., Fac. of Sci., Ain Shams Univ., Abassia, CAIRO, Egypt ACHTELIK, W. Mgr.biol. — Dept. of Gener. Biol., Silesian Acad, of Med., Rokitnica, ZABRZE 8, Poland ACKERMAN, G. A. M.D., Ph.D.. Prof. — Dept. of Anat., Ohio State Univ., 1645 Neil Ave.. COLUMBUS, Ohio 43210, U.S.A. a Morphology and histochemistry of the hemopoietic system in embryonic and adult con- dition. Gallus domesticus (Aves), Homo sapiens and other spp. (Mammalia) ACTON, A. B. D.Phil. — Dept. of Zool., Univ. of British Columbia, VANCOUVER 8. B.C., Canada a Electron microscope study of spermatogenesis in the SD mutant (with meiotic drive). Drosophila melanogaster (Diptera) h Electron miscroscope study of the development of wing muscles in flying and non-flying animals. Cenocorixa bifida (Hemipfera) ADACHI, H. M.Sc. — Lab. of Embryol.. Fac. of Sci., Osaka City Univ., Sugimoto - cho, Sumiyoshi-ku, OSAKA, Japan a Studies on the species-specific antigenicities of the cell membrane. Mus musculus (Roden- tia) b Immunological analysis of the structural molecules of the erythrocyte membrane. Mus musculus (Rodentia) ADAMS, C. E. Ph.D. — A.R.C. Unit of Reproductive Physiol, and Biochem., Univ. of Cambridge, 307 Huntingdon Rd., CAMBRIDGE, England a Development of ova (preimplantation stages) with special reference to the maternal environment using the egg transfer technique. Oryctolagus cuniculus (Lagomorpha) b Sperm transport and quantitative aspects of fertilization. Oryctolagus cuniculus (Lago- morpha) ADAMS, T. S. Ph.D. — Metabol. and Radiat. Res. Lab.. State Univ. Station. FARGO. N.D. 58103, U.S.A. a Oogenesis in normal and chemosterilized animals. Hippolates collusor (Chloropidae, Dip' fera) h Physiology and biochemistry of oogenesis. Musca domesfica (Diptera) ADAMS SMITH, W. N. M.B., Ch.B. — Dept. of Anat., Med. School, Univ. of Otago, DUNEDIN N.2, New Zealand ADAMSTONE, F. B. Ph.D.. Prof. (Emer.) —Dept. of Zool., Univ. of Illinois, 345 Nat. Hist. Build., URBANA, 111. 61801, U.S.A. • ADELMANN, H. B. Dr., Prof. (Emer.)— Div. of Biol. Sci.. Cornell Univ., Stimson Hall. ITHACA, N.Y. 14850, U.S.A. ADLER, R. M.D. — Inst, de Anat. Gen. y Embriol., Fac. de Med., Paraguay 2155, BUENOS AIRES, Argentina a Experimental neuroembryology. Gallus domesticus (Aves) h Neural tube development in organ culture. Gallus domesticus (Aues) c Electron microscopy of developing nervous system. Gallus domesticus (Avee) AESCHLIMANN, A. Dr.phil.II — Schweiz. Tropeninst., Socinstr. 57. BASEL, Schweiz a Spermatogenesc, Ovogenese, Embryonalentwicklung und Endocrinologie. (Ixodoidea, Acarina. Arachnoidea) (in collaboration with R. GEIGY) b Uebertragung von Spirochaetosen iiber das miitterliche Ovarium auf die Embryonen und damit auf die Nachkommen der nachsten Generation. (Argasidae, Acarina, Arachnoidea) (in collaboration with R. GEIGY) AFONYA, I. I. — Dept. of Anat.. Univ. of Ibadan, IBADAN, Nigeria a Enzyme histochemistry of the differentiating spinal cord. Gallus domesticus (Aves), Raftus norvegicus (Rodentia) • AFZELIUS, B. A. Fil.Dr. — Wenner-Gren's Inst, for exper. Biol.. Norrtullsgatan 16 STOCKHOLM Va., Sweden a Fine structure of germ cells. (Invertebrata; Verfebrata) AGARWAL, L. P. Prof. — Dr. Rajendra Prasad Centre for Ophthalmic Scis.. All India Inst, of Med. Scis., Ansari Nagar, NEW DELHI-16, India a Lens regeneration after intracapsular and extracapsular lens extraction, with and without implantation of embryonal ocular tissue. Macacus rhesus (Primates) (in collaboration with S. K. ANGRA) b Lens regeneration. Oryctolagus cuniculus (Lagomorpha) (in collaboration with S. K. AN- GRA) c Ocular embryonal tissue implants in the anterior chamber of the eye. Oryctolagus cuniculus (Lagomorpha) (in collaboration with S. K. ANGRA) d Biochemical assay of regenerates (amino acids and RNA. DNA). Oryctolagus cuniculus (Lagomorpha), Macacus rhesus (Primates) (in collaboration with S. K. ANGRA) AGERBAK, Miss G. S. B.Sc — A.R.C. Poultry Research Centre, King's Buildings, West Mains Rd.. EDINBURGH 9. Scotland. U.K. a Analysis of the action of inherited abnormalities and lethal genes in development. Gallus gallus (Aves) • AGRELL, I. P. S. Fil.Dr., Prof. — Zoophysiol. Inst.. Univ. of Lund. LUND. Sweden AITA, Miss M. Ph.D. — Inst, of Histol. and Gener. Embryol.. Univ.-Perolles. 1700 FRI- BOURG, Suisse a Teratogenetic action of 5-fluorouracil in o v o and in vitro. Gallus domesticus (Aves) AKESSON, B. Fil.dr. — Zootom. Dept.. Zool. Inst., Univ. of Lund, LUND. Sweden AKETA. K. D.Sc. — Biol. Inst., Fac. of Sci., Nagoya Univ.. Chikusa-ku. NAGOYA, Japan a Biochemistry of sperm-egg bonding. Hemicentrotus pulcherrimus (Echinoidea) b Protection mechanism against polyspermy. Oryzias latipes (Teleostei) AKHABADZE. L. V. Cand.biol.sci. — Inst, of Developm. Biol.. Acad, of Sci. of the U.S.S.R., Vavilov St. 26, MOSCOW V-133, U.S.S.R. a Regeneration of myocardium. Rattus norvegicus, Canis familiaris. Fells domestica, Orycto- lagus cuniculus (Mammalia) ALBANESE, Mrs. M. P. — 1st. di Zool. e di Anat. Comp.. Univ. di Messina. MESSINA. Italia ALBERT. J. Dr. en Biol.anim. — Lab. de Biol. anim.. Fac. des Sci. de Bordeaux. 351 Cours de la Liberation, 33-TALENCE, France a Morphogenese de I'appareil digestif. (Anura) h Developpement des glandes digestives. (Anura) c Ultrastructure des cellules du tube digestif chez I'embryon et la larve. (Anura) d Endoderme et derives. Rana dalmatina, Bufo bufo (Anura) ALBRIGHT. J. F. Ph.D. — Biol. Div., Oak Ridge Natl. Lab.. P.O.Box Y. OAK RIDGE, Tenn. 37831. U.S.A. a Ontogeny of the immune system. Gallus gallus (Aves), Mus musculus (Rodentia) (in collaboration with T. MAKINODAN) b Differentiation of erythrocytic system during ontogeny. Gallus gallus (Aves), Mus mus- culus (Rodentia) ALESCIO. T. M.D. — 1st. di Anat. Topogr. Univ. di Napoli. Via L. Armanni 5. NAPOLI, Italia a Development in vitro of embryonic organs. Mus musculus (Rodentia) b Effect of ionizing radiation on embryonic organs developing in vitro. (Mammalia) ALEXANDER, G. D.Agr.Sc. — Div. of Anim. Physiol., C.S.I.R.O.. Ian Clunies Ross Anim. Res. Lab.. Great Western Highway. (P.O.Box 144. Parramatta), PROSPECT. N.S.W., Australia a Investigations of the physical and physiological relations between maternal and embryooic tissues. Ovis spec. (Artiodactyla) ALEXANDRE, J.-H. — Lab. d'Anat., Fac. de Med., 45 Rue des Sts. Peres, PARIS Vie. France a Developpement du rein. Homo sapiens (Primates) ALLfiAUME (HORDES), Mrs. N. Dr.Biol.anim. — Lab. de Zool. exper.. Fac. des Sci. de Bordeaux, 40 Rue Lamartine, TALENCE (Gironde), France a Recherches experimentales sur la determination des caracteres larvaires et imaginaux. Calliphora spec. (Dipteca) ALLEN, E. R. — Dept. of Anat. and Cell Biol., Med. School, Univ. of Pittsburgh, PITTS- BURGH. Pa.l5213, U.S.A. a Fibrillogenesis of native collagen in the embryo. Sus scrofa (Artiodactyla) h Immunochemical studies of actin and myosin synthesis in somites. Gallus domesticus (Aues) c Morphological (ultrastructural) organization of contractile proteins in myogenic tissue into functional sarcomeres. Gallus domesticus (Aves), Sus scrofa (Artiodactyla) ALLEN, Miss M. J. Ph.D., Prof. — Dept. of Biol.. Wilson Coll.. CHAMBERSBURG. Pa.. U.S.A. • ALLEN R. D. Ph.D. — Dept. of Biol. Sci.. State Univ. of New York at Albany. ALBA- NY, N.Y. 12203, U.S.A. a Investigations of the motility of unicellular organisms and of tissue cells in vivo and in vitro. (Sarcodina, Protista; Metazoa) ALLISTON, C. W. Ph.D., Prof. — Herrick Labs., Dept. of Anim. Sci., School of Agric. Purdue Univ., LAFAYETTE, Ind. 47907, U.S.A. a In vitro culture temperatures and subsequent viability of ova. Oryctolagus cuniculus (Lagomorpha) ALVAREZ, L. Med.Dr. — Inst. F. Oloriz, Fac. of Med.. Univ. of Granada, GRANADA. Spain a Developmental anatomy of the fetus. Homo sapiens (Primates) b Congenital malformations of the heart. Gallus domesticus (Aves). Homo sapiens (Prima- tes) AMANO, H. D.Sc, Prof. — Biol. Lab., Doshisha Univ., Kamikyo-ku, Karasuma Imadegawa, KYOTO, Japan a Developmental mechanism of the heart. Triturus pyrrhogaster (Urodela) b Developmental mechanism of the limb. Triturus pyrrhogaster (Urodela) AMANUMA, A. Ph.D. — Lab. of Embryol., Fac. of Sci.. Osaka City Univ.. Sugimoto-cho. Sumiyoshi-ku, OSAKA, Japan a Experimental analysis of gonadal differentiation. Gallus domesticus (Aves) b Sex chromatin in embryonic tissues. Mus musculus (Rodentia) AMER, F. I. M.Sc. — Inst, of Anim. Genet., Univ. Dept. of Genet., King's Buildings, West Mains Rd., EDINBURGH 9, Scotland, U.K. AMONS, F. M.Sc. — Anat. Embryol. Inst., Univ. of Amsterdam, Mauritskade 61. AMSTER- DAM O., Netherlands a Development of pineal gland. Gallus domesticus (Aves) • AMOROSO. E. C. F.R.S., Prof. — Dept. of Physiol., Royal Veter. Coll. (Univ. of Lon- don), Royal College St., LONDON N.W.I, England AMPALATHINKEL, Miss B. B.Sc, Lic.rer.nat. — Zool. Inst., Naturw. Fak.. Univ. Freiburg, 1700 FREIBURG, Schweiz a Beitrage zur Morphologie und Embryogenese des Brustschulterapparates. Hemidactylus spec, Gehyra spec. (Geckonidae, Lacertilia) • AMPRINO, R. M. M.D., Prof. — Inst, of human Anat., Fac. of Med., Policlinico, BARI. Italy a Relations between ectoderm and mesoderm in the morphogenesis of the wing. Gallus domesticus (Aves) h Regulative capacities of the wing anlage. Gallus domesticus (Aves) c Analysis of the twinning of limb buds. Gallus domesticus (Aves) AMY. R. L. Ph.D., Prof. — Dept. of Biol., Southwestern at Memphis, MEMPHIS. Tenn. 38112, U.S.A. a Ultraviolet microbeam studies on the developing embryo. Habrobracon juglandis ( = Bracon hebetor) (Hymenoptera) b Analysis of radiation-induced embryonic death. Habrobracon juglandis ( = Bracon hebe tor) (Hymenoptera) ANAND KUMAR, T. C. Ph.D. — Dept. of Anat., Med. School, Univ. of Birmingham, Edgbaston, BIRMINGHAM 15, England a Oogenesis. ( Lemuroidea, Primates) ANDERSON, D. T. Ph.D. — School of Biol. Scis., Zool. Building, Univ. of Sydney, SYD- NEY, N.S.W., Australia a Embryology. Tetraclita rosea (Cirripedia, Crustacea) ANDERSON, J. M. Ph.D., Prof . — Div. of Biol. Sci., Cornell Univ.. ITHACA, N.Y. 14850, U.S.A. a Visceral regeneration and differentiation. Asterias forbesi (Asteriidae) ANDERSON, J. W. Ph.D. — Dept. of Anat., Bardeen Med. Labs., Univ. of Wisconsin, MADISON, Wis. 53706, U.S.A. a Comparative histophysiology of placentas and fetal membranes, especially protein transfer. Geomys bursarius, Ratfus norvegicus (Rodentia), Eptesicus fuscus, Noctilio labialis (Chi- roptera), Canis familiaris (Carnivora) b Development of brain proteins. c Postnatal protein transfer via mammary gland and gut. d Electrophoresis of fetal and maternal sera. Canis familiaris (Carnivora), Castor canadensis (Rodentia), Odocoileus virginiana (Artiodactyla) ANDERSON, P. N. M.D. — Lab. of Biol., Natl. Cane. Inst., Natl. Inst, of Health, BETHES- DA, Md. 20014, U.S.A. a Radioautographic analysis of DNA synthetic cycle during embryonic development of the ocular lens. Callus domesticus (Aves) h Immunochemical and histochemical analysis of plasma cell and immunoglobulin differen- tiation; in vitro induction of plasma cell immunoglobulin synthesis. Mus musculus (Rodentia) ANDERSSON, T. Fil.mag. — Zool. Inst., Univ. of Gothenburg, 4de Langgatan 7B, GOTE- BORG SV, Sweden a Studies on the ontogenesis of myelencephalic nuclei. (Repfilia), Callus domesticus (Aves) ANDO, S. D.Sc. — Research Inst, of Environm. Med., Nagoya Univ., Furo-cho, Chikusa-ku, NAGOYA, Japan • ANDRES, G. Dr. — Zool. Inst, der Johannes Gutenberg-Univ., Saarstr. 21. MAINZ. Deutsche Bundesrepublik ANDREW. Miss A. Ph.D. — Dept. of Anat., Med. School, Univ. of the Witwatersrand, Hospital St., JOHANNESBURG, S. Africa. a Origin of enteric ganglia. Callus domesticus (Aves) h Histochemical study of histones in the regenerating lens. Triturus viridescens (Urodela) (in collaboration with Mrs. V. GABIE. Dept. of Zool. ) c Autoradiographic study of the relation between histones and RNA synthesis (in cultured neural crest cells). Xenopus laevis (Anma) (in collaboration with Mrs. V. GABIE, Dept. of Zool.) ANGRA, S. K. M.S. — Dr. Rajendra Prasad Centre for Ophthalmic Scis., All India Inst, of Med. Scis., Ansari Nagar. NEW DELHM6, India a Lens regeneration after intracapsular and extracapsular lens extraction, with and without implantation of embryonal ocular tissue. Macacus rhesus (Primates) (in collaboration with L. P. AGARWAL) b Lens regeneration. Oryctolagus cuniculus (Lagomorpha) (in collaboration with L. P. AGARWAL) c Ocular embryonal tissue implants in the anterior chamber of the eye. Oryctolagus cuniculus (Lagomorpha) (in collaboration with L. P. AGARWAL) d Biochemical assay of regenerates (amino acids and RNA, DNA). Oryctolagus cuniculus (Lagomorpha), Macacus rhesus (Primates) (in collaboration with L. P. AGARWAL) ANTEUNIS, Miss A. H. J. D.Sc. — Lab. of Anat., Fac. of Med.. Univ. of Gent, Ledeganck- straat 35, GENT, Belgium a Substructural investigation of oogenesis and early development. Artemia salina (Anostraca. Crustacea) ANTON, H. J. Dr.phil., Doz. — Zool. Inst, der Univ., Weyertal 119, 5-KOLN-Lindenthal. Deutsche Bundesrepublik a Proteinstoffwechsel bei Regenerationsprozessen. (Amphibia) AOTO, T. D.Sc, Prof. — Dept. of Zool., Fac. of Sci., Hokkaido Univ., North 8, West 5. SAPPORO, Japan a Morphological and physiological studies on neurosecretion. (Crustacea: Pisces; Amphibia) b Sex differentiation and gonadal development. (Amphibia) APEKIN. V. S. — Azov - Black Sea Research Inst, of Marine Fishery Management and Oceanogr.. KERCH, Crimean region, U.S.S.R. a Immunological study of maturation processes in oocytes, and of early embryogenesis. Acipenser stellatus, A. giildenstadfi colchicus (Chondrostei) ARGYRIS (FRANKENHUIS). Mrs. B. Ph.D. — Dept. of Zool.. Syracuse Univ.. Ill Lyman Hall. SYRACUSE, N.Y. 13210. U.S.A. a Maturation of immunological capacity; comparative study. 1. Immunological tolerance. 2. Role of macrophages in antibody synthesis and immunological maturation. Mus musculus (Rodentia) ARGYRIS, Th. S. Ph.D.. Prof. — Dept. of Zool., Syracuse Univ., Ill Lyman Hall, SYRA- CUSE, N.Y. 13210, U.S.A. a Regeneration and the control of growth of adult organs. 1. Mechanism of hair growth stimulation in wound healing. 2. Mechanism of cellular proliferation produced by damage in adult liver and kidney. (Mammalia) h Functional hypertrophy and the control of growth of adult organs. 1. Mechanism of kidney growth following unilateral nephrectomy. 2. Role of plasma proteins in liver growth. (Mammalia) c Stimulation of adult organs and tissues by tumors; growth promoting effects of Ehrlich Ascites tumor, S-180, on skin, mammary gland, liver and kidney. (Mammalia) 10 d The relationship of enzyme induction to the control of organ growth. Rattus norvegicua. Miis musctiliis (Rodentia) • ARIENS KAPPERS, J. M.D., Prof. — The Netherlands Central Inst, for Brain Research, IJdijk 28, AMSTERDAM-O., Netherlands (no embryological work in progress) ARIMA, Sh. D.Agr., Prof. — Lab. of Anim. Morphol., Biol. Inst., Fac. of Sci., Nara Women's Univ., Kitauoya-Nishi-machi, NARA, Japan a Studies on the end-products of metabolism in the embryo and the tadpole. Rhacophorus schlegelii var. arborea (Anura) b Effects of mammalian prolactin on the growth and the nitrogenous excretion of tadpoles. Rhacophorus schlegelii var. arborea (Anura) ARMS, Miss K. Ph.D. — Dept. of Biol. Sci., Stanford Univ.. STANFORD, Calif. 94305, U.S.A. a Control of nucleic acid metabolism of isolated embryonic nuclei. Xenopus laevis (Anura) ARMSTRONG, P. B. M.D., Prof. — Dept. of Anat., School of Med., State Univ. of New York, 766 Irving Ave.. SYRACUSE, N.Y. 13210. U.S.A. a Function of the developing liver. Amiurus nebulosus (Teleostei) b Behavioral responses in developing embryos. Amiurus nebulosus (Teleostei), Ambysfoma punctatum (Urodela) ARMSTRONG. Mrs. R. C. Ph.D. — Dept. of Biol. Sci., Stanford Univ., STANFORD, Calif. 94305, U.S.A. a Developmental pathology and teratogenesis, with special reference to the effect of materna? vitamin deficiencies and the ocular system. Rattus norvegicus (Rodentia) b The relationship between cell replication and cytodifferentiation in embryonic lens cells as studied by tissue culture and autoradiographic methods. Mus musculus (Rodentia) ARNAULD, Miss E. L. Lic.es Sci. — Lab. de Biol, anim., Fac. des Sci. de Bordeaux, 351 Cours de la Liberation, 33-TALENCE, France a Etude experimental du developpement du mesonephros. Rana spec, Discoglossus spec, Bufo spec. (Anura) b Etude experimentale de la metamorphose du rein. Rana spec, Discoglossus spec, Buio spec. (Anura) ARNDT, E. A. Dr.rer.nat., Prof. — Zool. Inst, der Universitat, Abt. Meeresbiologie, Univer- sitatsplatz 2, ROSTOCK, Deutsche Demokratische Republik a Morphologie, Histochemie und Physiologie der Oogenese von Susswasserformen. (Tele- ostei) ARNOLD, J. M. Ph.D. — Pac. Biomedical Res. Center. 