Issued by the Hubrecht Laboratory on behalf of the Foundation .General Embryological Information Service' Janskerkhof 2 - Utrecht - Netherlands CONTENTS a) Introduction p. 5 b) List of names and addresses with subjects in preparation (alpha- betical order) p. ^ c) List of institutes with composition of scientific staffs (geographical order) p. 123 d) List of subjects with names of investigators (arranged according to organ systems and taxonomic groups) p. 153 General division p. 153 I Descriptive and comparative embryology . . . . p. 155 II Experimental developmental morphology . . . . p. 164 III Physiology of development p. 174 IV Development and genetics p. 185 V Development and pathology p. 187 VI Regeneration p. 190 VII Metamorphosis P- 192 e) New technical methods in developmental biology (arranged accor- ding to subjects) P- 194 f) "Supply and Demand" Service for laboratory animals .... p. 199 g) Communications from the Hubrecht Laboratory ....... p. 204 I The Laboratory p. 204 II The Central Embryological Library (C.E.L.) ... p. 204 III The Central Embryological Collection of slides and material p. 205 IV The Photographic Reproduction Service .... p. 205 h) Communications of the ,.Institut International d'Embryologie" (Embryological Section of the I.U.B.S.) . : p. 206 ) Announcements of recently published books on development and related subjects p. 211 758^ w^^o INTRODUCTION Subscribers are now receiving the seventh full issue, containing the new data received during 1957. The number of individual collaborators and that of collaborating institutes still shows a gradual rise. Contacts have been established with Bulgaria, Hong Kong, Hungaria and Rumania. In January, 1958, the General Embryological Information Service will be established as a separate foundation, which will be placed under the control of the Embryological Committee of the Royal Dutch Academy of Sciences. The editorial work and administration will remain in the hands of the staff of the Hubrecht Laboratory. The aims of the new foundation falling entirely in line with the general objectives of the International Institute of Embryology, the Board of the foun- dation will gratefully consider suggestions for improvement of this Service from the side of the I. I.E. or of its individual members. Following a suggestion of the General Assembly of the International In- stitute of Embryology, in this issue a new chapter is opened, supplying data on new technical methods in developmental biology (see page 194). We have received a satisfactory number of answers on the questionnaire concerned, and expect that this number will increase in following years when the chapter will have shown its usefulness. This chapter will only be published in the full issues, so that each time it covers a period of two years. Suggestions for im- provement will be appreciated. As a result of an agreement with the ,, International Committee on Labora- tory Animals" we have decided henceforth to omit from the "Supply and Demand Service [or Laboratory Animals" the information concerning birds and mammals, those groups being covered much more extensively by the pro- gramme of this Committee (see page 199). The previous "reviews of recently published books" have been given a sim- pler form, viz. that of announcements, which give just so much factual informa- tion about the books, as will enable the reader to form an idea of their signi- ficance. P. D. NIEUWKOOP A-Akc LIST OF NAMES AND ADDRESSES with Subjects in Preparation (alphabetical order) ABELOOS, M. Prof. — Lab. de Zool. gener. de la Fac. des Sci. et Stat. marine d'Endoume (Marseille), Place Victor Hugo, MARSEILLE, France ABERCROMBIE, M. B.Sc, M.A., F.LI.E. — Dept of Embryol., Univ. Coll. London, Gower St, LONDON W.C. 1, England a. Transplantation experiments on blastoderm tissue culture. Gallus domes- ticns (Aves) b. Study of cell relations in tissue culture. Gallus domesticus (Aves) (in collaboration with Miss H. M. KARTHAUSER) ADAMS, Miss E. C. B.A. — Dept of Pathol., Harvard Med. School, 25 Shattuck St. BOSTON 15, Mass., U.S.A. a. Histochemical observations on early fertilized ova of less than 14 days age. Homo sapiens (Primates) (in collaboration with J. ROCK, W. J. MULLIGAN and A. T. HERTIG) b. Histochemical studies on developing embryos. Homo sapiens (Primates) (in collaboration with A. T. HERTIG and D. G. McKAY) c. Histochemical studies on abnormal trophoblast with special reference to hydatidiform mole and chorionepithelioma. Homo sapiens (Primates) (in collaboration with D. G. McKAY. K. BENIRSCHKE. W. BARDAWIL and A. T. HERTIG) ADAMS, W. E. B.Med.Sc. Ch.B.. M.B., M.Sc, Ph.D., F.A.Z., ProL — Anat. Dept, Univ. of Otago Med. School, Great King Street. P.O. Box 913. DUNEDIN, New Zealand a. Development of the carotid arch. Sphaerodactylus argus (Lacertilia), various spp. (Mammalia) ADAMSTONE, F. B. Ph.D.. Prof. — Dept of Zool., Univ. of Illinois, URBANA, 111., U.S.A. ADELMANN. H. B. Dr, F.I. I.E., Prof. — Dept of Zool., Cornell Univ.. ITHACA, N.Y.. U.S.A. ADHIKARI, S. B.Sc. (Hons) — Dept of Zoology, Presidency Coll., Col- lege St, CALCUTTA 12, India a. Cellular factors in morphogenesis. Gallus gallus (Aves) (in collaboration with S. MOOKERJEE) AGRELL, I. P. S. Dr Fil. — Zoophyiol. Inst.. Univ. of LUND, Sweden AKESSON,B. Fil.lic. — Embryol. Dept, Zool. Inst, of the Univ. of Lund, LUND. Sweden AKETA, K. M.A. — Biol. Inst., Fac. of Sci.. Nagoya Univ., Chigusa-Ku. NAGOYA. Japan a. Biochemistry of fertilization with special reference to carbohydrate and carboxylic acid metabolism. Hemicentrotus pulcherrimus, Pseudocentro- tus depressus (Echinoidea) h. Cytochemistry and biochemistry of egg mitochondria. Hemicentrotus pulcherrimus, Pseudocentrotus depressus (Echinoidea), Oryzias latipes (Teleostei) 7 Ala-Ass ALAMELU. Miss M. G. B.Sc. (Hons) — Dept of Zoology, Presidency Coll.. College St. CALCUTTA 12. India a. Effect of chemical transport in morphogenesis. Amoeba spec. (Protozoa) (in collaboration with S. MOOKERJEE) ALBRIGHT. J. F. — Dept of Zool., Indiana Univ.. BLOOMINGTON. Ind.. U.S.A. ALDEN. R. H. Ph.D.. Prof. — Div. of Anat.. Med. Units Div.. Fac. of Biol. Sci.. Univ. of Tennessee. MEMPHIS 3. Tenn., U.S.A. a. Study of egg transport and implantation; early development of tropho- blast; embryo-maternal relationships during nidation. Mus spec. (Ro- dentia) ALEXANDER. G. M.Agr.Sci. — Div. of Animal Health and Production. C.S.I. R.O.. Sheep Biol. Lab.. Great Western Highway. (P.O. Box 144. Parramatta). PROSPECT. N.S.W.. Austraha a. Investigations of the physical and physiological relations between mater- nal and embryological tissues. Ovis spec. (Artiodactyla) ALKEMADE. Miss E. C. M. — Lab. for Cytol. and exper. Histol., Fac. of Med.. Univ. of Leyde, Rijnsburgerweg 10, Boerhaavekwartier. LEIDEN. Holland a. Bone formation of the terminal phalanx. Homo sapiens (Primates) ALLANSON— BAXTER. Mrs. M. B.Sc. Ph.D. — Biol. Dept.. Med. School. St Mary's Hosp., Paddington. LONDON W. 2, England ALONSO. Miss M. — 1st. di Zool.. Via Archirafi 18. PALERMO, Italia a. Transplantation of neural crest between varieties. Discoglossus pictiis (Anura) ALTSCHUL. R. M.D., Prof. — Dept of Anat., Univ. of Saskatchewan. SASKATOON. Canada a. Tissue culture. Influence of biostimulators on cell growth. AMANUMA, A. M.Sc. — Lab. Exper. Embryol., Inst, of Polytechn., Osaka City Univ.. Minami-Ogimati. Kita-ku. OSAKA. Japan AMOROSO. E. C. — Dept of Anat.. Harvard Univ.. Med. School. 25 Shattuck St. BOSTON 15. Mass.. U.S.A. 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) b. Regulative capacities of the wing anlage. Gallus domesticus (Aves) c. Regulative and regenerative capacities of the primary optic vesicle. Gal- lus domesticus (Aves) AMY. R. L. M.S.. Ph.D. — Biol. Dept, Susquehanna Univ.. SELINS- GROVE. Pa, U.S.A. a. An action spectrum study of the effects of monochromatic ultraviolet light on early developmental stages. Habrobracon juglandis (Hymeno- ptera) b. Relative sensitivity of various developmental stages to ultraviolet light (photoreactivation studies to be included). Habrobracon juglandis (Hymenoptera) ANCEL, P. A. Dr. F.I. I.E., Prof. (Honor.. Emer.) — Inst, de Biol, physico- chimique, Fac. de Med.. 13 Rue Pierre Curie, PARIS Ve. France ANDERS. G. Dr Phil. — Zool.-vergl. Anat. Inst.. Naturw. Fak.. Univ. Zurich, Kiinstlergasse 16. ZORICH 6, Schweiz 8 ANDO. S. B.Sc. M.A. — Biol. Inst.. Fac. of Sci., Nagoya Univ., Chigusa- Ku. NAGOYA. Japan a. Physiological analysis of maturation. Oryzias latipes (Teleostei) b. Metabolic analysis of fertilization and early development. Hemicentrotus pulcherrimus (Echinoidea) ANDRES. G. Dr — Max Planck-Inst. fiir Biol.. Spemannstr. 34. TttBIN- GEN. Deutschland a. Untersuchung von Wachstumskorrelationen. (Anura), Gallus spec. (Aves) b. Untersuchungen uber die Entwicklung von Farbmustern mit Hilfe xeno- plastischer Transplantationen. Bombinator spec. Discoglossus spec. Hyla spec, Rana spec, Xenopus spec. (Anura) ANDRES. M. Y. D.V.M.. M.Sc — Dept of Vet. Anat.. Ohio State Univ., COLUMBUS 10. Ohio, U.S.A. a. Physiology of the developing pineal organ. (Aves) ANDREW. Miss A. B.Sc. M.Sc — Dept of Anat., Univ. of the Wit- watersrand. Milner Park. JOHANNESBURG. South Africa (no embryological work in progress) ANTON. H. J. Dr — Zool. Inst, der Univ. Koln, Kerpenerstr. 13. KOLN- LINDENTHAL, Deutschland a. Die Regenerationsleistungen heteroplastischer Keimblattchimaren. Tritu- rus vulgaris, T. cristatus, T, alpestris (Urodela) h. Unvertraglichkeitsreaktionen bei heteroplastischen Transplantationen. Triturus vulgaris, T. cristatus, T. alpestris (Urodela) ARIENS KAPPERS. J. M.D.. Prof. — Anat.-Embryol. Lab. der Rijks Univ.. Oostersingel 69, GRONINGEN, Holland a, Cytological and histochemical development of choroid plexus. Homo sapiens (Primates) ARMSTRONG, P. B. B.S.. M.D.. Prof. — Dept of Anat.. School of Med., State Univ. of New York, 766 Irving Ave, SYRACUSE 10, N.Y.. U.S.A. a. Function in the developing liver. Amby stoma punctatum (Urodela), Amiurus nebulosus (Teleostei) b. Behavioral responses in developing embryos. Ambystoma punctatum (Urodela), Amiurus nebulosus (Teleostei) ARSLAN, M. B.ScHons. — Dept of Zool.. Government Coll.. LAHORE. Pakistan a. Reproduction and development. Funambulus palmarum (Sciuromorpha, Rodentia) ASAYAMA, S. M.Sc. D.Sc. Prof. — Lab. Exper. Embryol., Inst, of Poly- techn., Osaka City Univ., Minami-Ogimati, Kita-ku, OSAKA, Japan ASHLEY, G. T. B.Sc, Ch.B., M.D. — Anat. Dept. The University. MANCHESTER. England a. Normal and abnormal development of thoracic and pelvic viscera. Various spp. (Vertebrata) ASSENMACHER. I. Dr en Med. — Lab. d'Histophysiol. Coll. de France. Place Marcelin Berthelot. PARIS Ve. France a. Developpement et physiologic de I'hypothalamus et de I'hypophyse. Anas spec. (Aves) 9 Ast-Bar ASTAUROV. B. L. Dr Biol. Sci., F.I. I.E.. Prof. — Inst, of Animal Mor- phol. of the Acad, of Sci. of the U.S.S.R., Bolshaja Kalushskaja 33, MOSCOW V-71, U.S.S.R. a. Artificial parthenogenesis and experimental polyploidy. Bombijx mori L. (Lcpidoptcra) b. Androgcnesis, especially interspecific. Bombyx mori L., B. mandarina Moore (Lcpidoptcra) c. Influence of high temperature on developmental processes; heat denatu- ration of proteins. Bombyx mori L. (Lcpidoptcra) and many other orga- nisms d. Differential sensitivity of cell nucleus and cytoplasm to ionizing radia- tion. Bombyx mori L. (Lcpidoptcra) ATTARDO, Miss C. Dr - 1st. di Zool.. Via Archirafi 18, PALERMO, Italia AUBRY. Miss R. Lie. es Sci. — Lab. de Biol, gen., Inst, de Zool. et de Biol. gen., Fac. des Sci., 12 Rue de I'Universite, STRASBOURG, France a. Etude de la lignee germinale. (Amphibia) b. Etude de I'hermaphroditisme. (Gastropoda) AUERBACH. R. Ph.D. — Dept of Zool., Univ. of Wisconsin, MADISON, Wis., U.S.A. a. Embryonic tissue interactions. Mus musculus (Rodcntia) AUSTIN, C. R. B.V.Sc, D.Sc, M.I.I.E. — Nat. Inst, for Med. Research, Mill Hill, LONDON N.W. 7. England malia) a. Investigations on gametes, fertihzation and early development. (Mam- AVEL. M. Dr, F.I. I.E., Prof. — Fac. des Sci. de Bordeaux, 40 Rue Lamar- tine. TALENCE (Gironde), France AVIS, F. A.B. — Roscoe B. Jackson Memorial Lab., Box 558, BAR HAR- BOR. Me. U.S.A. AZOUBEL, R. B.Sc. — Cadeira de Histol. e Embriol., Fac. de Medicina, Univ. do Recife, Caixa Postal N. 616. RECIFE. Brasil a. Analysis of the development of the neural crest and its derivatives in the neck region, by means of the carbon-marking technique. Gallus domcsticus (Avcs) 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) h. Early embryology and implantation. Halichocrus grypus (Pinnipcdia) c. Implantation of the blastocyst. (Mammalia) BACKSTROM, S. A. A. Fil.lic. — Wenner-Grens Inst, for exper. Biol.. Norrtullsgatan 16. STOCKHOLM Va., Sweden a. Reducing and oxidizing substances in development. (Echinoidca), Xeno- pus spec. (Anura) BAFFONI. G. M. Dr — 1st. di Anat. comp. "G. B. Grassi". Fac. di Sci., Univ. di Roma. Via Borelli 50. ROMA. Italia a. Growth and differentiation of the nervous cell. BAGINSKI, S. M.D. — Inst, of Histol. and Embryol., Acad, of Med.. Narutowicza 60, LOD2. Poland a. Investigations of experimentally provoked raonstruosities in embryos. Gallus spec. (Avcs) b. Influence of azo-dyes on the development of embryos. Gallus spec. (Aues) 10 BAILEY, J. C. A.B., M.A.. Ph.D. — Lab. of Perinatal PhysioL, NINDB, School of Med.. SAN JUAN. P.R.. U.S.A. a. Effects of neonatal asphyxia with emphasis on mental retardation; expe- rimental studies. (Rodentia, Primates) b. Organization of a project of collaborative investigations on factors in the perinatal period of the Rhesus monkey leading to neurological and psy- chological deficits in the offspring. Protocol blanks will be sent on request. BAIOCCHI. O. — Lab. d'Hormonol. et dc Cytol. Exper., Ecole pratique des Hautes Etudes, Hopital Broca. 1 1 1 Rue L. M. Nordmann, PARIS XIII, France a. Decoloration du dichlorophenol indophenol (DPIP) par I'ovocyte. Etude par micro-injection quantitative. Mas musculus (Rodentia) (en colla- boration avec R. MORICARD et Miss M. M. C. S. GOTHIE) BALASUBRAMANIAM, K. B.Sc.(Hons) — Dept of Zool.. Presidency Coll., College St, CALCUTTA 12, India a. Cellular factors in morphogenesis. Gallus gallus (Aves) (in collaboration with S. MOOKERJEE) BALINSKY, B. I. Dr Biol.Sci., F.I.I.E.. Prof. — Dept of Zool., Univ. of the Witwatersrand, Milner Park, JOHANNESBURG, South Africa a. Heteroplastic transplantation of ectoderm between different species. (Anura) BALTUS, Miss E. Dr en Sci. — Lab. de Morphol. anim., Univ. libre de Bruxelles, 1850 Chaussee de Wavre, BRUXELLES-Auderghem, Bcl- gique a. Study on isolated nucleoli. Asterias Rubens (Asteroidea, Echinodermata) BALTZER, F. Dr, Dr h.c. Strassb., Dr h.c. Freib. (Baden), F.I.I.E., Prof. (Emer.) — Zool. Inst, der Univ. Bern, Sahlistr. 