2538 The Mall, Univ. of Hawaii. HONOLULU, Hawaii 96822, U.S.A. a Studies on the egg cortex (histochemical techniques, electron microscopy and centrifuga- tion). Loligo pealii (Decapoda). Octopus spec. (Octopoda, Mollusca) h Studies on the developmental fine structure of the eye-lens. Loligo pealii (Decapoda), Octopus spec. (Octopoda, Mollusca) c Studies on the formation of the blastoderm and cleavage. (Cephalopoda, Mollusca) • ARORA, H. L. Ph.D. — Rockefeller Univ.. New York. N.Y. 10021. U.S.A. ARRU, Miss A. Dr. — 1st, di Biol, e Zool. gener., Univ. di Sassari, SASSARI, Sardegna, Italia a Gonadogenesis. Crenilabms spec, (Labridae), Syngnathus spec. (Syngnathiformes, Tele- ostei) ARTHUR, Miss E. M.Sc — School of Biol. Scis., Univ. of East Angha, Wilberforce Road, NORWICH, NOR 85C, England a Neoplasms, particularly lymphosarcomas. Xenopus laevis (Anura) h Nuclear-cytoplasmic interaction in early development. Xenopus laevis (Anura) ASAKURA, K. — Biol. Inst., Fac of Sci., Univ. of Kanazawa. Marunouchi-1, KANAZAWA, Japan ASAMI, K. M.S. — Div. of Biol., Nat. Inst, of Radiol. Scis, Anagawa 4-9, CHIBA, Japan a Biochemical research on the hormonal control of placental growth. Rattus norvegicus (Rodentia) ASAYAMA, S. D.Sc, Prof. — Lab. of Embryol., Fac. of Sci., Osaka City Univ., Sugimoto- cho, Sumiyoshi-ku, OSAKA, Japan a The effect of steroid hormones upon sex differentiation; experiments with the method of organ culture. Mus musculus (Rodentia) b Study on gonad differentiation. Homo sapiens (Primates) c Experimental analysis of gonadal sex. Callus domesticus (Aves) ASHBY. K. R. Ph.D. — Dept. of Zool, Univ. of Durham, South Road, DURHAM, Eng- land a The development of the reproductive system, and the modifications induced by treatment with steroid hormones during the course of sexual differentiation. Salmo trutta (Teleostei) ASHHURST, Miss D. E. Ph.D. — Dept. of Anat.. Med. School. Univ. of Birmingham, Edgbaston, BIRMINGHAM 15, England a Development of connective tissue in the pupa: site of polymerization of collagen molecules (using labelled proline). Galleria mellonella (Lepidoptera) 11 ASHLEY, G. T. M.D. — Dept. of Anat., Univ. of Manchester. MANCHESTER 13, England a Normal and abnormal development of thoracic and pelvic viscera. Various spp. (Ver- tebrafa) b Developmental cytology of the ovary. (Vertebrata) ASLING, C. W. M.D., Ph.D., Prof. — Dept. of Anat., School of Med., Univ. of California, SAN FRANCISCO, CaUf. 94122, U.S.A. a Development of face and palate, and congenital defects resulting from maternal pteroyl- glutamic acid deficiency. Raftus spec. (Rodentia) h Development of inner ear, and congenital defects resulting from maternal manganese deficiency. Rattus spec. (Rodentia) c Autoradiographic studies on abnormal development in the embryo, with special reference to the neural tube. Rattus spec. (Rodentia) ASSENMACHER, I. A. Dr.Med., Dr.Sci., Prof. — Lab. de Physiol, anim., Fac. des Sci.. Univ. de Montpellier, Place Eugene Bataillon, 34-MONTPELLIER, France a Developpement et physiologie de I'hypothalamus et de I'hypophyse. Anas spec. (Aves) ASTAHOVA (DJAKONOVA), Mrs. I. N. — Dept. of Embryol., Fac. of Biol., Moscow Univ.. MOSCOW V-234, U.S.S.R. • ASTAUROV, B. L. Dr.biol.sci., Prof. — Inst, of Developm. Biol., Acad, of Sci. of the U.S.S.R., Vavilov St. 26. MOSCOW V-133, U.S.S.R. a Artificial parthenogenesis and experimental polyploidy. Bombyx mod (Lepidoptera) h Induction of amphidiploidy in interspecific hybrids. Bombyx mod, B. mandadna (Lepidop- tera) (in collaboration with Miss V. N. VEREISKAYA) AUCLAIR, W. Ph.D., Prof . — Dept. of Biol., Rensselaer Polytechnic Inst., School of Sci.. TROY. N.Y. 12181. U.S.A. a Macromolecular protein synthesis and associated morphogenesis of cilia during the blastula stage. Arbacia punctulata. Strong ylocentrotus purpuratus (Echinoidea), Chaetop- terus pergamentaceus (Annelida) b Macromolecular synthesis during regeneration of cilia in gastrulae. Arbacia punctulata. Strong ylocentrotus purpuratus (Echinoidea) , Chaetopterus pergamentaceus (Annelida) AUERBACH. R. Ph.D. — Dept. of Zool.. Univ. of Wisconsin, Birge Hall, 1117 West John- son St., MADISON. Wis. 53706. U.S.A. AUERSPERG, N. M.D. — Dept. of Zool., Univ. of British Columbia. VANCOUVER 8. B.C., Canada a Interaction of cellular and environmental factors in tumor histogenesis in vitro. Homo sapiens (Primates) AUGSTEN, H. Dr.rer.nat.habil. Prof. — Inst, fur Botanik der Friedrich-Schiller-Univ. Jena. von-Hase-Weg 3. 69-JENA. Deutsche Demokr. Republik a The relationship between metabolism and development in forms with different physiological activity. Ficaria verna (Ranunculaceae), Triticum spec. (Gramineae) AUROUX. M. Dr.en Med. — Lab. d'Embryol.. Fac. de Med., 45 Rue des Sts Peres. PARIS Vie. France a Developpement normal et anormal de I'encephale. Mus rattus (Rodentia) • AUSTIN, C. R. D.Sc. — Physiol. Lab., Downing Street, CAMBRIDGE. England a Investigations on gametes, fertilization and early development. (Polychaeta; Mollu^ca; Echinodermata; Reptilia; Mammalia) b Induced and spontaneous anomalies of development. (Mammalia) c Karyotype studies on embryos developing after experimental treatments applied to gametes. (Mammalia) AVE, K. M.Sc. — Dept. of Biol., Embryol. Inst., Fac. of Sci., Kyushu Univ., Hakozaki, FUKUOKA, Japan a Active groups of effective proteins in primary induction. Triturus pyrrhogaster (Urodela) b Heterogeneous cell composition of germ layers. (Amphibia) • AVEL, M. Dr., Prof. — Lab. de Biol. Gener., Fac. des Sci. de Bordeaux, 40 Rue Lamartine, TALENCE (Gironde), France AVERKINA. Mrs. R. F. Cand.med.sci. — Inst, of Exper. Biol.. Acad, of Med. Sci. of the U.S.S.R., Baltiyskaya St. 8, MOSCOW A-315, U.S.S.R. a Comparative study of organ specific antigens in embryos and adults. Rana temporaria, R. ridibunda (Anura), Gallus domesticus (Aves), Homo sapiens (Primates) b Study of organ-specific antigens in early developmental stages. Rana temporaria, R. ridi- bunda (Anura) AVILA, L. — Inst, de Biol. Celular, Univ. Nac. de Cordoba, Casilla Postal 362. CORDOBA. Argentina AVRAMOVIC (CERMELJ), Mrs. N. B.Sc. — Inst, of Nucl. Sci. "Boris Kidrich", BEL- GRADE, Yugoslavia AX, P. Dr., Prof. — II. Zool. Inst, und Museum, Berlinerstr. 28, GOTTINGEN, Deutsche Bundesrepublik AXELROD, L R. Ph.D. — Div. of Biol. Growth and Development, Southwest Found, for Research and Education. P.O.Box 2296, SAN ANTONIO, Tex. 78206, U.S.A. a Steroid metabolism in the fetus. Homo sapiens, Papio spec. (Primates) 12 AYKAg, I. D.V.M. — Inst, of Histol. and Embryol., Med. Fac, Ataturk Univ., ERZURUM. Turkey a The embryonic development of plasma cells (morphology, histochemistry and ultra- structure). Raftus norvegicus (Rodentia) AZOUBEL, R. M.D., Ph.D. — Dept. de Morfol. Humana Funcional e Aplicada, Fac. de Med. de Ribeirao Preto, Univ. de Sao Paulo, Caixa Postal 301. SAO PAULO, S.P., Brasil a Histochemistry of developing neurons. (Vcrtcbrata) (in collaboration with A. R. CRUZ) b Allometric growth of the eye in hemispherectomized animals. Rattus rattus (Rodentia) (in collaboration with A. R. CRUZ and S. lUCIF) c Effect of hemispherectomy on the thyroid gland. Rattus rattus (Rodentia) (in collaboration with A. R. CRUZ and S. lUCIF) SABA, S. D.Sc. — Dept. of Botany, Fac. of Sci., Kyoto Univ., KYOTO, Japan a Histochemical study of cultured tissue (with electron microscope) (physiology and mor- phology). Daucus cacota (in collaboration with L. W. ROBERTS, Moscow, Idaho) b Histochemical study of wound periderm formation (with electron microscooe) (physiology and morphology). Solarium tuberosum (in collaboration with L. W. ROBERTS, Moscow, Idaho) c The effect of helminthosporol on xylogenesis (physiology). Coleus blumei (in collabora- tion with L. W. ROBERTS, Moscow, Idaho) d Effect of ruby laser irradiation on cell differentiation. (Plantae) BABAYEVA, Mrs. A. G. Cand.med.sci. — Inst, of Exper. Biol., Acad, of Med. Sci. of the U.S.S.R., Baltiyskaya St. 8, MOSCOW A-315. U.S.S.R. a Study of processes of organ regeneration. (Vertebrata) b Mechanisms of regeneration. (Vertebrata) c Immunology of reparative processes. (Vertebrata) BACKHOUSE. K. M. M.B., B.S. — Dept. of Anat., Charing Cross Hosp. Med. School, 62 Chandos Place. LONDON W.C.2. England a Gubernaculum testis and testicular descent. (Mammalia) b Early embryology and implantation. Halichoerus grypus (Pinnipedia) BACKSTROM. S. A. A. Fil.Dr. — Wenner-Gren's Inst, for exper. Biol., Norrtullsgatan 16, STOCKHOLM Va., Sweden a Basic proteins during oogenesis and early development (biochemical and histochemical methods). Paracentrotus lividus, Psammechinus miliatis (Echinoidea) BADE, E. G. M.D. — Inst, de Patol. Gener. y Exper., Fac. de Ciencias Med., Univ. Nac. de Cuyo, Casilla de Correo 513, MENDOZA, Argentina BADiNEZ, O. M.D., Prof . — Catedra de Embriol.. Escuela de Med., Univ. de Chile, Zaiiartu 1042. SANTIAGO, Chile a Compatibilizing role of mouse placenta (placenta reactions against compatible and incom- patible intrauterine tumor implants). Mus musculus (Rodentia) BAEVSKY. J. B. Cand.biol.sci. — Inst, of Biol. Physics. Acad, of Sci. of the U.S.S.R., Lenin Avenue 33. MOSCOW W-71. U.S.S.R. a Retardation of embryo development and state of maternal endocrine glands during em- bryonic diapause. Martes zibellina. Mustela vison (Carnivora), Rattus norvegicus, Mus musculus (Rodentia) b Cell and organ permeability at different stages of pregnancy. (Mammalia) BAFFONI, G. M. Dr.Biol.Sci., Prof. — 1st. di Anat. Comp.. Fac. di Sci. Fis. Mat. e Nat.. Univ. di Modena. Via Berengario 14. MODENA. Italia a Growth and differentiation of the nervous cell. (Cyclostomata; Teleosfei; Amphibia; Aves; Mammalia) b Mitotic ratio in the developing central nervous system. (Amphibia) c Regeneration of the nervous system in postmetamorphic animals. (Anura) d Oogenesis. (Crustacea) e Neurosecretion. (Annelida) f Differentiation of epidermal and intestinal epithelia. (Annelida; Crustacea) BAGWSKA (BORSUK). Mrs. I. M.D. — Inst, of Pathol. Anat.. Milit. Acad, of Med., Plac 9 Maja, CODZ. Poland BAGWSKI, S. M.D., Prof. (Emer.) — Narutowicza 94-9, isODZ, Poland • BAGNARA, J. T. Ph.D., Prof. — Dept. of Biol. Sci.. Univ. of Arizona. TUCSON. Arizona 85721. U.S.A. a Various aspects of the development and endocrinology of pigmentation. Many spp. (Amphibia) b Ultrastructure of chromatophores. Many spp. (Amphibia) c Developmental physiology of xanthophores, erythrophores, and iridophores. Many spp. (Amphibia) B AIR ATI. A. — 1st. di Genet., Univ. di Milano. Via Celoria 10, MILANO, Italia a Electron microscopy of tissues. Drosophila spec. (Diptera) BAKER. J. R. Ph.D. — Dept. of Zool.. Iowa State Univ.. AMES, Iowa 50010. U.S.A. a Incorporation and transport of labeled metabolities by early stage blastoderms in vitro. Gallus domesticus (Galli formes), Pygoscelis adelie (Spheniscidae, Aves) 13 BAKER, Mrs. P. C. Ph.D. — Dept. of Pathol., Med. School, Univ. of Oregon, PORTLAND, Ore. 97201, U.S.A. a The ultrastructural morphology and histochemistry of cells undergoing morphogenetic movement. Hyla regilla, Rana pipiens, Xenopus laevis (Anura) b The ultrastructure of wound healing. Hyla regilla, Rana pipiens, Xenopus laevis (Anura) c The ultrastructural morphology of the gastrula and neurula stages. Hyla regilla, Rana pipiens, Xenopus laevis (Anura) BAKER, T. G. Ph.D. — Dept. of Anat., Med. School, Univ. of Birmingham, Edgbaston, BIRMINGHAM 15, England a Oogenesis. (Primates) b The effects of X-rays on female germ cells. (Rodentia; Primates) c The fine structure and metabolic activity of oogonia and oocytes. (Rodentia; Primates) BAKKEREN, J. A. J. M. — Dept. of Biochem., Fac. of Med., Univ. of Nijmegen, Kapittelweg 40. NIJMEGEN, Netherlands a The Na-K activated ATP-ase cation pump and cation permeability in developing and regenerating liver. Rattus norvegicus (Rodentia) (in collaboration with S. L. BONTING) BAL, A. K. D.Phil. — Dept. of Biol., Fac. of Sci., Univ. of Montreal, Box 6128, MON- TREAL. Que., Canada a Changes in the membrane system of cells during differentiation (root meristem). Allium cepa h Changes in the membrane system during embryogenesis. Arbacia punctulata (Echinoidea) BALEGNO, H. — Inst, de Biol. Celular, Univ. Nac. de Cordoba, Casilla Postal 362. COR- DOBA, Argentina • BALINSKY, B. I. Dr.Biol.Sci., Prof. — Dept. of Zool.. Univ. of the Witwatersrand, Milner Park. JOHANNESBURG. S. Africa a An electron microscopic study of early development, (lower Vertebrata) BALLARD. W. W. Ph.D.. Prof. — Dept. of Biol. Sci.. Dartmouth Coll., HANOVER. N. H. 03755. U.S.A. a Morphogenetic movements in embryos. (Teleostei) h Monograph on developmental anatomy. Ambystoma spec. (Urodela) BALLS. M. Ph.D. — School of Biol. Scis.. Univ. of East Anglia. Wilberforce Road. NOR- WICH. NOR 85C. England a Neoplasms, particularly lymphosarcomas. Xenopus laevis (Anura) h Nuclear-cytoplasmic interaction in early development. Xenopus laevis (Anura) BALON, E. K. C.Ss. — Lab. of Fishery Science, 2elezna Studienka 806, BRATISLAVA, Czechoslovakia a Development of ossification. Esox lucius, Hucho hucho (Teleostei) b Embryology and life history studies. Hucho hucho, Cristivomer spec. (Teleostei) c Hybrid development. Rutilus rutilus carpathorossicus x Alburnus alburnus (Teleostei) d Further studies on development. Tilapia spec. (Cichlidae, Teleostei) BALTUS. Miss E. J. D.Sc. — Lab. de Morphol. anim., Univ. libre de Bruxelles, 67, Rue des Chevaux, RHODE-ST-GEN£SE, Belgique a Studies on DNA synthesis during oogenesis. (Amphibia) b Evolution of cytoplasmic DNA during embryonic development. (Amphibia) • BALTZER, F. Dr.. Prof. (Emer.) — Zool. Inst, der Univ. Bern. Sahlistr. 8, BERN. Schweiz BAMFORD. D. R. Ph.D. — Dept. of Zool.. Univ. Coll. of North Wales. BANGOR. Caer- narvonshire. Wales. U.K. a Protein transport across the neonatal intestine. Rattus rattus (Rodentia) BAND. R. N. Ph.D.. Prof. — Dept. of Zool.. Michigan State Univ.. EAST LANSING, Mich. 48823. U.S.A. BANERJEE. B. Ph.D. — Entomol. Dept.. Tea Research Assoc. Tocklai Exper. Station. CINNAMARA, P.O., Assam. India a Reproductive physiology and histochemical distribution of phosphatases. Odontotermes redemanni (Termitidae, Isoptera) BANKS. B. Dr. — Dept. of Chemistry, Univ. Coll. London. Gower St.. LONDON W.C.I. England BANTHORPE. D. V. Dr. — Dept. of Chemistry. Univ. Coll. London, Gower St., LONDON W.C.I, England BAPAT. Miss S. M.Sc — Dept. of Zool.. Shivaji Univ., Vidyanagar, KOLHAPUR-4, Maharashtra State, India BARABANOV. V. M. Cand.biol.sci. — Inst, of Exper. Biol.. Acad, of Med. Sci. of the U.S.S.R.. Baltiyskaya St. 8, MOSCOW A-315, U.S.S.R. a Immunochemical study of tissues in embryo and adult. Mus musculus (Rodentia) BARASA, A. — 1st. Anat. Anim. Domestic!, Univ. di Torino, Via Nizza 52, 10126 TORINO, Italia a Morphogenetic processes of the wing following removal of some parts. Gallus domesticus (Aves) b Mitochondria and lipochondria in cells cultured in vitro in various experimental conditions. Gallus domesticus (Aves) 14 c Origin of binucleate cells in cultures. (Aves) d Effect of subnormal temperatures on mitosis of cells cultured in vitro. (Aves) e Mitoses of binucleate cells. (Aves) BARBERA (PARR). Mrs. M. Ph.D. — Rockefeller Univ.. 500 E. 66th St., NEW YORK. N.Y. 10021. U.S.A. (no embryological work in progress) BARBIERI, F. D. Dr.. Prof. — Inst, de Biol., Fac. de Bioquim., Quim. y Farm., Univ. Nac. de Tucuman, Buenos Aires 289, TUCUMaN. Argentina a Chemistry and biological properties of fertilizin. Bu^o arenarum (Anura) b Nuclear transplantation. Buio arenarum (Anura) BARBOSA AYUCAR, E. Dr.en Med. — Serv. de Embriol. Exper., Dept. Anat. Prof. Dr. P. Gomes Bosque. Fac. de Med.. VALLADOLID. Spain a Effect of puromycin on morphogenesis. Gallus domesticus (Aves) BARCH, Mrs. S. H. Ph.D. — Zool. Dept., Biol. Research Center, Michigan State Univ., EAST LANSING. Mich. 48823. U.S.A. a Investigations of specificity of jelly-coat in fertilization (immunology, biochemistry). Rana pipiens, R. clamitans (Anura) b Studies on cleavage-block produced by antibodies. Rana spec. (Anura) c Development of tissue specificity of antigens (immunology). Rana pipiens (Anura) • BARIGOZZI. C. Dr.Sci., Prof. — 1st. di Genet.. Univ. di Milano. Via Celoria 10, MILA- NO, Italia a Development of melanomes with different genotypes. Drosophila spec. (Diptera) b DNA replication in cells cultured in vitro. Drosophila melanogastec (Diptera) BARKER, Mrs. J. NORTHROP Ph.D. — Dept. of Physiol.. Jefferson Med. Coll., 1025 Walnut St., PHILADELPHIA 7. Pa.. U.S.A. BARR. Miss G. B.Sc. — Dept. of Zool., The University, GLASGOW W.2, Scotland. U.K. a Control of cell migration of neural crest. Xenopus laevis (Anura) BARRA, H. — Inst, de Biol. Celular. Univ. Nac. de Cordoba, Casilla Postal 362, CORDOBA, Argentina BARSACCHI. Miss G. Dr.Biol.Sci. — 1st. di Zool. e Anat. comp. dell'Univ., Via A. Volta 4. PISA. Italia a Lampbrush chromosomes. (Urodela) BARTELMEZ, G. W. Ph.D. — Dept. of Embryol., Carnegie Inst, of Washington, 115 W. University Parkway. BALTIMORE, Md. 21210, U.S.A. — personal address: 224 Agnes Ave., MISSOULA, Montana, U.S.A. a Blood supply of uterus. Macaca mulatta (Primates) b Early development of optic vesicle. (Rodentia; Primates) c Earliest development of oral hypophysis. (Primates) d Effects of rubella on foetus. Homo sapiens (Primates) • BARTH. L. G. Ph.D., Prof. — Marine Biol. Lab.. Box 665, WOODS HOLE, Mass. 02543, U.S.A. BARTH, Mrs. L. J. Ph.D. — Marine Biol. Lab., Box 665, WOODS HOLE, Mass. 02543, U.S.A. BARTH, R. H.. Jr. Ph.D. — Dept. of Zool., The Univ. of Texas. AUSTIN, Tex. 78712, U.S.A. a Physiology of reproduction: role of corpora allata and neurosecretory system in control of reproductive behavior and physiology and regulation of the reproductive cycle of the female. Byrsotria fumigata, Leucophaea maderae, Nauphoeta cinerea and other spp. (Blattaria) h Effect of insect hormones on RNA metabolism during pupal diapause and adult develop- ment. Antheraea pernyi. Hyalophora cecropia and other spp. (Saturniidae) BARTONE, J. C. Ph.D. — Dept. of Anat., Howard Univ., Coll. of Med., WASHINGTON, D.C., U.S.A. BARTOS, F. — Dept. of Gen. Biol., Med. Fac, Charles Univ.. gimkova 870. HRADEC KRALOVfi. Czechoslovakia a Cytology of granulation tissue. Rattus norvegicus. Mus musculus (Rodentia) BARUA. D. N. Ph.D. — Bot. Branch, Tea Research Assoc, Tocklai Exper. Station. CINNA- MARA, P.O., Assam, India BATEMAN, A. J. Ph.D., D.Sc — Cytogenet. Dept., Paterson Labs., Christie Hosp. and Holt Radium Inst., Wilmslow Rd., MANCHESTER 20, England a The development of embryos with genotypes which are lethal because of aneuploidy or partial aneuploidy (progeny of translocation heterozygotes). Mus musculus (Rodentia) b Development of testis with special reference to Sertoli cells. Mus musculus (Rodentia) c Effect of X-rays on immature testis. Mus musculus (Rodentia) BATTAGLIA, B. D.Sc, Prof. — 1st. di Zool., Anat. comp. e Genet., Fac. di Sci., Via Loredan 10, PADOVA, Italia BATTLE. Miss H. I. Ph.D.. Prof. — Dept. of Zool., Coll. of Sci.. Univ. of Western Ontario, LONDON. Ont., Canada a Effects of chloramphenicol on early developmental processes. (Teleostei) 15 b Comparative effects of selective inhibitors of amino acid, protein and RNA synthesis on early developmental processes. (Teleostei) BAUMANN, J. A. Dr.. Prof. — Inst. d'Anat., Fac. de Med., Univ. de Geneve. 20 Rue de I'Ecole de Medecine. 1211 GENEVE 4. Suisse BAUME. L. J. D.M.D.. Prof. — Inst, de Med. Dentaire. 30 Rue Lombard, GENEVE. Suisse a Cephalogenesis: study of the development of the primordial chondrocranium, the establish- ment of ossification centers and synchondroses at the cranial base. Homo sapiens (Prima- tes), Rattus norvegicus (Rodentia) b Dentinogenesis: the histochemical assessment of the primordial dentine. Homo sapiens (Primates), Rattus norvegicus (Rodentia) BAXTER (GRILLO), Mrs. D. L. — Dept. of Anat.. Univ. of Ibadan. IBADAN, Nigeria a Histochemical, biochemical and cytological studies on functional differentiation of the gastro-intestinal tract. Gallus domesticus, (Aves), Rattus norvegicus (Rodentia), Homo sapiens (Primates) b Studies on glycogen metabolism in the yolk sac. Gallus domesticus (Aves), Rattus nor- vegicus (Rodentia), Homo sapiens (Primates) c Effects of hormones on lysosomal enzymes during development. Gallus domesticus (Aves), Rattus norvegicus (Rodentia), Homo sapiens (Primates) BAXTER. E. W. Ph.D. — Biol. Dept., Guy's Hosp. Med. School, LONDON S.E.I, England a Biology, including development and metamorphosis. Petromyzon spec. (Cyclostomata) b Food changes during larval period of growth. Ammocoetes (Cyclostomata) c Uptake and fate of "Thorostrast". Ammocoetes (Cyclostomata) d Effects of the anaesthetic M.S.222-Sandoz. Lampetra planeri (Cyclostomata) BEAMS, H. W. Ph.D., Prof. — Dept. of Zool., Univ. of Iowa, IOWA CITY. Iowa 52240, U.S.A. BEARN. J. G. B.S. — Anat. Dept., Middlesex Hosp. Med. School, LONDON W.l. England • BEATTY, R. A. Ph.D. — Inst, of Anim. Genet., King's Buildings. West Mains Rd.. EDINBURGH 9, Scotland, U.K. a Breeding of genetically tagged strains for use in experimental embryology. Oryctolagus cuniculus (Lagomorpha) b Heterospermic insemination and growth of embryo. Oryctolagus cuniculus (Lagomorpha), Bos bovis (Artiodacfyla) c Developmental biology and genetics of gametes. Drosophila spp. (Diptera), Mus musculus (Rodentia), Oryctolagus cuniculus (Lagomorpha) BEAUDOIN, A. R. — Dept. of Anat.. Med. School, Univ. of Michigan, East Med. Bldg., ANN ARBOR, Mich. 48104, U.S.A. a Experimental teratology: investigations into the mechanism of action of chemical teratogens and the analysis of the developmental malformations produced. BEAUMONT, Miss H. M. Ph.D. — Dept. of Anat., Med. School, Univ. of Birmingham, Edgbaston, BIRMINGHAM 15, England a Oogenesis. (Rodentia) b Effects of radiation on male and female germ cells. (Rodentia; Primates) c Metabolic studies on germ cells. (Rodentia; Primates) BEAUPAIN (CREPY), Mrs. D. Dr.es Sci. — Inst. d'Embryol. et Teratol. exper. du C.N.R.S., 49 bis Av. de la Belle Gabrielle, 94-NOGENT-sur-MARNE, France a Caracterisation des substances morphogenes qui interviennent au cours du developpement embryonnaire du poumon. Gallus gallus (Aves) b Caracterisation des substances inhibitrices de la regeneration du pharynx. (Turbellaria) BEAUPAIN, R. Drs. — Inst. d'Embryol. et Teratol. exper. du C.N.R.S.. 49 bis Av. de la Belle Gabrielle, 94-NOGENT-sur-MARNE, France a Analyse cytochimique et autoradiographique de I'interaction des deux parties des associa- tions de cellules cancereuses Z 200 et Z 516 et d'organes embryonnaires. Gallus gallus Aves) • BECK, F. M.D., Ch.B. — Dept. of Anat., Univ. Coll. of S. Wales and Monmouthshire, Newport Rd., CARDIFF, Wales, U.K. a The effect of trypan blue on development. (Mammalia) b Embryonic nutrition. (Mammalia) c The postnatal maturation of intestinal epithelium. (Mammalia) • BECKER, H. J. Ph.D., Prof. — Zool. Inst, der Univ. Munchen, Luisenstr. 14. 8 MuN- CHEN 2. Deutsche Bundesrepublik BECU§ (LAURENTIU). Mrs. M. M.D. — Dept. of Neuropathol., Research Station of Tirgu- Mures of the Acad, of the S.S.R., Str. Gh.Marinescu 38, TIRGU-MURE§, Romania a Morphological and histochemical studies of the enzymatic activity of the brain in corre- lation with myelination in various stages of the ontogenetical development. Gallus domesticus (Aves), Rattus norvegicus (Rodentia) (in collaboration with C. SZfiKELY) • BEERMANN, W. Dr.rer.nat., Prof. — Max Planck Inst, fiir Biol., Abt. Beermann. Spcmannstrasse 34, TUBINGEN, Deutsche Bundesrepublik a Puffing and differentiation of chromosomes in salivary glands. Chironomus tentans (Dip- tera) 16 • BEETSCHEN, J. C. Dr.es Sci., Prof . — Lab. de Biol, gener., Fac. des Sci., 118 Route de Narbonne. 31 -TOULOUSE. France a Recherches cytologiques, embryologiques et gcnetiques sur I'hcteroploidie experimentale. (Amphibia ) h Hybridation interspecifique. (Amphibia) c Etude d'un facteur recessif scmi-lctal, ac. Pleurodeles waltlii (Urodela) (en collaboration avec A. JAYLET) d Metamorphose induite experimentalement par la thyroxine. (Amphibia) e Etude experimentale de la diffcrenciation des cellules embryonnaires en culture in vitro. (Urodela) (en collaboration avec Mme A. M. DUPRAT) BELKA (GRZYBEK), Mrs. A. Ph.D. — Dept. of Gener. Biol., Silesian Acad, of Med., Rokitnica, ZABRZE 8, Poland BELL, E. Ph.D. — Dept. of Biol., Mass. Inst, of Techno!., CAMBRIDGE, Mass. 02139, U.S.A. BELL, L. G. E. Ph.D. — Dept. of Zool., Univ. of Southampton, SOUTHAMPTON, Hamp- shire, England BELLAIRS, A. d'A. D.Sc. — Dept. of Anat., St. Mary's Hosp. Med. School, LONDON W.2, England a Morphogenesis of skeleton. (Reptilia; Aves; Mammalia) b Embryonic membranes. (Reptilia) c Regeneration. (Reptilia) • BELLAIRS, Mrs. M. R. Ph.D. — Dept. of Anat. and Embryol., Univ. Coll. London, Gower St., LONDON W.C. 1, England a An electron microscopical and histochemical analysis of yolk formation. Gallus domesticus (Aves) BELLINI (CARDELLINI), Miss L. Ph.D. — 1st. di Zool. e Anat. Comp., Fac. di Sci., Univ. dcgli Studi, Piazza F. Marchetti, CAMERINO, Italia BELLONI, C. Dott.in Sci.biol. — 1st. di Zool. Gener., Fac. di Sci. Agraria, Univ. di Perugia, S.Pietro, PERUGIA, Italia a Azione della actinomicina D sullo sviluppo. Drosophila melanogaster (Diptera) BELOUSOV, L. W. Cand.biol.sci. — Dept. of Embryol., Fac. of Biol., Moscow Univ., MOS- COW V-234, U.S.S.R. BELSARE, D. K. Ph.D. — Post-Graduate Dept. of Zool., Univ. of Nagpur, NAGPUR, India a Development of the gonads. Notopterus notopterus (Notopteridae, Teleostei) h Studies on germ cells (descriptive and experimental). Channa punctatus (Ophicephalidae, Teleostei) c Physiology of embryonic heart with special reference to its response to adrenergic and cholinergic drugs. Gambusia a[iinis patruelis (Poecilidae), Channa punctatus (Ophicepha- lidae, Teleostei) (in collaboration with A. K. DORLE) d Lactic dehydrogenase activity in embryonic heart. Channa punctatus (Ophicephalidae, Teleostei) e Phospholipid distribution in embryonic liver. Channa punctatus (Ophicephalidae, Tele- ostei) BENAZZI (LENTATI), Mrs. G. Prof . — 1st. di Zool. e Anat. comp. dell'Univ., Via A. Volta 4, PISA, Italia a Cytochemistry of oogenesis, maturation divisions, fertilization and pseudogamy, polyploidy. (Tricladidea, Turbellaria) • BENAZZI, M. Prof. — 1st. di Zool. e Anat. comp. dell'Univ., Via A. Volta 4, PISA, Italia a Asexual reproduction, pseudogamy, polyploidy and heredity. (Tricladidea, Turbellaria) h Action of X-rays on development. (Tricladidea, Turbellaria) c Study of sex. Bacillus rossius (Phasmidae, Orthoptera) BENDER, H. A. Ph.D., Prof. — Dept. of Biol., Univ. of Notre Dame, NOTRE DAME, Ind. 46556, U.S.A. a Phenogenetic studies of the ovarian tissue of female-sterile mutants. Drosophila melano- gaster (Diptera) h Physiological genetics. Drosophila melanogaster (Diptera) BENIRSCHKE, K. M.D., Prof. — Dept. of Pathol., Dartmouth Med. School, HANOVER. N.H. 03755, U.S.A. a Study of fetal adrenal development. Das y pus novemcinctus (Edentata), Oedipomidas oedipus (Primates) b Chromosome studies. Dasypus novemcinctus (Edentata) c Study of placentation, fetal development and drug toxicity on the embryo. Dasypus novem- cinctus (Edentata) d Comparative chromosome studies. (Equidae, Camelidae, Artiodactyla) BENNETT, Mrs. D. Dr. — Dept. of Anat., Med. Coll., Cornell Univ., 1300 York Ave., NEW YORK, N.Y. 10021, U.S.A. • BENOIT, J. A. A. — Inst. d'Embryol. et Teratol. exper. du C.N.R.S., 49 bis Av. de la Belle Gabrielle. 94-NOGENT-sur-MARNE. France a Etude in vitro de I'embryon. Mus musculus (Rodenfia) 17 BEN-OR (MILSTEIN), Mrs. S. Ph.D. — Dept. of Physiol.. Hadassah Med. School, P.O.Box 1172, JERUSALEM. Israel a Molecular events that follow the induction of glutamo-synthetase in the embryonic retina in vitro (analysis of RNA and protein synthesis at the polysomal level). Gallus domesticus (Aves) BER. A. M.D.. M.V.D., Prof. — Endocrinol. Unit of the Rogoff Med. Res. Inst.. Beilinson Hospital. PETAH-TIKVA. Israel a Development of eye reaction to vitamin Bl. Hyla spec. Bufo spec, Pylobates spec. (Anura) BERDYSHEVA, Miss L. V. —Inst, of Developm. Biol.. Acad, of Sci. of the U.S.S.R., Vavilov St. 26. MOSCOW V-133. U.S.S.R. a The role of neurotransmitters in the first cleavage divisions. Strong ylocentrotus drobachien- sis, Paracentrotus lividus (Echinoidea) (in collaboration with G. A. BUZNIKOV) BERENDES, H. D. Dr. — Max Planck Inst, fur Biol., Abt. Beermann. Spemannstrasse 37. TUBINGEN. Deutsche Bundesrepublik a Induction and repression of puff activity in polytene chromosomes. Drosophila spp. (Diptera) b Gene function and differentiation in salivary gland cells. Drosophila spp. (Diptera) BERENDSEN. W. Drs. — Centrum voor Submicr. Onderzoek van Biol. Objecten. Rijks- universiteit. Janskerkhof 3. UTRECHT. Netherlands a Experimental morphology of cytoplasmic structures in early developmental stages. Limnaea stagnalis (Pulmonata. Gastropoda) • BERG. W. E. Ph.D., Prof. — Dept. of Zool.. Univ. of California, BERKELEY. Calif. 94720. U.S.A. BERGERARD, J. D.Sc. Prof. — Lab. de Zool., Fac. des Scis., Univ. de Paris, 91-ORSAY, France a Effects of thermal stress on sexual differentiation. Carausius morosus (Phasmidae, Insecta) • BERGQUIST. H. Ph.D. — Zool. Inst.. Univ. of Gothenburg. 4de Langgatan 7B. GOTE- BORG SV. Sweden a Experimental investigations on the neural tube. (Vertebrata) h Ultramicroscopical investigations on the integument. Homarus vulgaris (Crustacea). (Invertebrata) c Ultramicroscopical investigations on the stratum zonale. Gallus domesticus (Aves) BERLYN. G. P. Ph.D. — School of Forestry, Yale Univ.. 205 Prospect St.. NEW HAVEN. Conn. 06517. U.S.A. a The structure of germination. Pinus lambertiana (Pinaceae) BERNARD. CI. Lic.es Sci. — Lab. de Physiol, anim., Fac. des Sci., Route de Limoges, 86-POITIERS. France a Electrophysiological study of the embryonic heart. Rattus norvegicus, Cavia porcellus (Rodentia) BERNARD, F. Lic.es Sci. — Lab. de Zool.. Fac. des Sci. de Grenoble, Domaine Universi- taire. 38-SAINT-MARTIN-d'HERES, France a Organogenesis of the digestive tract and the air bladder. Salmo trutta fario, Leuciscus tutilus (Teleostei) BERNDORFER. A. Dr.med.habil. — Childrens Hosp. "Paul Heim". Dept. for congenital malformations, Ulloi ut 86, BUDAPEST VIII. Hungary — Private address: Benczur utca 39/a. BUDAPEST VI. Hungary a Clinical embryopathology. b Intrauterine regenerations of congenital malformations. c Biological study of malformations. d Etiology of malformations from clinical viewpoints. BERNFIELD. M. R. M.D. — Dept. of Pediatrics. Stanford Univ. School of Med., PALO ALTO, Calif. 94304, U.S.A. a Embryonic pancreas and salivary gland: synthesis of macromolecules (collagen, RNA, enzymes) during inductive interactions in vitro; relation between DNA synthesis and differentiation. Mus musculus (Rodentia) BERNSTEIN, G. S. Ph.D.. M.D. — Dept. of Reprod. Physiol.. Los Angeles County Gener. Hosp.. LOS ANGELES, Calif. 90033, U.S.A. — Dept. of Obstet. and Gynecol., Univ. of S.California, School of Med.. P.O.Box 96. LOS ANGELES, Calif. 90033. U.S.A. (no embryological work in progress) BERREUR (BONNENFANT). Mrs. J. Dr. 3e Cycle — Lab. de Genet. Evolutive, C.N.R.S.. 91-GIF-sur-YVETTE (Essonne), France a Controle hormonal de la differenciation sexuelle. (Isopoda, Crustacea) b Recherches sur les controles endocrines de la gametogenese par la culture in vitro. (Malacostraca, Crustacea) BERRILL. N. J. Ph.D. — 410 Swarthmore Avenue. SWARTHMORE. Pa. 19081. U.S.A. a Regeneration; metamorphosis; asexual reproduction (histogenesis). Branchiomma ( — Dasychone) nigromaculata. Sabella melanostigma (Sabellidae. Polychaeta) 18 BERTALANFFY, F. D. Ph.D.. Prof. — Dept. of Anat., Fac. of Med. and Dentistry, Univ. of Manitoba, 750 Bannatyne Ave., WINNIPEG 3. Manitoba. Canada a Rates of cell division of neoplastic cell populations. Rattus rattus, Mus muscutus (Roden- tia) b Mitotic rates of regenerating liver parenchyma. Rattus rattus (Rodenfia) c Cell renewal and cytodynamics of normal cell populations. Rattus rattus (Rodentia) BERTMAR, G. Fil.Dr. — Dept. of Biol.. Univ. of Umea. UMEA 6. Sweden a Developmental morphology of the snout. (Dipnoi; Amphibia) h Developmental morphology of dermal bones and scales. (Pisces) c Experimental developmental morphology of the olfactory organ. Salmo spec. (Teleostei) BERTOLINI. B. Dr.Biol.Sci. — 1st. di Anat. Comp. "Battista Grassi". Fac. di Sci.. Univ. di Roma. Via A. Borelli 50. ROMA. Italia a Ultrastructural cytochemistry of the various cell types in the oviduct during the repro>- ductive cycle and under experimental conditions. (Amphibia) b Subcellular localization of acid hydrolases in the acrosome of spermatozoa. Paracentrotus lividus (Echinoidea), Tritutus cristatus (Urodela), Rattus noruegicus (Rodentia) BETCHAKU. T. Ph.D. — Dept. of Biol., Yale Univ.. NEW HAVEN. Conn. 06520. U.S.A. a Studies in cell association. Various species BETTANIN (BELGRANO). Mrs. S. Dr.Nat.Sci. — 1st. di Zool., Univ. di Genova, Via Balbi 5. GENOVA, Italia a Embryo development of a parthenogenetic marine form. Penilia avirostris (Cladocera. Crustacea) (in collaboration with N. DELLA CROCE) b Development of the sexual forms. Penilia avirostris (Cladocera. Crustacea) (in collabo- ration with N. DELLA CROCE) BEYNON. A. D. B.D.S. — Dept. of Oral Anat., Sutherland Dental School, Univ. of New- castle upon Tyne, Northumberland Rd.. NEWCASTLE upon Tyne 1. England a Development of the root and periodontal ligament of the molar teeth. (Rodenfia) BHAGAVAN. N. V. Ph.D. — Dept. of Anat., School of Med.. Univ. of Hawaii, 2538 The Mall. HONOLULU. Hawaii 96822. U.S.A. a Molecular biology of cell differentiation and hormone action. (Bacteria: Protozoa: Roden- tia) BHATTACHERJEE. S. M.Sc — Dept. of Zool., Presidency Coll.. CALCUTTA 12. West Bengal. India BHUSSRY. B. R. D.D.S., Ph.D.. Prof. — Dept. of Anat.. School of Med.. Georgetown Univ., 3900 Reservoir Rd.. N.W.. WASHINGTON, D.C. 20007. U.S.A. a Effect of sodium fluoride on developing teeth. Rattus rattus (Rodentia) b Effect of vitamin D deficiency on developing bone (high calcium-phosphorus ratio diet). Rattus rattus (Rodentia) BIBORSKI, J. — Dept. of Reprod. Physiol., Inst, of Zootechn., Al.Mickiewicza 24-28, KRA- KoW, Poland a Development of mammary gland, epididymis and testis. (Mammalia) BIEBER, S. Ph.D. — Richard L. Conolly Coll., Long Island Univ., 385 Flatbush Ave. Exten- sion. BROOKLYN, N.Y. 11201, U.S.A. BIELAlol. Lab., State Univ. of Utrecht, Janskerkhof 3, UTRECHT. Netherlands a Nucleic acid metabolism during early developmental stages. Limnaea stagnalis (Gastropoda) h Synthesis of proteins during early developmental stages. Limnaea stagnalis (Gastropoda) BIGGERS, J. D. Ph.D.. Prof. — Div. of Popul. Dynamics. School of Hygiene and Public Health. The Johns Hopkins Univ.. 615 North Wolfe St., BALTIMORE, Md. 21205, U.S.A. a Organ culture of fallopian tubes and ovaries. (Mammalia) h Culture and metabolism of eggs. (Mammalia) c Oocyte maturation. (Asteroidea), Homo sapiens and other spp. (Mammalia) 19 d Reproduction and embryology of wild animals. (Mammalia) • BIJTEL. Miss J. H. Dr.Sc. M.D. — Dept. of Anat. and Embryol, State Univ. of Gronin- gen, Oostersingel 69, GRONINGEN, Netherlands a Experiments concerning the factors which determine the normal course of the outgrowing pronephric duct. Ambystoma mexicanum, Triturus taeniatus. Xenopus laevis (Amphibia) b Development and phylogenetic origin of the columella auris. Ambystoma mexicanum. Triturus taeniatus, Xenopus laevis (Amphibia) c Development of the naso-lacrimal duct. Xenopus laevis (Anura), Mus musculus (Rodentia) BILLETT, F. S. Ph.D. — Dept. of Zool.. Univ. of Southampton. SOUTHAMPTON, Hampshire, England a Effect of nucleic acid "anti-metabolites" on early development. Ambystoma mexicanum (Urodela), Gallus spec, Coturnix spec. (Aves) h Cytology of embryonic epidermis. (Amphibia) BILLINGTON, W. D. Ph.D. — Dept. of Zool., Univ. of Oxford, Parks Road, OXFORD, England a The invasive, hormonal, and immunological properties of the trophoblast. Mus musculus (Rodentia) BIRCH (ANDERSEN), A. — State Serum Inst., Amagerboulevard 80, COPENHAGEN S, Denmark a The ultrastructure of normal and pathological sperm. Bos taurus (Artiodactyla) (in colla- boration with E. BLOM, State Veter. Serum Lab.) BIRGE, W. J. Ph.D., Prof. — Div. of Sci. and Mathemat., Univ. of Minnesota, MORRIS, Minn. 56267, U.S.A. a Ultrastuctural differentiation of the endoplasmic reticulum and the Golgi complex. Gallus domesticus (Aves) b Correlated histochemical and ultrastructural studies of the differentiating choroidal epithe- lium. Gallus domesticus (Aves) c Ultrastructural organization of cilia and basal bodies of the choroid plexus. Gallus domesti- cus (Aves) d Ultrastructural differentiation of the epithehal junctional complex. Gallus domesticus (Aves) e Studies of the effect of in vitro storage upon the integrity of the genetic material (DNA) of spermatozoa. Bos taurus (Artiodactyla) BIRKY, C. W.. Jr. Ph.D. — Dept. of Zool., Univ. of California, BERKELEY, CaUf. 94720, U.S.A. a The synthesis of RNA, protein, and mitochondrial DNA in nurse cells and embryos, and the transfer of these materials from nurse cells to the maturing oocyte (light and electron microscope autoradiography). Asplanchna brightwelli. A. sieboldi (Rotifera. Aschelmin- thes) BISHOP, D. W. Ph.D. — Dept. of Embryol., Carnegie Inst, of Washington, 115 W. University Parkway, BALTIMORE, Md. 21210, U.S.A. a Contractile protein and contractile mechanisms of spermatozoa. (Mammalia) b Testicular enzymology. (Mammalia) c Immunologic impairment of spermatogenesis. Cavia spec. (Rodentia) BISHOP, M. W. H. Ph.D. — Dept. of Anim. Husbandry, Univ. of Bristol, Langford House, Langford, BRISTOL, England o BISHOP (CALAME), Mrs. S. M. Lic.es Sci. — Dept. of Poultry Husbandry, Univ. of Cahfornia, DAVIS, Calif. 