8, BERN, Schweiz a. Letalitat und Vererbungsrichtung bei Bastarden. (Echinoidea) (mit ver- schiedenen Mitarbeitern) b. Xenoplastische Chimaren. (Amphibia) (in Zusammenarbeit mit P.S. CHEN, Zurich) BARBIERI, F. D. Dr — Inst, de Biol. Gener. y Embriol. Exper., Casilla de Correos 193, TUCUMAN, Argentina a. Cytochemical effects of ultraviolet radiation on the developing embryo. Gallus spec. (Aves) BARDAWIL. W. — Dept of Pathol., Harvard Univ., Med. School, 25 Shattuck St, BOSTON 15, Mass., U.S.A. a. Histochemical studies on abnormal trophoblast with special reference to hydatidiform mole and chorionepithelioma. Homo sapiens (Primates) (in collaboration with A. T. HERTIG, D. G. McKAY, K. BENIRSCH- KE and Miss E. C. ADAMS) BARIGOZZI, C. Dr Sci., Prof. — 1st. di Genet.. Univ. di Milano, Via Celoria 10 MILANO. Italia a. Development of melanomes with different genotypes. Drosophila spec. (Diptera) BARRY, T. H. D.Sc. — Dept of Zool., Fac. of Sci., Univ. of Pretoria, PRETORIA, South Africa BARTELMEZ. G. W. Ph.D. — Dept of Embryol., Carnegie Inst, of Washington, Wolfe and Madison Sts, BALTIMORE 5, Md. U.S.A. a. Blood supply of uterus. Macaca mulatta (Primates) 11 Bartclmcz-Bcn 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.. F.I.I.E., Prof. — Dept of Zool., Fac. of pure Sci.. Columbia Univ.. Broadway and 11 6th St. NEW YORK 27. N.Y., U.S.A. BARTH. Mrs L. JAEGER A.B., M.A.. Ph.D. — Dept of Zool.. Fac. of pure Sci.. Columbia Univ.. Broadway and 116th St, NEW YORK 27, N.Y., U.S.A. BAST. T. H. B.A.. Ph.D., Prof. — Dept of Anat., Bardcen Med. Labs. Univ. of Wisconsin, MADISON 6, Wis., U.S.A. a. Embryology and anatomy of the middle and internal ear, and the man- dible. Homo sapiens (Primates) BATTAGLIA. B. Sc.D. — 1st. di Zool. e Anat. comp., Fac. di Sci., Via Loredan 10, PADOVA, Italia BATTLE, Miss H. I. Ph.D., Prof. — Dept of Zool., Univ. of Western Ontario, LONDON, Ont., Canada a. A survey of the larval and young fish of central lake Erie. (Teleostei) b. Effects of urethane on mitochondria in blastomeres. Brachydanio rerio (Teleostei) c. Effects of 3 cm. microwaves on developing fish. Salmo trutta fario ( Teleostei) d. Effects of purines and purine antagonists on early developmental pro- cesses. Salmo trutta fario, Brachydanio rerio (Teleostei) c. Morphogenesis of the digestive tract. Crassostrea virginica (Gmelin) (Mollusca) BAUD. C. A. Dr Med. — Inst. d'Anat., Fac. de Med., Univ. de Geneve, 20 Rue Ecole de Med.. GENfiVE, Suisse a. Etude du debut de la formation des myofibrilles dans I'ebauche cardiaque. Gallus spec. (Aves) BAUMANN, J. A. Dr. Prof. — Inst. d'Anat., Fac. de Med., Univ. de Geneve, 20 Rue Ecole de Med., GENfiVE, Suisse a. Etude descriptive du developpement de I'innervation du coeur. Gallus spec. (Aves) (en collaboration avec J. GALLERA) BAUTZMANN, H. Dr Med., Prof. — Anat. Inst, der Univ. Hamburg. Schottmiillerstr. 1, HAMBURG 20. Deutschland a. Entwicklungsphysiologie der Primitiventwicklung. (Vettebrata, bes. Amphibia) b. Vergleichende Histofunktion, Histogenese und Histophysiologie der Amnioneinrichtungen. (Amniota) c. Fruchthiillenmotorik und Motorik des Embryo. ( Evertebrata, Verte- brata) BAXTER, E. W. B.Sc, Ph.D. — Biol. Dept, Guy's Hosp. Med. School, LONDON S.E. 1, England a. Biology, including development and metamorphosis. Petromyzon spec. (Cyclostomata) b. Chromosome numbers. Lampetra planed, L. fluviatilis (Cyclostomata) c. Food changes during larval period of growth. Ammocoetes spec. (Cyclo- stomata) BEARD, R. G. A.B., M.A. — Dept of Embryol., Carnegie Inst, of Wash- ington. Wolfe and Madison Sts, BALTIMORE 5. Md, U.S.A. 12 a. An immunological analysis of the temporal and spatial appearance of the hemoglobin molecule in the developing embryo. Gallus domesticus (Aves) BEATTY, R. A. B.A., M.A., Ph.D., M.I.I.E. — Inst, of Animal Genet.. Univ. Dept of Genet., King's Buildings, West Mains Rd, EDINBURGH 9, Scotland a. Heteroploidy and parthenogenesis; egg transfer; operations on embryos. Mus musculus (Rodentia), Oryctolagus cuniculus (Lagomorpha) b. Breeding of genetically tagged strains for use in experimental embryo- logy. Oryctolagus cuniculus (Lagomorpha) c. Heterospermic insemination and growth of embryo. Oryctolagus cuni- culus (Lagomorpha) d. Film of normal development Oryctolagus cuniculus (Lagomorpha) (in collaboration with E. C. A. LUCEY) e. Developmental biology and genetics of gametes. Mus musculus (Roden- tia), Oryctolagus cuniculus (Lagomorpha) BEAU, A. A. Dr, Prof. — Lab. d'Anat., Inst. Anat., Fac. de Med., 31 Rue Lionnois, NANCY (Meurthe & Moselle). France BECKER. U. Dr rer. nat. — Heiligenberg-Inst.. (17b) HEILIGENBERG. Kreis Ueberlingen/Bodensee, Deutschland a. Experimente zur Analyse der Induktionsstoffe. (Amphibia) h. Linsenentwicklung. (Amphibia) BEDNJAKOVA, Mrs T. A. Cand.Biol.Sci. — Inst, of Animal Morphol. of the Acad, of Sci. of the U.S.S.R., Bolshaja Kalushkaja 33, MOSCOW V-71, U.S.S.R. a. Influence of high temperatures on developmental processes. Bombyx mori L. (Lepidoptera) b. Analysis of sterilizing effect of sublethal high temperature on eggs in- fected with Nosema bombycis. Bombyx mori L. (Lepidoptera) (in colla- boration with Miss V. N. VEREJSKAJA) BEER. Sir G. R. de F.I. I.E., Prof. — British Museum (Natural History). Cromwell Road, LONDON, S.W. 7, England (U.K.) BELAISCH, J. — Lab. d'Hormonol. et Cytol. Exper., Ecole pratique des Hautes Etudes, Hopital Broca. 1 1 1 Rue L. M. Nordmann, PARIS XIII. France a. Etude des secretions cervicales, uterines et tubaires, en rapport avec les phenomenes de I'ascension spermatique. de la fecondation, de la segmen- tation, et de la nidation. Oryctolagus cuniculus (Lagomorpha) (en colla- boration avec R. MORICARD et Miss M. M. C. S. GOTHIE) BELLAIRS— MORGAN, Mrs M. R. B.Sc. Ph.D. — Dept of Zool. and Comp. Anat., St Bartholomew's Hosp. Med. Coll., Charterhouse Square. LONDON E.G. 1, England a. An electron microscopical study of neural. tube differentiation. Gallus domesticus (Aves) BELLVOMINI, H. — Institute Butantan, SAO PAULO. Brasil a. Intersexuality. Bothrops insularis Amand (Ophidia) (in collaboration with A. HOGE and G. SCHREIBER. Belo Horizonte) BENAZZI. M. M.I.I.E., Prof.ord. — 1st. di Zool. e Anat. comp. dell'Univ., Via A. Volta 4. PISA, Italia a Fertilization, pseudogamy, polyploidy and heredity. (Tricladidea, Turbel- latia) ^ (Urodela) b. Hybrids. Triturus vulgaris x Tr. cristatus, Tr. italicus and ir. helveticus 13 BcnBis BENAZZI— LENTATI. Mrs G. — 1st. di Zool. e Anat. comp. dell'Univ., Via A. Volta 4, PISA. Italia Turbellaria) a. Ovo- and spermatogenesis: fertilization and cytology. (Tricladidea. BENGMARK, S. Med.lic. — Dept of Anat.. University. LUND. Sweden a. Derivation of prostatic gland. Homo sapiens, Rattus spec. (Mammalia) b. Hormonal influence on development of genital organs. Rattus spec. (Rodcntia) (in collaboration with J. G. FORSBERG) BENIRSCHKE, K. M.D. — Dept of Pathol.. Harvard Univ., Med. School, 25 Shattuck St. BOSTON 15. Mass.. U.S.A. a. The identification of the hormones produced (if any) by the fetal corti- cal zone of the adrenal gland. Homo sapiens (Primates) h. Histochemical studies on abnormal trophoblast with special reference to hydatidiform mole and chorionepithelioma. Homo sapiens (Primates) (in collaboration with D. G. McKAY. A. T. HERTIG, W. BARDAWIL and Miss E. C. ADAMS) BENOIT. J. Dr en Med., Dr es Sci., Prof. — Lab. d'Histophysiol.. Coll. de France, Place Marcelin Berthclot, PARIS Ve, France a. Action du DNA sur le dcveloppement de I'organisme. (Vertebres supe- rieuresj BENOIT. J. A. A. — Lab. d'Embryol. exper. du C.N.R.S.. Coll. de France, 49bis Avenue de la Belle-Gabrielle. NOGENT sur Marne (Seine), France a. Etude experimental de la morphogenese de la capsule otique. Salmo spec. (Teleostei), Gallus spec. (Aves) BENZ. G. A. Ph.D. — Zool. Inst, der Univ.. Sahlistr. 8. BERN. Schweiz a. Entwicklungsphysiologie und Biochemie von Letalfaktoren. Drosophila melanogaster (Diptera) h. Biochemie der Regeneration. Xenopus laevis (Anura) BERG, G. G. Ph.D. — Dept of Pharmacol., School of Med.. Univ. of Rochester. P.O. Box 287, Sta. 3. ROCHESTER 20. N.Y., U.S.A. a. Histochemical studies of development: substrate specificity and enzyme inactivation of inorganic meta- and polyphosphatases. Rana spec, Mus spec. (Vertebrate) b. Biochemistry of trimetaphosphate and trimetaphosphatase (general). Mus rattus (Rodentia) BERG. W. E. A.B., M.S., Ph.D.. Prof. — Dept of Zool.. Univ. of CaHf., BERKELEY 4. Cal., U.S.A. BERGEIJK, W. A. van M.S. — Bell Telephone Labs, Inc., MURRAY HILL. N.J.. U.S.A. BERGQUIST. H. Ph.D.. M.I. I.E. — Zool. Inst.. Univ. of Gothenburg. Postgatan 35, GOTEBORG-C, Sweden a. Experimental investigations on the neural tube. (Vertebrate) b. Ultramicroscopical investigations on the integument. Homarus estecus (Crustecee) BERNSTEIN. G. S. B.A.. M.A.. Ph.D. — Dept of Embryol.. Div. of Biol., Calif. Inst, of Technol.. PASADENA 4. Cal., U.S.A. a. Life-span, motility and metabolism of spermatozoa. (Echinodermata, Amphibia, Mammalia) b. Physiology of fertilization. (Echinodermata. Amphibia) BERRILL. N. J. Ph.D.. D.Sc, Prof. — Dept of Zool.. McGill Univ., MON- TREAL. Quebec, Canada H BERTMAR, G. Fil.lic. — Zootom. Inst., Univ. of Stockholm, 70A R^d- mansgatan. STOCKHOLM. Sweden a. Development and morphology of the skeleton of the head. (Characidae, Teleostei) BIEBER. S. B.A.. M.S., Ph.D. — The Wellcome Research Labs, TUCKA- HOE 7, Westchester County, N.Y., U.S.A. a. Nucleic acid metabolism during gametogenesis, embryogenesis and rege^ neration; studies carried out with aid of analogues of purines and pyri- midines, and with radioisotope-labeled nucleic acid derivatives. Rana pipiens (Anura) BIELAnSKA— OSUCHOWSKA, Mrs Z. Mag. of Sci. — Inst, of Histol. and Embryol., Veter. Fac, ul. Grochowska 272. WARSZAWA. Poland a. Histochemical studies on oogenesis. Polydrosus spec, Phyllobius spec. (Curculionidae, Coleoptera) b. Comparative studies on vitellogenesis. Phyllobius spec. Chlorophanus spec. Rhynchites spec. (Curculionidae, Coleoptera) ; Melasoma populi, Agelastica alni (Chrysomelidae, Coleoptera); Pyrrhocoris apterus (Heteroptera) c Studies on hermaphroditism. Capra domestica (Artiodactyla) BIER, K. Dr rer. nat, — Inst, fur Angewandte Zool. der Univ. Naturw. Fak.. Rontgenring 10, WORZBURG, Deutschland BIJTEL, Miss J. H. Dr Sci., M.D.. M.I.I. E. — Anat.-Embryol. Lab. der Rijks Univ., Oostersingel 69. GRONINGEN. Holland a. Investigations concerning the process of outgrowth of the tail with spe- cial reference to the role of the chorda dorsalis and the tail mesoderm. Ambystoma mexicanum, Triton taeniatus, Xenopus laevis (Amphibia) b. Experiments concerning the factors which determine the normal course of the outgrowing pronephric duct. Ambystoma mexicanum, Triton taeniatus, Xenopus laevis (Amphibia) c Development and phylogenetic origin of the columella auris. Ambystoma mexicanum, Triton taeniatus, Xenopus laevis (Amphibia) d. Development of the naso-lacrimal duct. Xenopus laevis (Anura) e. Development of the naso-lacrimal duct. Mus musculus albinus (Rodentia) f. Development of the corpus callosum. Felis domestica (Carnivora) BILLETT, F. B.Sc. Ph.D. — Inst, of Animal Genet.. Univ. Dept of Genet.. King's Buildings. West Mains Rd, EDINBURGH 9, Scotland a. Developmental effects of metabolic antagonists. (Evertebrata, Verte- brata) (in collaboration with Miss M. M. PERRY and C. H. WAD- DINGTON) b. Localization and distribution of /^-glucuronidase in embryos. (Amphibia), Callus domesticus (Aves) c Immunological study of nucleoproteins. Callus spec (Aves) (in collabo- ration with Mrs R. M. CLAYTON— FREEDMAN and A. FROH- LICH) BILLINGHAM, R. E. M.A.. D.Phil. — Dept of Zool. and Comp. Anat.. Univ. Coll. London, Gower St. LONDON W.C. 1, England BIRGE, W. J. B.A., M.S.. Ph.D. — Dept of Zool., Oregon State Coll.. CORVALLIS, Ore.. U.S.A. BISHOP. D. W. Ph.D. — Dept of Embryol.. Carnegie Inst, of Washing- ton, Wolfe and Madison Sts. BALTIMORE 5. Md. U.S.A. a. Physiology and metabolism of spermatozoa. (Mammalia) 15 Bishop-Bos b. Intra-tubal factors influencing sperm motility and transport. (Mammalia) c. Contractife protein and contractile mechanisms of spermatozoa. (Mam- malia) BISHOP, M. W. H. M.A.. Ph.D. — Nat. Inst, for Med. Research, Mill Hill, LONDON N.W. 7, England malia) a. Investigations on gametes, fertilization and early development. (Mam- BLACKLER, A. W. B.Sc. Ph.D. — Dept of Zool.. Queens Univ.. BEL- FAST. N. Ireland a. Origin of germ cells. Rana temporaria, Xenopus laevis (Aniira) b. Endodcrmal regulation. (Amphibia) BLANDAU. R. J. — Dept of Anat., School of Med., Univ. of Washington, SEATTLE 5. Wash.. U.S.A. BLECHSCHMIDT, E. Dr Med.. o.o.Prof. — Anat. Inst, der Univ., Burg- strasse 51. GOTTINGEN. Deutschland a. Entwicklungsbewegungcn der Somiten. Homo sapiens (Primates) b. Entwicklungsbewegungen der Nase. Homo sapiens (Primates) c. Differenzierungsbewegungen der Lymphknoten. Homo sapiens (Prima- tes) (gemeinsam mit L. von FERBER-SCHMIDT) BLOUNT R F. B.A.. M.S.. Ph.D.. Prof. — Dept of Anat.. Med. Branch. Univ. of Texas, GALVESTON. Tex.. U.S.A. BLUNTSCHLI. H. Dr, F.I.I.E., Prof. (Emer.) — Anat. Inst.. Buhlst. 26. BERN, Schweiz (no embryological work in progress) BODDINGIUS. Miss J. B.Sc. — Hubrecht Lab.. Intern. Embryol. Inst.. Janskerkhof 2, UTRECHT. Holland a. Further analysis of contributions of transverse neural fold to the develop- ment of nervous system, neural crest and epidermis. Ambystoma mexi- canum, Triturus spp. (Urodela) BODEMER, C. W. B.A.. M.A.. Ph.D. — Dept of Anat., School of Med.. Univ. of Washington, SEATTLE 5, Wash.. U.S.A. a. Effects of periphery upon development of central nervous system and establishment of nerve morphology and pattern. Cricetus auratus (Rodentia) b. Reciprocal effects of nerve and periphery in limb regeneration. Triturus viridescens (Urodela) BODENSTEIN. D. Ph.D., M.I.I.E. — Chemical Corp. Medical Directorate. Army Chemical Center. MARYLAND, U.S.A. a. Nerve regeneration. Periplancta americana (Orthoptera) b. The role of the corpus allatum hormone in the maturation of eggs. Culex spec. (Diptera) c. Intergeneric grafts of organ discs. (Diptera) d. The role of the prothoracic gland in postembryonic development. Peri- planeta americana (Orthoptera) e. Analysis of tryptophan-derived eye pigments in different species. Musca spp. (Diptera) BODIN. N.-O. Fil.kand. — Inst, for Zoophysiol.. Uppsala Univ.. UPP- SALA. Sweden a. The mechanism of agglutination of spermatozoa. (Mammalia) (in colla- boration with P. E. LINDAHL and S. ROSS) BOELL, E. J. Ph.D.. M.A.. D.Sc. M.I.I.E. — Osborn Zool. Lab., Yale Univ., NEW HAVEN 11. Conn.. U.S.A. 16 a. Changes in mitochondria during development. (Amphibia) b. Enzyme development in the central nervous system. (Amphibia, Aves) c. Functional differentiation of respiratory structures. (Amphibia) BON W. F. M.Sc. — Anat.-Embryol. Inst., Municipal Univ. of Amster- dam. Mauritskade 61, AMSTERDAM O, Holland BONDI, C. Dott., Prof. — 1st. di Biol, gen., Fac. di Med.. S. Pietro. PERU- GIA. Italia a. Rigenerazione. Planaria lugubris (Turbellaria) b. Ricerche sulla tossicita. Bufo spec. Rana spec. Triton spec. (Amphibia) c Trapianti xenoplastici e differenziazione. Triton spec. Rana spec (Am- phibia) d. Tossicita ed anticorpi. Dugesia lugubris (Turbellaria), Bufo spec. (Anura) BONICHON, Miss A. — Lab. de Physiol. Gener., 30. Rue Sainte-Catherine, NANCY, France a. Recherches experimentales sur le developpement cytochimique des lobes optiques. Gallus domesticus (Aves) (en collaboration avec J. F. GAYET) BONIN. W. B.A., M.D., Prof. — Dept d'Histol. et d'Embryol.. Fac. de Med. Univ. de Montreal, 2900 Boulevard du Mont-Royal. MON- TREAL, Canada (no embryological work in progress) BONNER J. T. Ph.D. — Dept of Biol., Princeton Univ.. PRINCETON, N.J.. U.S.A. a. Problems of morphogenetic movements and differentiation. Dictyostelium discoideum (Acrasiales) b. Morphogenesis. (Basidiomycetes) BONS. J. Lie es Sci. — Lab. de Biol. Anim.. Centre d'Etudes Sup. Sci., Avenue Biarnay, RABAT, Maroc a. Developpement experimental du rein. (Reptilia) BOOKHOUT. C. G. A.B.. M.A., Ph.D.. Prof. — Dept of Zool. Duke Univ.. DURHAM, N.C.. U.S.A. a. The development from the egg to the sixty-day stage. Egg deposition, culture methods, day to day observations and records of living larvae and juveniles, study of fixed and sectioned material. Marphysa regalis (Polychaeta) b. Larval development and the effect of variations in temperature, salinity, and diet on molting frequency and time of development. Balanus spp. (Cirripedia, Crustacea) BORDEN. J. van der — Anat.