95616, U.S.A. BLACK, R E. Ph.D., Prof. — Dept. of Biol., Coll. of William and Mary. WILLIAMS- BURG, Va. 23185, U.S.A. a Use of isotopes to trace metabolic pathways in embryos, (marine Invertebrata) h Development of enzymes related to Krebs cycle in embryos, ('marine Invertebrata) BLACKLER, A. W. Ph.D., Prof. — Div. of Biol.Sci., Cornell Univ.. ITHACA. N.Y. 14850. U.S.A. a Causal analysis of formation and differentiation of sex cells. Xenopus laevis. Rana spp. (Anura) h Nucleo-cytoplasmic relationships. Xenopus spp., Rana spp. (Anura) BLAKE, J. A. M.S. — Ira C. Darling Center (Marine Laboratory), Univ. of Maine, WAL- POLE, M. 04513, U.S.A. a Descriptive morphology of larval development from egg through metamorphosis. Polydora ligni, P. socialis, P. websteri (Sedentaria, Polychaeta) BLANCHET, J. P. Lie. es Sci. — Section de Biol, generale et appliquee, Fac. des Sci., Univ. de Lyon, 43, Bd. du 11 Novembre 1918, 69-VILLEURBANNE, France a Evolution des deshydrogenases lactiques au cours de 1 erythropoiese embryonnaire. Gallus domesticus (Aves) BLANDAU, R. J. Ph.D., M.D. — Dept. of Biol. Structure, School of Med., Univ. of Washing- ton. SEATTLE 5, Wash., U.S.A. BLAXTER, J. H. S. M.A. — Dept. of Nat. History, Marischal College, Univ. of Aberdeen. ABERDEEN, Scotland, U.K. a Rearing of larvae. Clupea pilchardus (Teleostei) 20 b Development of the eye in the larva, using histological techniques (including electron microscope). Clupca pilchardns, Plcuronectes platessa. Solea solea (Teleosfei) c Physiological experiments, especially the effect of light on larvae (spectral sensitivity, thresholds, brightness discrimination). (Tcteostci) BLECHSCHMIDT, E. Dr.med., o.o.Prof. — Anat. Inst, der Univ., Kreuzbergring 36, GOT- TINGEN, Deutsche Bundesrcpublik a Elektronenmikroskopie des Embryo. Homo sapiens (Primates) BLOCH, D. P. Ph.D., Prof. — Botany Dept., Univ. of Texas, AUSTIN, Tex. 78712, U.S.A. a Mechanism of histone synthesis in sperm development. Mytilus californicus (Lamelli- branchia), Rehnia spinosa (Katydidae. Orthoptera) b DNA synthesis and chromosome replication in the embryonic brain. Callus domesticus (Aves) BLOCK M H. Ph.D., M.D., Prof. — Dept. of Anat.. Univ. of Colorado Med. Center, 4200 E. 9th Ave.. DENVER, Colo. 80220, U.S.A. a Development of blood-forming tissues. Didelphys uirginiana (Marsupialia) b Effect of irradiation on development of blood-forming tissues. Didelphys uirginiana (Marsupialia) c Iron metabolism of blood-forming tissues. Didelphys uirginiana (Marsupialia) d Wound healing of blood-forming tissues. Didelphys uirginiana (Marsupialia) e Development of antibodies and correlation with development of hemopoietic tissues. Didelphys uirginiana (Marsupialia) f Role of thymus in development of lymphocytes in lymph nodes and spleen. Didelphys uirginiana (Marsupialia) g Experimental embryology. 1. Development of lymphatic tissue. 2. Atrophy of myeloid tissue. 3. Development of immunologic competence. Didelphys uirginiana (Marsupialia) BLOM. E. Dr.med.vet. — State Veter. Serum Lab., Bulowsvej 27, COPENHAGEN V. Den- mark a Studies on pathological conditions in the testis, epididymis and accessory sex glands. Bos faurus (Artiodactyla) b The ultrastructure of normal and pathological sperm. Bos faurus (Artiodactyla) (in col- laboration with A. BIRCH- ANDERSEN, State Serum Inst.) BLONDELET, J. Dr.en Med. — Lab. d'Embryol., Fac. de Med.. Univ. de Nancy, 31 rue Lionnois, 54 NANCY, France a Recherches sur les anomalies du caryotype. (Mammalia) BLONDHEIM, Mrs. S. A. M.Sc. — Dept. of Entomol. and Venomous Animals. The Hebrew Univ.. JERUSALEM, Israel a Environmental factors influencing development of eggs. Locusfa migratoria migrato- rioides, Nomadacris septemfasciata (Acrididae, Orthoptera) (in collaboration with M. P. PENER and A. SHULOV) b Oocyte development in adult females; embryonic development. Dociostaurus curuicercus, D. genei (Orthoptera) BLOOM, S. E. M.S. — Dept. of Poultry Sci.. Pennsylvania State Univ., 105 Weaver Bldg., UNIVERSITY PARK, Pa. 16802. U.S.A. a Cytochemistry of binucleated red blood cells in embryos and adults. Meleagris gallopauo (Aues) b Study of chromosomal anomalies in embryos. Callus domesticus. Meleagris gallopauo (Aues) • BLOUNT. R. F. Ph.D.. Prof. — Dept. of Anat.. Med. Branch. Univ. of Texas, GAL- VESTON. Tex., U.S.A. BLUEMINK, J. G. Ph.D. — Hubrecht Lab. (Internat. Embryol. Inst.), Uppsalalaan 1, Universiteitscentrum "De Uithof". UTRECHT. Netherlands a The subcellular structure of the blastula and the mobilization of the nutrient reserve. Limnaea stagnalis (Castropoda) b Electron microscopical investigation of neural and endo-mesodermal competence and the corresponding directions of differentiation in the blastula/gastrula stage. Ambystoma mexicanum (Urodela) (in collaboration with P. D. NIEUWKOOP. P. Th. M. van der SAAG and Miss G. A. UBBELS) c Subcellular aspects of functional differentiation in the parotid gland. Rattus rattus Rodentia) BLUNT. M H. Ph.D. — Dept. of Anat., Fac. of Rural Sci., Univ. of New England, AR- MIDALE. N.S.W.. Australia BLUZAT, R. R. — Lab. de Zool., Fac. des Scis., Univ. de Paris, 91-ORSAY, France a Experimental study with ionizing radiations of development of the gonads. Leptinotarsa decemlineata (Chrysomelida. Coleoptera) BODELET. B. — Lab. d'Embryol., Fac. de Med.. Univ. de Nancy. 31 rue Lionnois, 54 NANCY, France a Action de I'uree sur le developpement embryonnaire. (Mammalia) (en collaboration avec A. DOLLANDER) b Action de certains agents physiques sur le developpement embryonnaire. (Amphibia; Aues; Mammalia) (en collaboration avec A. DOLLANDER) 21 BODEMER, C. W. Ph.D. — School of Med., Univ. of Washington, SEATTLE, Wash. 98105, U.S.A. a Electrophysiology of developing nervous system. Didelphys virginiana (Marsupialia) • BODENSTEIN, D. Ph.D., Prof. — Dept. of Biol.. Univ. of Virginia, Gilmer Hall, CHAR- LOTTESVILLE, Va. 22903, U.S.A. a Fat metabolism. Drosophila met anog aster (Diptera) b Intergeneric grafts of organ discs. (Diptera) c The role of the prothoracic gland in postembryonic development. Periplaneta americana (Orthoptera) BODMAN, Sister M. C. Ph.D., Prof. — Dept. of Oral Pathol., School of Dentistry, Loyola Univ.. 1757 West Harrison St., CHICAGO, 111. 60612, U.S.A. a Ultracentrifugation separation of lysosomes in resorbing tadpole tails. Rana catesbeiana (Anura) • BOELL, E. J. Ph.D. — Dept, of Biol.. Kline Biol. Tower, Yale Univ.. NEW HAVEN. Conn. 06520, U.S.A. a Enzymatic changes in mitochondria during development. (Amphibia; Aves) b Hemoglobin synthesis during embryogenesis. BOFFI LUCARELLI, Mrs. A. M. Dr. — 1st. di Biol, gener., Fac. di Med., Univ. dl Roma, Viale di Porta Tiburtina 28, ROMA, Italia a Riserva ossidante negli embrioni. (Amphibia) h Respirazione nei meristemi radicali. Vicia faba BOGATOVA (NIKANOROVA), Mrs. R. I. Cand.med.sci. — Inst, of Exper. Biol., Acad, of Med. Sci. of the U.S.S.R., Baltiyskaya St. 8, MOSCOW A-315, U.S.S.R. a The peculiarities of cell replication in embryogenesis. Rattus rattus (Rodentia) BOHN, H. Dr.rer.nat. — Zool. Inst, der Univ.. Rontgenring 10, WuRZBURG, Deutsche Bundesrepublik a Regeneration and transplantation experiments on limbs; polarity and gradient systems. Leucophaea maderae, Periplaneta americana (Blaftaria, Orthoptera) BOLOGNANI (FANTIN), Mrs. A. M. — 1st. di Anat. comp., Univ. di Pavia, Piazza Botta 10, PAVIA. Italia a Development of (muco) polysaccharide components in the gastric epithelium. Gallus domesticus (Aves) b Functional differentiation of gastric epithelium. Mus musculus (Rodentia) c The cutaneous glands in metamorphosis (histochemical methods). Salamandra maculosa, S. atra (Urodela) BOLOGNARI, A. Prof. — 1st. di Zool. e di Anat. Comp., Univ. di Messina, MESSINA, Italia BONDI. C. Dott.. Prof. — 1st. di Anat. comp., Fac. di Sci., Univ. di Perugia. PERUGIA, Italia a Fotosensibilita cutanea e rigenerazione. Dugesia tugubris (Turbellaria) b Morfologia, fisiologia e rigenerazione del faringe. Dugesia lugubris (Turbellaria) c Trapianti xenoplastici e differenziazione. Triturus spec, Rana spec. (Amphibia) d Vitellogenesi. Branchiobdella pentodonta (Oligochaeta) • BONNER, J. T. Ph.D., Prof. — Dept. of Biol., Princeton Univ., PRINCETON, N.J. 08540, U.S.A. a Problems of morphogenetic movements and differentiation. (Acrasiales) BONS, J. — Lab. de Zool.. Fac. des Sci. de Montpellier. Place E. Bataillon. 34-MONT- PELLIER, France a Developpement. Agama hibroni (Agamidae. Lacertilia) BONTING. S. L. Ph.D., Prof. — Dept. of Biochem., Fac. of Med., Univ. of Nijmegen, Kapittelweg 40, NIJMEGEN, Netherlands a Development of the rhodopsin cycle; rhodopsin, electroretinogram and morphology from birth till maturity. Canis domesticus (Carnivora) (in collaboration with F. J. M. DAE- MEN) b The Na-K activated ATP-ase cation pump and cation permeability in developing and regenerating liver. Rattus norvegicus (Rodentia) (in collaboration with J. A. J. M. BAK- KEREN) BOOKHOUT, C. G. Ph.D., Prof. — Marine Lab.. Duke Univ., BEAUFORT, N.C. 28516, and Dept. of Zool., Duke Univ., DURHAM, N.C. 27706. U.S.A. BOON-NIERMEYER, Mrs. E. K. M.Sc. — Zool. Lab.. State Univ. of Utrecht, Janskerkhof 3, UTRECHT, Netherlands a Influence of some antibiotics on certain stages of development. Limnaea stagnalis (Gastro- poda) BOONE, M. A. Ph.D., Prof . — Poultry Sci. Dept., Clemson Univ., CLEMSON. S.C. 29631. U.S.A. a Effect of anticarcinogens and other drugs on embryonic development. Gallus domesticus (Aves) b Effect of high ambient temperature on semen and egg production. Gallus domesticus (Aves) 22 c Development of drug bio-assay system by growing embryos in beakers. Gallus domesticus BOOTHROYD, B. Ph.D. — Histol. Dept., Fac. of Med., Univ. of Liverpool, LIVERPOOL, Lancashire, England a Fine structure of developing bone. b Micro-anatomy and development. Microiilaria spec. (Nematoda) BOPP. M. Dr.rer.nat., Prof. — Inst, fur Botanik, Techn. Hochschule, Herrenhauserstr. 2, 3 HANNOVER, Deutsche Bundesrepublik a Crown-gall development and initiation. Bryophyllum daigremontianum h Development; morphogenesis of protonema. Funaria hygrometrica (Bryophyta) c. Shoot growth and DNA synthesis. BORELLI. Miss A. P. Dr.Biol.Sci. — 1st. di Zool. dell'Univ., Viale Regina Elena 324 (al Policlinico). ROMA, Italia a Growth and differentiation of regeneration blastema in vivo and in vitro. Planaria torva, Dugesia etrusca (Turbellaria) (in collaboration with P. PASQUINI) • BORGHESE, E. M.D., Dr.Biol.Sci., Prof. — 1st. di Anat. Topogr., Univ. di Napoli, Via L. Armanni 5, NAPOLI, Italia a Culture in vitro of embryonic organs. Mus musculus (Rodenfia) b Effect of ionizing radiations on embryonic development. (Mammalia) c Embryology of kidney. Mus musculus (Rodentia) BORISOV, I N. Kand.biol.sci. — Chair of Histol. and Embryol., Archangelsk State Med. Inst.. Av. p.Vinogradow 51, ARCHANGELSK, U.S.S.R. BOROjEVIC, R. D.E.S. — Lab. de Biol. Invertebres marins. Museum Natl. d'Hist. natu- relle Paris, 57 Rue Cuvier, PARIS 5, France a Descriptive and experimental morphology, morphogenesis. (Porifera) BORSTEL, R. C. von Ph.D. — Biol. Div., Oak Ridge Nat. Lab., P.O.Box Y, OAK RIDGE. Tenn. 37831, U.S.A. a Induction of chromosomal puffs in larval salivary glands by ribonuclease; cytidine uptake and net amounts of RNA and protein of these puffs. Drosophila buskii (Dipfera) h Developmental genetics. Habrobcacon juglandis (Hymenoptera) BORSUK, Mrs. R. A. Cand.biol.sci. — Dept. of Embryo!., Fac. of Biol., Moscow Univ., MOSCOW V-234, U.S.S.R. BOSCHKOW, D. K. M.Sc. — Inst, of Zool., Bulg. Acad, of Sci., bul. Ruski 1, SOFIA. Bulgaria a The influence of the yolk of the lizard egg on the chick embryo. Lacerta viridis, L. agtlis. L. muralis (Lacertilia), Gallus domesticus (Aves) BOSCHWITZ, Miss B. D. Ph.D. — Dept. of Zool., Hebrew Univ. of Jerusalem, JERUSA- LEM, Israel a Seasonal changes in the parathyroid. Bufo viridis (Anura) b Seasonal changes in the ultimobranchial body. Bu[o viridis (Anura) c Multiplication of motor end plates in the diaphragm of growing animals. Mus musculus (Rodenfia) d Thyroid deficiency and metamorphosis. Pelobafes spec, Hyla spec. (Anura) BOSSHARD, H. J. Dipl.Sc.Nat. — Zool.-vergl.Anat. Inst., Naturwiss. Fak., Univ. Zurich, Kunstlergasse 16, 8006-ZuRICH, Schweiz a Xenoplastic transplantations of nephrogenic tissue. Triturus alpesfcis (Urodela), Bombina variegafa (Anura) BOSSY, J. G. M. M.D. — Dept. of Anat., School of Med., St. Louis Univ., 1402 South Grand Blvd.. ST. LOUIS. Mo. 63104, U.S.A. a Study of melanotic embryo of 15 mm V.C. Homo sapiens (Primates) b Mitotic index in the ependymal layer of the embryonic brain: topographic variations. Homo sapiens (Primates) c Development of the mucous lining of the auditory tube. Homo sapiens (Primates) d Myelinization of the dorsal root-spinal cord junction. Homo sapiens (Primates) BOTERENBROOD, Miss E. C. Ph.D. — Hubrecht Lab. (Intern. Embryol. Inst.), Uppsala- laan 1, Universiteitscentrum "De Uithof", UTRECHT, Netherlands a Analysis of regional distribution of differentiation tendencies in the prosencephalic part of the neural plate. Triturus alpestris. Pleurodeles Waltlii (Urodela) b Culture methods for explants and reaggregates of presumptive prosencephalic tissue. Triturus alpestris, Pleurodeles Waltlii (Urodela) BOTH, N. J. de M.Sc. — Hubrecht Lab. (Internat. Embryol. Inst.). Uppsalalaan 1, Univer- siteitscentrum "De Uithof", UTRECHT, Netherlands a Transplantation of limb regeneration blastemas: the role of mesenchymal mass in regional organization. Ambystoma mexicanum (Urodela) BOTTE, V. Veter.Dr. — 1st. di Zool. e Anat. Comp., Fac. di Sci., Univ. degli Studi, Piazza F. Marchetti, CAMERINO, Italia BOUCK, G. B. Ph.D., Prof. — Dept. of Biol., Yale Univ., NEW HAVEN, Conn. 06520, U.S.A. a Biochemistry and cytology of development. Fucus vesiculosus. F. spiralis (Phaeophyta) 23 BOULEKBACHE, H. Lic.es Sci.Nat. — Lab. d'Anat. comp., Fac. des Sci., 7 Quai St. Ber- nard, PARIS Ve, France a Etude des enzymes du cycle de la glycolyse dans I'oeuf. (Teleostei) t BOUNOURE, L. Prof. — Lab. de Biol, gener., Inst, de Zool. et de Biol, gener., Fac. des Sci., 12 Rue de I'Universite, STRASBOURG, France (deceased) BOUVET, J. L. Dr. — Lab. de Zool., Fac. des Sci. de Grenoble, Domaine Universitaire, 38-SAINT-MARTIN-dHERES, France a Experimental studies on the development of the paired fins. Salmo ttutta fario (Teleostei) BOVBJERG (BLANCHARD), Mrs. A. M. Ph.D. — Dept. of Zool., Univ. of Iowa, IOWA CITY, Iowa 52240, U.S.A. a Skin grafting: factors affecting graft rejection and the nature of the immune reaction. Rana pipiens, R. catesbeiana (Anura) b Time and nature of determination of some areas of skin. Rana pipiens (Anuca) • BOVING, B. G. M.D. — Dept. of Embryol., Carnegie Inst, of Washington, 115 W. University Parkway, BALTIMORE, Md. 21210, U.S.A. a Blastocyst spacing, orientation and implantation mechanisms. Oryctolagus cuniculus (Lago- morpha) b Relation of trophoblast invasion to bloodvessels underlying uterine epithelium, and the anatomical, mechanical and chemical basis for it. Oryctolagus cuniculus (Lagomorpha) c Identification and function of non-cellular blastocyst coverings. Oryctolagus cuniculus (Lagomorpha) d Structure and function of trophoblast knobs. Oryctolagus cuniculus (Lagomorpha) • BOYD, J. D. D.Sc, M.D., Prof. — Anat. School, Univ. of Cambridge. CAMBRIDGE, England a The development and structure of the placenta. Homo sapiens (Primates) (in collaboration with W. J. HAMILTON, London) BOYDE, A. Ph.D. — Anat. Dept., London Hosp. Med. Coll., Turner St., LONDON E.l, England a Dental enamel development; descriptive morphology of enamel development, using electron microscopy, scanning electron microscopy, scanning probe X-ray microanalysis. (Mam- malia) BOYDEN, E. A. Ph.D., Prof. (Emer. )— Dept. of Biol. Struct., Med. School, Univ. of Washington, SEATTLE, Wash. 98105, U.S.A. a Postnatal growth of the lungs (from late fetal stage to adult). Canis spec. (Carnivora), Homo sapiens (Primates) b Embryonic explanation of intraluminal diverticulum of duodenum; and of duodenal atresia and stenosis. Homo sapiens (Primates) c Development of choledocho-duodenal junction. ( Balaenopfera, Cetacea) • BRACHET, J. L. A. M.D., D.Sc, Prof. — Lab. de Morphol. Anim., Univ. libre de Bruxel- les, 67, Rue des Chevaux, RHODE-ST-GENESE. Belgique a Studies on the metabolism of lethal hybrids. (Echinoidea: Amphibia) h Studies on protein synthesis in anucleate eggs. Arbacia spec. (Echinoidea) c. Effects of actinomycin D and puromycin on oogenesis and maturation. (Amphibia) d Effects of hydroxyurea on morphogenesis. (Echinoidea; Amphibia) BRADBUR, C. Ph.D. — Biochem. Dept., School of Med.. Univ. of Virginia. CHARLOT- TESVILLE. Va. 22901. U.S.A. a A comparative study of the properties of enzymes involved in deoxyribonucleotide biosynthesis and degradation in relation to the overall control of DNA synthesis and cell division. Gallus domesticus (Aves), Oryctolagus cuniculus (Lagomorpha), Canis {amiliaris (Carnivora) BRADEN, A. W. H. Ph.D. — Div. of Anim. Physiol., C.S.I.R.O., Ian Clunies Ross Anlm. Res. Lab., Great Western Highway, (P.O. Box 144, Parramatta), PROSPECT, N.S.W., Australia a Fertilization. Ovis spec. (Artiodactyla) b Prenatal mortality. Ovis spec. (Artiodactyla) • BRAHMA. S. K. D.Phil., Ph.D. — Dept. of Anat. and Embryol.. State Univ. of Utrecht. Janskcrkhof 3A, UTRECHT. Netherlands a Immunochemical studies of lens proteins. (Vertebrata) (in collaboration with W. J. van DOORENMAALEN) • BRAMBELL, F. W. R. Ph.D., D.Sc, Prof. — A.R.C. Unit, of Embryol., Dept. of Zool., Univ. Coll. of North Wales, BANGOR, Caernarvonshire, Wales, U.K. a Immunological relations of mother and young. (Mammalia) BRANDLE, K. A. Dr.rer.nat. — Zool. Inst, der Techn. Hochschule, Kaiserstr. 