-Embryol. Inst.. Municipal Univ. of Amster- dam, Mauritskade 61. AMSTERDAM O, Holland a. Experiments designed to test relations of some inhibitors of embryonic development to the effect of X-rays. (Urodela, Rodentia) (in collabora- tion with H. A. L. TRAMPUSCH) BORGHESE, E. M.D.. Ph.D., M.I.I.E. — 1st. di Anat. umana normale, Via Forlanini 8, PAVIA, Italia a. Development of hemopoietic organs and gonads in the lethal homozygous form of the mutation W. Mus musculus (Rodentia) BOSCHWITZ, Miss B. D. M.Sc. — Dept of Zool., Hebrew Univ.. JERU- SALEM. Israel a. The ultimobranchial body. (Anura) 17 Bos-Bro ROSE. Miss A. B.Sc.(Hons) — Dept of Zoology, Presidency Coll., College St. CALCUTTA 12, India a. Cellular factors in morphogenesis. (Amphibia) (in collaboration with S. MOOKERJEE) BOSE, A. M.Sc. — Dept of Zool.. Presidency Coll., College St, CALCUT- TA 12, India a. Biochemical studies on the yolk granules. Gallus gallus (Aves) b. Localised thermal exposures of the blastoderm. Gallus gallus (Aves) BOTERENBROOD, Miss E. C. M.Sc. — Hubrecht Lab., Intern. Embryol. Inst.. Janskerkhof 2, UTRECHT, Holland a. Organization of prosencephalic structures after dis- and re-aggregation of the prosencephalic part of the neural plate. Triturus alpestris (Uro- dela) BOUILLON. J. Lic.Sci.Zool. — Lab. de Zool., Fac. des Sci.. Inst. ZooL Torley-Rousseau. Univ. libre de Bruxelles, 50 Avenue F. D. Roosevelt, BRUXELLES, Belgique BOUIN, P. Dr, Prof. (Emer.) — VENDRESSE. Ardennes, France BOUNOURE, L. Prof. — Lab. de Biol, gen., Inst, de Zool. et de Biol. gen.. Fac. des Sci., 12 Rue de I'Universite, STRASBOURG, France a. Initial development: primordial germ-cells, development of the gonads. (Amphibia) BOVING. B. G. A.B., M.D., M.I. I.E. — Dept of Embryol., Carnegie Inst. of Washington, Wolfe and Madison Sts, BALTIMORE 5. Md. U.S.A. a. Blastocyst spacing, orientation and implantation mechanisms. Ocyctolagus cuniculus (Lagomorpha) b. Relation of trophoblast invasion to bloodvessels underlying uterine epi- thelium, and the anatomical and chemical basis for it. Oryctolagus cuni- culus (Lagomorpha) c. Identification and function of non-cellular blastocyst coverings. Orycto- lagus cuniculus (Lagomorpha) BOYD. J. D. M.A., M.Sc, M.D.. M.I. I.E., 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) BOYDEN. E. A. Ph.D., Prof. — (Emer. Prof.) Inst, of Anat., School of Med., Univ. of Minnesota, MINNEAPOLIS 14. Minn., U.S.A. — (Visit. Prof.) Med. School, Univ. of Washington. SEATTLE 5, Wash.. U.S.A. BOYER, C. C. B.S., M.A., Ph.D.. Prof. — Dept of Anat.. School of Med., Univ. of West Virginia, MORGANTOWN, W.Va., U.S.A. a. Structure of the renal glomerulus. (Mammalia) h. Morphological changes in pathological renal glomeruli, by plastic recon- struction. BRACHET, J. L. A. M.D.. D.Sc. F.I.I.E.. Prof. — Lab. de Morphol. anim.. Univ. libre do Bruxelles, 1850 Chaussee de Wavre, BRUXELLES- Auderghem, Belgique. a. Studies on the metabolism of lethal hybrids. (Amphibia) b. Action of ribonuclease on development. Rana spec, Ambystoma spec, c Role of -SH groups in morphogenesis. (Amphibia) d. Biochemical changes in explants undergoing sub-lethal cytolysis. (Am- phibia) 18 BRADEN, A. W. H. M.Sc. Ph.D. — Sheep Biol. Lab., C.S.I.R.O.. PROSPECT, N.S.W.. Austraha a. Fertihzation; interaction between sperms; genetic differences in the mor- phology and physiology of the gametes. Mas musculus (Rodentia) BRAHMA, S. K. M.Sc. D.Phil., Ph. D. — Inst, of Animal Genet., Univ. Dept of Genet., King's Buildings. West Mains Rd. EDINBURGH 9, Scotland a. Study on the process of evocation with special reference to diffusion. Ttitmus alpestris, Xenopus laevis, Ambystoma spec. (Amphibia) b. On lens induction. Tciturus alpesttis, Xenopus laevis, Ambystoma spec. (Amphibia) c. Transfer of substances during induction. (Amphibia) (in collaboration with J. L. SIRLIN) BRAMBELL, F. W. R. B.A.. Ph.D.. D.Sc, F.R.S.. F.I.I.E.. Prof. — Agr. Res. Council Unit of Embryol., Dept of Zool., Univ. Coll. of North Wales, BANGOR, Caernarvonshire, N.Wales a. Immunological relations of mother and young. (Mammalia) BRESCH, D. Lie. es Sci. — Lab. de Zool.. Inst, de Zool. et de Biol. gen.. Fac. des Sci.. 12 Rue de I'Universite, STRASBOURG. France BRETSCHNEIDER. L. H. Prof. — Centrum voor Electronenmicroscopie, Janskerkhof 3. UTRECHT. Holland a. Pathogenesis of egg cells. Limnaea stagnalis (Gastropoda) BREWIN. B. I. M.Sc. — Dept of Zool., Univ. of Otago, DUNEDIN. New Zealand a. Embryology and life history of a truly viviparous compound form. Hypsistozoa fasmeriana (Ascidia) BRIEN. P. L. Dr Sci.Zool., F.I.I.E.. Prof. — Lab. de Zool.. Fac. des Sci., Inst, de Zool. Torley-Rousseau, Univ. libre de Bruxelles, 50 Av. F. D. Roosevelt, BRUXELLES, Belgique BRIGGS, R. W. Ph.D., M.I.I.E. — Dept of Zool., Indiana Univ., BLOO- MINGTON. Ind.. U.S.A. BRIONES, H. M.D. — Inst, de Biol. ..Juan Noe", Univ. de Chile, Casilla 2988, SANTIAGO. Chile BRODOWA. Mrs Ch. GRABIE M.Ph. — Zaklad Zool. Ogolnej. Inst. Zool.. Uniw. we Wroclawiu, ul. Sienkiewicza 21, WROCLAW. Poland a. Morphogenetical functions of the thyroid gland, especially hormonal action on blood. Rana spec. (Anura) BROEK. A. J. P. V. d. F.I.I.E.. Prof. (Emer.) — Biltstraat 109. UTRECHT. Holland BR0NDSTED. H. V. Dr Phil.. F.I.I.E.. Prof. — Inst, for Aim. Zool.. Uni- versitetsparken 3. COPENHAGEN ^. Denmark a. Regeneration. (Planariidae, Plathelminthes) b. Developmental physiology. Spongilla spec. (Porifera) c. Development of the brain. (Mammalia) BROOKBANK. J. W. B.A.. M.S., Ph.D. — Dept of Biology. Univ. of Florida. GAINESVILLE. Florida, U.S.A. a. Effects of antisera on egg metabolism. Lytechinus variegatus (Echinoi- dea) h. Localization of antigens within the unfertihzed egg. Strongylocentrotus purpuratus (Echinoidea) 19 Bro-Car BROUANT. J. F. Lie. es Sci. — Lab. d'Histol.. Dep. d'Embryol.. Fac. de Med.. 31 Rue Lionnois, NANCY (Meurthe 6 Moselle). France a. Action de ccrtaines .substances chimiques sur la cyto-differenciation em- bryonnaire. (Amphibia) BROUVVER. P. J. Med.Drs — Anat.-Embryol. Lab. of the Univ., Fac. of Med.. Wasscnaarscweg, Boerhaavekwartier, LEIDEN, Holland a. Development of thyroid gland and teeth (investigations with radioactive isotopes), (in collaboration with J. DANKMEIJER) BROWN. J. W. A.B., M.A.. Ph.D. — Dept of Anat.. School of Med., Univ. of Missouri. COLUMBIA. Mo. U.S.A. a. Development of the nucleus of the spinal tract of trigeminal nerve. Homo sapiens (Primates) BRUNOLD, Miss E. Dr phil. — Zool. Inst.. Eidg. Technische Hoch.schule. Universitatsstr. 2, ZURICH. Schweiz a. Qualitative und quantitative Untersuchungen iiber die Aminosauren bei bestrahlten und unbestrahlten Eiern und Embryonen. Drosophila melano- gaster (Diptera) BRUNST, V. V. Dr Biol. — Roswell Park Memorial Inst., 666 Elm St, BUFFALO 3. N.Y.. U.S.A. a. Experimental developmental morphology. Siredon mexicanum (Urodela) h. Development and pathology. Siredon mexicanum (Urodela) c. Regeneration. Siredon mexicanum (Urodela) BRYAN, J. H. D. B.Sc, M.A.. Ph.D. — Dept of Genetics. Iowa State Coll., AMES. Iowa. U.S.A. a. Cytochemical studies of gamete formation. Mus musculus (Rodentia) b. Cytochemical studies of X-ray effects on mitosis and meiosis. Mus musculus (Rodentia) c. X-ray induced chromosome-translocation effects. Mus musculus (Roden- tia) d. Nucleic acid-protein ratios during growth and differentiation. Mus mus- culus (Rodentia) BUJARD, E. Prof. — Inst. d'Histol. et d'Embryol., ficole de Med.. GEN£VE, Suisse BU5JO, W. B.Sc, Ph.D., Prof. — Dept de Histol. y Embriol.. Fac. de Med., MONTEVIDEO, Uruguay. S. America BURDON-JONES, C. B.Sc, Ph.D. — Marine Biol. Station, Univ. Coll. of North Wales, MENAI BRIDGE, Anglesey, N. Wales a. Embryology. ( Hemic hordata. Gastropoda) BURGOS, M. — Dept of Anat., Harvard Univ.. Med. School. 25 Shattuck St. BOSTON 15, Mass., U.S.A. BURNS, R. K. A.B., Ph.D., F.I.I. E. — Dept of Embryol.. Carnegie Inst, of Washington, Wolfe and Madison Sts, BALTIMORE 5, Md. U.S.A. BUTLER, E. G. Ph.D., ScD.. F.I. I.E., Prof. — Dept of Biol.. Princeton Univ.. PRINCETON. N.J.. U.S.A. 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. Regression (reduction) and subsequent reconstitution. Clavelina lepadi- formis (Tunicata, Urochordata) c Effects of ultraviolet radiation on limb development and limb regenera- tion. (Urodela) 20 BUTLER, H. M.A.. M.D., B.Chir. — Dept of Anat., Univ. of Khartoum, KHARTOUM, Sudan a. The reproductive cycle and early development. Galago senegalensis senegalensis (Primates) b. The development of the intestine. Hyrax spec. (Hyracoidea) BUTROS, J. M. M.A.. Ph.D. — Biol. Dept. American Univ., BEIRUT. Lebanon a. Cytoplasmic viscosity in the egg during suppressed respiration. (Echi- noidea) b. Measurement of electrical potential in regenerating planaria. Dugesia tigrina ( Tricladidea) BtiYOKoZER, Miss L M.D. — Histol. ve Embriol. Enstitiisu, Tip Fakiil- tesi. Cebeci, ANKARA, Turkey (no embryological work in progress) BYCZKOWSKA— SMYK, Mrs W. Mgr. — Zaklad Anat. Porownawczej U.J. im H. Hoyera, sw. Anny 6, KRAKOW, Poland CAIRNS, J. M. A.B., M.S.. Ph.D. — 205 Calvert Boulevard. Tonawanda. NEW YORK, N.Y., U.S.A. CALLAN, H. G. M.A., D.Sc, Prof. — Dept of Zool., The University, ST ANDREWS. Fife, Scotland a. Oocyte nuclei and lampbrush chromosomes. CAMBAR, R. Dr, M.I. I.E.. Prof. — Lab. de Biol, gener.. Fac. des Sci. de Bordeaux. 40 Rue Lamartine, TALENCE, Gironde, France a. Etude descriptive et experimental de la morphogenese du mesonephros. Rana spec. Alytes spec, Discoglossus spec, Xenopus spec. (Anura) h. Etude du developpement du systeme pronephretique, en particulier de I'uretere primaire. (Anura) c Involution ou transformations de Tappareil excreteur pendant la meta- morphose. (Anura) d. Modalites et facteurs de formation de I'ostium. (Anura) e. Table chronologique du developpement normal. Alytes spec. (Anura) f. Recherches descriptives sur le developpement. Gambusia spec. (Tele- ostei) CAMOSSO, Miss M. E. ScDr — Inst, of human Anat.. Fac. of Med.. Poli- clinico. BARI. Italy a. Analysis of the morphogenesis of the wing. Callus domesticus (Aves) CAMPENHOUT. E. van Dr. F.I.I.E.. Prof. — Inst. d'Anat., Univ. de Louvain, 38 Rue des Recollets, LOUVAIN, Belgique a. Innervation of the lungs. b. Innervation of the digestive tract. c Development of the embryo. Crocodilus spec. (Reptilia) d. Development of the visceral nervous system. Homo sapiens (Primates) e. Development of the acoustic nerve. (Reptilia, Mammalia) CARRANO, Miss F. Dr — 1st. di Zool.. Via Archirafi 18. PALERMO. Italia CARTER. T. C. M.A.. Ph.D.. D.Sc. — Radiobiol. Res. Unit., Atomic Ener- gy Res. Establ.. HARWELL. Berkshire, England a. Developmental study of a radial hemimelia mutant. Mus musculus (Ro- dentia) ' b. Developmental study of the myelencephalic blebs mutant. Mus musculus (Rodentia) 21 Cas-Chi CASPARI, E. W. Ph.D., Prof. — Dept of Biol., Wesleyan Univ.. MIDDLETOWN, Conn., U.S.A. a. Mitochondria in development and heredity. Mus musculus (Rodentia) b. Development of pigment granules in the testis. Ephestia Kuhniella (Lepidoptera) c. Development of a blind mutant. Mus musculus (Rodentia) CASTIGLI— PITOTTI, Mrs M. Dott. — 1st. di Biol, gen., Fac. di Med.. S. Pietro, PERUGIA, Italia a. Natura della gastrulazione senza segmentazione. Petromyzon [luviatilis (Cyclostomata) h. Azione e reazione nella metamorfosi. Bufo vulgaris (Anura) c. Morfogenesi proteica. CASTIGLIONI, Miss M.C. Dr — 1st. di Genet.. Univ. di Milano, Via Celo- ria 10, MILANO. Italia a. Experimental study of development of pseudotumors. Drosophila spec. (Diptera) b. Transplantation of eye discs between stocks with developmental abnor- malities of the eye. Drosophila spec. (Diptera) c. Paper chromatography of mutants. Drosophila spec. (Diptera) GATE, G. ten M.D., M.I. I.E. — Anat.-Embryol. Inst., Municipal Univ. of Amsterdam, Mauritskade 61. AMSTERDAM O. Holland a. Study about the origin of the specific lens protein a-crystallin and of other organ-specific proteins in the development. (Amphibia) , Gallus spec. (Aves) CAUNA, N. M.D., M.Sc. — Dept of Anat., Med. School, King's Coll., Univ. of Durham, NEWCASTLE upon Tyne. England a. Development of cutaneous receptor organs and nerves. Homo sapiens (Primates) b. Early development of limbs. Homo sapiens (Primates) and other spp. (Vertebrata) C£AS, Miss M. P. Ph.D. — 1st. di Anat. Comp.. Via Archirafi 18, PALER- MO, Italia a. Biochemical activities of the different presumptive territories of the young gastrula. Discoglossus pictus (Anura) CENTAMORI, M. Dott. — 1st. di Biol, gen., Fac. di Med., S. Pietro, PERUGIA, Italia CHALKLEY. D. T. B.A., M.A., Ph.D. — Univ. of Notre Dame, NOTRE DAME. Ind.. U.S.A. CHAMBERS, W. W. — Dept of Anat., School of Med.. Univ. of Pennsyl- vania, PHILADELPHIA 4, Pa. U.S.A. CHANDEBOIS, Miss R. Lie. es Sci, — Lab. de Zool. gener. de la Fac. des Sci., Place Victor Hugo, MARSEILLE, France CHANG. C. Y. M.S., Ph.D. — Dept of Zool.. State Univ. of Iowa, IOWA CITY, Iowa, U.S.A. a. Hypothalectomy in embryos. Rana spec. Xenopus spec, Bufo spec (Anura) b. The mechanism of ovulation. Xenopus spec. (Anura) (in collaboration with E. WITSCHI) c Sex inversion by steroid hormones. (Anura) CHANG, M. C. Ph.D. — Worcester Foundation for Exper. Biol., 222 Maple Ave, SHREWSBURY, Mass., U.S.A. 22 a. Physiology of fertilization and cleavage. Oryctolagus cuniculus (Lago- morpha) b. Fertilizability. Oryctolagus cuniculus (Lagomorpha) c. Parthenogenetic development of blastocysts. Oryctolagus cuniculus (Lagomorpha) d. Effects of low temperatures on heart beat of 10 day old embryos. Oryc- tolagus cuniculus (Lagomorpha) e. Fertilization and parthenogenesis. Mustela furo L. (Carnivora) f. Irradiation of spermatozoa and ova in vitro. Oryctolagus cuniculus (Lagomorpha) CHANG, T. K. Dr — Chinese Peking Union Med. College, PEKING, China CHANMUGAM, P. K. M.Sc. M.R.C.S., L.R.C.P., L.M.S. — Dept of Anat., Fac. of Med.. Univ. of Ceylon. Kynsey Rd. COLOMBO 8, Ceylon, India CHAPMAN, A. O. Ph.D. — Dept of Anat., Coll. of Med., Univ. of Nebraska. OMAHA 5, Nebraska, U.S.A. CHASE, H. B. Ph. D., Prof. — Arnold Biol. Lab., Brown Univ., PROVI- DENCE 12, R.I., U.S.A. a. A study of anophthalmia and microphthalmia. Mus musculus (Rodentia) b. A study of skin and its derivatives with emphasis on hair development and pigment distribution. Mus musculus (Rodentia) c. Radiation effects on hair follicle morphogenesis. Mus musculus. Cavia cobaya (Rodentia) CHEN, P. S. DrPhil. — Zool.-vergl.Anat. Inst.. Naturw. Fak., Univ. Zurich, Kiinstlergasse 16, ZURICH 6, Schweiz a. Xenoplastische Chimaren. (Amphibia) (in Zusammenarbeit mit F. BALTZER, Bern) CHENEY. R. H. B.S., A.M., S.M.. Sc.D.. Prof. — Dept of Biol., Brook- lyn Coll., Bedford Ave and Ave H, BROOKLYN 10, N.Y.. U.S.A. a. Retardation effect of dimethylated xanthines on development. Arbacia punctulata (Echinoidea) b. Theophylline, theobromine, and caffeine effects on fecundity and deve- lopment. 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 ferti- lized egg and early embryology. Arbacia punctulata (Echinoidea) e. Effect of x-ray irradiation on development of methylated xanthine-treated eggs. Arbacia punctulata (Echinoidea) f. Effect of caffeine on development. Rana pipicns (Anura) CHIQUOINE, A. D. B.A., Ph.D. — Dept of Anat.. Washington Univ., ST LOUIS, Mo., U.S.A. a. Electron microscopy and cytochemistry of differentiating cells. CHISHIMA, K. Prof. — Lab. for Zool., Dept of Agricult., Gifu Univ.. Naka-cho, GIFU, Gifu-ken, Japan a. New cell (spermatogonia) -formation from living substances (fatty tis- sue). Bombyx mod L., Pachytilus danicus L. (Insecta) b. New cell (hemocytoblast) -formation from yolk spheres in embryo and tadpole. Rana nigromaculata Hall (Anura) 23 Cho-Col CHOUNICK. A. A.B.. Ph.D. - Dept of Zool., Umv. of Conn.. STORRS, Conn.. U.S.A. a. Developmental effects of pseudoallelic loci. Drosophila melanogaster (Diptera) b. Nutritional requirements associated with morphological mutants and lethals. Drosophila melanogaster (Diptera) CHOWDHURY. Miss M. B.Sc.(Hons) — Dept of Zoology, Presidency Coll.. College St, CALCUTTA 12, India a. Physiology of cell-contact. (Porifera) (in collaboration with S. MOO- KERJEE) CHUANG HSIAO HUI Dr rer. nat.. Dr rer. nat. habil., F.I. I.E. — Lab. of Devclopm. Physiol.. Inst, for Exper. Biol.. Acad. Sinica, 865 Chang Ning Rd, SHANGHAI, China CHURCH. G. A.B, — Dept of Biol. Sci., Stanford Univ.. STANFORD, Cal.. U.S.A. CICADA— LEONARDI, Mrs. M. Dott.Sci.Biol.. M.I.I.E. — Lst. di Zool. e Anat. Comp.. Univ. di Milano, Via Celoria 10. MILANO. Italia a. Protein changes in embryonic development. (Insecta, Echinodermata, Amphibia, Aves) b. Electron microscopy of differentiation. (Aves) CITTERIO, P. Grad.stud. — 1st. di Zool. e Anat.comp.. Univ di Milano, Via Celoria 10, MILANO, Italia a. Determination in early development. (Echinodermata, Amphibia) CLARA, M. Dr. Prof. — Inst, of Histol. and Embryol., Univ. of Istanbul, ISTANBUL-Beyazit, Turkey (no embryological work in progress) CLARK, H. B.A., Ph.D., Prof. — Dept of Zool., Univ. of Connecticut, STORRS. Conn., U.S.A. a. Nitrogen metabolism of embryos. (Reptilia, Aves) b. Factors affecting reaggregation of segregated cells in tissue culture. c. Phase contrast cinematography of differentiating cells. Gallus domesticus (Aves) d. Ontogenesis of enzymes. Gallus domesticus (Aves) (in collaboration with M. GOLDIE) CLARKE ERASER. F. M.D. — Dept of Genetics, McGill Univ., MON- TREAL. Quebec. Canada CLAVERT. J. Dr en Med.. Dr es Sci., M.I.I.E.. Prof. — Inst. d'Embryol.. Fac. de Med., 1 Place de I'Hopital, STRASBOURG, France a. Formation de I'oeuf (Role de I'hormone femelle en vitellogenese), (Pisces), (Reptilia), Columba spec. Anas spec. Gallus spec. (Aves) h. Recherches sur le determinisme de la symetrie bilaterale. (Pisces. Rep- tilia, Aves) CLAYTON— FREEDMAN, Mrs R. M. M.A. — Inst, of Animal Genet., Univ. Dept of Genet., King's Buildings. West Mains Rd. EDIN- BURGH 9. Scotland a. Studies of differentiation by immunological and other techniques. Triton alpestris (U rode la) h. Studies of a locus in a highly inbred line by immunological and allied techniques: the loci ..pink eye", ,, luxate", and ..agouti" in CBA mice and , .albino" in an inbred strain of this laboratory. Mus musculus (Rodentia) 24 c. Differentiation in tissue culture. Gallus spec. (Aves) (in collaboration with A. FROHLICH) d. Studies of differentiation by immunological and chromatographic tech- niques. Mus musculus (Rodentia) e. Immunological study of nucleoproteins. Gallus spec. (Aves) (in colla- boration with F. BILLETT and A. FROHLICH) CLEAT, N. D. B.Sc. — Dent of Genet.. The University, GLASGOW W. 2, Scotland (U.K.) CLEGG. E. J. M.B., Ch.B. — Dept of Anat., Univ. of Liverpool. LIVER- POOL. England a. Age changes in the fructose content of the coagulating gland. Rattus spec. (Mammalia) h. Effects of low atmospheric pressure on the reproductive and endocrine systems of laboratory animals. (Mammalia) CLEMENT. A. C. Ph.D.. M.I.I.E., Prof. — Dept of Biol., Emory Univ.. ATLANTA, Ga. U.S.A. a. Localization of morphogenic factors: experimental analysis. Ilyanassa obsoleta (Gastropoda) b. Distribution of mitochondria and lipid droplets during early development. Ilyanassa obsoleta (Gastropoda) (in collaboration with F. E. LEH- MANN) c. Cytochemical and physiological studies of early development. Ilyanassa obsoleta (Gastropoda) CLEMENTS. L. P. Dr — Dept of Anat.. School of Med., The Creighton Univ., OMAHA, Nebraska, U.S.A. COHEN, A. I. Ph.D. — Dept of Anat., Med. School, Washington Univ., ST LOUIS 10, Mo.. U.S.A. COHN, S. A. B.S., M.S., Ph.D. — Div. of Anat., Med. Units Div.. Fac. of Biol. Sci., Univ. of Tennessee, MEMPHIS 3, Tenn., U.S.A. a. The development of glands of ectodermal origin. Gallus domesticus (Aves), Mus musculus (Rodentia) b. Cytological. cytochemical and histochemical studies on the initiation of secretory activity in developing ectodermal glands. Mus musculus (Ro- c. Studies of tooth development. Mus musculus (Rodentia) dentia) COLOMBO. G. Dr Biol.Sci. — 1st. di Zool. e Anat. comp.. Fac. di Sci., Via Loredan 10. PADOVA, Italia a. Chromosomes in early development. (Amphibia) h. Effects of hormones on cleavage and early development. (Amphibia) c. Gametogenesis. (Arthropoda) COLWIN. A. L. Ph.D., M.I.I.E., Prof. — Dept of Biol., Queens Coll.. Flushing 67, L.I.. NEW YORK. N.Y., U.S.A. a. Fertilization: sperm-egg association and sperm penetration; cortical changes; membrane changes, lytic aspects. Living material and electron microscope studies. Enteropneasta, Echinodermata. Annelida) (in col- laboration with Mrs L. H. COLWIN) COLWIN, Mrs L. HUNTER Ph.D., Prof. — Dept of Biol. Queens Coll., Flushing 67, L.I., NEW YORK. N.Y., U.S.A. R a. Fertilization: sperm-egg association and sperm penetration; cortical chan- ges; membrane changes; lytic aspects. Living material and electron microscope studies. ( Enter opneusta, Echinodermata, Annelida) (in col- laboration with A. L. COLWIN) 25 Con-Cro CONAWAY. C. H. B.S.. Ph.D.. — Dept of Zool.. Univ. of Missouri, COLUMBIA. Mo.. U.S.A. CONDORELLI, M. Dott. in Med. — Semeiotica Medica, Universita di Ro- ma, Policlinico Umberto I, ROMA. Italia a. Circolazione fetale e neonatale. Cavia spec. Ovis spec, Canis spec. Homo sapiens (Mammalia) CONINCK, L. A. P. De Dr Sc, Prof. — Lab. voor Zool.. Afd. Morphol., Universiteitstraat 14, GENT, Belgie a. Regeneration. (Urodela) CORLISS C. E. B.S.. M.S.. Ph.D. — Div. of Anat.. Med. Units Div.. Fac of Biol. Sci., Univ. of Tennessee, MEMPHIS 3, Tenn., U.S.A. a. Study of mitotic activity and its relation to morphogenesis in young embryos. Mus norvegicus albinus (Rodentia) h. Colchicine toxicity to embryonic tissue. Mus norvegicus albinus (Ro- dentia) c Study of mitotic activity in the central nervous system and its relation to morphogenesis and virus susceptibility. Gallus domesticus (Aves) CORNER G. W. A.B., M.D., D.Sc. F.I. I.E., Prof. — Rockefeller Inst, for Med. Res., 66th St and York Ave, NEW YORK 21. N.Y.. U.S.A. a. Embryology of twins and other multiple births. Homo sapiens (Primates) CORNER. Jr. G. W. — Dept of Embryol., Carnegie Inst, of Washington, Wolfe and Madison Sts, BALTIMORE 5. Md, U.S.A. a. Determinations of blood, amniotic and intervillous space pressures throughout pregnancy. Macaca mulatta (Primates) (in collaboration with Miss E. M. RAMSEY and W. N. LONG) COSTELLO. D. P. Ph.D.. F.I.I.E.. Prof. — Dept of Zool., Univ. of North Carolina, CHAPEL HILL. N.C., U.S.A. a. Studies in experimental cytology. Polychoems spec. (Acoela, Turbella- ria). Nereis limbata, Chaetopterus spec. (Polychaeta) COSTLOW. J. D. A.B.. Ph.D. — Duke Univ. Marine Lab.. BEAUFORT, N.C.. U.S.A. a. Larval development under normal and experimental conditions. Balanus spp. (Cirripedia, Crustacea) COTRONEI. G. Dott.. F.I.I.E.. Prof. — 1st. di Anat. comp. dell'Univ.. Fac di Sci.. Via Borelh 50. ROMA. Italia COULOMBRE. A. J. B.S.. M.S., Ph.D. — Dept of Anat.. Yale Univ. School of Med.. 333 Cedar St, NEW HAVEN 11, Conn.. U.S.A. a. Mechanical factors in intestinal morphogenesis during late development. Ga//us domesticus (Aves) (in collaboration with J. L. COULOMBRE) b. Developmental physiology of corneal transparency. Gallus domesticus (Aves) (in collaboration with J. L. COULOMBRE) c Mechanical factors in brain morphogenesis. Gallus domesticus (Aves) (in collaboration with J. L. COULOMBRE) d. Factors underlying collagenous fiber patterns in the developing cornea. Gallus domesticus (Aves) (in collaboration with J. L. COULOMBRE) e. Electron microscopic study of the developing intestinal mucosa. Gallus domesticus (Aves) (in collaboration with J. L. COULOMBRE) f. Mechanical factors underlying skull morphogenesis. Gallus domesticus (Aves) (in collaboration with E. S. CRELIN) g. Developmental histochemistry of the cornea. Gallus domesticus (Aves) (in collaboration with J. L. COULOMBRE) 26 COULOMBRE, J. L. — Dept of Anat., Yale Univ. School of Med.. 333 Cedar St, NEW KAVEN 11, Conn., U.S.A. a. Mechanical factors in intestinal morphogenesis during late development. Gallus domesticus (Aves) (in collaboration with A. J. COULOMBRE) b. Developmental physiology of corneal transparency. Gallus domesticus (Aves) (in collaboration with A. J. COULOMBRE) c. Mechanical factors in brain morphogenesis. Gallus domesticus (Aves) (in collaboration with A. J. COULOMBRE) d. Factors underlying collagenous fiber patterns in the developing cornea. Gallus domesticus (Aves) (in collaboration with A. J. COULOMBRE) e. Electron microscopic study of the developing intestinal mucosa. Gallus domesticus (Aves) (in collaboration with A. J. COULOMBRE) f. Developmental histochemistry of the cornea. Gallus domesticus (Aves) (in collaboration with A. J. COULOMBRE) COUNCE, Miss S. J. M.A.. Ph.D. — Osborn Zool. Lab.. Yale Univ., NEW HAVEN 11, Conn.. U.S.A. a. Egg development in the ovaries of female steriles. Drosophila spec. (Diptera) b. Developmental effects of female-sterility genes. Drosophila spec. (Dip- tera) COURRIER. R. Prof. — Lab. de Morphol. exper. et Endocrinol., Coll. de France, Place Marcelin Berthelot, PARIS Ve, France CRAFTS, R. C. — Dept of Anat.. Coll. of Med., Univ. of Cincinnati. Eden Avenue. CINCINNATI 19, Ohio, U.S.A. (no embryological work in progress) CRELIN, E. S. Ph.D. — Dept of Anat., Yale Univ. School of Med., 333 Cedar St, NEW HAVEN 11. Conn., U.S.A. a. Mechanical factors underlying skull morphogenesis. Gallus domesticus (Aves) (in collaboration with A. J. COULOMBRE) b. Development of bone and joints. Mus musculus (Rodentia) CRESP, ]. Lie. es Sci. — Lab. de Zool. gener. de la Fac. des Sci., Place Victor Hugo, MARSEILLE, France CRISP, D. J. M.A., Ph.D. — Marine Biol. Station, Univ. Coll. of North Wales, MENAI BRIDGE, Anglesey, N.Wales a. Rate of development of egg masses in vitro. Balanus spec, Chtha- malus stellatus (Cirripedia) b. Induction of breeding by temperature conditioning. fMainly Cirripedia) CROISILLE, Y. Lie. es Sci. — Lab. d'Embryol. exper. du Coll. de France. et Lab. d'Embryol. et de Teratol. exper. du C.N.R.S., 1 1 Place Marcelin Berthelot, PARIS Ve, France a. Culture de foie embryonnaire sur des milieux a base de divers extraits d'organes. Galus gallus (Aves) b. Culture d'organes embryonnaires sur des extraits homo- et heterologues. Gallus gallus (Aves) CROWDER, R. E. M.D. — U. S. Naval Hospital, CAMP LEJEUNE, N.C., U.S.A. a. Sources of cellular contributions to the adrenal anlage. Homo sapiens (Primates) h. Effect of exogenous hormones upon the adrenal development in pouch young. Opossum virginiana (Marsupialia) 27 Cro-Dcn CROWELL. P. S. — Dcpt of Zool. Indiana Univ.. BLOOMINGTON. Ind.. U.S.A. CSAPO. A. I. M.D. — Dept of Embryol., Carnegie Inst, of Washington. Wolfe and Madison Sts. BALTIMORE 5. Md. U.S.A. CURTIS. A. S. G. B.A. — Dept of Anat.. Univ. Coll. London. LONDON W.C. 1. England a. Surface properties, movement and adhesion of embryonic cells and can- cerous tissues. (Amphibia. Aves) b. Dissociation and reaggregation of embryos. (Amphibia, Aves) CURY. G. — Lab. d'HistoL Dep. d'Embryol., Fac. de Med.. 31 Rue Lionnois, NANCY (Meurthe & Moselle). France a. Regulation de I'oeuf. (Amphibia) DAINTY, J. M.A. — Biophysics Unit, Univ. of Edinburgh, King's Build- ings. West Mains Rd, EDINBURGH 9. Scotland (no embryological work in progress) DALCQ. A. M. M.D.. F.I. I.E.. Prof. — Lab. d'Anat. et d'Embryol.. Fac. de Med., de rUniv.. 97 Rue aux Laines, BRUXELLES, Belgique a. Cytochemistry of early stages of development. (Ascidiae, Mammalia) DALTON, H. C. Ph.D. — Dept of Zool., New York Univ., NEW YORK. N.Y.. U.S.A. DAMAS, H. F. C. Dr Sc Agr.Zool., M.I. I.E.. Prof. — Dept Morphol. des Chordes, Inst, de Zool. Ed. Van Beneden, Fac. des Sci., 22 Quai Ed. Van Beneden, LIfiGE, Belgique a. Etude descriptive et comparative du developpement. Petromyzon mari- nus, Lampetra fluviatilis, L. planeri (Cyclostomata) D'AMELIO, V. Ph.D. — 1st. di Anat. Comp., Via Archirafi 18. PALER- MO. Italia a. Biochemical activities of the presumptive territories of the young gastrula. Discoglossus pictus (Antira) DAN, Mrs J. C. Ph.D. — Embryol. Section. Dept of Biol.. Fac. of Sci.. Tokyo Metropolitan Univ.. Sctagaya-ku, TOKYO, Japan a. Electron-microscope observation of spermatozoa under various experi- mental conditions. (Echinodermata, Mollusca. Annelida) b. Study of egg-membrane lysin of spermatozoa. (Mollusca) DAN. Mrs J. C. Ph.D. — Embryol. Section. Dept of Biol.. Fac. of Sci., Tokyo Metropolitan Univ., Setagaya-ku, TOKYO, Japan a. Mitotic spindle isolation and analysis. (Echinoidea) h. Formation of mitotic apparatus and SH-proteins. (Echinoidea) c. Mechanism of polar body formation. (Mollusca) D'ANCONA, U. Dr Nat.Sci.. M.I. I.E., Prof. — 1st. di Zool. e Anat. comp.. Fac. di Sci., Via Loredan 10, PADOVA, Italia a. Differentiation of the gonad. (Vertebrata. esp. Pisces) h. Embryology. (Teleostei, Ganoidea, Amphibia) DANKMEIJER, J. Med.Dr, Prof. — Anat.-Embryol. Lab. of the Univ. of Leyden, Fac. of Med., Wassenaarseweg, Boerhaavekwartier, LEIDEN, Holland a. Normal and abnormal development of the heart. Homo sapiens and other Animalia (in collaboration with J. A. LOS) b. Development of thyroid gland and teeth (investigations with radioactive isotopes) (in collaboration with P. J. BROUWER). c. Development of uterus. Homo sapiens (Primates) 28 d. Heart and vessels in congenital malformations. Homo sapiens (Primates) (in collaboration with H. A. SNELLEN, Miss A. DEKKER and Miss H. C. vanlNGEN) DASGUPTA. B. M.Sc. — Dept of Parasitol., London School of Hygiene and Tropical Med., Keppelstreet ( Gowerstreet ) , LONDON W.C. 1, England a. Cytochemical investigations on development. Plasmodium gallinaceum, Plasmodium cynomolgi, Eimeria stidie (Sporozoa) DAVIES. D. H. M.Sc, Ph.D. — Division of Fisheries, Beach Road, Sea Point. CAPE TOWN, South Africa a. Embryology. Sardinops ocellata (Pappe) (Isospondyli, Neopterygii) DAVIES, D. V. Prof. — Dept of Anat., St Thomas's Hospital Med. School, LONDON S.E. I.England (no embryological work in progress) DAVIES, F. M.D., D.Sc, Prof. — Dept of Anat., Fac. of Med., Univ. of Sheffield. SHEFFIELD, England a. Histological studies of conducting system of the heart. (Mammalia) (in collaboration with E. T. B. FRANCIS. Dept of Zool.) DECK. J. D. B.S.. M.A.. Ph.D. — Dept of Anat.. School of Med.. Univ. of Virginia, CHARLOTTESVILLE, Va. U.S.A. a. Study of innervation of larval forelimbs which have regenerated after transplantation with reversed proximo-distal polarity. Ambystoma punc- tatum (Urodela) b. Study of relationship between innervation and regeneration of larval limbs with reversed proximo-distal polarity. Ambystoma punctatum (Urodela) c. Study of adult limb regeneration which occurred after implantation of tadpole tissues into the limb. Rana pipiens (Anura) DEKKER, Miss A. Physician — Anat.