2, 75-KARLS- RUHE, Deutsche Bundesrepublik a Preparation and rearing of animals with six or more limbs for research on modes of locomotion. Ambystoma spec. (Urodela) h Xenoplastic transplantation of neural plates for the study of relations between central nervous system and behaviour. (Amphibia) BRANDT, I. K. M.D. — Dept. of Biol., Yale Univ., NEW HAVEN, Conn. 06520, U.S.A. 24 a Developmental genetics. Rana pipiens, Xenopiis laevis (Anura) BRANDT, W. H. Ph.D., Prof. — Dept. of Botany & Plant Pathol.. Oregon State Univ., CORVALLIS, Ore. 97331, U.S.A. a Isolation and identification of the morphogenetic factor responsible for the development of microsclerotia. Verticillium albo-atrum (Fungi) BRAUCKMANN, Miss E. S. Dr. — Inst, de Biol., Fac. de Bioquim., Quim. y Farm., Univ. Nac. de Tucuman, Buenos Aires 289. TUCUMaN, Argentina a Biochemistry and electron microscopy of neural tube closure. Bufo arenantm (Anura), Gallus domcsticus (Aves) BRAUM, E. Dr. — Inst, fur Hydrobiol. und Fischereiwiss., Univ. Hamburg, Olbersweg 24, 2 HAMBURG- Altona 1, Deutsche Bundesrepublik a Developmental problems of eggs in the mud-water layers of lakes (preliminary experiments on incubation of exposed egg samples in a deep lake). Coregonus warimanni (Teleostei) h Malformations observed in newly hatched larvae. Coregonus wartmanni (Teleostei) c The influence of temperature, oxygen pressure and water flow on eggs and larvae. Esox lucius, Coregonus spp. (Teleostei) BRAVERMAN, M. H. Ph.D. — Div. of Radiat. Biol., Allegheny Gener. Hospital, 320 E. North Ave., PITTSBURGH, Pa. 15212. U.S.A. a Systems analysis of colony pattern and computer simulation of colony growth. Podocoryne carnea (Hydroidea) b Macromolecular control of the initiation of lens morphogenesis and lens protein synthesis in vitro. Gallus domesticus (Aves) BRESCIANI, J. M.Sc. — Inst, of Comp. Anat., Univ. of Copenhagen, Universitetsparken 15, COPENHAGEN 0, Denmark a Organogenesis. Gonophysema gullmarensis (Copepoda, Crustacea) b Organogenesis (ultrastructural). (Dicyemidae, Mesozoa (in collaboration with T. FEN- CHEL) c Embryology (ultrastructural). Cercaria affinis (Digenea, Trematoda) BREUGEL. F. M. A. van — Dept. of Genet., Fac. of Sci., Univ. of Leiden, Kaiserstraat 63, LEIDEN, Netherlands a Cytological differentiation in white-mottled mutants. Dcosophila melanogaster, D. hydei (Diptera) BREWIN, Miss B. I. D.Sc. — Dept. of Zool., Univ. of Otago. DUNEDIN, New Zealand BRICK, I. Ph.D., Prof. — Dept. of Biol., Grad. School of Arts and Sci., New York Univ., Washington Square, NEW YORK, N.Y. 10003, U.S.A. a Tissue affinities in developing melanophores studied by time-lapse photography. AmbystO' ma mexicanum (Urodela) b Genetic control of cell surfaces in the development of pigment pattern. Amby stoma mexicanum (Urodela) c Analysis of melanophore determination at the molecular level. Ambystoma mexicanum (Urodela) BRIDE, Miss J. Lic.es Sci. — Lab. de Zool., Inst, des Sci. Nat., Fac. des Sci., Univ. de Besancjon, Place Marechal Leclerc, 25-BESANgON, France a Developpement embryonnaire de la glande uropygienne. (Aves) (en collaboration avec L. GOMOT) BRIDE (VUILLET). Mrs. M. Lic.es Sci. — Lab. de Zool.. Inst, des Sci. Nat.. Fac. des Sci.. Univ. de Besangon, Place Marechal Leclerc, 25-BESANCON, France a Recherches sur le developpement in vivo et in vitro du coeur. Rana temporada (Anura) BRIEGEL, H. Dipl.Sc.Nat. — Zool.-vergl.Anat. Inst., Univ. Zurich, Kunstlergasse 16, 8006- ZURICH, Schweiz a Free amino acids during embryogenesis (chromatography). Culex pipiens (Diptera) BRIEGLEB, W. Dr.rer.nat. — DVL-Inst. fiir Flugmedizin, Kolnerstr. 70, 532 BAD CODES- BERG, Deutsche Bundesrepublik a Einfluss von Licht und hoher Temperatur auf die Ontogenese einer neotenen Art aus einem Hohlenbiotop. Proteus anguinus (Proteidea, Urodela) b The influence of simulated weightlessness on the development of microbionts and cell cultures, c The influence of simulated weightlessness on development. Tribolium castaneum (Co- leoptera) • BRIEN, P. L. Dr.Sc.Zool., Prof .Hon. — Inst, de Zool. Torley-Rousseau, Fac. des Sci., Univ. libre de Bruxelles, 50 Ave. F. D. Roosevelt, BRUXELLES, Belgique • BRIGGS, R. W. Ph.D., Prof. — Dept. of Zool., Indiana Univ., BLOOMINGTON, Ind., U.S.A. BRINCK-JOHNSEN, T. Ph.D. — Dept. of Pathol., Dartmouth Med. School, HANOVER. N.H. 03755, U.S.A. a Placental and fetal steroidogenesis. Dasypus novemcinctus (Edentata) BRINSTER, R. L. Ph.D., Prof. — King Ranch Lab. of Reprod. Physiol., School of Veter. Med., Univ. of Pennsylvania, 530 Lippincott Bldg., 25th & Locust Sts.. PHILADELPHIA. Pa. 19103, U.S.A. 25 a Fertilization; physiology and biochemistry of ova and early cleavage stages. (Mammalia^ • BR0NDSTED. H. V. Dr.Phil., Prof.(Emer.) — Stockholmsgade 23, COPENHAGEN, Denmark a Physiology and regeneration. (Porifera; Turbellaria) b Embryology. Mus musculus (Rodentia) BROOKBANK, J. W. Ph.D. — Dept. of Zool., Univ. of Florida. GAINESVILLE. Fla.. U.S.A. BROOKS (LAWRENCE), Mrs. B. — Histol. Dept., Fac. of Med., Univ. of Liverpool. LIVER- POOL, Lancashire. England a Epithelial disaggregation and reaggregation and growth in vitro. BROSEMER. R. W. Ph.D., Prof. — Dept. of Chem.. Washington State Univ., PULLMAN, Wash. 99163, U.S.A. a The morphological and enzymic development of flight muscle. Apis metlifera (Hymenop- tera) BROUWER, P. J. Med.Drs. — Dept. of Anat. and Embryol., Free Univ. of Brussels, 97 Rue aux Laines, BRUXELLES, Belgique BROWN, D. D. M.D. — Dept. of Embryol., Carnegie Inst, of Washington, 115 W. Uni- versity Parkway, BALTIMORE. Md. 21210, U.S.A. — Dept. of Biol.. Johns Hopkins Univ., Charles and 34th Sts., BALTIMORE, Md. 21218, U.S.A. a Biochemical studies of early development. Rana pipiens, Xenopus laevis (Anura) BROWN, E. H. Ph.D. — Dept. of Zool., Univ. of Illinois, 345 Nat.Hist.Build., URBANA, 111. 61820, U.S.A. a Genetic and cytological aspects of oogenesis. Drosophita metanogaster (Diptera) BROWN, J. A. M. Ph.D. — Dept. of Biol.. Univ. of Notre Dame, NOTRE DAME, Ind. 46556, U.S.A. a Developmental physiology, particularly meristem metabolism in floral morphogenesis. Arabidopsis thaliana (Crucifereae) b Floral induction as affected by deoxyriboside base analogues and photoperiod. Arabidopsis thaliana (Crucifereae) BROWN, J. W. Ph.D., Prof. — Dept. of Anat., Univ. of Alabama Med. Center. 1919 Seventh Ave. South, BIRMINGHAM, Ala. 35233, U.S.A. BRUMMETT, Miss A. R. Ph.D. — Dept. of Biol., Oberlin Coll., OBERLIN, Ohio 44074, U.S.A. a Experimental analysis of morphogenetic movements and differentiation in the early gastrula by deletion-explantation techniques. Fundulus heferocUtus (Teleostei) h Analysis of biochemical differences in various presumptive regions of the early gastrula. Fundulus heteroclitus (Teleostei) c Factors influencing graft vs. host antagonism in anterior shield grafts. Fundulus heteroclitus (Teleostei) BRUN, J. L. — Section de Biol, generale et appliquee, Fac. des Sci., Univ. de Lyon, 43, Bd. du 11 Novembre 1918, 69-VILLEURBANNE, France a Adaptation aux temperatures elevees. Caenorhabditis elegans (Nematoda) BRUNST. V. V. Dr.biol.Sci. — Roswell Park Memorial Inst., 666 Elm St., BUFFALO, N.Y. 14203, U.S.A. a Experimental embryology. Siredon mexicanum (Urodela) b Regeneration. Siredon mexicanum (Urodela) c Chromosomes. Siredon mexicanum (Urodela) d Tumors. Siredon mexicanum (Urodela) BRUST, R. Ph.D. — Univ. of Manitoba, WINNIPEG, Manitoba, Canada a The influence of thermal stress on development. Aedes spp. (Culicidae, Diptera) BRYAN, J. H. D. Ph.D. — Dept. of Zool., Coll. of Arts and Scis., Univ. of Georgia, ATHENS, Ga. 30601, U.S.A. a Cytochemical studies of gamete formation. Mus musculus (Rodentia) h Nucleic acid-protein ratios during growth and differentiation. Mus musculus (Rodentia) c Cytochemical studies of nuclear proteins (in differentiating and adult tissues). Mus mus- culus (Rodentia) d Studies of differentiation of spermatozoa in mutant animals (light- and electron microscope studies). Mus musculus (Rodentia) BUCHANAN, G. D. Ph.D.. Prof. — Dept. of Anat.. School of Basic Med. Sci.. Med. Units. Univ. of Tennessee, 62 S. Dunlap St., MEMPHIS. Tenn. 38103. U.S.A. a Reproductive physiology, including histology and histochemistry of the reproductive tract. Mustela furo (Cacnivora) BUGGE, J. M.Sc. — Dept. of Anat.. The Royal Dental Coll., AARHUS. Denmark a Development of the stapedial artery. (Myomorpha. Rodentia) b Development of the cerebral, pericentricular vasculature. Mus musculus (Rodentia) c Malformations of the vascular system of brain and head. Mus musculus. Rattus norvegicus (Rodentia) (in collaboration with P. A. KNUDSEN) BULLIERE, D. Dr. — Lab. de Zool.. Fac. des Sci. de Grenoble. Domaine Universitaire, 38-SAINT-MARTIN-d'H£RES. France 26 a The regeneration and factors of morphogenesis in the larval leg. Blabera craniifec (Dicty- optera) BULLIERE (CHALLANDE). Mrs. F. Lice Sci. — Lab. de Zool., Fac. des Sci. de Grenoble, Domaine Universitaire. 38-SAINT-MARTIN-d'H£RES. France a Embryonic development and mechanisms of embryonic moults. Blabera craniifer (Dictyop- BULMER. D. M.D. — Dept. of Anat., Univ. of Manchester, MANCHESTER 13, England a Cytochemistry of developing female genital tract. Various spp. (Mammalia) b Cytochemistry of placenta. (Rodentia) BUNO. W. M.D. — Sect, of Exper. Neurol., Inst, of Neurol., Hosp. de Clinicas, MONTE- VIDEO, Uruguay a Regulation of cochlear input in the developing animal. Cavia cobaya (Rodentia) BURDA, Miss D. J. Ph.D. — Dept. of Anat., School of Med., Stanford Univ., STANFORD. Calif. 94305, U.S.A. a Development and experimental modification of cerebrovascular system. Gallus domesticus (Aves) b Early growth and differentiation of brain. Gallus domesticus (Aves) BURDI, A. R. Ph.D. — Dept. of Anat.. Med. School, Univ. of Michigan, East Med. Bldg., ANN ARBOR, Mich. 48104, U.S.A. a Quantitative growth analysis of the craniofacial, dental and palatopharyngeal regions of normal and abnormal embryos. Homo sapiens (Primates) h The development of biomechanic and architectural properties of the musculoskeletal system of the head before birth. Homo sapiens (Primates) c Tissue interaction underlying the embryogenesis of the face. Homo sapiens and other spp. (Mammalia) • BURDON-JONES. C. Ph.D., Prof. — School of Biol. Sci., Univ. Coll. of Townsville. Pimlico, TOWNSVILLE, Queensland, Australia a Development and regeneration. Rhabdopleura normani. Cephalodiscus spec, and other spp. (Pterobranchia. Hemichordata) BURGESS, Miss A. M. C. Ph.D. — Dept. of Anat. and Embryol., Univ. Coll. London, Gower St., LONDON W.C.I, England a Ribosome synthesis in dedifferentiating and redifferentiating regenerating tissues. Xenopus laevis, Ambystoma spec. (Amphibia) h Oogenesis. (Aves) • BURNS, R. K. Ph.D. — Bridgewater College, BRIDGEWATER, Va. 22812, U.S.A. BURTON, A. L. M.D., Prof. — Dept. of Anat.. South Texas Med. School, The Univ. of Texas, 715 Stadium Drive, SAN ANTONIO, Tex. 78212, U.S.A. a Development of mast cells in connective tissue of embryonic skin. Mus norvegicus albinus (Rodentia) BUSS, E. G. Ph.D., Prof. — Dept. of Poultry Sci.. The Pennsylvania State Univ.. 105 Weaver Bldg., UNIVERSITY PARK, Pa. 16802, U.S.A. a Cause of parthenogenesis. Meleagtis gallopavo (Aves) b Karyotypes of aberrant types of embryos. Gallus domesticus, Meleagris gallopavo (Aves) • BUTLER, E. G. Ph.D., D.Sc, Prof. — Dept. of Biol., Princeton Univ., PRINCETON, N.J. 08540, U.S.A. a Study of the mechanics of the formation of the regeneration blastema; the influence of nerves on blastema formation; regression in nerveless non-regenerating limbs. Ambystoma punctatum, A. opacum (Urodela) b Effects of ultraviolet radiation on limb development and supernumerary limb regeneration. (Urodela) c Problems of polarity in the limb; regeneration after reversal of the proximo-distal axis. (Urodela) d Study of epidermal hyperplasia. (Urodela; Mammalia) e Spinal cord reconstitution after ablation. (Urodela) BUTLER, H. M.D., B.Chir. — Dept. of Anat. Univ. of Saskatchewan. SASKATOON. Sask.. Canada a Reproductive cycle, implantation, placentation and early embryology. Galago senegalensis senegalensis ( Lemuroidea, Primates) • BUTROS, J. M. Ph.D., Prof. — Biology Dept., American Univ. of Beirut, BEIRUT, Lebanon a Differentiation in explanted fragments of early blastoderms. Gallus domesticus (Aves) h Promoting action of RNA from embryonic organs on differentiation of fragments of early blastoderms. Gallus domesticus (Aves) BUTTERWORTH. F. M. Ph.D. — Dept. of Biol., Oakland Univ., ROCHESTER, Mich. 48063, U.S.A. a The hormonal and genetic control of development of the adipose tissue on the cellular and biochemical level (microsurgical, transplantation, cytological and biochemical techniques). Drosophila melanogaster (Diptera) BUZNIKOV, G. A. Dr.biol.sci. — Inst, of Developm. Biol. Acad, of Sci. of the U.S.S.R.. Vavilov St. 26, MOSCOW V-133, U.S.S.R. 27 a The role of neurotransmitters (acetylcholine, serotonin, catecholamines) in early embryo- genesis. Strong ylocentrotus dcobachiensis, S. nudus, S. intermedius, Paracentrotus lividus, Arbacia lixula, Sphaerechinus, granulans (Echinoidea). Misgurnus fossilis (Cobifidae, Teleosfei), Rana temporaria, Bufo bufo (Anuca) (in collaboration with Miss L. V. BER- DYSHEVA and Mrs. L. N. MARKOVA) BYCZKOWSKA (SMYK), Mrs. W. Dr. — Dept. of Comp. Anat., ul Krupnicza 50, KRA- KOW, Poland BYLINA (KUI^SKA), Mrs. A. mgr.Sci. — Veter. Inst, of Histol. and Embryol., High School of Agric, Grochowska 272, WARSZAWA, Poland a Histochemical studies on differentiation of metanephros. Sus domestica (Artiodacfyla) CAHN, R. D. Dr. — Dept. of Zool., Univ. of Washington, SEATTLE, Wash. 98105, U.S.A. CAIRNS, J. M. Ph.D. — Springville Labs, Roswell Park Memorial Inst., SPRINGVILLE. N.Y. 14141. U.S.A. a Control of growth and morphogenesis in limb buds. Gallus domesficus, Cofurnix coturnix, Anas spec, Cairina moschata (Aves) CALLEBAUT, M. M.D. — Dept. de Radiobiol., Centre d'Etude de I'Energie Nucleaire, MOL, Belgium a Incorporation of H^-DNA and H^-thymidine in the embryonic ovaries and testes in vivo or in vitro. Gallus domesficus (Aves), Mus musculus (Rodentia) • CAMBAR, R. Dr., Prof. — Lab. de Biol, anim., Fac. des Sci. de Bordeaux, 351 Cours de la Liberation, 33-TALENCE, France a Etude descriptive et experimental de la morphogenese du mesonephros. Rana spec, Alytes spec, Discoglossus spec, Xenopus spec. (Anura) h Etude experimental de la morphogenese du tube digestif et des glandes annexes. (Anura) c Involution ou transformation de I'appareil excreteur pendant la metamorphose. (Anura) d Rapports entre I'appareil genital et I'appareil excreteur. (Anura) e Recherches descriptives sur le developpement. Gambusia spec. (Teleostei) f Ultrastructure du pronephros et du mesonephros. (Anura) g Differenciation sexuelle. (Anura) h Ultrastructure des formations calcaires animales. (Protozoa; Mollusca) CAMERON. I. L. Ph.D. — Dept. of Anat.. Upstate Med. Center, State Univ. of New York, SYRACUSE. N.Y. 13210. U.S.A. a Biochemical and morphological correlates of cell differentiation in polymorphic forms. (Ciliata) b Cell differentiation in adult tissues. Mus musculus (Rodentia) CAMEY. Miss T. B.Sc — Inst, de Biol. Geral. Fac. de Filos., Univ. de Minas Gerais. Rua Carangola 288, Caixa Postal 253. BELO HORIZONTE, Brasil — temporarily: Zool. Lab., Univ. of Utrecht, Janskerkhof 3. UTRECHT, Netherlands a General embryology. Austcalorbis glabratus, Limnaea stagnalis (Pulmonata, Gastropoda) b Determination of DNA in the nuclei of blastomeres (Feulgen and cytophotometry). (Pulmonata, Gastropoda) CAMOSSO, Miss M. E. ScDr. — Inst, of human Anat.. Fac. of Med.. Policlinico. EARL Italy a Analysis of the morphogenesis of the wing. Gallus domesticus (Aves) h Nerve patterns in experimentally duplicated limbs. Gallus domesficus (Aves) CAMPBELL, T. C. Ph.D. — M.R.C. Epigenet. Res. Group, Inst, of Anim. Genet., King's Buildings, West Mains Road. EDINBURGH 9. Scotland, U.K. a Antigenic studies of lens regeneration. Xenopus taevis, Triturus alpesfris (Amphibia) (in collaboration with D. E. S. TRUMAN) b Regulatory mechanisms in lens regeneration. Xenopus laevis (Anura) c Metabolism (immunochemistry) and regulatory mechanisms in lens development. Xenopus laevis (Anura), Gallus domesticus (Aves) (in collaboration with Mrs. R. M. CLAYTON and D. E. S. TRUMAN) d Studies of mutants affecting the eye and lens. Mus musculus (Rodentia) (in collaboration with Mrs. R. M. CLAYTON) e Immunochemical studies of retina and eye-cup. (Amphibia) (in collaboration with Mrs. R. M. CLAYTON) • CAMPENHOUT. E. van Dr., Prof. — Inst. d'Anat.. Univ. de Louvain, 12 Minderbroeder- str., LOUVAIN. Belgique CANDIOLLO, L. Lib.Doc — 1st. di Anat. Umana Normale della Univ., Fac. Med. e Chir., Corso M. D'Azeglio 52. 10126 TORINO. Italia a Fine structure of neuroblasts in embryos of different stages. Gallus domesticus (Aves) h Thf morphogenesis of the lacertus fibrosus. (Mammalia), Homo sapiens (Primates) CANTELL, C.-E. Fil.mag. — Zool. Inst.. Univ. of Uppsala. Villavagen 9, UPPSALA, Sweden a Larval development. (Heteronemertini) CANTING, D. M.D. — 1st. di Istol. ed Embriol. Gener., Univ. di Torino, Corso M. D'Azeg- lio 52. 10126 TORINO, Italia 28 a The development of Auerbach's and Meissner's plexus (silver staining, histochemistry, electron microscopy). Oryctolagus cuniculus (Lagomorpha), Cavia cobaga, Rattus nocue- gicus (Rodentia) b The development of Remak's ganglion (histochemistry and electron microscopy of developing neuroblasts and synapses). Gallus domesticus (Aves) CAPANNA, E. Dott.Sci.Nat. — 1st. di Anat. Comp. "Battista Grassi", Fac. di Sci., Univ. di Roma. Via A. Borelli 50. ROMA. Italia CAPKOVA (HRUBA). Mrs. A. M.D. — Embryol. Lab.. Inst, for the Care of Mother and Child, nabr. K. Marxe 157, PRAHA-Podoli. Czechoslovakia a Metabolism of glucose in the fetoplacental unit. Homo sapiens (Primates) CAPUANO. G. — Lab. d'Anat. Norm., Fac. Mixte de Med. et de Pharm. de Rouen, 41 Rue St. Girardin, 76-ROUEN, France a Developmental anatomy of pancreas and biliary ducts. Rattus norvegicus (Rodentia) CARELL, E. F. Ph.D. — Dept. of Biol., Univ. of Pittsburgh. PITTSBURGH, Pa. 15213, U.S.A. a Effect of light and chemicals on the development of chloroplasts. Euglena gracilis (Phytomastigina) CARINCI. P. M.D., Prof. — Inst, of Histol. and Gener. Embryol., Univ. of Bologna, Via Belmeloro 8, BOLOGNA, Italia a Histochemistry of embryonic brain. Gallus domesticus (Aves) b Yolk composition during incubation. Gallus domesticus (Aves) CARLSON, B. M. M.D., Ph.D. — Dept. of Anat., Med. School, Univ. of Michigan, East Med. Bldg., ANN ARBOR, Mich. 48104, U.S.A. a Effect of actinomycin D upon forelimb regeneration in the adult animal. Triturus virides- cens (Urodela) b Induction of supernumerary limbs in the adult animal by means of tissue implants subjected to various experimental alterations. Triturus viridescens (Urodela) c Effects of various types of implanted tissues upon wound healing and regeneration in amputated forelimbs of the adult animal. Rana pipiens (Anura) d Studies of a method for the stimulation of regeneration of entirely removed skeletal muscles by means of minced autografts. Rana pipiens (Anura), Rattus norvegicus albinus (Rodentia) e Epidermal-mesodermal interactions in regenerating limbs. Ambystoma mexicanum (Uro- dela) CARMONA DE UZCATEGUI, Mrs. M. L. — Catedra de Embriol.. Fac. de Med.. Univ. de Los Andes, MeRIDA, Venezuela a Development of the blood vessels of the face. Homo sapiens (Primates) h Development and functional anatomy of the mammary gland. (Mammalia). Homo sapiens (Primates) c Development of the genital organs. Homo sapiens (Primates) • CASPARI, E. W. Ph.D., Prof. — Dept. of Biol., Coll. of Arts and Sci., Univ. of Rochester. ROCHESTER, N.Y. 14627, U.S.A. CASSAGNE (MeJEAN), Mrs. F. Doct.es Sci. — Lab. de Zool., Fac. des Sci. de Montpel- lier, Place E. Bataillon, 34-MONTPELLIER, France a Developpement embryonnaire et post-embryonnaire. Arrenurus spec. (Hydrachnellae. Acarina, Arachnida) CASTANEDA, M. M.D. — Dept. of Devel. Biol., Div. of Biol.. California Inst, of Technol- ogy, PASADENA, Calif. 