-Embryol. Lab. of the Univ., Fac. of Med., Wassenaarseweg, Boerhaavekwartier, LEIDEN, Holland a. Heart and vessels in congenital malformations. Homo sapiens (Prima- tes) (in collaboration with J. DANKMEIJER, H. A. SNELLEN and Miss H. C. van INGEN) DELGADO, R. Dr en Med. — Lab. d'Anat., Fac. de Med. de Paris, 45 Rue des Sts Peres, PARIS Vie, France a. Developpement du tube digestif. Homo sapiens (Primates) DELMAS, A. Prof. — Lab. d'Anat.. Fac. de Med. de Paris, 45 Rue de» Sts Peres, PARIS Vie, France a. Developpement de I'encephale. Homo sapiens (Primates) b. Developpement anormal de I'encephale et des organes des sens. Mus rattus (Rodentia) DEMPSEY, E. W. — Dept of Anat.. Harvard Univ., Med. School, 25 Shat- tuck St, BOSTON 15, Mass., U.S.A. DENIS. H. A. Lic.Sci.Zool. — Dept Morphol. des Chordes, Inst, de Zool. Ed. Van Beneden, Fac. des Sci., 22 Quai Ed. Van Beneden, LIeGE. Belgique a. Etude du caractere progressif de la determination de la plaque neurale. Pleurodeles Waltlii (Urodela) b. Recherche sur la genese des organes cerebraux, par la methode des greffes. Pleurodeles Waltlii, Ambystoma mexicanum (Urodela) 29 Den-Dra DENT. J. N. A.B., Ph.D.. Prof. — Dept of Biol., Univ. of Virginia, CHAR- LOTTESVILLE, Va, U.S.A. a. Uptake of certain radioisotopes by various embryonic regions. Hyla versicolor (Anura) b. Further studies on regeneration. Triturus viridescens (Urodela) c. Metamorphosis of a presumably neotenic cave salamander. Gyrinophilus palleucus (Urodela) DENUCfi. J. M. Dr Zool.Sci. — Lab. voor Zool.. Afd. Morphol., Universi- teitsstraat 14, GENT. Belgie. a. Physiology of development. (Insecta) DEROUX. G. Lie. es Sci. — Station Biologique, ROSCOFF, Finistere, France a. Influence de la penetration des fibres centripetes (au niveau des nerfs VII, lateral anter. et VIII) sur le plan d'organisation des parties cepha- lisees du tube nerveux, apres I'epibolie. Salmo irideus (Teleostei) h. Epoque de ponte et developpement larvaire. Cornularia cornucopia (Alcyonaria, Coelenterata) DETH, J. H. M. G. van M.D., Prof. — Anat.-Embryol. Lab. der Rijks Univ., Janskerkhof 3, UTRECHT, Holland a. Fetal endocrinology. (Aves. Mammalia) DETTLAFF, Mrs T. A. Dr Biol.Sci., M.I.I.E., Prof. — Inst, of Anim. Morphol. of the Acad, of Sci. of the U.S.S.R., Bolshaja Kalushkaja 33, MOSCOW V-71. U.S.S.R. a. Physiology of activation of the egg: the role of Ca-ions, the process of secretion. Huso huso, Acipenser giildenstadti, A. stellatus ( Acipenseri- formes. Chondrostei) b. The fate of the polysaccharides in the period of fertilization. (Acipen- seriformes, Chondrostei) i-DETWILER, S. R. Dr, Prof. — Dept of Anat., Coll. of Physicians and Surgeons, Columbia Univ., 630 West 168th St. NEW YORK 32. N.Y., U.S.A. (deceased) DEUCHAR, Miss E. M. M.A., Ph.D., M.I.I.E. — Dept of Embryol., Univ. Coll. London, Gower St, LONDON W.C. 1, England a. Effect of animo acid analogues on morphology and free amino acid con- tent of embryonic tissues. Xenopus laevis (Anura) b. Proteolytic activity in parts of early embryo. Xenopus laevis (Anura) DEVILLERS, Ch. M.I.I.E., Prof. — Lab. d'Anat. et d'Histol. comp., 1 Rue Victor Cousin, PARIS Ve, France a. Origine de I'energie utilisee au cours du developpement de I'oeuf. Salmo fario, S. irideus (Teleostei) h. Recherches sur la symetrisation de I'oeuf. Salmo spec. (Teleostei) DICK. D. A. T. M.B., Ch.B. — Dept of Human Anat., The Univ. Museum. OXFORD, England a. Physiology of foetal liver. Ovis communis (Ruminantia) DIJK, D. E. van B.Sc. — Zool. Inst., Univ. of Stellenbosch. STELLEN- a. Ontogenesis of the cloaca. (Anura) BOSCH, South Africa DIMITROWA. Miss A. I. Dr — Inst, of Gener. Biol., Med. School, Univ. of Sofia. Blwd. Lenin N. 2, SOFIA, Bulgaria DIMOND, Sister M. T. A.B., M.S., Ph.D. — Trinity Coll., WASHING- TON 17. D.C., U.S.A. 30 a. Histogenesis and interrelations of endocrines: the hypophysis under nor- mal conditions and after treatment with thiourea. Chelydra serpentina serpentina, and other spp. (Chelonia) DINGLER— HAHL, Mrs E. Ch. DrMed. — Anat. Inst, der Univ. Miin- chen, Pettenkoferstr. 11, MuNCHEN Id, Deutschland a. Das postnatale Wachstum der Lunge. Felis domestica (Carnivora) b. Bildet die Lunge nach der Geburt neue Parenchymeinheiten aus? Felis domestica (Carnivora) DODD. J. M. B.Sc, Ph.D. — Catty Marine Lab.. ST ANDREWS. Fife, Scotland DOHRN, P. M.D.. Ph.D. — Stazione Zool., NAPOLI. Italia DOKTER, H. J. Med.Drs — Anat.-Embryol. Lab., Free Calvinistic Univ., Pr. Hendriklaan 27, AMSTERDAM Z, Holland a. Study of abnormal development by injecting methyl-thiouracil into eggs. Gallus domesticus (Aves) b. Study of influence of anti-thyroid drugs on morphogenesis. Rattus nor- vegicus albinus (Rodentia) DOLLANDER, A. Dr — Lab. d'Histol., Dep. d'Embryol., Fac. de Med., 31 Rue Lionnois, NANCY (Meurthe 6 Moselle), France a. Etude des proprietes mecaniques du cortex de I'oeuf. (Amphibia) b. Etude des proprietes de permeabilite du cortex de I'oeuf. (Amphibia) c. Etude morphologique du cortex de I'oeuf au microscope optique et au microscope electronique. (Amphibia, Mammalia) d. Structure du spermatozoide au microscope optique et au microscope electronique. (Amphibia) CON NET) e. Action teratogene de I'uree. (Amphibia) (en collaboration avec R. MAR- DONALDSON, J. C. Ph.B., M.D.. Prof. — Dept of Anat., School of Med., Univ. of Pittsburgh. PITTSBURGH 13. Pa, U.S.A. DOORENMAALEN, W. J. van M.D. — Anat.-Embryol. Inst., Municipal Univ. of Amsterdam. Mauritskade 61. AMSTERDAM O, Holland a. The localisation of lensproteins in lens development. Gallus gallus (Aves) b. Source of lensproteins in lens regeneration. Gallus gallus (Aves) DOSSEL, W. E. A.B., M.S., Ph.D. — Dept of Anat.. School of Med., Univ. of North Carolina, CHAPEL HILL, N.C., U.S.A. a. Determination of the locus of origin of hypothalamic neurosecretory cells. Gallus domesticus (various varieties) (Aves) b. The effects of depletion and substitution of the perivesicular mesen- chyme upon the development of the thyroid. Gallus domesticus (various varieties) (Aves) c. Regulation of size and functional activity of heterotopic, homoioplastic transplants of the thyroid. Gallus domesticus (various varieties) (Aves) DRAGOMIROV. N. I. Dr Biol., F.I.I.E., Prof. — Inst, of Animal Mor- phol. of the Acad, of Sci. of the U.S.S.R.. B. Kalushskaja 33. MOS- COW V-71. U.S.S.R. a. The development of the sense organs of the lateral line system. Acipen- ser nudiventris Lov. (Chondrostei) DRAISMA, J. R. B.Sc. — Hubrecht Lab., Intern. Embryol. Inst., Tanskerk- hof 2, UTRECHT. Holland a. Influence of mesodermal components upon differentiation and organiza- tion of neural material. Ambystoma mexicanum, Triturus spp. (Urodela) 31 Dre-Eva DREYER. Miss M. V. M.Sc. — Dept of Zool.. Univ. of O.F.S., BLOEM- FONTEIN. South Africa a. The epitheho-neural bodies. Gallus domcsticus (Ai'es) DUFFEY, L. M. — Dept of Zool.. Indiana Univ., BLOOMINGTON, Ind.. U.S.A. DURANTE, Miss M. Dr — 1st. di Zool., Via Archirafi 18, PALERMO, a. Xenoplastic gill transplantations. (Amphibia) Italia b. Cholinesterase in embryonic development. (Ascidiaceae) DUSHANE, G. Ph. D., Prof. — Dept of Biol.. Stanford Univ.. PALO AL- TO. Cal.. U.S.A. DZIALLAS. P. R. Dr med. — Anat. Inst, der Univ. Miinchen, Pettenkofer- strasse 11. MONCHEN 15, Deutschland a. Ober das Verhalten der fetalen Diploevenen zu den Anlagen der Deck- knochen des Schadels. Canis familiaris, Felis domestica (Carnivora) b. Obcr Blutgefasse in Knochenkernen des fetalen Schadeldaches. Canis familiaris. Felis domestica (Carnivora) EAKIN R. M. A.B., Ph.D.. F.I. I.E., Prof. — Dept of Zool., Univ. of Cali- fornia, BERKELEY 4, Cal., U.S.A. EALES, Miss N. B. D.Sc. (London) — Univ. Dept of Zool.. READING, Berkshire. England EAYRS. J. T. B.Sc, Ph.D., D.Sc. — Dept of Anat.. The Med. School. Birmingham Univ.. Edgbaston. BIRMINGHAM 15. England a. Effects of hormones on central nervous development. (Rodentia) EBERT J. D. Ph.D., M.I.I.E. — Dept of Embryol.. Carnegie Inst, of Wash- ington. Wolfe and Madison Sts. BALTIMORE 5. Md. U.S.A. a. Biochemical and immunochemical analysis of the synthesis and distri- bution of the contractile proteins, actin, myosin (esp. H-meromyosin) and tropomyosin in the development of the heart in the early embryo. Gallus gallus (Aues) (in collaboration with R. F. RUTH) b. The metabolic characteristics of the heart-forming areas of the early embryo. Gallus gallus (AvesJ (in collaboration with R. F. RUTH) c. Immunological studies of melanogenesis; immunochemical properties of the melanins; melanoproteins. The chemistry of the pigment-forming area in the early embryo. Gallus gallus (Aves) d. Analysis of the effects of adult or late embryonic tissue transplants (chorioallantoic, intra-coelomic) on the differentiation and growth of the homologous tissues of the host embryo. Gallus gallus (Aves) 1. Selective transfer of radioactivity from grafts to homologous host tissues. 2. Fractionating and identification of organ-specific growth regulatory substances (inhibitory, stimulatory). 3. Growth regulation in normal and decapitated embryos. EDDS. Jr.. M. V. B.A., M.A.. Ph.D. — Arnold Biol. Lab., Brown Univ., PROVIDENCE 12. R.I.. U.S.A. EDE, D. A. B.Sc, M.S., Ph.D. — Dept of Zool.. Univ. of Edinburgh, West Mains Rd. EDINBURGH 9. Scotland a. Study of the developmental effects of embryonic lethal and female sterile mutations. Drosophila melanogaster (Diptera) h. Experimental study of normal embryology. Drosophila melanogaster (Diptera), Oncopeltus [asciatus (Heteroptera) , Detmestes maculatus (Coleoptera) 32 EDWARDS R. G. B.Sc. Ph.D. — Inst, of Animal Genet., Univ. Dept of Genet., King's Buildings, West Mains Rd, EDINBURGH 9, Scotland a. Heteroploidy and parthenogenesis. Mus musculus (Rodentia) b. Relations between sperms and eggs at fertilization. Mus musculus. Rat- tus natalensis, R. norvegicus (Rodentia) c. Investigation of gametogenesis and of early embryonic development using radioactive tracers. Mus musculus (Rodentia) (in collaboration with J. L. SIRLIN) EEDEN } A. van M.Sc, D.Sc. — Dept van Dierkunde, Potchefstroom Univ., POTCHEFSTROOM. Suid-Afrika (no embryological work in progress) EGUCHI, G. B.Sc. — Biol. Inst., Fac. of Sci., Nagoya Univ., Chigusa-Ku, NAGOYA, Japan a. The lens regeneration in the cyclopean monster. Triturus pyrrhogaster (Utodela) ELBERS, P. F. M.Sc. — Centrum voor Electronenmicroscopie, Janskerk- hof 3, UTRECHT. Holland a. Electron microscopical investigation on growth and differentiation of the egg. Limnaea stagnalis (Gastropoda) b. Electron microscopical investigation on the influence of Li ions on the egg. Limnaea stagnalis (Gastropoda) c. Electron microscopical investigation on the influence of Li ions on the egg. Paracentrotus lividus (Echinodermata) ELLIS. R. — Dept of Anat., Harvard Univ.. Med. School. 25 Shattuck St. BOSTON 15, Mass.. U.S.A. ELSDALE, T. R. B.Sc. — Dept of Zool. and Comp. Anat.. The Univ. Museum, OXFORD, England a. Nuclear transplantation. Xenopus laevis, Discoglossus pictus etc. (Anu- ra) (in collaboration with M. FISCHBERG) EMANUELSSON. H. Fil.lic. — Zoophysiol. Inst.. Univ. of Lund. LUND, Sweden ENDO, Y. M.Sc. — Biol. Lab., Keio Univ., YOKOHAMA, Hiyoshi. Japaa a. Electron microscopical study of fertilization. (Echinoidea) b. A study of the fertilization membrane. (Echinoidea) ENEMAR, E. A. W. Fil.lic. — Embryol. Dept, Zool. Inst, of the Univ. of Lund, LUND, Sweden a. The development of the pituitary (Rodentia) ENGELBRECHT, D. van Z. M.Sc. — Zool. Inst.. Univ. of Stellenbosch. STELLENBOSCH, South Africa ENGELMANN, F. Dr Phil. — Zool. Inst, der Univ. Bern. Sahhstr. 8. BERN. Schweiz a. Untersuchungen der hormonalen Steuerung'der Hautungen. Leucophaea Maderae (Orthoptera) ENGLANDER. H. Dr Med.. Dr rer.nat. — Zool. Inst, der Univ. Koln. Kerpenerstr. 13, KoLN-LINDENTHAL, Deutschland a. Regionalspezifische Induktion. (Urodela) ERENQIN. Z. Med.Veter.Dr. Prof. — Inst, of Histol. and Embryol., Veter. Coll. of the Univ., ANKARA, Turkey (no embryological work in progress) EVANS, D. R. B.S., M.S. — Dept of Biol.. The Johns Hopkins Univ., Charles and 34th Sts, BALTIMORE 18. Md. U.S.A. 33 Eva-Fin EVANS H. J. Ph.D. - Dept of Zool.. Syracuse Univ.. SYRACUSE 10. N.Y.. U.S.A. a. Action of cortisone on the developing embryo. Callus dome^ticus. Rattus rattiis (Amniota) EVOLA— MALTESE. Mrs C. Dr — 1st. di Zool.. Via Archirafi 18. PALERMO. Italia a. Inhibition of alkaline phosphatase in embryonic development. (Ascidia- ceae) EYAL— GILADI. Mrs H. M.Sc.Ph.D. — Dept of Zool.. Hebrew Univ.. JERUSALEM. Israel a. Problems concerning induction of mesoderm. (Amphibia) h. An attempt to measure the curves of activation and transformation in the process of neural induction. (Amphibia) c. Problems concerning the induction of the oral hypophysis. Pleurodeles spec. (Urodela) EYMANN. H. — Zool. Inst, der Univ. Bern. Sahlistr. 8. BERN, Schweiz EYRIES. Ch. Dr en Med. — Lab. d'Anat.. Fac. de Med. dc Paris, 45 Rue des Sts Peres. PARIS Vie, France a. Oreille interne et complexe acoustico-facial. Homo sapiens (Primates) FAASSEN, F. Van Dr — Anat.-Embryol. Lab.. Free Calvinistic Univ.. Pr. Hendriklaan 27. AMSTERDAM Z, Holland a. The influence of hypoxaemia during gravidity on the development of the cerebellum of the foetus. Rattus norveqicus (Rodentia) (in collaboration with F. ST AM and F. C. SCHOLTEN) FABER. I. M.Sc. — Hubrecht Lab., Intern. Embryol. Inst.. Janskerkhof 2, UTRECHT. Holland a. The self-differentiation of the blastema and the influence of the stump in limb regeneration. Ambystoma mexicanum (Urodela) FANKHAUSER. G. Ph.D.. F.I. I.E.. Prof. — Dept of Biol.. Princeton Univ.. PRINCETON. N.J., U.S.A. a. The offspring of polyploids; their chromosome number, mortality, patho- logy etc. Ambystoma mexicanum (Urodela) (in collaboration with R. R. HUMPHREY) b. Development of diploid and heteroploid embryos implanted under the skin of adults. Triturus spec. (Urodela) c. Measurements of response to tactile stimulation and of swimming capa- city in diploid and triploid larvae. Triturus spec. (Urodela) FARINELLA— FERRUZZA. Mrs N. Dr — 1st. di Zool.. Via Archirafi 18. PALERMO. Italia a. Xenoplastic tailbud transplantations. (Amphibia) b. Combinations and transplantation of blastomeres. (Ascidiaceae) FAURfi-FREMIET. E. Dr, F.I. I.E., Prof.hon. — Lab. d'Embryol. exper.. Coll. de France, Place Marcelin Berthelot, PARIS Ve, France a. Morphologie comparee et morphogenese. (Ciliata) (en collaboration avec Miss M. HAMARD) FAUTREZ. J. C. M.D.. Member of the Royal Flemish Acad, of Sci.. M.I. I.E.. Prof. — Lab. of Anat., Fac. of Med., Univ. of Gent, Byloke- kaai 1. GENT. Belgium FAUTREZ— FIRLEFYN. Mrs N. J. — Lab. of Anat.. Fac. of Med.. Univ. of Gent. Bylokekaai 1. GENT. Belgium TOON, Canada FEDOROFF, S. M.A. — Dept of Anat., Univ. of Saskatchewan, SASKA- 34 a. Chemical changes in embryonic and adult tissues due to chilHng. b. Serum toxicity tested on cell cultures. FELDMAN. M. M.Sc. Ph.D. — Dept of Exper. Biol., Weizman Inst, ol Sci., REHOVOTH. Israel a. The distribution and synthesis of organ-specific proteins: antigens and enzymes. Gallus spec. (Aves), Mus spec. (Rodentia) (in collaboration with D. YAFFE) FELL. Miss H. B. Dr. F.I.I.E. — Strangeways Research Lab.. Wort's Causeway, CAMBRIDGE. England FELTS. W. J. L. A.B., A.M.. Ph.D. — Dept of Anat.. School of Med., Univ. of Minnesota. MINNEAPOLIS 14. Minn.. U.S.A. a. Skeletal growth and development. b. Effects of mechanical factors on bone and cartilage growth. c. Infectious disease and skeletal tissue growth. (Rodentia) d. Immune reaction to hard connective tissue transplants. (Rodentia) e. Blood supply to grafts. (Rodentia) FENART, R. — Lab. d'Anat., Fac. de Med. de Paris, 45 Rue des Sts Peres, PARIS Vie, France a. Developpement du plexus brachial. Homo sapiens (Primates) (en col- laboration avec G. H. G. OLIVIER) FEO, V. J. De B.S., M.S., Ph.D. — Dept of Embryol., Carnegie Inst, of Washington, Wolfe and Madison Sts, BALTIMORE 5, Md. U.S.A. a. Pseudopreqnancy and the nature of uterine sensitivity. Rattus rattus (Rodentia) b. Influence of steroids on deciduoma formation. Rattus rattus (Rodentia) c. Mechanism of deciduoma formation. Rattus rattus (Rodentia) FERBER-SCHMIDT, L. von — Anat. Inst, der Univ., Burgstrasse 51, G5T- TINGEN, Deutschland. a. Differenzierungsbewegungen der Lymphknoten. Homo sapiens (Prima- tes) (gemeinsam mit E. BLECHSCHMIDT) FEREMUTSCH, K. Dr Med. — Hirnanat. Inst, der Psychiatr. Univ. Klinik. Med. Fak., Waldau, BERN, Schweiz FICQ, Mrs A. A. Dr en Sci. Biol. — Lab. de Morphol. anim., Univ. libre de Bruxelles, 1850 Chaussee de Wavre, BRUXELLES-Auderghem, Bel- gique a. Application d'une methode autoradiographique par irradiation neutro- nique, au dosage et a la localisation du Lithium dans des embryons. Am- by stoma spec, Pleurodeles spec. (Urodela) b. Application d'une methode autoradiographique a I'etude du phenomcnc d'induction. Amby stoma spec, Pleurodeles spec, Rana spec. (Amphibia) c Etude autoradiographique du metabolisme au cours de I'oogenese. Aste- rias spec. (Asteroidea, Echinodermata), Rana spec. (Anura) d. Observations autoradiographiques sur I'oogenese et la morphogenese. Pleurodeles spec, Triturus spec (Urodela), Rana fusca (Anura) FILOGAMO, G. Dr — Inst, of human Anat., Corso Massimo d'Azeglio 52, TORINO, Italy a. Histo- and organotypical growth of the embryonic liver in vitro. Gallus domesticus (Aves) FINAMORE, F. J. B.A., M.S., Ph.D. — Southern Illinois Univ., CAR- BONDALE, 111., U.S.A. a. Nucleic acid metabolism in embryos. Rana pipiens (Anura) 35 Finamorc-Fra b. Acid-soluble nucleotides in embryos (P-'- study). Rana pipiens (Anura) c. Phosphate transfer in hybrids. Rana pipiens (Anura) FINGER. I. B.A.. Ph.D. — Dept of Biol.. Haverford Coll., HAVERFORD. Pa. U.S.A. a. Immunogenetic studies in relation to cell differentiation. Paramecium aurelia (Ciliata) FISCHBERG. M. Dr Phil. (Zurich). M.A. (Oxford). M.I.I.E. — Dept of Zool. and Comp. Anat.. The Univ. Museum, OXFORD, England a. Nuclear transplantation. Xenopus laevis, Discoglossus pictus etc. (Anu- ra) (in collaboration with T. R. ELSDALE) FISCHIAROLO. G. Dr — 1st. di Zool.. Via Archirafi 18. PALERMO. Italia a. The determination of the entoderm. (Amphibia) h. Mitochondria and respiratory enzymes in development. (Ascidiaceae) FISHER, F. J. F. M.Sc, Ph.D. — School of Bot.. Univ. of Melbourne, CARLTON N3, Victoria. Australia FISK. A. M.Sc. — Dept of Biol.. St Mary's Hosp. Med. School, Norfolk Place. Paddington. LONDON W. 2, England FITZGERALD, L. R. Ph.D. — Div. of Anat., Med. Units Div.. Fac. of Biol. Sci., Univ. of Tennessee, MEMPHIS 3. Tenn.. U.S.A. a. Effects of temperature on neonates and development of thermoregulatory mechanismus. Mus musculus (Rodentia) h. Metabolic characteristics of the neonatal period. Mus musculus (Roden- c. Oxygen consumption of embryos. Mus musculus (Rodentia) tia) FLEISCHHAUER. K. Dr med. — Anat. Inst, der Univ. Kiel, Neue Univ.. Haus 30, KIEL, Deutschland a. Postnatal development of the Ammons Formation. (Mammalia) FLEXNER, L. B. B.S., M.D., M.I.I.E.. Prof. — Dept of Anat.. School of Med.. Univ. of Pennsylvania. PHILADELPHIA 4. Pa. U.S.A. FLYNN, T. THOMSON M.B.E., D.Sc. F.I.I.E.. ProL — University Col- lege. Gower Street. LONDON W.C. 1, England a. Development of the neural crest. (Mammalia) FOLEY. Mrs E. P. M.B., B.Ch.. B.A.O. — Dept of Anat.. Univ. of Liver- pool. LIVERPOOL. England a. Studies on the development of the jejunum and ileum in relation to their vascular supply. (Mammalia) FOLLENIUS, E. Lic.es Sci. — Lab. de Zool. et d'Erabryol. exper.. Inst, de Zool. et de Biol, gener.. 12 Rue de I'Universite. STRASBOURG, France a. Origine de la lignee germinale, morphogenese et differenciation des gonades. Xiphophorus Helleri, Lebistes reticulatus. Barbus spec. (Teleos- tei) (en collaboration avec J. H. VIVIEN) FONSECA SACARRAO. G. da Dr Sc. — Museu e Lab. Zool. d. Fac. d. Ci., Univ. d. Lisboa. LISBOA. Portugal a. Development of the "resisting apparatus " of the mantle-funnel, and of the epistellar body. (Cephalopoda) FOOTE, Ch. L. B.S.. M.S.. Ph.D.. M.I.I.E. — Zool. Deot. Southern Illinois Univ.. CARBONDALE. 111., U.S.A. a. Studies on sex differentiation. Rana clamitans. R. catesbiana (Anura) (in collaboration with Mrs F. M. FOOTE) b. I n V i t r o cultivation of gonads. Rana clamitans. R. catesbiana (Anura) (in collaboration with Mrs F. M. FOOTE) 36 FOOTE, Mrs F. M. A.B., A.M., Ph.D. — Zool. Dept, Southern IHinois Univ.. CARBONDALE. Ill, U.S.A. a. Studies on sex differentiation. Rana clamitans, R. catesbiana (Anura) (in collaboration with Ch. L. FOOTE) b. I n V i t r o cultivation of gonads. Rana clamitans, R. catesbeiana (Amiva) (in collaboration with Ch. L. FOOTE) FORD. E. H. R. M.A., M.D. — Anat. School, Univ. of Cambridge, CAM- BRIDGE, England a. Growth of the foetal skull. Homo sapiens (Primates) b. Influence of thyroid on skull growth (post-natal). Rattiis rattus (Rodentia) FORD, P. B.Sc, Ph.D., Prof. — Dept of Zool., Univ. of British Columbia, VANCOUVER, B.C., Canada a. The morphogenesis and structure of the gastric gland. Castor canadensis (Kuhl) (Rodentia) FORSBERG, J. G. — Dept of Anat., University, LUND, Sweden a. Hormonal influence on development of genital organs. Rattus spec. (Rodentia) (in collaboration with S. BENGMARK) FOWLER, I. B.S., M.S., Ph.D. — Dept of Anat., SchooP of Med.. Univ. of North Carolina, CHAPEL HILL. N.C., U.S.A. a. The intrinsic control of canalization in the development of the tailbud neural tube. Gallus domesticus (White Rock) (Aves) h. In vitro studies of the differentiation of somites. Gallus domesticus c. Effects of carcinogens upon cellular differentiation. Gallus domesticus FOX, H. B.Sc. Ph.D. — Dept of Zool. and Comp. Anat.. Univ. Coll. London, Gower St, LONDON W.C. 1. England a. Effect of different osmotic solutions on the development of the prone- phros. Triton helveticus (Urodela) b. Effect of decapsulation on the development of the pronephros. Triton helveticus (Urodela) c. The musculature in the larval head. (Urodela) d. Development of the head of the larva. Hynobius nebulosus (Urodela) e. Morphology and homologies of the pronephros. (Urodela) FRANCIS. E. T. B. B.Sc. Ph.D.. Dr — Dept of Zool.. Univ. of Sheffield, SHEFFIELD. England a. The development and histogenesis of the conducting system of the heart. (Mammalia) (in collaboration with F. DAVIES, Dept of Anat.) FRANgOIS, Y. Dr es Sci. — Lab. d'Anat. comp., Fac des Sci.. 1 Rue Victor Cousin. PARIS Ve, France a. Anatomy and morphogenesis of the fins and vertebrae. Salmo and other spp. (Teleostei) FRANZeN. a. S. Fil.Dr — Zool. Inst.. Uppsala Univ., UPPSALA. Sweden a. Comparative study of the spermatozoon and spermatogenesis. (Everte~ brata) ERASER, A. S. Ph.D. — C.S.I. R.O. Anim. Gen. Sect., c/o Dept of Zool., Univ. of Sydney, SYDNEY, N.S.W., Australia ERASER, F. C. Ph.D., M.D. — Dept of Genetics. McGill Univ., MON- TREAL, Quebec, Canada a. The experimental production of congenital defects, chiefly by maternal treatment with cortisone. Mus musculus (Rodentia) 37 Frascr-Gci b. Mechanism of embryonic palate closure, and factors that interfere with it. Mas miiscitlus (Rodentia) FRASER R. C. B.S.. M.S.. Ph.D. — Dept of Zool. and Entomol., Univ. of Tennessee. KNOXVILLE. Tenn., U.S.A. a. Physiological studies of early embryogeny. Gallus domesticus (Aves) h. The role of the iodine carrier in metamorphosis. Rana pipiens (Anura) c. Blood supply in limb regeneration. Rana pipiens (Anura) d. Tumor growth in embryonate systems. Gallus domesticus (Aoes) FRAZER, J. F. D. M.A.. D.M.. Ph.D. — Dept of Physiol., Charing Cross Hospital Med. School, Chandos Place. LONDON W.C. 2, England a. Morphology and activation of spermatozoa. (Amphibia) h. Endocrinology of reproduction. Gastrotheca marsupiatum (Anura) FRIANT, Mrs M. Dr es Sci., Dr en Med.. Prof. — Lab. dc Zool.. Museum Nat. d'Hist. Nat.. 55 Rue de Buffon. PARIS Ve. France a. Development of the skeleton. (Reptilia. Aves, Mammalia) b. Development of the teeth. (Mammalia) c. Development of the brain. (Mammalia) d. Development of pterylosis. (Aves) e. Development of cartilage, bone and horn. (Vertebrata) FRICK. H. Dr Med. — Dr Senckenberg. Anat. Inst.. Med. Fak. der Univ.. Ludwig Rehnstr. H, FRANKFURT/Main-Sud. Deutschland FROHLICH, A. — Inst, of Animal Genet., Univ. Dept of Genet.. King's Buildings, West Mains Rd, EDINBURGH 9, Scotland a. Differentiation in tissue culture. Gallus spec. (Aves) (in collaboration with Mrs R. M. CLAYTON— FREEDM AN) b. Immunological study of nucleoproteins. Gallus spec. (Aves) (in colla- boration with F. BILLETT and Mrs R. M. CLAYTON— FREED- MAN) FROST. D. M.S. — Coll. of Pharmacy. Rutgers Univ.. NEWARK, N.J.. U.S.A. descens (Urodela) a. Causal analysis of factors governing lens regeneration. Triturus viri- FUJII. S. D.Sc. Prof. — Biol. Inst.. Kobe Univ.. KOBE. Japan a. Developmental and genetical studies on the imaginal discs (..Bar". ..Lobe", and eyeless mutants). Drosophila melanogaster (Diptera) FUJII, T. Dr Sci.. Prof. — Zool. Inst.. Fac. of Sci.. Tokyo Univ.. TOKYO. Japan a. The nucleolus and its possible role in mitosis, as seen in living cells. (Echinodermata; Mammalia) h. Chemical nature of the organizer. (Amphibia) FUKUDA. S. D.Sc. — Katakura Sericult. Exper. Stat., MATSUMOTO CITY, Japan GABIE— GUBBAY, Mrs V. B.Sc. Ph.D. — Dept of Zool.. Univ. of the Witwatersrand. Milner Park. JOHANNESBURG, South Africa a. The eye cup-lens correlation. Rana angolensis (Anura) GAILLARD. P. J. Med.Dr, Prof. — Lab. for Cytol. and e.xper. Histol.. Fac. of Med.. Univ. of Leyde, Rijnsburgerweg 10, Boerhaavekwarticr, LEI- DEN. Holland a. Developmental potencies of the fetal germinal epithelium in explants. Homo sapiens (Primates) (Aves) b. Functional activity of the parathyroid gland in the embryo. Gallus gallus with Mrs R. M. CLAYTON-FREEDMAN) 38 GALLERA, J. Ph.D.. M.I.I.E. — Inst. d'Anat., Fac. de Med.. Univ. de Geneve, 20 Rue Ecole de Med., GENfiVE, Suisse a. Etude descriptive du developpement de I'innervation du coeur. Gallus spec. (Aves) (en collaboration avec J. A. BAUMANN) b. Etude experimentale sur le developpement histogenetique du systeme nerveux. (Amphibia) c. Etude experimentale sur I'induction du systeme nerveux par la methode de greffes et d'explantation. (Amphibia) GALLIEN, L. Dr es Sci., F.I. I.E., Prof. — Lab. d'EmbryoL, Fac. des Sci.. Univ. de Paris. 12 Rue Cuvier, PARIS Ve. France GANGULY. B. M.Sc. — Dept of Zool.. Presidency Coll., College St. CAL- CUTTA 12. India a. Cytochemistry. (Porifera) b. Physiology of cell-contact. (Porifera) (in collaboration with S. MOO- KERJEE) GANGULY. D. N. Prof. — Dept of Zool.. Calcutta Univ.. 35 Ballygunj Circular Road, CALCUTTA 19. India GARDNER, E. — Dept of Anat., Coll. of Med., Wayne State Univ., DETROIT 7, Mich.. U.S.A. a. Development of skeleton and joints of foot in embryo and fetus. Homo sapiens (Primates) (in collaboration with D. J. GRAY and R. O'RA- HILLY) U.S.A. GATES. A. H. B.S. — R. B. Jackson Memorial Lab., BAR HARBOR. Mc. a. Influence of ovogenesis and atresia upon response of prepuberal animals to exogenous gonadotropins. Mus musculus (Rodentia) b. Influence of maternal uterine environment upon development of non- genic characters as studied by egg transfer. Mus musculus (Rodentia) GAYET. J. F. Dr es Sci.. Prof. — Lab. de Physiol. Gener., 30, Rue Sainte- Catherine, NANCY, France a. Recherches experimentales sur le developpement biochimique et fonction- nel des lobes optiques. Gallus domesticus (Aves) b. Recherches experimentales sur la chronologie du developpement biochi- mique au niveau de I'encephale. Gallus domesticus (Aves) (en collabo- ration avec J. SCH WANDER) c. Recherches experimentales sur le developpement cytochimique des lobes optiques. Gallus domesticus (Aves) (en collaboration avec Miss A. BONICHON) GEIGER, W. DrPhil. — Zool. Inst, der Univ. Bern. Sahlistr. 8, BERN. Schweiz GEIGY-HEESE, R. Dr. Prof. — Schweiz. Tropeninst., Socinstr. 