91109, U.S.A. a Protein synthesis in marine embryos. ( Echinodermata) CASTELLANI (CERESA), Mrs. L. Dr.biol.sci. — Catt. di Embriol. e Morfol. sperim.. Univ. di Milano, Via Celoria 10, MILANO, Italia CASTIGLI (PITOTTI), Mrs. M. Dott., Prof. — 1st. di Zool. Gener.. Fac. di Sci. Agraria. Univ. di Perugia, S. Pietro, PERUGIA, Italia a Natura della gastrulazione senza segmentazione. Petromyzon fluviatilis (Cyclostomafa) b Azione e reazione nella metamorfosi. Bufo vulgaris (Anura) c Morfogenesi proteica. d Rigenerazione e determinazione del sesso. e Determinazione del sesso e delle caste. Apis mellifica (Hymenoptera) CASTON. J. D. Ph.D. — Dept. of Anat., Developm. Biol. Center, Western Reserve Univ. School of Med., 2127 Cornell Road. CLEVELAND, Ohio 44106, U.S.A. a Nucleic acids and protein synthesis during development (ribsomes). Rana pipiens, Xenopus taevis (Anura) CASTRO-ROMERO, J. M. Ph.D., M.D., Prof. — Dept. de Anat. y Embriol.. Fac. de Med.. Univ. de Salamanca, SALAMANCA, Spain a Immunochemical analysis of postnatal lens differentiation under experimental conditions. Gallus domesticus (Aves) GATHER, J. N. Ph.D., Prof. — Dept. of Zool., Univ. of Michigan, ANN ARBOR, Mich. 48104. U.S.A. a The differentiation of the shell gland. Ilyanassa obsolefa and other Gastropoda and Pelecypoda (Mollusca) 29 CAUNA, N. D.Sc, M.D., Prof. — Dept. of Anat. and Cell Biol., School of Med., Univ. of Pittsburgh, PITTSBURGH, Pa. 15213, U.S.A. a Development of peripheral receptor organs (neurohistological, histochemical and electron- microscopical studies). Homo sapiens and other spp. (Mammalia) GAUNTER (DEVIS), Mrs. R. J. M.Sc — Dept. of Zool.. Univ. of the Witwatersrand, Milner Park, JOHANNESBURG, S. Africa a An electron microscopic study of development. (Ascidiae) h An electron microscopic study of differentiating ectoderm. Rana angolensis (Anura) CAVALLIN (THOMAS), Mrs. M. Lic.es Sci. — Lab. de Zool. exper.. Fac. des Sci. de Bordeaux, 40 rue Lamartine, TALENGE (Gironde), France a Recherches descriptives et experimentales sur la morphogenese de I'appareil genital. Carausius spec. (Orthoptera) GAZAUX, Gl. Dr.en Biol.Anim. — Inst, de Biol. Marine, Fac. des Sci., Univ. de Bordeaux, 2 rue du Professeur Jolyet, 33-ARGAGHON, France a Larval development from egg to metamorphosis and beyond (artificial fertilization, rearing in the laboratory). (Polychaeta) GECGARINI, G. Ph.D. — 1st. di Anat. Gomp., Fac. di Sci., Univ. di Palermo, Via Archirafi 22, PALERMO, Italia a Soluble RNA charging capacity. Paracenfrotus lividus (Echinoidea) GEDARD (WILLSTAETTER), Mrs. L. M.D., Ph.D. — Lab. de Ghimie Hormonale. Mater- nite de Port-Royal, 121 Bd. de Port-Royal, PARIS XI Ve, France a Biosynthesis and metabolism of steroids in the placenta perfused in vitro. Homo sapiens (Primates) b Biosynthesis of steroids in organotypic cultures of immature gonads. Gallus domesticus (Aves) GENTER, Mrs. E. M. Ph.D. — Dept. of Anat., School of Med., Stanford Univ., STAN- FORD, GaHf. 94305, U.S.A. a Developmental genetics of mutations involving abnormal development of limbs, tail, and neural tube. Mus musculus (Rodentia) GERBELLE, J. G. — Lab. de Physiol, gener., Fac. des Sci. de Bordeaux, 40 Rue Lamartine, TALENGE (Gironde), France a Development of neuromuscular system (action potentials; establishment of first reflex arc). Rattus spec, Cavia spec. (Rodentia), Oryctolagus spec. (Lagomorpha) GHAKKO. T. V. M.Sc. — Dept. of Zool., M.S. Univ. of Baroda, BARODA 2, India a Tail regeneration in the adult. Hemidactylus flaviviridis (Lacertilia) GHAKRAVARTY. A. M.Sc. — Dept. of Zool., Presidency Goll., GALGUTTA 12, West Bengal, India GHALLIGE, G. E. Ph.D., Prof. — Dept. of Physics, Fac. of Arts and Sci., The Univ. of Galgary, GALGARY, Alta., Ganada a Electron microscopy of the heart in development. Mus musculus (Rodentia), Oryctolagus cuniculus (Lagomorpha) GHALOUPKA, Z. MUDr. — Inst, of Pathophysiol., Med. Fac, Gharles Univ., Lidicka 1. PLZEfi, Gzechoslovakia a The development of bioelectrical activity of the brain. Rattus norvegicus, Cavia porcellus (Rodentia), Oryctolagus cuniculus (Lagomorpha) GHAMBERLAIN, J. G. Ph.D. — Dept. of Anat., Univ. of Galifornia School of Med.. SAN FRANGISGO, Galif. 94122, U.S.A. a Effects of vitamin deficiencies during pregnancy utilizing specific antimetabolites. Rattus rattus (Rodentia) h Pathogenesis of experimentally induced congenital hydrocephalus and cleft palate: 6-amino- nicotinamide injected during pregnancy. Rattus rattus (Rodentia) GHAMBOLLE, P. Dr.en Biol.anim. — Lab. de Biol, anim., Fac des Sci. de Bordeaux, 351 Gours de la Liberation, 33-TALENGE, France a Etude de la gestation. Gambusia spec. (Poecilidae, Teleostei) b Etude du developpement in vitro. Gambusia spec. (Poecilidae, Teleostei) c Etude de I'ultrastructure des oeufs. Gambusia spec. (Poecilidae, Teleostei) GHANDEBOIS, Miss R. Dr., Prof. — Lab. de Biol. Anim.. G.P.E.M. 1 et 2, Fac. des Sci., Place Victor Hugo, MARSEILLE 3e, France • GHANG, G. Y. Ph.D. — Inst, of Zool., Acad. Sinica, Haitien, PEKING (53), Ghina (via Hong-Kong) GHANTURISHVILI, P. S. Dr.biol.sci., Prof. — Dept. of Anim. Embryol., Inst, of Zool., Acad, of Sci. of the Georgian S.S.R., TBILISI, U.S.S.R. • GHARNIAUX (GOTTON), Mrs. H. Dr. es Sci., Prof. — Lab. dEvolution des Etres Organises, Fac. des Sci., 105 Bd. Raspail, PARIS 6e, France — Lab. de Genet. Evolutive, G.N.R.S., 91-GIF-sur-YVETTE (Essonne), France a Gontrole hormonal de la differenciation sexuelle; la glande androgene. (Malacosfraca. Crustacea) b Gontrole endocrine de I'hermaphrodisme proterandrique. Pandalus borealis, Lysmata seticaudata (Decapoda natantia, Crustacea) c Recherches sur I'autodifferenciation ovarienne. (Malacosfraca, Crustacea) (en collabora- 30 tion avec Mrs. J. BERREUR (BONNENFANT) et Mrs. M. C. FRIED (MONTAU- FIER) ) d Recherches sur la secretion d'hormone femelle par le testicule apres inversion experimen- tale en ovaire. (Talitridac, Amphipoda, Crustacea) c Recherches sur la nature chimique de Ihormone androgene. Caccimis maenas (Decapoda, Crustacea) • CHASE, H. B. Ph.D.. Prof. — Dept. of Biol., Brown Univ., PROVIDENCE, R.I. 02912. U.S.A. CHATTERJEE, S. M.Sc. — Dept. of Zool., Presidency Coll., CALCUTTA 12, West Bengal, India CHAYTOR, D. E. B. Ph.D. — Dept. of Zool., Njala Univ. Coll., MANO, Sierra Leone, W.Africa CHEN, L. T. B.Sc. — Dept. of Zool., Fac. of Sci., Univ. of Alberta, EDMONTON, Alta., Canada a Cell degeneration and the development of lymphoid primordia (embryos of 4-14 days of incubation; histochemistry, electron microscopy). Callus gallus (Aves) • CHEN, P. S. Dr.Phil., Prof . — Zool.-vergl.Anat. Inst., Naturwiss. Fak., Univ. Zurich, Kunstlergasse 16, 8006-ZURICH, Schweiz CHENEY, R. H. Sc.D., Prof. — Dept. of Biol., Long Island Univ., Flatbush 6 DeKalb Aves, BROOKLYN, N.Y. 11201, U.S.A. a Retardation effect of dimethylated xanthines on development. Arbacia punctulata (Echinoi- dea) b Theophylline, theobromine, and caffeine effects on fecundity and development. Rattus norvegicus (Rodentia) c Effect of di- and trimethylated xanthines on root tip growth. Allium spec. (Liliaceae) d Effect of methylated xanthines on the oxygen consumption of the fertilized egg and early embryology. Arbacia punctulata (Echinoidea) e Effect of x-ray and ultra-violet irradiation on development of methylated xanthine-treated eggs. Arbacia punctulata (Echinoidea) f Effect of caffeine on development. Rana pipiens (Anura) g Developmental effects of chemical inhibitors of protein synthesis. Arbacia punctulata (Echinoidea) CHENG, Th. C. Ph.D., Prof. — Dept. of Zool., Univ. of Hawaii, 2538 The Mall, HONO- LULU, Hawaii 96822, U.S.A. a Morphogenesis, organogenesis and histochemistry of larval stages of digenetic forms. Philophthalmus gralli, Fasciola gigantica (Trematoda) b Developmental pathology in animals parasitized by larval trematodes and nematodes. (Mollusca) CHEVALLIER, A. D. Lic.es Sci. — Lab. de Zool., Fac. des Sci. de Grenoble, Domaine Universitaire, 38-SAINT-MARTIN-d'HERES. France a Differentiation, localization and migration of neural crest cells by radioautographic analysis. Gallus domesticus (Aves) CHEVREAU, J. P. Dr.en Med. — Lab. d'Histol.-Embryol. B, Fac. de Med. de Paris, 45 Rue des Sts.Peres, PARIS Vie, France a Postnatal development of cerebral cortex. Lepus cuniculus (Lagomorpha) b Myelinisation of brain. Lepus cuniculus (Lagomorpha) CHEVREMONT, M. J. J. Dr.hon.c. Prof. — Inst. d'Histol., Univ. de Liege, 20 Rue de Pit- teurs, LIEGE, Belgique CHIARODO, A. J. Ph.D. — Dept. of Biol., Grad. School of Arts and Sci., Georgetown Univ., WASHINGTON, D.C. 20007, U.S.A. a Neuroembryology (experimental morphology). Sarcophaga bullata (Diptera) CHIBON, P. Dr.es Sci. — Lab. de Zool., Fac. des Sci. de Grenoble, Domaine Universitaire, 38-SAINT-MARTIN-d'HERES, France a Nuclear labelling of embryonic cells (autoradiography). Pleutodeles waltlii, Triturus alpestris (Urodela) b Morphogenetic abilities of the neural crest. Pleurodeles waltlii, Triturus alpestris (Urodela) c Differentiation of neural crest cells. Pleurodeles waltlii. Triturus alpestris (Urodela) • CHIEFFI, G. M.D., Prof. — 1st. di Zool. e Anat. Comp., Fac. di Sci., Univ. degli Studi, Piazza F. Marchetti, CAMERINO, Italia CHINO, H. D.Sc, Prof. — Biol. Inst., Coll. of Gener. Education, Univ. of Tokyo, Komaba, Meguro-ku, TOKYO, Japan a Lipid transport and metamorphosis. Bombyx mod (Lepidoptera) CHINOY, Miss N. J. M.Sc. — Dept. of Zool., M.S. Univ. of Baroda, BARODA 2, India a Fat metabolism of embryonic muscle cells cultured in vitro. Columba livia, Gallus domesticus (Aves) CHITNIS, P. S. Ph.D. — Cell Research Lab., Dept. of Zool., Nowrosjee Wadia Coll., POONA-1, India a A histochemical (qualitative and quantitative) study of phosphohpids and phosphatases in the larval stages. Chrysomia rufifacies (Diptera) (in collaboration with D. N. KAMAT, Kolhapur) 31 b Intra vitam studies on the development and metamorphosis of Malpighian tubules. Chrysomia rafitacies (Diptera) CHOUARD, C. H. — Lab. d'Anat., Fac. de Med., 45 Rue des Sts.Peres, PARIS Vie, France a Developpement des noyaux du faisceau solitaire. Homo sapiens (Primates) CHOWDHURY, J. R. — Chittaranjan Nat. Cancer Research Center, 37 S.P.Mookerjee Rd.. CALCUTTA 26, India • CHUANG HSIAO HUI Dr.rer.nat.habil. — Lab. of Developm. Physiol., Inst, for Exper. Biol.. Acad. Sinica, 320 Yo Yang Rd., SHANGHAI, China CHURCH, R. B. Ph.D., Prof. — Dept. of Biol., Fac. of Sci., Univ. of Calgary, CALGARY. Alta., Canada a Study of messenger RNA synthesis in fetal and regenerating liver by RNA/DNA molec- ular hybridization. Mas musculus (Rodenfia) b Site of hormone action on DNA transcription and RNA translation at various stages of development. Oryctolagus cuniculus (Lagomorpha) c Messenger RNA synthesis during development. Drosophila spec. (Diptera) • CICADA (LEONARDI), Mrs. M. Dott.Sci.Biol. — 1st. di Zool., Univ. di Milano, Via Celoria 10, MILANO, Italia CIHAK, R. MUDr. — Dept. of Anat.. Charles Univ.. U nemocnice 3, PRAHA 2. Czechoslo- vakia a Prenatal development ot muscles. Homo sapiens (Primates) CLAIRAMBAULT, P. Dr. de 3eme Cycle — Lab. d'Anat. comp., Fac. des Sci., 7 Quai St. Bernard, PARIS Ve, France a Etude architectonique de I'encephale au cours du developpement; recherche des causes de la morphogenese. Discoglossus pictus, Rana pipiens, Bufo regularis, Rhacophorus spec, Nectophrynoides occidentalis (Anuta), Pleurodeles waltlii (Urodela) • CLAVERT, J. M. J. Dr.es Sci., Prof. — Inst. d'Embryol., Fac. de Med., 1 Place de I'Hopi- tal, STRASBOURG, France a Recherches sur le determinisme de la symetrie bilaterale. (Pisces; Reptilia; Aves) b Chimioteratogenese (cortisone, antimitotiques). (Aves; Mammalia) CLAXTON, J. H. B.Sc. — Dept. of Anat., Fac. of Rural Sci., Univ. of New England, AR- MIDALE, N.S.W., Australia • CLAYTON (FREEDMAN), Mrs. R. M. M.A. — Inst, of Anim. Genet., King's Buildings, West Mains Rd., EDINBURGH 9. Scotland, U.K. a Metabolic and immunochemical studies of regulation and structure of lens proteins and lens development. Xenopus laevis (Anura), Gallus domesticus (Aves) (in collaboration with J. C. CAMPBELL and D. E. S. TRUMAN) b Immunochemical studies of retina and eye cup. Xenopus laevis (Anura) (in collaboration with J. C. CAMPBELL) c Studies of mutants affecting the eye and lens. Mus musculus (Rodentia) (in collaboration with J. C. CAMPBELL) CLEGG, E. J. M.D., Ph.D. — Dept. of Human Biol, and Anat., Univ. of Sheffield, SHEF- FIELD, England a Effect of hypoxia on somatic and reproductive growth. (Mammalia) h Growth patterns in the accessory reproductive organs. (Mammalia) CLEGG. J. S. Ph.D., Prof. — Dept. of Biol.. Univ. of Miami, CORAL GABLES, Fla. 33124, U.S.A. a Biochemical and physiological studies on cryptobiosis in the embryo (major emphasis on metabolism of trehalose, glycerol and other carbohydrates). Artemia salina (Anostraca) h Protein and nucleic acid metabolism during embryonic development (major emphasis on in vitro protein synthesizing system, analysis of polysome formation and breakdown and synthesis of various RNA species). Artemia salina (Anostraca) • CLEMENT, A. C. Ph.D.. Prof. — Dept. of Biol.. Emory Univ.. ATLANTA, Ga. 30322, U.S.A. a Experimental analysis of early embryonic determination. Ilyanassa obsoleta (Gastropoda) b Cytochemical and physiological studies of early development. Ilyanassa obsoleta (Gastro- poda) CLERMONT. Y. Ph.D.. Prof. — Dept. of Anat.. McGill Univ.. MONTREAL 2, Que.. Canada a Growth and renewal of the spermatogonial population in prepuberal animals. Ratfus norvegicus (Rodentia) (in collaboration with Miss C. HUCKINS) CLEWE. Th. H. M.D. — Delta Region. Primate Research Center. Tulane Univ.. COVING- TON. La. 70433. U.S.A. a Physiology of gamete and zygote transport in the female. (Mammalia) CLULOW. F. — Dept. of Biol.. Univ. of Ottawa. OTTAWA, Ont.. Canada CLUTTER. Miss M. E. Ph.D. — Dept. of Biol., Yale Univ., NEW HAVEN, Conn. 06520, U.S.A. a Histodifferentiation in tissue cultures. Nicotiana tabacum (Dicotyledoneae) b Meiosis and spore differentiation. Osmunda cinnamomea (Pilicinae) COALSON, R. E. Ph.D.. Prof. — Dept. of Anat.. School of Med.. Univ. of Oklahoma. 800 Northeast 13th St., OKLAHOMA-City, Okla. 73104, U.S.A. 32 a Studies on insulin in the developing pancreas. Gallus domesticus, Columba livia (Aves), Rattiis norveyicus, Cavia cobaya (Rodentia) COCK. A. G. Ph.D. — Dept. of Zool., Univ. of Southampton, SOUTHAMPTON. Hamp- shire, England a Developmental genetics of body shape and size. Artemia salina (Anostraca, Crustacea), Gallus gallus (Aves) COETZEE, Miss F. C. B.Sc. — Dept. of Zool., Univ. of Pretoria, Hillcrest. PRETORIA, S.Africa a Antero-posterior and medio-lateral gradients in induction capacity of the archenteron roof of the early neurula. Xenopus laevis (Anura) COHEN, Ph. P. Ph.D., M.D., Prof. — Dept. of Physiol. Chem., Univ. of Wisconsin, Med. Scis. Bldg., MADISON, Wis. 53706, U.S.A. a Biochemical aspects of differentiation in liver during metamorphosis (enzyme changes and induction; RNA, DNA and histone changes; biochemical mechanism of thyroxine action as an inducer). Rana catesbeiana (Anura) • COHEN, S. Ph.D.. Prof. — Dept. of Biochem.. School of Med., Vanderbilt Univ., NASH- VILLE, Tenn. 37203, U.S.A. COHN, S. A. Ph.D., Prof. — Dept. of Anat., School of Basic Med. Sci., Med. Units, Univ. of Tennessee, 62 S. Dunlap St., MEMPHIS. Tenn. 38103, U.S.A. a The development of glands of ectodermal origin. Mus musculus (Rodentia) h Studies of tooth development. Mus musculus (Rodentia) c Histologic and histochemical studies of the periodontium. Mus musculus (Rodentia) COLEMAN, R. D. D.D.S.. Prof. — Dept. of Dental Anat., School of Dentistry, Univ. of California Med. Center, 3rd and Parnassus Aves., SAN FRANCISCO, Calif. 94122, U.S.A. a The possible role of sulfated mucopolysaccharides in normal and cleft palate development by employing radioactive sulfur (palatal defects induced by a transitory maternal defic- iency of folic acid) . Rattus noruegicus (Rodentia) h A study of the uptake of tritiated thymidine in normal and cleft palate development (palatal defects induced by a transitory maternal deficiency of folic acid). Rattus norue- gicus (Rodentia) COLLE (VANDEVELDE), Mrs. A. M.D. — Lab. of Anat., Fac. of Med., Univ. of Gent. Ledeganckstraat 35, GENT, Belgium a Development of blood and blood-vessels. Gobius niger, G. paganellus, Lepadogasfer candollii (Pecciformes) , Syngnathus typhle, Nerophis ophidion (Syngnathiformes, Tele- ostei) b Development of pharynx. Brachydanio rerio (Cyprinifocmes), Betta splendens (Perci- formes, Teleostei) c Foetal endocrinology by means of organotypical culture. Mus musculus (Rodentia) COLLENOT, A. Dr.es Sci. — Lab. d'EmbryoL, Fac. des Sci. de Paris, 9 quai Saint-Bernard, PARIS Ve, France a Ontogenese sexuelle. (Amphibia; Mammalia) h Steroides sexuels et ontogenese sexuelle (histochimie). (Amphibia; Mammalia) c Genes lethaux et developpement. Pleurodeles waltlii (Urodela) COLLIER. J. R. Ph.D., Prof . — Dept. of Biol., Brooklyn Coll., Bedford Ave. & Ave. H, BROOKLYN, N.Y. 11210. U.S.A. a Nucleic acid and protein synthesis of the embryo, with particular interest in the trans- cription and regulation of the genome during embryogenesis: 1. RNA and protein synthesis during early development; 2. the role of DNA-dependent RNA synthesis in embryogenesis. Ilyanassa obsoleta (Gastropoda) COLLIN, J.-P. D.E.S. — Lab. de Biol. Anim., 1 Avenue Vercingetorix, 63 CLERMONT- FERRAND, France a Developpement de I'epiphyse (microscopie electronique). (Reptilia; Aves; Mammalia) COLLINI, Miss R. Dr. — 1st. di Zool., Univ. di Milano, Via Celoria 10, MILANO, Italia COLLINS. M. F. Ph.D. — Dept. of Zool., The Univ. of Texas. AUSTIN, Tex. 78712, U.S.A. a Cellular surface properties and morphogenetic movements. Gallus domesticus (Aves) • COLOMBO, G. Dr.biol.sc, Prof. — 1st. di Istol. ed Embriol.. Fac. di Sci.. Univ. di Perugia. Via A. Fabretti, PERUGIA, Italia COLOMBO, L. Dr.biol.sci. — 1st. di Zool., Anat. comp. e Genet., Fac. di Sci.. Via Loredan 10, PADOVA. Italia • COLWIN, A. L. Ph.D.. Prof. — Dept. of Biol.. Queens Coll.. FLUSHING, L.I., N.Y. 11367, U.S.A. a Fertilization: sperm-egg association and zygote formation; cell contact and adhesion; fusion of plasma membranes; egg envelopes; lytic changes; cortical changes; sperm- blastomere association (living material and electron microscope studies). (Enteropneusta; Echinodermata; Annelida, etc.) (in collaboration with Mrs. L. H. COLWIN) • COLWIN, Mrs. L. HUNTER Ph.D., Prof. — Dept. of Biol.. Queens Coll.. FLUSHING, L.I.. N.Y. 11367. U.S.A. 33 a Fertilization: sperm-egg association and zygote formation; cell contact and adhesion; fusion of plasma membranes; egg envelopes; lytic changes; cortical changes; sperm- blastomere assication (living material and electron microscope studies). (Enteropneusta, Echinodecmata; Annelida, etc.) (in collaboration with A. L. COLWIN) CONKLIN, J. L. Ph.D., Prof. — Dept. of Anat., Med. School, Univ. of Michigan, East Med. Bldg., ANN ARBOR. Mich. 48104, U.S.A. a Studies of protein development, notably dehydrogenase isozymes, by electrophoretic and cytochemical procedures. CONRAD, G. W. M.S. — Dept. of Biol., Yale Univ., NEW HAVEN. Conn. 06520, U.S.A. CONTI, G. M.D., Prof. — Inst, of Histol. and Gener. Embryol., Univ.