57 — Zool. Anstalt der Univ., Rheinsprung 9. BASEL, Schweiz a. Endocrinologie der Metamorphose (Xenoplastische Transplantation in- duktiver Organe). (Insecta) b. Spermatogenese, Ovogenese und Embryonalentwicklung. (Argasidae, Acarina, Arachnoidea) c. Uebertragung von Spirochaetosen iiber das miitterhche Ovarium auf die Embryonen und damit auf die Nachkommen der nachsten Generation. (Ixodidae, Acarina. Arachnoidea) d. GewebezUchtung. (Arthropoda) GEILENKIRCHEN. W. L. M. M.Sc. — Zool. Lab. der Rijks Univ.. Jans- kerkhof 3. UTRECHT, Holland 39 Gcilcnkirchcn-Gon a. Metabolism and respiration of egg and embryo. Limnaca stagnaV.s (Gas- tropoda) h. Influence of various kations on development. Limnaea stagnalis (Gastro- poda) (in collaboration with Chr. P. RAVEN) c. Mitotic rhythm in reduced weight (weight below water) during cleavage. Psammcchinus microtuberculatus (Echinoidea) (in collaboration with E. ZEUTHEN. Copenhagen) GENNARO Jr J F. Ph.D. — Dept of Anat., Coll. of Med., State Univ. of New York, 350 Henry St, BROOKLYN 1, N.Y., U.S.A. G£RARD. P. M.D., F.I. I.E., Prof. honor. — Fac. de Med. de I'Univ.. 97 Rue aux Laines. BRUXELLES, Beigique GEYER— DUSZYnSKA, Mrs I. Mgr.phil. — Dept of Cytol., Warszawa Univ., Krakowskie Przedmiescie 26/28. WARSZAWA, Poland a. Experimental studies on the influence of protoplasmic factors on the elimination process of somatic chromosomes in embryos. (Cecidomyidae, Diptera) b. Experimental studies on germ line chromosomes. The fate of germ cells with somatic chromosome number. (Cecidomyidae, Diptera) GHIRARDELLI, E. Prof. — 1st. di Zool.. Via S. Giacomo-9. BOLOGNA. Itaha a. L'action de quelques sels sur le developpement de I'oeuf. Spadella spec. (Chaetognatha) b. La formation des cellules germinales. Spadella spec. (Chaetognatha) c. Regeneration. Spadella spec. (Chaetognatha) GIDHOLM, L. Fil.kand. — Zool. Inst., Uppsala Univ.. UPPSALA, Sweden a. Larval development. (Syllidae) GILBERT, Miss C. M.Sc, D.Sc. (Rand) — Anat. Dept, Med. School, Univ. of Witwatersrand, Hospital Hill, JOHANNESBURG, S. Africa GILBERT. P. W. A.B., Ph.D.. Prof. — Dept of Zool.. Cornell Univ., ITHACA. N.Y., U.S.A. a. Studies on reproductive habits and structures, especially the clasper mechanism and the function of the siphon sacs. ( Elasmobranchii) b. Gestation and parturition in representative species. Urolophus jamaicien- sis, Dasyatis americana (Elasmobranchii) GILLMAN, J. D.Sc, M.B., Ch.B. (Rand), Prof. — Physiol. Dept, Med. School, Univ. of Witwatersrand. Hospital Hill. JOHANNESBURG, South Africa (no embryological work in progress) GINSBURG, Mrs A. S. Cand.Biol.Sci. — Inst, of Animal Morphol. of the Acad, of Sci. of the U.S.S.R.. Bolshaja Kalushskaja 33, MOSCOW V-71. U.S.S.R. a. Cytology of fertilization; experimental polyspermy. Huso huso, Acipen- ser giildenstadti, A.stellatus (Acipenseriformes, Chondrostei) GIROUD, A. F.I. I.E., Prof. — Lab. d'Embryol., Fac. de Med., 45 Rue des Sts Peres, PARIS Vie, France a. Recherches sur I'influence teratogene des avitaminoses maternelles. Mus rattus (Rodentia) b. Recherches sur I'influence teratogene des intoxications maternelles. Mus rattus (Rodentia) c. Etude des cas teratologiques individuels. Homo sapiens (Primates) 40 d. Developpement anormal de I'encephale. Mus rattus (Rodentia) GITLIN, G. B.Sc, Ph.D., M.B.. Ch.B. — Dept of Anat., Hadassah Med. School Hebrew Univ., JERUSALEM, Israel a. Origin of epithelium of cervical canals of uterus. Mus norvegicus albinus (Rodentia) h. Forelimb regeneration in the adult. Xenopus laevis (Anura) c. Site of blastocyst implantation. Mus norvegicus albinus (Rodentia) GLADE, R. W. B.A., M.S., Ph.D. — Biol. Dept, American Univ., BEI- RUT, Lebanon dela) a. Effect of tail skin on forelimb regeneration. Triturus viridescens (Uro- GLENISTER, T. W. M.B., B.S., Ph.D. — Anat. Dept. Charinq Cross Hosp. Med. School. 62 Chandos Place, LONDON W.C. 2, JEngland a. Reaction of genital tract tissues to hormones in vitro. (Mammalia) b. Implantation. (Mammalia) c. The early embryology. Macrorhinus spec. (Pinnipedia) d. Activation of spermatozoa with gonadotrophins. (Amphibia, Mammalia) GLIMSTEDT, G. Med.Dr, Prof. — Tornblad-Inst. for comp. EmbryoL, Biskopsgatan 7, LUND, Sweden (no embryological work in progress) GLOOR, H. J. Ph.D.. Prof. — Genet. Inst, der Rijks Univ., 5e Binnenvest- gracht 8, LEIDEN, Holland a. Differentiation in imaginal discs. Drosophila melanogaster (Diptera) GOBETTO, A. Dott. — 1st. di Anat. veter.. Via Nizza 52. TORINO, Italia (no embryological work in progress) GODINA. G. Prof. — 1st. di Anat. veter.. Via Nizza 52, TORINO. Italia a. Researches on the differentiation and growth in vitro of the neurons of the embryonic nervous centres. Gallus domesticus (Aves) h. Various growth modalities of the neurites in in vitro explants ot nervous tissue. Gallus domesticus (Aves) GOEDBLOED. J. F. Med.Drs — Anat.-Embryol. Lab. of the Univ. of Leyden. Wassenaarseweg, Boerhaavekwartier, LEIDEN, Holland a. Development of the ear and the tympanic cavity. Homo sapiens (Pri- mates) GOLDIE, M. — Dept of Zool., Univ. of Connecticut, STORRS, Conn., U.S.A. a. Ontogenesis of enzymes. Gallus domesticus (Aves) (in collaboration with H. CLARK) GOLDMAN. A. S. A.B.. Sc.M. — Upstate Med. Center, State Univ. of New York, SYRACUSE 10, N.Y., U.S.A. GOLDSMITH, E. D. Dr, Prof. — Dept of Histol., Coll. of Dentistry, New York Univ., 477 First Ave, NEW YORK 16, N.Y., U.S.A. GOMES FERREIRA, J. V. Dr — Inst, de Histol. e Embriol., Fac. de Med., Avenida 28 de Maio, LISBOA, Portugal a. Recherches sur la migration des gonocytes. Cavia Cobaya (Rodentia) GOMOT, L. Lic.es Sci. — Lab. de Zool., 1 Avenue Vercingetorix, CLER- MONT-FERRAND. France a. Etude du developpement embryonnaire de la glande uropygienne. (Aves) GONTCHAROFF. Miss M. Dr es Sci. — Lab. d'Evolution des Etres orga- nises, Fac, des Sci. de Paris, 105 Boulevard Raspail, PARIS Vie, France 41 Gon-Gro GONZALEZ F. B.S., M.S.. Ph.D. — Univ. of Texas Dental Branch, P.O. Bo.x 20068. HOUSTON 25. Texas, U.S.A. a. Study of factors involved in survival of frozen embryonic tissues. Cal- lus domesticus (Aves) b. Resumption of development after freezing of organ rudiments. Gallus domesticus (Aves) c. Conversion of folic to folinic acid during development. Callus domesticus (Ares) ^ , GONZALEZ GUZMAN. L Dr. — Instituto de Estudios Medicos y Biolo- gicos. Univ. Nac. Auton. de Mexico, Apartadao Postal 8109, MEXICO, D.F., Mexico GONZALEZ-RAMIREZ, J. M.D. — Inst, de Estudios Med. y Biol., Univ. Nac. Auton., Apartado Postal 8109, MfiXICO D.F., Mexico a. Tumor localizing labelled antibodies. GOODHART, C. B. M.A., Ph.D. — Univ. Museum of Zool., Univ. of Cambridge. Downing St, CAMBRIDGE, England (no embryological work in progress) GORINI, Miss I. Dr Biol. Sci. — 1st. di Zool. e Anat. comp., Univ. di Milano, Via Celoria 10, MILANO, Italia GOSS R. J. A.B., A.M.. Ph.D. — Arnold Biol. Lab., Brown Univ., PRO- VIDENCE 12. R.I., U.S.A. a. Fin and taste barbel regeneration. Ameiurus spec. (Pisces) b. Regeneration of lower jaws. Triturus spec. (Utodela) c. Morphogenesis and regulation in limb regenerates. Triturus spec. (Uro- dela) GOSZWALD, K. Dr Phil.. Dr habil.rer. nat.. Prof. — Inst, fiir Angewandte Zool. der Univ.. Naturw. Fak., Rontgenring 10. WURZBURG, Deutschland GOTHIE. Miss M. M. C. S. M.D.. Dr es Sci. — Lab. d'Hormonol. et Cytol. Exper., Ecole pratique des Hautes Etudes, Hopital Broca, 111 Rue L. M. Nordmann, PARIS XIII, France a. Etude de la fecondation, de la migration de I'oeuf dans la trompe de Fallope. a I'aide du 35S utilise sous forme de »5S04Na9 ou de cystine. Orijctolagus cuniculus (Lagomorpha) (en collaboration avec R. MORI- CARD) b. Etude des secretions cervicales. uterines et tubaires, en rapport avec les phenomenes de I'ascension spermatique. de la fecondation, de la segmen- tation, et de la nidation. Oryctolagus cuniculus (Lagomorpha) (en colla- boration avec R. MORICARD et J. BELAISCH) c. Decoloration du dichlorophenol indophenol (DPIP) par I'ovocyte. Etude par micro-injection quantitative. Mus musculus (Rodentia) (en collabo- ration avec R. MORICARD et O. BAIOCCHI) GOTO, T. M.A. — Biol. Lab., Keio Univ.. YOKOHAMA, Hiyoshi, Japan a. Studies on the purification of fluorescent substances and their biological meanings. (Amphibia) h. Studies on the influence of the pterin substances upon development. Bombyx mori (Lepidoptera), Rana nigromaculata (Anura) GOULD, R. P. B.Sc. M.Sc. — Anat. Dept, Middlesex Hosp., Med. School, LONDON W. 1, England GRABOWSKI, C. T. B.S.. Ph.D. — Dept of Anat., School of Med.. Univ. of Pittsburgh. PITTSBURGH 13. Pa. U.S.A. 42 a. Experimental analysis of induction and early development of the central (Aves) b. Role of Hensen's node in early development. Gallus domesticus (Aves) c. Development of the notochord forming system. Gallus domesticus (Aves) d. Teratological effects of hypoxia. Gallus domesticus (Aves) GRANT, Ph. Dr — Inst, for Cancer Research. 7701 Burholme Ave, PHILA- DELPHIA II, Pa., U.S.A. GRAUMANN, W. Dr Med., Prof. — Anat. Inst, der Univ., Burgstrasse 51. GOTTINGEN, Deutschland a. Histochemie von Entwicklungsprozessen, spec. Kohlenhydrate (zur Zeit: Eientwicklung, Implantation). Mesocricetus auratus (Rodentia) GRAY, D. J. — Dept of Anat., Coll. of Med., Wayne State Univ., DETROIT 7, Mich., U.S.A. a. Development of skeleton and joints of foot in embryo and fetus. Homo sapiens (Primates) (in collaboration with E. GARDNER and R. O'RAHILLY) GRAY, J. Prof. — Univ. Museum of Zool., Univ. of Cambridge, Downing St, CAMBRIDGE, England a. Sperm and fertilization (in collaboration with Lord ROTHSCHILD). GRECA. M. LA Dr Nat.Sci. — 1st. di Zool. dell'Universita di Napoli, Via Mezzocannone 8, NAPOLI, Italia a. Istologia e citologia delle gonadi, con particolare riferimento alia vitello- genesi. (Orthoptera) b. Rigenerazione, con particolare riferimento ai blastemi regenerativi. (Polychaeta) GREEN, Mrs E. UFFORD A.B., M.A.. Ph.D. — Dept of Biol., Haverford Coll.. HAVERFORD, Pa, U.S.A. a. Morphological, cytological and cytochemical studies of the effects of carcinogens on early development and larval growth. Rana spec. (Anura) GREGG, J. H. B.S., M.S., Ph.D. — Dept of Biology, Univ. of Florida, GAINESVILLE, Florida, U.S.A. a. Serological investigations of cell adhesion. Dictyostelium discoideum (Acrasiales) GREGG, J. R. B.S., Ph.D. — Dept of Zool., Columbia Univ., Broadway and 116th St. NEW YORK 27, N.Y., U.S.A. a. Metabolism of normal animals and hybrids. Rana pipiens, R. pipiens x R. sylvatica (Anura) b. Metabolism of normal and hybrid tissue-breis. Rana pipiens, R. pipiens ? X R. sylvatica $ (Anura) GREULICH, R. C. B.A., Ph.D. — Dept of Anat., School of Med., Univ. of Cahf., LOS ANGELES, Cal., U.S.A. a. Radioautographic studies of chorio-allantoic placenta using radiocarbon and radio-sulfur. Mus Norvegicus albinns (Rodentia) b. Development and growth of bones and teeth as shown by histochemical and histophysical methods. (Vertebrata) GRIGNON, G. — Lab. d'Histol., Dep. d'Embryol., Fac. de Med., 31 Rue Lionnois, NANCY (Meurthe 6 Moselle), France a. Developpement de I'hypophyse. (Aves) b. Developpement de I'organe sub-fornical. (Mammalia) GROBSTEIN, C. Ph.D.. M.I.I.E. — Dept of Biol.,Sci., Stanford Univ., PALO ALTO. Cal., U.S.A. 43 Grobstcin-Ham a. Tissue interaction and cellular relationships in relation to differentiation and morphogenesis. Miis nnisculus (Rodcntia) GRODZInSKI, Z. Prof. — Zaklad Anat. Porownawczej U. J. im. H. Hoyera. sw. Anny 6. KRAKOW, Poland GROENENDIJK— HUIJBERS, Mrs M. M. M.D. — Dept of Anat., Univ. of Saskatchewan. SASKATOON, Canada a. Investigation of the development of the sexual apparatus by means of implantation and castration experiments. Gallus domesticus (Aves) GRUENWALD, P. M.D. — Laboratory, Margaret Hague Maternity Hos- pital. CHfton Place. JERSEY CITY 4. N.J.. U.S.A. a. Systematic investigation of current cases of prenatal disease and mal- formation in autopsy material. Homo sapiens (Primates) h. Normal and abnormal expansion of the lungs in newborn infants (ex- perimental inflation with various media). Homo sapiens (Primates) c. Pathology of the placenta and its correlation with the outcome of the pregnancy. Homo sapiens (Primates) GRONEBERG. H. Ph.D., M.D., D.Sc. F.R.S.. F.I.I.E.. Prof. — Dept of Genetics. Univ. Coll. London. Gower St, LONDON W.C. 1, England a. Developmental genetics of the axial and appendicular skeleton; effects of major genes: development and genetics of "patch", a semidominant spotting gene with teratological effects in the homozygote. Mus musculus (Rodentia) GRONTHAL. E. Dr, Prof. — Hirnanat. Inst, der Psychiatr. Univ. Klinik. Med. Fak.. Waldau. BERN, Schwciz (no embryological work in progress) GUARDABASSI, Miss A. Dr — Inst, of comp. Anat., Via Giovanni Gio- litti 34, TORINO. Italy (Anura) a. The endolymphatic sac in tadpoles treated with thiouracil. Bufo vulgaris GUGGENHEIM. P. A.B.. M.D. — Dept of Anat.. School of Med.. The Creighton Univ., OMAHA. Nebraska. U.S.A. GUSTAFSON. T. Fil.Dr. M.I. I.E. — Wenner-Grens Inst, for exper. Biol.. Norrtullsgatan 16, STOCKHOLM Va., Sweden a. Studies on the mechanism of gastrulation. (Echinoidea) h. Growth promoting substances and vitamines in embryonic material. (Echinoidea), Xenopus spec. (Anura) c. The effect of various antimetabolites on embryonic development. (Echi- noidea) (in collaboration with S. HoRSTADIUS) d. Enzyme adaptation in embryonic and adult cells studied by means of tissue culture technique. GUTH L. A.B., M.D. — Section Devel. and Regen., Lab. of Neuroanat. Sci.. NINDB, Nat. Inst, of Health, BETHESDA, Md, U.S.A. a. Neuronal specificity in the autonomic nervous system. (Mammalia) GUYfiNOT, E. Dr Med., Dr Sci. — Inst, de Zool. et Anat. comp., Univ. de Geneve. Rue de Candolle. GENfiVE. Suisse GYLLENSTEN, L. J. .W Med.Dr — Dept of Histol., Karolinska Inst., Solnavagen 1, STOCKHOLM 60, Sweden a. Postnatal development of lymphatic system; endocrinological influences (thyroid, thymus). Cavia cobaya (Rodentia) b. Postnatal development of newborns in different oxygen concentrations, with special consideration to malformations of the eyes, lungs and car- diovascular system. Mus musculus (Rodentia) M HAAN, R. L. De M.A., Ph.D. — Dept of Embryol., Carnegie Inst, of Washington. Wolfe and Madison Sts. BALTIMORE 5. Md. U.S.A. a. Study of the development of acetylcholine synthesizing mechanisms with relation to the onset of spontaneous contractions in the embryonic heart. Gallus gallus (Aves) b. Cellular migration in the embryo during the time of fusion of the cardiac primordia, and the effects of drugs and altered ionic environments. Gallus gallus (Aves) HADORN, E. Dr Phil., F.I. I.E., Prof. — Zool.-vergl. Anat. Inst., Naturw. Fak., Univ. Ziirich, Kiinstlergasse 16, ZORICH 6, Schweiz HAGELIN, L. O. Fil.mag. — Zootom. Inst., Univ. of Stockholm, 116 Drott- ninggatan, STOCKHOLM, Sweden HAGET, A. Dr es Sci. — Lab. de Zool., Fac. des Sci. de Bordeaux, 40 Rue Lamartine, TALENCE, Gironde, France a. Analyse experimentale de la morphogenese embryonnaire de la tete. Leptinotarsa spec. (Coleoptera) HAGGQVIST, G. Prof. — Embryol. Dept, Histol. Inst., Karolinska Inst.. Solnavagen 1, STOCKHOLM 60, Sweden HAGSTRoM, B. E. B.A. — Wenner-Grens Inst, for exper. Biol., Norr- tullsgatan 16, STOCKHOLM Va., Sweden a. Physiology of fertilization. ( Echinodermata) HAJRA, B. M.Sc. — Dept of Zool., Presidency Coll., College St, CAL- CUTTA 12. India a. Investigation of morphogenesis by cytochemical means. Amoeba spec. (Protozoa) k. Effects of chemical transport in morphogenesis. Amoeba spec. (Coelen- terata) (in collaboration with S. MOOKERJEE) HALE. L. J. Ph.D. — Dept of Zool.. Univ. of Edinburgh. West Mains Rd. EDINBURGH 9, Scotland a. Morphogenetic features in asexual development. (Hydrozoa) HALL, E. K. Ph.D., D.Sc. — Dept of Anat., School of Med., Univ. of Louisville, 101 West Chestnut St. LOUISVILLE 2. Ky. U.S.A. a. Drug effects on embryonic hearts (atropine, nicotine, physostigmine). Rattus norvegicus (Rodentia) HALLIDAY. R. B.Sc, Ph.D. — Agr. Res. Council Unit of Embryol., Dept of Zool. Univ. of North Wales, BANGOR, Caernarvonshire, N. Wales a. Immunological relations of mother and young. (Mammalia) HAMA, T. M.A., D.Sc, Prof. — Biol. Lab.. Keia Univ.. YOKOHAMA. Hiyoshi, Japan a. Morphogenetical and chemical analysis of the organizer. Triturus pi/r- rhogaster (Urodela) h. Studies on the influence of the pterins and- their like upon development in various animals. ( Atthtopoda, Pisces, Amphibia, etc.j c. Developmental and chemical studies of the chromatophores. (Amphibia, Pisces) HAMARD. Miss M. — Lab. d'Embryol. exper.. Coll. de France, Place Marcehn Berthelot, PARIS Ve, France a. Morphologie comparee et morphogenese. (Ciliata) (en collaboration avec E. FAURE-FREMIET) HAMBURGER. K. Dr phil. — Biol. Inst, of the Carlsberg Foundation. 