-Perolles, 1700 FRI- BOURG, Suisse a Teratogenetic action of 5-fluorouracil and ubiquinone in o v o and in vitro. Gallus domesticus (Aves) CONTOLI. L. Dr.Biol.Sci. — 1st. di Zool. dell'Univ., Viale Regina Elena 324, (al Policli- nico), ROMA, Italia a Fertilization and embryonic development. Paracentrotus lividus (Echinoidea) COON, H. G. Ph.D. — Dept. of Embryol., Carnegie Inst, of Washington, 115 W. University Parkway, BALTIMORE, Md. 21210, U.S.A. a Cloning of early and differentiated cells; studies on the stability of characteristics of populations derived from single embryonic cells. Gallus domesticus (Aves) CORLISS, C. E. Ph.D., Prof. — Dept. of Anat., School of Basic Med. Sci., Med. Units, Univ. of Tennessee, 62 S. Dunlap St., MEMPHIS, Tenn. 38103, U.S.A. a Radioautographic studies of nuclear migration in neural epithelium of normal and teratogen- treated embryos. Gallus domesticus (Aves) CORNEC, J. P. — Lab. de Biol. Anim. C.P.E.M., Fac. des Sci., 1 Place Victor-Hugo. MAR- SEILLE 3e, France a Analyse des facteurs qui determinent I'absence de regeneration. (Hirudinea. Annelida) • CORNER, G. W. M.D., D.Sc, Prof . — American Philosophical Soc, 104 South 5th St., PHILADELPHIA, Pa. 19106. U.S.A. CORNER, M. A. Ph.D. — Netherlands Central Inst, for Brain Research. Ydijk 28. AM- STERDAM-O., Netherlands a Development of central nervous system function (electrophysiological techniques). (Aves) 1. Electroencephalogram and its relation to embryonic behavior. 2. Effect on brain development of metabolic inhibitors. 3. Neurological bases for the maturation of spontaneous and reflex patterns of movement. 4. Development of susceptibility to "psychopharmacological" agents. CORSIN. Miss J. Lic.es Sci. — Lab. d'Anat. comp., Fac. des Sci.. 7 Quai St. Bernard. 75- PARIS Ve, France a Developpement du crane osseux (teratogenese et culture in vitro). Pleurodeles waltlii (Urodela) COSTANZO. G. — 1st. Idrobiol. e Pescicoltura, Univ. di Messina, Via dei Verdi 75, MESSI- NA. Italia a Ovogenesi. (Arthropoda; MoUusca; Echinodermafa) b Ultrastruttura dell'apparato nucleolare degli ovociti. Patella coerulea (Prosobranchia. Gastropoda) c Sviluppo morfologico (stadi adulti e alcuni stadi copepodiformi). Lichomolgus canui (Copepoda, Crustacea) d Allevamento in acquario dall'uovo embrionato alia stadio adulto. Lichomolgus canui (Copepoda, Crustacea) • COSTELLO. D. P. Ph.D.. Prof. — Dept. of Zool., Univ. of North Carolina, CHAPEL HILL, N.C. 27515, U.S.A. COSTLOW. J. D., Jr. Ph.D. — Marine Lab., Duke Univ.. BEAUFORT. N.C. 28516. and Dept. of Zool.. Duke Univ.. DURHAM, N.C. 27706, U.S.A. COULOMBRE, A. J. Ph.D. — Lab. of Developm. Biol., Sect, on Exper. Embryol., Natl. Inst, of Child Health and Human Developm.. Natl. Inst, of Health, BETHESDA, Md. 20014, U.S.A. a Growth and morphogenesis of the eye. Gallus domesticus (Aves) (in collaboration with Mrs. J. L. COULOMBRE) b Pharmacology of the embryo. Gallus domesticus (Aves) COULOMBRE (LACY), Mrs. J. L. B.S. — Lab. of Developm. Biol., Sect, on Exper. Em- bryol.. Natl. Inst, of Child Health and Human Developm.. Natl. Inst, of Health. BETHES- DA, Md. 20014. U.S.A. a Growth and morphogenesis of the eye. Gallus domesticus (Aves) (in collaboration with A. J. COULOMBRE) COUNCE (NICKLAS), Mrs. S. J. Ph.D. — Dept. of Zool., Duke Univ., DURHAM. N.C. 27706. U.S.A. a Embryo culture in vitro; experimental analysis of embryogenesis; developmental genetics and physiology; cytogenetics, including puffing patterns at various developmental stages in different tissues. Miastor spec. (Cecidomyidae, Diptera) 34 b Genetics of egg structure (inheritance of egg pattern in different strains and species). Drosophila hydei and relatives, D. melanogastcr (Dipfera) c Morphological and physiological effects of female-sterility genes. Drosophila hydei and relatives, D. melanogastcr (Dipfera) COUPa R. J. F. Lic.es Sci. — Lab. d'Anat. comp., Fac. des Sci., 7 Quai St. Bernard. PARIS Ve, France a Comportement et devenir — en culture in vitro — de cellules embryonnaires isolees. Discoglossiis pictus, Pleurodeles waltlii (Amphibia), Esox lucius (Teleostei) COUSINEAU. G. H. Dr. — Molecular Biol. Lab., Dept. of Biol., Fac. of Sci.. Montreal Univ., P.O.Box 6128, MONTREAL. P.Q., Canada a Study of the uptake and incorporation of labelled amino acids and pyrimidines into macromolecules of developing eggs, and the effect of actinomycin D, D2O and hexahomo- serine (with emphasis on "incorporation correction", i.e., the percent ratio of incorporation over uptake). Arbacia punctulata. Strong ylocentrotus purpuratus, Lytechynus pictus (Echinoidea) COWAN, W. M. Ph.D., Prof. — Dept. of Anat., Bardeen Med. Labs., Univ. of Wisconsin. MADISON, Wis. 53706, U.S.A. a Experimental studies of the development of the visual system. Gallus domesticus (Aves), Rattus noTvegicus (Rodenfia) h The factors involved in the formation and maintenance of synaptic connections in the central nervous system. Gallus domesticus (Aves), Rattus norvegicus (Rodentia) COWARD, S. J. Ph.D. — Dept. of Zool., Coll. of Arts and Scis.. Univ. of Georgia. ATHENS, Ga. 30601. U.S.A. a Dissociation and reaggregation of cells in culture. Dugesia dorofocephala, Bdelloura Candida (Turbellaria) h Surface/volume relationships and physiological gradients (kinetic studies of macromolecule precursors). Dugesia dorotocephala (Turbellaria) c Differential and sequential gene activation during regeneration (actinomycin D; DNA- RNA hybridization). Dugesia dorotocephala (Turbellaria) COZETTE, P. — Lab. d'Embryol.. Fac. de Med.. Univ. de Nancy. 31 rue Lionnois. 54 NANCY, France a Action de certains neuroleptiques sur le developpement foetal et post-natal. (Mammalia) (en collaboration avec A. DOLLANDER et Miss. M.-F. ROBERT) CRACIUN. Mrs. O. L.Sc — Cat. de Biol.. Inst. Medico-Farmaceutic. Str. Pasteur 6. CLUJ. Rumania a Influence de la temperature d'incubation sur I'infrastructure de I'embryon. Gallus spec. (Aves) h Affrontation d'organes embryonnaires in vitro. Mus rattus (Rodentia) CRAIG, D. A. B.Sc.(Hons) —Dept. of Zool., Univ. of Canterbury, Private Bag, CHRIST- CHURCH, New Zealand a Descriptive embryology. Neocurupira chiltoni (Nematocera, Dipfera) CRAIGMYLE, M. B. L. M.D. — Dept. of Anat.. Univ. Coll. of South Wales and Mon- mouthshire, CARDIFF, Wales, U.K. CRANE, R. K. Ph.D. — Dept. of Biochem., Med. School. 710 S. Wolcott. CHICAGO 12. 111., U.S.A. CRAWFORD. R. B. Ph.D.. Prof. — Dept. of Biol.. Trinity Coll.. HARTFORD. Conn. 06106, U.S.A. a The relationship of the synthetic pathways of adenosine triphosphate to morphogenesis and differentiation. Fundulus heteroclifus (Teleostei), Amby stoma maculatum (Urodela) b The kinetics of RNA synthesis during early embryogen-sis, studied particularly in relation to energetics metabolism. Fundulus heteroclifus (Teleostei), Ambystoma maculatum (Urodela) c Activation of hexokinase activity in embryos. Ambystoma maculatum (Urodela) d Relationship of free amino acid pool to protein synthesis in embryos. Fundulus heteroclitus (Teleostei), Ambystoma maculatum (Urodela) CRESP, T. Dr. — Lab. de Biol. Anim.. C.P.E.M. 1 et 2, Fac. des Sci.. Place Victor Hugo, MARSEILLE 3e. France CRIPPA, M. M.D. — Lab. di Radiobiol. Anim.. C.N.E.N.. C.S.N.-Casaccia. S. Maria dl Galeria. ROMA. Italia a Cell differentiation and developmental genetics. CRISTEA, Miss M. M.D. — Cat. de Biol.. Inst. Medico-Farmaceutic, Str. Pasteur 6, CLUJ, Rumania a Influence de I'alcool ethylique sur le developpement du foie embryonnaire (histochimie et biochimie). Mus rattus (Rodenfia) • CROISILLE, Y. Dr. — Inst. d'Embryol. et Teratol. exper. du C.N.R.S.. 49 bis Av. de la Belle Gabrielle, 94-NOGENT-sur-MARNE, France — Lab. d'Embryol. exper. du Coll. de France. 1 1 Place M. Berthelot. PARIS Ve, France a Application de methodes immunochimiques a I'etude de I'apparition des constituants specifiques au cours du developpement. Gallus gallus (Aves) 35 b Etude de quelques enzymes (hypoxanthine deshydrogenase, deshydrogenases lactiques) dans les organes de I'adulte et de I'embryon. Gallus gallus (Aves) CROIZAT, B. Dr.3e cycle — Centre de Recherches sur la Nutrition du C.N.R.S., 9 rue Emile. 92 BELLEVUE, France a Metabolism of bile acids in organotypic culture of embryonic liver. Gallus gallus (Aves) CRONE, M. — Finsen Lab., Finsen Inst., Strandboulevarden 49, COPENHAGEN, Denmark • CROWELL, P. S. Ph.D.. Prof. — Dept. of Zool., Indiana Univ., BLOOMINGTON, Ind., U.S.A. CRUZ, A. R. M.D., Ph.D. — Dept. de Morfol. Humana Funcional e Aplicada, Fac. de Med. de Ribeirao Preto, Univ. de Sao Paulo, Caixa Postal 301, SAO PAULO, S.P., Brasil a Histochemistry of developing neurons. (Vertebrata) (in collaboration with R. AZOU- BEL) b Allometric growth of some organs. Rattus rattus (Rodentia) c Nuclear size classes in nerve cells. Mus musculus (Rodentia) d Allometric growth of thyroidectomized animals. Rattus rattus (Rodentia) (in collabora- tion with S. lUCIF) e Allometric growth of the eye in hemispherectomized animals. Rattus rattus (Rodentia) (in collaboration with R. AZOUBEL and S. lUCIF) f Effect of hemispherectomy on the thyroid gland. Rattus rattus (Rodentia) (in collaboration with R. AZOUBEL and S. lUCIF) CRUZ (DE LOSADA), Mrs. M. V. de la M.D. — Dept. de Embriol.. Inst. Nac. de Cardiol., Ave. Cuauhtemoc nr. 300, MEXICO 7, D.F., Mexico CSABA, G. M.D. — Inst, of Histol. and EmbryoL, Med. Univ., Tiizolto u. 58, BUDAPEST IX, Hungary a Experimental and physiological embryology; teratogenesis. Pleurodeles waltlii, Ambystoma mexicanum (Urodela), Gallus domesticus (Aves), Rattus rattus (Rodentia) CSILLIK, B. M.D., Prof. — Dept. of Anat., Univ. Med. School, SZEGED, Hungary a Submicroscopical analysis of the development of post-synaptic membranes. Mus rattus (Rodentia) (in collaboration with G. KALMAN) b Developmental histochemistry of the cerebellar cortex. Cavia cobaya (Rodentia), Felis catus, Canis iamiliaris (Carnivora) (in collaboration with P. KASA) c Developmental histochemistry of the archicerebellar cortex. Mus rattus (Rodentia) (in collaboration with P. KASA) d Developmental histochemistry of the vegetative ground plexus. Mus rattus (Rodentia) (in collaboration with G. B. KOELLE) e Development of the adrenergic inhibitory terminals in autonomic ganglia: fluorescence microscopy and electron microscopy. Mus rattus (Rodentia) (in collaboration with G. KALMAN and Miss E. KNYIHAR) GUCCI, C. E. M.D. — Pediatric Cardiac Service, Lenox Hill Hosp., 100 East 77th St., NEW YORK, N.Y. 10021, U.S.A. a Developmental anomalies of trunco-conal septation. Homo sapiens (Primates) CUMINGE, Miss D. Lic.es Sci. — Inst. d'Embryol. et Teratol. exper. du C.N.R.S., 49 bis Av. de la Belle Gabrielle, 94-NOGENT-sur MARNE, France a Etude au microscope electronique des associations de cellules cancereuses et d'organes embryonnaires. Gallus gallus (Aves) CUOMO, Miss M. Dr. — 1st. di Biol, gener., Fac. di Med., Univ. di Roma, Viale di Porta Tiburtina 28, ROMA, Italia a Trapianti eterosplastici e xenoplastici negli embrioni. (Amphibia) h Azione delle auxine e di varie sostanze sui meristemi radicali. Vicia [aba CURTIS, A. S. G. Ph.D., Prof. — Dept. of Cell Biol., Univ. of Glasgow, GLASGOW W.2. Scotland. U.K. a Structure and physical chemistry of embryonic cell surfaces. (Vertebrata) h Segregation mechanisms in reaggregates of embryonic cells. (Vertebrata) c Reaction of immunoglobulins with embryonic cell surfaces. (Vertebrata) CURY, G. Agr.Phil., Lic.es Sci. — Lab. d'Embryol., Fac. de Med. Univ. de Nancy, 31 rue Lionnois, 54 NANCY, France a Etude de la cytodifferenciation sanguine in vitro. Gallus domesticus (Aves) CUSIMANO (CAROLLO), Mrs. T. Dr.Sc. — 1st. di Zool., Univ. di Palermo. Via Archirafi 18, 90123 PALERMO. Italia a Embryological research. (Anura) b Action of nucleosides and nucleotides on embryonic development. (Ascidiae) CUTBUSH, G. A. W. B.A. — Dept. of Zool.. Coll. of Sci., Univ. of Western Ontario, LON- DON, Ont., Canada a Effects of cycloheximide on developmental processes. (Teleostei) CZAPSKA (DZIEKANOWSKA), Mrs. D. Ph.D. — Dept. of Gener. Biol., Silesian Acad. of Med., Rokitnica, ZABRZE 8, Poland CZIHAK, G. Dr.phil. — Arbeitsgruppe Biochem. Embryol., Max-Planck-Inst. f. Meeresbiol., Abt. Bauer, Melanchthonstr. 36, 7400-TuBINGEN, Deutsche Bundesrepublik a Molecular biology of early development. Paracentrotus lividus, Psammechinus miliaris (Echinoidea) 36 b Cleavage pattern. Paracentrotus lividus, Psammechinus miliaris (Echinoidea) c Regulation of mitosis. Paracentrotus lividus. Psammechinus miliaris (Echinoidea) CZOtOWSKA, Miss R. K. M.Sc. — Dept. of Zool., Univ. of Warsaw, Krakowskie Przed- miescie 26/28. WARSZAWA 64, Poland — temporarily: Hubrecht Lab. (Internat. Embryol. Inst.), Uppsalalaan 1, Universiteits- centrum ,.De Uithof, UTRECHT, Netherlands a Cytological and experimental studies on the origin of "germinal cytoplasm". Xenopus laevis, Rana tempocaria (Anura) DABAGIAN (ERAMICHEVA). Mrs. N. V. cand.biol.sci. — Dept. of Embryol.. Fac. of Biol.. Moscow Univ., MOSCOW V-234, U.S.S.R. DADONE, L. A. — Cat. "B" de Embriol., Biol, e Histol., Fac. de Cienc. Med., Univ. Nac. de La Plata, 60 y 120, LA PLATA, Argentina a Liver growth control in the embryo by liver tissue growth factors; influence of circadian rhythms. Gallus gallus (Aves) DADOUNE, J. P. Dr.en Med. — Lab. d'Histol. -Embryol. B, Fac. de Med. de Paris, 45 Rue des Sts. Peres, PARIS Vie, France a Analysis of histogenesis in the cerebellum. Mus rattus (Rodentia) DAEMEN. F. J. M. Ph.D. — Dept. of Biochem., Fac. of Med., Univ. of Nijmegen, Kapittel- weg 40. NIJMEGEN, Netherlands a Development of the rhodopsin cycle; rhodopsin. electroretinogram and morphology from birth till maturity. Canis domesficus (Carnivora) (in collaboration with S. L. BONTING) DAHL, E. Prof. — Zootom. Dept.. Zool. Inst., Univ. of Lund, LUND, Sweden DAIKOKU S. M.D., Ph.D., Prof . — Dept. of Anat., School of Med., Tokushima Univ.. TOKUSHIMA, Japan a Experimental embryology of the endocrine organs. Rattus rattus (Rodentia) b Embryology of the motor and sensory nerve terminals. Homo sapiens (Primates) DAILLIE. J. — Section de Biol, generale et appliquee. Fac. des Sci.. Univ. de Lyon, 43, Bd. du 11 Novembre 1918, 69-VILLEURBANNE, France a Physiologie de la glande serigene. Bombyx mori (Lepidoptera) • DALCQ, A. M. M.D., Prof. — Lab. d'Anat. et d'Embryol., Fac. de Med. de I'Univ., 97 Rue aux Laines, BRUXELLES, Belgique DALLMAN, P. R. M.D. — Dept. of Pediatrics, Stanford Univ. School of Med., PALO ALTO, Calif. 94304. U.S.A. a Heme proteins. b Embryonic nutrition (biochemistry). DALTON, H. C. Ph.D.. Prof. — Dept. of Biol., Coll. of Sci., Pennsylvania State Univ., 208 Life Sciences I, UNIVERSITY PARK, Pa. 16802, U.S.A. a Gene control of chromatophore development. Ambystoma mexicanum (Urodela) • D'AMELIO, V. Ph.D. — 1st. di Anat. Comp., Fac. di Sci.. Univ. di Palermo, Via Archi- rafi 22, PALERMO, Italia a Formation of hemoglobin. Gallus spec. (Aves) h Serological studies of subcellular components during liver differentiation. Gallus spec. (Aves) c Antigenic differentiation of red blood cell membrane. Gallus spec. (Aves) d RNA synthesis in embryonic red cells. Gallus spec. (Aves) DAMERON, Miss F. Lic.es Sci. — Inst. d'Embryol. Exper. du Coll. de France et du C.N.R.S., 1 1 Place M. Berthelot, PARIS Ve, France a Morphogenese du poumon par les methodes de dissociation et de reassociation en culture in vitro. Gallus gallus (Aves) • DAN, Mrs. J. C. Ph.D. — Embryol. Sect.. Dept. of Biol., Fac. of Sci., Ochanomizu Univ., Otsuka-machi, Bunkyo-ku, TOKYO, Japan a Electron microscopical observation of acrosome formation and reaction. (Mollusca; Echinodermata) h Sperm entry. (Nereidae, Polychaeta; Mollusca; Asteroidea, Echinodermata) c Nature of vitelline coat of egg. (Asteroidea, Echinodermata) • DAN, K. Ph.D.. Prof. — Embryol. Section, Biol. Dept., Fac. of Sci., Tokyo Metropolitan Univ., 950 1-chome, Fukaza-machi, Setagaya-ku, TOKYO, Japan a Mechanism of cleavage. Triturus spec. (Urodela) b Protein SH in the ova. (Echinoidea) c Lunar periodicity of spawning. Comanthus japonica (Crinoidea) d Size determination of the micromeres. (Echinoidea) D'ANCONA (LUNETTA), Mrs. G. Ph.D. — 1st. di Istol. ed Embriol., Univ. di Palermo, Via Archirafi 18. 90123 PALERMO, Italia a Determinations of enzyme activities during development. (Mollusca; Ascidiae) b Chemical investigations on glycoproteins in embryos. (Mollusca; Ascidiae) DANIEL, J. C, Jr. Ph.D., Prof. — Inst, for Developm. Biol., Univ. of Colorado, BOUL- DER, Colo. 80302, U.S.A. a Culture of embryos. Oryctolagus cuniculus (Lagomorpha) b Regeneration of embryos. Oryctolagus cuniculus (Lagomorpha) 37 c Developmental physiology (embryonic nutrition, delayed implantation and effects of steroids on early development). Oryctolagus cuniculus (Lagomorpha) DANIELI, G. A. Dr.biol.sci. — 1st. di Zool., Anat. comp. e Genet., Fac. di Sci., Via Loredan 10, PADOVA, Italia • DANKMEYER. J. Med.Dr., Prof . — Anat.-Embryol. Lab., Fac. of Med.. State Univ. of Leiden, Boerhaavekwartier, Wassenaarseweg 62, LEIDEN, Netherlands DANNA, T. Ph.D. — 1st. di Zool., Univ. di Palermo, Via Archirafi 18, 90123 PALERMO, Italia a Radioautographic investigations in embryonic development. (Ascidiae) h Microrespirometric investigations in embryonic development. (Ascidiae) c Enzyme activity (ATP-ase) in embryonic development. (Ascidiae) DANNEEL, R. Dr., Prof. — Zool. Inst, der Univ., Poppelsdorfer Schloss, 53 BONN, Deut- sche Bundesrepublik DARLINGTON, D. M.B., Ch.B. — Dept. of Anat.. Med. School. Univ. of Birmingham. Edgbaston. BIRMINGHAM 15, England a The development of the convolutional pattern of the brain and endocranial cast. Mustela fuTO (Cacnivoca) D' ASARO. C. N. Ph.D. — Inst, of Marine Sci.. Univ. of Miami. 1 Rickenbacker Causeway, MIAMI, Fla. 33149, U.S.A. a Developmental morphology of tropical and subtropical forms (embryogenesis and organo- genesis through metamorphosis). Bursa caelata, Distorsio clathrata, Batillacia minima (Gastropoda). Chione cancellata, Codakia orbicularis, Atdna rigida (Lamellibranchiata) DASGUPTA, B. Ph.D.. Prof. — Zool. Dept., Darjeeling Government Coll., DARJEELING, W.Bengal, India a Asexual reproduction and development. Plasmodium spp. (Haemosporidia, Sporozoa) DAVENPORT, R. Ph.D. — Dept. of Zool., Univ. of Illinois, 345 Nat. Hist. Build.. URBA- NA, 111. 61801, U.S.A. a Electrophoretic and immunophoretic analysis of basic proteins during early embryonic development. Strong ylocentrotus pmpuratus, Lyf echinus variegatus (Echinoidea). dona intestinalis, Ascidia nigra (Tunicata) DAVID, G. Dr. en Med., Prof. — Lab. d'Embryol., Fac. de Med., 45 Rue des Sts.Peres, PARIS Vie. France a Facteurs Rhesus. Homo sapiens (Primates) b Incompatibilites foeto-maternelles. Oryctolagus cuniculus, Rattus spec. (Mammalia) DAVID, G B. Ph.D. — Dept. of Biophys., Manhattanville Inst., Columbia Univ., 632 West 125th St., NEW YORK, N.Y. 10027, U.S.A. a Mechanisms of cellular motility in fibroblasts, myoblasts and cells of nervous origin, b Studies of enzyme localization in living tissue cells. c Biophysical studies of the origin of contraction mechanisms in myoblasts, d Studies of regeneration of nervous tissues in vivo and in vitro. DAVID (BOGLI), Mrs. D. Lic.es Sci. — Lab. de Biol. Anim., 1 Ave. Vercingetorix, 63 CLERMONT-FERRAND, France ^..^,,^^., DAVIDENAS, J. A. B.Sc — Dept. of Zool., Fac. of Sci.. Univ. of Alberta, EDMONTON, Alta., Canada a The comparative distribution of histocompatibility and non-histocompatibility isoantigens by immunofluorescence (using the A and B blood group systems). Gallus domesticus (Aves) DAVIDOVA, S. I. — Inst, of Developm. Biol., Acad, of Sci. of the U.S.S.R.. Vavilov St. 26, MOSCOW V-133, U.S.S.R. a Effect of gonadotropins and changes in the germinal vesicle and in the oocyte cytoplasm during maturation (effect of actinomycin and puromycin on macromolecular synthesis). (Acipenseridae, Chondrostei; Amphibia) (in collaboration with Mrs. T. A. DETTLAFF) DAVIDSON, E. H. Ph.D. — Rockefeller Univ., 66th St. and York Ave., NEW YORK, N.Y. 10021, U.S.A. a Study of gene activity in oogenesis, the species and function of nucleic acids produced in lampbrush stage oocytes. Xenopus laevis (Anura) b Study of the molecular basis of cytoplasmic prelocalization. Ilyanassa obsoleta (Gastro- poda) DAVIES, D. V. D.Sc, Prof. — Dept. of Anat., St. Thomas's Hosp. Med. School, LONDON S.E.I. England a Joints. (Mammalia) h Placentation. (Vertebrata) DAVIS, Ch C. Ph.D.. Prof. — Developm. Biol. Center, Dept. of Biol., Western Reserve Univ., 2127 Cornell Rd., CLEVELAND. Ohio 44106, U.S.A. DAVIS, G. R. F. Ph.D. — Research Station, Research Branch, Canada Agriculture, Univ. Sub Post Office, SASKATOON, Sask.. Canada a The quantitative and qualitative requirements of immature stages for amino acids and the intermediary metabolism of these amino acids. Oryzaephilus surinamensis (Silvanidae. Coleoptera), Melanoplus sanguinipes (Acrididae. Orthoptera), Ctenicera destructor (Elate- ridae, Coleoptera) 38 b The effects of anti-metabolites on development and morphology. Ocyzaephilus surinameri' sis (Silvanidac, Colcoptera), Melanoplus sanguinipes (Acrididae, Orthoptera), Ctenicera destructor (El ateridac, Coleoptera) t.^-kt^,- rrr »t DAVIS, L. V. Ph.D. — Dept. of Zool.. Univ. of Hawaii. 2538 The Mall, HONOLULU. Hawaii 96822. U.S.A. a The relative contribution of mitosis and cell migration to growth and regeneration, studied by double isotope autoradiography. Hydra piracdi, H. littoralis (Hydroidea) b Inhibitory control of cell division by a-ketoaldchyde compounds. DAWID I. Ph.D. — Dept. of Embryol.. Carnegie Inst, of Washington. 115 W. University Parkway, BALTIMORE, Md. 21210, U.S.A. a Deoxyribonucleic acid synthesis during early development. Rana pipiens, Xenopus laevis DBALf, J. MUDr. — Dept. of Anat., Charles Univ., U nemocnice 3, PRAHA 2, Czecho- slovakia a Development of coronary arteries under normal and experimental conditions. Gallus domesficus (Aves), Rattus norvegicus (Rodentia) DEAN D Ph.D., Prof. — Ira C. Darling Center (Marine Laboratory). Univ. of Maine, WALPOLE. Me. 04513, U.S.A. a Descriptive morphology of larvae. Sabellacia vulgaris (Sedentada. Polychaeta), HarmO' thoe extenuata (Errantia, Polychaeta) b Life history; development from egg through young adult. Potamilla neglecta (Polychaeta) c Development from the three setiger planktonic larva to metamorphosis. (Polydora spec. (Sedentaria, Polychaeta) DEARDEN, M. B.Sc — Didsbury Coll. of Education, Wilmslow Rd.. MANCHESTER 20, England a Development of the cephalic complex in larva and pupa (microscopical examination, effects of dietary and other external influences, pharmacological effects, tissue culture). Drosophila melanog aster (Dipteta) DE BAVAY, J. M. F. X. B.Sc. — Dept. of Zool., Fac. of Sci., Univ. of New England. ARMIDALE 5 N., N.S.W., Australia a Normal embryology. Kyarranus sphagnicolus (Leptodactylidae, Anura) • DE BEER, Sir G. R. Prof. — La Colline, 1880 BEX. Suisse DE BOOM, H. P. A. Prof. — Dept. of Anat., Fac. of Veter. Sci., Univ. of Pretoria, P.O. ONDERSTEPOORT, South Africa a Teratogenesis of several congenital conditions (skew face, toothlessness, laminitis). Bos tauTus (Artiodactyla) DECK, J D. Ph.D. Prof. — Dept. of Anat., School of Med., Univ. of Virginia, CHAR- LOTTESVILLE, Va. 22901, U.S.A. a Elicitation of limb regeneration by means of microquantities of tissue extracts. Diemictylus viridescens (Urodeta) b Cytologic changes in muscle after injury. Diemictylus viridescens (Urodela) c Origin and development of cell surface coats. Perophora viridis (Tunicata) DECROLY (BRIERS), Mrs. M. Dr.Chem. — Lab. de Morph. anim., Univ. libre de Bruxel- les, 67 Rue des Chevaux, RHODE-ST-GENESE, Belgique a Metabolisme des acides nucleiques au cours du developpement embryonnaire. Xenopus laevis (Anura) h Etude des ribosomes au cours du developpement. Xenopus laevis (Anura) DE FABRO, Miss S. P. M.D., Prof. — Inst, de Biol. Celular, Univ. Nacional de Cordoba, Casilla Postal 362. CCRDOBA, Argentina a Gulonolactoneoxidase inhibition in the embryo, and the mechanism of enzyme repression with the product: ascorbic acid. Gallus domesticus (Aves) DE FEO, V. J. Ph.D., Prof. — Dept. of Anat., School of Med., Univ. of Hawaii, 2538 The Mall. HONOLULU, Hawaii 96822, U.S.A. a Blastocyst-endometrial relationship. (Rodentia) b Decidualization. (Rodentia) c Hormonal regulation of uterine RNA. (Rodentia) DEGENHARDT, K.-H. Dr.med., Prof. — Inst, fiir Humangenetik und vergl. Erbpathol. der Univ., Med. Fak., Paul-Ehrlich-Str. 41, 6-FRANKFURT/Main, Deutsche Bundesrepublik a Descriptive embryology. Ocyctolagus cuniculus (Lagomorpha), Musfela erminea (Carni- vara), Mesocdcetus auratus, Mus muscutus (Rodentia) b Experimental embryology. Ocyctolagus cuniculus (Lagomorpha). Mustela erminea (Carni- vora), Mesocdcetus auratus, Mus musculus (Rodentia) c Developmental genetics. Oryctolagus cuniculus (Lagomorpha), Mustela erminea (Carni- vora), Mus musculus (Rodentia) d Developmental pathology. Oryctolagus cuniculus (Lagomorpha), Musfela erminea (Carni- vora), Mus musculus, Mesocdcetus auratus (Rodentia) e Influence of antimetabolites (2-desoxy-5-fluorocytidin) on pattern formation in early primordia of different inbred strains. Mus musculus. Mesocricetus auratus (Rodentia i Influence of X-irradiation (dosages: 130 r, 65 r, 30 r, 15 r, 7 r) on pattern formatio.i in early primordia of embryonic development. Mus musculus, Mesocricetus auratus (Roden- tia) 39 DEGLI ESPOSTI, Miss A. M. Dr. — 1st. di Anat. Comp., Via Belmeloro 8. BOLOGNA DeHAAN R L Ph.D. — Dept. of Embryol.. Carnegie Inst, of Washington, 115 W. Uni- versity Parkway, BALTIMORE, Md. 21210, U.S.A. — Dept. of Biol., Johns Hopkins Univ., Charles and 34th Sts.. BALTIMORE. Md. 21218 U.S A. a Morphogenetic movements and cell migration associated with embryonic heart formation, studied with microsurgical, cinematographic and autoradiographic techniques. Callus gallus (Aves) b Pacemaker formation and the initiation of the heartbeat; regulation of spontaneous activity of embryonic heart cells in tissue culture. Gallus gallus (Aves) c Spatial organization and supracellular patterns in embryonic tissues. Gallus gallus (Aves) DELLA CROCE, N. Dr.Nat.Sci., Prof. — 1st. di Zool., Univ. di Genova, Via Balbi 5. GENOVA, Italia a Embryo development of a parthenogenetic marine form. Peniha avirostns (Uadocera. Crustacea) (in collaboration with Mrs. S. BETTANIN-BELGRANO) b Development of the sexual forms. Penilia avirostris (Cladocera, Crustacea) (in collabora- tion with Mrs. S. BETTANIN-BELGRANO) DELMAS, A. Prof. — Lab. d'Anat., Fac. de Med., 45 Rue des Sts.Peres, PARIS Vie. France a Developpement de I'encephale. Homo sapiens (Primates) h Developpement anormal de I'encephale et des organes des sens. Mus rattus (Rodentiaj DeLONG G R. M.D. — Dept. of Neurol., Massachusetts General Hosp.. BOSTON, Mass. 20015', U.S.A. , ^ , , , a Development of retino-tectal connections; reaggregation studies of retinal local specihcity. Gallus domesticus (Aves) -it/^-nt DELSOL, M. Dr.es Sci., Prof. — Dept. de Biol. Gener., Fac. CathoL, 25 Rue du Plat, LYON 2e, France DELYE (ROLLIN), Mrs. P. M. Lic.es Sci. — Lab. de Biol. Anim., Fac. des Sci., 1 Place Victor Hugo, MARSEILLE 3e, France DeMAGGIO, A E. Ph.D. — Dept. of Biol. Sci., Dartmouth Coll., HANOVER. N.H. 03755, U.S.A. a Experimental developmental morphology. (Plantae) DE MEIO, R. — Inst, de Biol. Celular, Univ. Nac. de Cordoba, Casilla Postal 362, CORDO- BA, Argentina DENIS, H. A. Dr.es Sci. — Lab. de Biochim., Fac. des Scis., Univ. de Liege. 17, Place Dei- cour, LIEGE, Belgique a Etude du role des acides nucleiques dans la differenciation embryonnaire. Xenopus laevis (Anura) DENIS, Miss S. Lic.Sci.Zool. — Lab. de Morphol. anim., Univ. libre de Bruxelles, 67, Rue des Chevaux, RHODE-ST-GENESE. Belgique a Studies on the metabolism of lethal hybrids. (Echinoidea; Amphibia) DENNE. M. p. Ph.D. — Plant Physiol. Div., Dept. of Scient. and Industrial Research, PALMERSTON NORTH, New Zealand DENT, J N. Ph.D., Prof. — Dept. of Biol, Univ. of Virginia, Gilmer Hall. CHARLOTTES- VILLE, Va. 22903, U.S.A. a Metamorphic physiology and morphology of a trogloditic form. (Urodela) h Development of the immune response. (Urodela) ,-,r ^ i DEOL. M. S. Ph.D. — Dept. of Genet., Univ. Coll. London, Cower St., LONDON W.C.I, England DEPARIS, P. Dr.en Biol. — Lab. de Biol, gener., Fac. des Sci., 118 Route de Narbonne, 31 -TOULOUSE, France a Hematopoiese. (Urodela) „ , t^ nunrc DfiPECHE, J. — Lab. d'Evolution des Etres Organises, Fac. des Sci., 105 Bd. Raspail, PARIS 6e, France a Physiological investigations on embryos of viviparous forms developing in vitro. Poecilia reticulata (zzLebistes reticulatus), Xiphophoms helleri, Gambusia affinis, Hetecan- dvia formosa (Poeciliidae, Teleostei) DEROM, R. M. J. M.D., Ph.D. — Dept. of Obstetr. and Gynecol., Fac. of Med., Univ. Hosp., De P'intelaan, GENT, Belgium a Anaerobic metabolism in the fetus (determination of blood lactate and pyruvate; calculation of "excess lactate"). Homo sapiens (Primates) h Longitudinal study of uniovular twins (determination of genotype based on structure of placental membranes and on differences in blood groups; followup on a long term basis). Homo sapiens (Primates) DESALU. A. B. O. — Dept. of Anat., Univ. of Ibadan, IBADAN, Nigeria a Enzyme histochemistry of the developing kidney. Rattus norvegicus (Rodentia) DESCAMPS, P. Dr.en Med. — Lab. dHistol.-Embryol. B, Fac. de Med. de Paris. 45 Rue des Sts.Peres, PARIS Vie, France a Abnormalities in the development of the genitourinary tract. Homo sapiens (Primates) 40 b Abnormalities in closure of the ventral body wall. Homo sapiens (Primates) c Exstrophy of the urinary bladder. Homo sapiens (Primates) DESSOUKY. D. A. M.D., Ph.D. — Dept. of Anat., School of Med., Georgetown Univ.. 3900 Reservoir Road, N.W., WASHINGTON, D.C. 20007, U.S.A. a Development and differentiation of skeletal muscle, electron microscopy. Gallus domesticus (Aves) b Development of motor-end plate and relation to differentiation of the skeletal muscle. Gallus domesticus (Aves) DE TERRA (WHITTAKER). Mrs. N. Ph.D. — Inst, for Cancer Research. 7701 Burholme Ave., PHILADELPHIA, Pa. 19111. U.S.A. a Morphogenesis and nucleo-cytoplasmic interactions studied by microsurgery, histochemistry and autoradiography. Stentor coeruleus (Ciliata) DETH, J. H. M. G. van M.D. — Dept. of Anat. and Histol., Univ. of Adelaide. ADELAIDE. S.Australia 5000, Australia a Teratogenesis by hormones. Gallus domesticus (Aves). Rattus norvegicus (Rodentia) h Hormonal influences on sex determination. Gallus domesticus (Aves) • DETTLAFF, Mrs. T. A. Dr.biol.sci., Prof. — Inst, of Developm. Biol., Acad, of Sci. ol the U.S.S.R.. Vavilov St. 26, MOSCOW V-133, U.S.S.R. a The nature of the specificity of oocyte nuclei in the process of oocyte maturation. (Amphibia) b Effect of gonadotropins and changes in the germinal vesicle and in the oocyte cytoplasm during maturation (effect of actinomycin and puromycin on macromolecular synthesis). (Acipenseridae, Chondrostei; Amphibia) (in collaboration with S. I. DAVIDOVA and J. G. SCHMERLING) c Time regularities of the maturation process; temperature effect upon maturation processes in vivo and in vitro. (Amphibia) (in collaboration with T. RUDNEVA) d Cell division: duration, mechanism, relation to the process of differentiation. (Acipenseri- dae, Chondrostei; Amphibia) DEUCHAR, Miss E. M. Ph.D. — Dept. of Anat. and Embryol., Univ. Coll. London, Gower St.. LONDON W.C.I, England a Changes in types of RNA in different developing tissues and in the nucleotide base composition. Xenopus laevis (Anura) DEUTSCH, G. Dr.med. — Centrul de Embriol. Norm. §i Patol., Acad. Republ. Social, Romania, Bui. M. Viteazul 24, TIMI§OARA. Rumania a Placental blood circulation. (Mammalia) b Embryonic and adult kidney metabolism. (Mammalia) • DEVILLERS, Ch. Prof. — Lab. d'Anat. comp., 7 Quai St. Bernard, PARIS Ve, France a Origine de I'energie utilisee au cours du developpement de I'oeuf. Salmo fario. S. icideus (Teleostei) b Respiration de I'oeuf. Salmo irideus, Brachydanio rerio (Teleostei) • DE VINCENTIIS, M. Prof . — Catt. di Istol. ed Embriol., Univ. di Camerino, CAME- RINO, Italia DHAINAUT, A. — Lab. de Zool., Fac. des Sci., B.P. 36, 59-LILLE-Distribution. France a Ovogenese; ultrastructure et autoradiographie a haute resolution. Nereis diversicolor, N. pelagica (Annelida) DHOUAILLY, Miss D. Dr. — Lab. de Zool., Fac. des Sci. de Grenoble, Domaine Univer- sitaire, 38-SAINT-MARTIN-d'HERES, France a Experimental analysis of the specific differentiation of the neoptile feather in chimaeric combinations between two species of birds. Gallus domesticus. Anas boschas (Aves) • DiBERARDINO, Miss M. A. Ph.D., Prof . — Dept. of Anat., Women's Med. Coll. and Hosp. of Penna., Henry Ave. and Abbotsford Rd., PHILADELPHIA, Pa.. U.S.A. a Nuclear, chromosomal and cytoplasmic changes during development, Rana pipiens (Anura) DICK, D. A. T. Ph.D. — Dept. of Human Anat.. Univ. Museum. South Parks Road, OX- FORD, England a Study of ion fluxes in oocytes. Bufo bufo (Anura) DICKSON, A. D. M.D. — Dept. of Anat., Health Sci. Centre, Univ. of Western Ontario, LONDON, Ontario, Canada a Effect of ovarian hormones upon pre-implantation development. Mus musculus (Rodentia) DICKSON. D. H. B.A. — Dept. of Zool.. Coll. of Sci., Univ. of Western Ontario, LON- DON. Ont., Canada a Effects of chloramphenicol on developmental processes. (Teleostei) DIDIER (MARTIN), Mrs. E. Lic.es Sci. — Lab. de Biol. Anim., 1 Av. Vercingetorix, 63 CLERMONT-FERRAND. France DIEHL, F. A. Ph.D. — Dept. of Biol., University of Virginia, Gilmer Hall, CHARLOTTES- VILLE, Va. 22903, U.S.A. a Problems of development: cell and tissue migrations; the roles of individual cell types during morphogenesis; the synthesis of extracellular mesoglea and perisarc and their role in development. Cordylophora caspia (Hydroidea) 41 DIETERLEN (LIEVRE). Mrs. F. Dr.es Sci. — Inst. d'Embryol. exper. du Coll. de France et du C.N.R.S., 1 1 Place M. Berthelot, PARIS Ve, France a In vitro development of the pancreas; its influence on liver glycogen in associated cultures. Gallus gallus (Aves) b Formation of glycogen in organotypic cultures of embryonic liver. Gallus gallus (Aves) c Ultrastructure of the embryonic pancreas. Gallus gallus (Aves) d Endoderm-mesenchyme interactions in the development of the pancreas: reassociation with heterologous mesenchymes (lung, gizzard or somatopleura) (organotypical cultures followed by coelomic grafts). Gallus gallus (Aves) e Inductive interactions in the early development of the spleen. Gallus gallus (Aves) DILLARD, W. Ph.D. — Max Planck Inst, fiir Meeresbiol., Anton Dohm Weg, 294 WIL HELMSHAVEN, Deutsche Bundesrepubhk a RNA-synthesis. Acetabulana spp. (Algae) DI MARCOTULLIO, A. D.Sc — 1st. Zool. e Anat. Comp.. Univ., Via Alfonso Valerio. 32-TRIESTE, Italia a Regeneration and germ cell differentiation. (Planadidae. Turbellaria) DIMOND, Sister M. T. Ph.D.. Prof . — Dept. of Biol., Trinity Coll., WASHINGTON, D.C. 20017, U.S.A. a Histogenesis and interrelations of endocrines: the hypophysis under normal conditions and after treatment with goitrogens; the developmental sequence of organic iodine compounds in the thyroid; localization and activity of thyrocalcitonin. Chelydra serpentina serp. and other spp. (Chelonia) DINGLER (HAHL), Mrs. E. Ch. Dr.med.. Prof. — Anat. Inst, der Univ., Pettenkoferstr. 11, MONCHEN 15, Deutsche Bundesrepubhk DI STEFANO, L. Dr. — 1st. di Istol. ed Embriol., Univ. di Palermo, Via Archirafi 18. 90123 PALERMO, Italia a Naphthylamidase activity in eggs and embryos. Physa acuta (Gastropoda) DOANE. Mrs. W. W. Ph.D. — Dept. of Biol., Yale Univ., NEW HAVEN, Conn. 06520, U.S.A. a Analysis of electrophoretic variants for amylases and the mechanisms that control the production of amylase isozymes in various tissues during development. Drosophila melano- gaster, D. hydei, D. nigrohydei and other spp. (Diptera) b Developmental and experimental analysis of mutants characterized by abnormalities in lipid and carbohydrate metabolism, as well as in endocrine and reproductive physiology, Drosophila melanogaster (Diptera) DOBKIN, Sh. Ph.D. — Dept. of Biol. Scis., Florida Atlantic Univ., BOCA RATON, Fla., U.S.A. DOBROKHOTOV, V. N. Cand.biol.sci. — Dept. of Gener. Biol.. II. Moscow Med. Inst., Pogodinskaya 6, MOSCOW, U.S.S.R. a The peculiarities of cell replication in embryogenesis. Rattus rattus (Rodentia) DOBRZAl