16, Tagensvej. COPENHAGEN N, Denmark 45 Hamburgcr-Har a. Studies on the biochemistry and physiology of synchicnized cell systems. Tetrahymcna pyriformis (Holotricha. Ciliata) (in collaboration with P. PLESNER and E. ZEUTHEN) HAMBURGER. V. Ph.D., F.I. I.E., Prof. — Dept of Zool., Washington Univ.. Lindell and Skinker Ave, ST LOUIS 5. Mo.. U.S.A. a. Neuro-embryology. Gallus domesticus (Aves) HAMILTON. H. L. B.A., M.S., Ph.D.. M.I. I.E., — Dept of Zool. and En- tomol., Div. of Sci., Iowa State Coll.. AMES, Iowa, U.S.A. a. Studies on the relation of enzyme systems to morphogenesis. Gallus domesticus (Aves) h. Factors influencing the differentiation of melanophores in tissue cultures. Gallus domesticus (Aves) HAMILTON. W. J. F.I.I.E., Prof. — Anat. Dept, Charing Cross Hosp. Med. School, 62 Chandos Place, LONDON W.C. 2, England a. Growth and atresia of the ovarian follicles. Mustela putorius furo L. (Carnivora) (in collaboration with R. J. HARRISON) b. Placentation and changes in reproductive tract, (Cervidae) (in collabo- ration with R. J. HARRISON) c. The development and structure of the placenta. Homo. (Primates) (in collaboration with J. D. BOYD, Cambridge) HAMMOND, W. S. Ph.D.. Prof. — Dept of Anat., School of Med., State Univ. of New York, 766 Irving Ave. SYRACUSE 10. N.Y., U.S.A. a. Development of the autonomic nervous system. Gallus domesticus (Aves) (in collaboration with C. L YNTEMA) b. Development of the visceral skeleton. Gallus domesticus (Aves) (in col- laboration with C. L. YNTEMA) c. Origin of tongue musculature. Gallus domesticus (Aves) HAMPfi, A. Lie. es Sci. — Lab. d'Embryol. exper. du Coll. de France, et Lab. d'Embryol. et de Teratol. exper, du C.N.R.S.. 11 Place Marcelin Berthelot, PARIS Ve, France — Lab. de Zool. et dEmbryol. exper., Inst, de Zool. et de Biol, gener., 12 Rue de I'Universite, STRASBOURG. France a. Etude de la regulation des ebauches des membres. Gallus gallus (Aves) h. Etude de la regulation du bourgeon de membre. Anas spec. (Aves) c. La differenciation sexuelle, par les methodes de greffes, de castration, d'injections d'hormones et d'explantations. Differenciation normale et inversion sexuelle des gonades, des voies genitales et des caracteres soma- tiques precoces. Gallus spec, and Anas spec. (Aves) (en collaboration avec Et. C. WOLFF, Mrs D. SCHEIB— PFLEGER, Miss B. SALZ- GEBER et G. STRUDEL) HANAOKA, K. I. D.Sc, Prof. — Dept of Biol.. Fac. of Lib. Arts and Sci.. Yamagata Univ., Koshirakawa-machi, YAMAGATA, Japan a. Neurosecretory hormones in relation to reproductive cycle. Potamon dehaani (Decapoda, Crustacea) b. Experimental studies of sex differentiation. Rana temporaria. Rhacopho- rus schlegelii (Anura), Hynobius lichenatus, H. nigrescens, Triturus pyrrhogaster (Urodela) HANSON, E. D. A.B.. Ph.D. — Osborn Zool. Lab., Yale Univ.. NEW HAVEN 11, Conn., U.S.A. a. Fate of UV damaged feeding organelles during fission and autogamy. Paramecium spec. (Holotricha. Ciliophora) 46 b. Distribution of ribonucleic acid during fission and autogamy. Paramecium spec. (Holotricha, Ciliophora) c. The effect of anti-metabolites on the development of feeding organelles. Paramecium spec. (Hohtricha, Ciliophora) HARA, K. B.Sc. M.Sc. — Hubrecht Lab., Intern. Embryol. Inst., Janskerk- hof 2, UTRECHT. Holland HARDER, W. Dr rer.nat. — Inst, fiir Fischereibiol. der Univ. Hamburg, Holstenwall 24, HAMBURG 36. Deutschland a. Post-embryonale Entwicklung, insbesondere die Umwandlungen des Verdauungsapparates wahrend der Metamorphose. Vergleichende Un- tersuchungen innerhalb zweier Familien. Clupea harengus, C. sprattus, C. pilchardus (Clupeidae), EngrauUs encrasicholus (Engraulidae, Teleostei) HARKMARK, W. Dr med. — Anat. Inst., Univ. of Oslo, OSLO, Norway a. Olivocerebellar relationships during embryogenesis. Mus rattus (Roden- tia) b. The histogenesis of the cerebellum with special emphasis on the Purkinje cells. Gallus domesticus (Aves) HARRIS, F. T. C. — Middlesex Hospital Medical School, LONDON W. 1, England a. Studies of cleavage processes. HARRIS, J. E. M.A.. Ph.D., Prof. — Dept of Zool., The Univ., BRISTOL 8, England a. Development of the nervous system and behaviour pattern. Scylliorhinus canicula, Petromyzon fluviatilis, Salmo spp. (Pisces) (in collaboration with H. P. WHITING) HARRIS, M. Ph.D., A.B., Prof. — Dept of Zool., Univ. of Cahf., BER- KELEY 4, Gal.. U.S.A. HARRISON, G. A. B.A., B.Sc. — Dept of Anat., Univ. of Liverpool, LIVERPOOL, England a. Growth and genetical selection at high temperatures. (Mammalia) h. The inheritance of skin colour. Homo sapiens (Primates) c. The genetics of obesity. Mus spec. (Rodentia) HARRISON, J. R. B.A., M.A., Ph.D. — Dept of Zool., Miami Univ., OXFORD, Ohio, U.S.A. a. I n V i t r o studies on the growth and differentiation of the retinal pig- ment in the embryonic eye: analysis of developmental factors contained in the yolk-albumen of the egg. Gallus domesticus (Aves) b. Effect of lowered incubation temperature on the development and poten- cies of the blastoderm. Gallus domesticus (Aves) HARRISON, R. G. M.A., D.M. — Dept of Anat.. Univ. of Liverpool. LIVERPOOL, England a. The dependence of spermatogenesis on the vascularization of the testis. (Mammalia) b. The effect of low temperature on spermatogenesis. (Mammalia) HARRISON, R. G. M.D., Ph.D., Sc.D., L.L.D., F.I.I.E.. ProL (Emer.) — Osborn Zool. Lab., Yale Univ., NEW HAVEN 11, Conn., U.S.A. a. Development of limbs with reference to the roles played by ectoderm and mesoderm. Amby stoma (various species) (Urodela) b. Induction and symmetry relations in the development of the internsJ ear. Ambystoma punctatum (Urodela) 47 Har-Heu HARRISON. R. J. M.A., D.Sc, M.D. — Anat. Dept. London Hosp. Med. Coll.. Turner St. LONDON E. 1. England HARRISON MATTHEWS. L. D.Sc. F.R.S. — c/o The Zool. Soc. of London. England HART. D. S. M.A. — Canterbury Agric. Coll.. Lincoln Coll., CANTER- BURY. New Zealand HARTE. Miss C. Dr. Prof. — Inst, fiir Entwicklungsphysiologie, Univ. zu Koln, Gyrhofstr. 17. KOLN-LINDENTHAL. Deutschland HARTUNG. E. W. Ph.D. — Dept of Zoo!.. Univ. of Rhode Island. KINGSTON. R.I.. U.S.A. a. Factors influencing tumor incidence. A study of the developmental, en- vironmental and genetic factors operative in the development of socalled "melanin tumors". Drosophila melanogaster (Diptera) b. Studies on symmetry. (Gastropoda) c. Studies on tissue homotransplantation. (Amphibia) HARTWIG. H. Dr Phil. — Zool. Inst, der Univ. Koln. Kerpenerstr. 13, K5LN-LINDENTHAL, Deutschland a. Wirkungsmechanismus von Schilddriisenhormon. HARVEY, Mrs E. BROWNE A.B.. M.A.. Ph.D.. Sc.D., F.I.I.E. — Dept of Biol., Princeton Univ., PRINCETON, N.J., U.S.A. a. Centrifuging eggs, and development of fractions obtained by centrifugal force. Parthenogenetic merogony or development without nuclei. (Echi- noidea) h. Book, including classified compilation of all experimental work. Arbacia punctulata (Echinoidea) c. Moving pictures of metamorphosis and of the natural history (in color). Arbacia punctulata (Echinoidea) d. Determination of sex by electrical method. Arbacia punctulata (Echinoi- dea) e. Prophase of the egg. Arbacia punctulata (Echinoidea) f. Study of a crescent-shaped figure in the egg. Arbacia punctulata (Echinoidea) g. Effect of "theelin" on the egg. Arbacia punctulata (Echinoidea) HARVEY. E. B. B.S., M.A.. Ph.D. — Dept of Zool., Univ. of Cahf.. DAVIS. Cal.. U.S.A. HASSA, O. Dr Veter.Sc. — Inst, of Histol. and Embryol., Veter. Coll. of the Univ., ANKARA, Turkey (no embryological work in progress) HAY, Miss D. Lic.es Sci. — Lab. de Zool. et d'Embryol. exper.. Inst, de Zool. et de Biol, gener., 12 Rue de I'Universite, STRASBOURG, France a. Analyse du processus de regulation et de paragenese. (Selachii) (en collaboration avec J. H. VIVIEN et J. SCHOTT) HAYASHI. Y. M.A. — Biol. Inst., Fac. of Sci., Nagoya Univ., Chigusa-Ku. NAGOYA. Japan — (temporarily: Lab. of Chem. Embryol., Med. Center, Colorado Univ., 4200 East Ninth Ave, DENVER 20, Col., U.S.A.) a. Biochemical analysis of muscle differentiation. Gallus spec. (Aves) HAYEK. H. Dr med., Drphil.. o.Prof. — Anat. Inst.. Wahringerstr. 13, WIEN 9, Oesterreich HEATH. H. D. Ph.D. — Dept of Biol. Sci.. Stanford Univ., STANFORD. Cal.. U.S.A. 48 HECKERMAN, R. O. B.S., M.S.. Ph.D. — Dept of Biol. (Embryol. Divi- sion), Duquesne Univ, PITTSBURGH 19, Pa, U.S.A. a. Differentiation of cells in the islet tissue of the embryonic pancreas. Gallus domesticus (Aves), Sus domesticus (Mammalia) b. Islet tissue regeneration. Gallus domesticus (Aves) HEILBRUNN, L. V. Ph.D., Prof. — Dept of Zool., Univ. of Pennsylvania, PHILADELPHIA 4. Pa, U.S.A. HEIM W. G. A.B.. M.A., Ph.D. — Dept of Biol.. Wayne State Univ.. DETROIT 2, Mich., U.S.A. a. Role of catalase in growth and neoplasia. Mus musculus, Mus rattus (Rodentia) HEMMINGS. W. A. B.A. — Agr. Res. Council Unit of Embryol., Dept of Zool.. Univ. Coll. of North Wales, BANGOR. Caernarvonshire. N. Wales a. Immunological relations of mother and fetus. (Mammalia) HENLEY, Miss C. M.A.. Ph.D. — Dept of Zool., Univ. of North Carolina, CHAPEL HILL, N.C., U.S.A. HENZEN, W. — Zool. Inst, der Univ. Bern, Sahlistr. 8, BERN, Schweiz HERLANT— MEEWIS, Mrs H. Dr Zool. — Lab. de Zool., Fac. des Sci., Inst. Zool. Torley-Rousseau, Univ. libre de Bruxelles, 50 Avenue F. D. Roosevelt, BRUXELLES, Belgique. HERRMANN. H. Dr. Prof. — Div. Chem. Embryol.. Med. Center, Univ. of Colorado, 4200 East Ninth Ave, DENVER 20, Colo, U.S.A. a. Chemistry of muscle differentiation. Gallus spec. (Aves) in collaboration with I. R. KONIGSBERG and A. J. SAMUELS) b. Study of developmental disturbances related to nutritional deficiencies investigated by application of anti-vitamins and anti-amino acids to the intact egg and to explants (somites). (Aves) (in collaboration with Mrs U. ROTHFELS KONIGSBERG) c. Analysis of muscle tissue grown in vitro. Homo sapiens (Primates) (in collaboration with Mrs U. ROTHFELS KONIGSBERG) HERTIG, A. T. B.S., M.D., Prof. — Dept of Pathol, Harvard Univ., Med. School, 25 Shattuck St, BOSTON 15, Mass., U.S.A. — Boston Lying-in Hospital, 221 Longwood Ave, BOSTON 15, Mass. — Free Hospital for Women. 245 Pond Ave, BROOKLINE, Mass. a. Histochemical observations on early fertilized ova of less than 14 days age. Homo (Primates) (in collaboration with J. ROCK, W. J. MULLI- GAN and Miss E. C. ADAMS) b. Histochemical studies on developing embryos. Homo (Primates) (in collaboration with D. G. McKAY and Miss E. C. ADAMS) c. Histochemical studies on abnormal trophoblast with special reference to hydatidiform mole and chorionepithelioma. Homo (Primates) (in colla- boration with D. G. McKAY. K. BENIRSCHKE. W. BARDAWIL and Miss E. C. ADAMS) HESS. O. Dr rer.nat. — Zool. Inst, der Technischen Hochschule. DARM- STADT, Deutschland a. Entwicklungsphysiologie. Bithynia tentaculata, Limnaea stagnalis (Gas- tropoda) HEUSER. C H. F.I.I.E.. Prof. — Dept of Micr. Anat.. Med. Coll. of Georgia. AUGUSTA, Ga, U.S.A. 49 Hic-Hor HICKS, S. P. B.A.. M.D. — Lab. of Pathol.. New England Deaconess Hosp. & Harvard Med. School, 195 Pilgrim Road, BOSTON 15, Mass.. U.S.A. a. Ionizing radiation as an e.xtirpative tool in experimental mammalian em- bryology. Rattus spec, Miis spec. (Rodentia) HIGHNAM. K. C. M.Sc, Ph.D. — Dept of Zool.. Univ. of Sheffield, SHEFFIELD, England a. Influence of hormones on metamorphosis and pupal diapause. (Lepido- ptera) HILLEMANN, H. H. B.S., M.A., Ph.D. — Dept of Zool., Oregon State Coll.. CORVALLIS, Ore., U.S.A. HINRICHSEN, K. Dr Med. — Anat. Inst, der Univ., Burgstrasse 51, GOT- TINGEN, Deutschland a. Histochemie von Entwicklungsprozessen, spez. Ribonucleinsaure (Extre mitiitencntwicklung, Zahnentwicklung). Mus musculus (Rodentia) HINTZSCHE. E. Dr Med.. Prof.ord. — Anat. Inst., Buhlstr. 26, BERN Schweiz a. Anorganischer Stoffwechsel. Fermentchemische Untersuchungen. Homo sapiens and other spp. (Mammalia) b. Experimentelle Studien iiber Zellvermehrung in Gewebekulturen. Ein wirkung fordernder und hemmender Substanzen. Homo sapiens (Pri mates) c. Wirkung der Rontgen- und Betatronbestrahlung auf Gev.-cbekulturen Mus spec, Homo sapiens (Mammalia) HIRAIWA, Y. K. D.Sc — Lab. of Zool.. Fac of Agric, Kyushu Univ. FUKUOKA. Japan HIRAMOTO, Y. B.Sc, M.A. — Misaki Marine Biol. Station. MISAKI Kanagawa-ken, Japan a. Cell division. Mespilia spec, Pseudocentrotus spec, Hemicentrotus spec. Clypeaster spec. (Echinoidea) h. Physical properties of marine eggs. Mespilia spec, Hemicentrotus spec. Clypeaster spec. (Echinoidea) HIRATA. A. A. A.B.. M.A. — Dept of Zool.. Univ. of Calif., LOS ANGE LES 24, Cal.. U.S.A. HISHIDA. T. M.A. — Biol. Inst.. Fac. of Sci., Nagoya Univ., Chigusa-Ku NAGOYA. Japan a. Metabolic analysis of early development. Oryzias latipes (Teleostei) (in collaboration with E. NAKANO) b. Melanin formation in color phenotypes. Oryzias latipes (Teleostei) (in collaboration with T. YAMAMOTO and H. TOMITA) c Xanthophores and xanthophyll deposition in color phenotypes. Oryzias latipes (Teleostei) HJELMMAN. G. Prof. — Anat. Inst.. Univ. of Helsinki, HELSINKI. Fin- land (no embryological work in progress) HOADLEY, L. F.I.I. E., Prof. — Biol. Lab., Harvard Univ.. Divinitv Ave. CAMBRIDGE 38, Mass.. U.S.A. HOEK, J. V. d. M.V. Sc — Veter. Anat. and Embryol. Inst.. Bekkerstr. 141. UTRECHT, Holland HOESSELS. Miss E. L. M. J. Ph.D. — Veter. Anat. and Embryol. Inst.. UTRECHT. Holland 50 a. Photographical series of normal development. Gallus domesticus (Aves) b. Photographical series of organ development. Domestic animals (Mam- malia) c. Cholinesterase determinations in embryos. Domestic animals (Mam- malia) HOFF-JoRGENSEN, E. Dr Phil. — Inst, of Biochem., Fac. of Med., Univ. of Copenhagen. Juliane Mariesvej 30, COPENHAGEN ^, Denmark HOGE, A. — Instituto Butantan, SAO PAULO. Brasil a. Intersexuality. Bothrops insularis Amand (Ophilia) (in collaboration with H. BELLVOMINI and G. SCHREIBER, Belo Horizonte) HOGUE. Miss M. J. A.B., Ph.D.. Assoc. Prof. (Em.) — Dept of Anat, School of Med., Univ. of Pennsylvania. PHILADELPHIA 4. Pa, U.S.A. HOLLANDER, W. F. B.A.. M.S.. Ph.D. — Dept of Genetics. Iowa State Coll., AMES, Iowa. U.S.A. a. Genetic mutants — polydactylism, lethal types. Mus musculus (Rodentia) b. X-ray induced dominant lethal effects. Mas musculus (Rodentia) c. X-ray induced chromosome-translocation effects. Mus musculus (Roden- tia) d. Genetic mutants. Columba livia (Aves) HOLM, K. A. Fil.Dr — Zool. Inst., Uppsala Univ., UPPSALA, Sweden a. Experimental investigation of the embryo (determination, prospective significance of embryonic areas). (Araneae. Arachnoidea) fHOLMDAHL, D. E. Med.Dr. F.I.I.E.. Prof. (Emer.) — Anat. Inst., Upp- sala Univ., UPPSALA. Sweden (deceased) HOLST CHRISTENSEN. P. J. Dr Phil. — Inst, for Aim. Zool.. Univer- sitetsparken 3, COPENHAGEN P. Denmark a. Continued investigations on embryology. (Insecta) b. Studies on larval hair development. (Lepidoptera) c. Studies on the development of the lungs. (Mammalia) HOLTER. H. Ph.D.. M.I.I.E. — Physiol. Dept. Carlsberg Lab.. 10 Gl. Carlsbergvej. COPENHAGEN, Valby. Denmark (no embryological work in progress) HOLTFRETER. J. K. F. Ph.D.. F.I.I.E., Prof. — Dept of Biol.. Coll. of Arts and Sci., Univ. of Rochester. ROCHESTER 20. N.Y., U.S.A. a. Studies on the diffusibility and toxicity of inductive agents. (Urodela) b. Stimuli initiating both neurogenesis and carcinogenesis. (Amphibia) HOLTZER, H. Ph.D. — Dept of Anat., School of Med., Univ. of Penn- sylvania. PHILADELPHIA 4, Pa. U.S.A. HOLYOKE. E. A. Ph.D. — Dept of Anat.. Coll. of Med.. Univ. of Nebras- ka. OMAHA 5. Nebraska. U.S.A. HOOKER. D. Ph.D., Sc.D.(Hon.). M.I.I.E.. Prof. Emer. — 110 Livingston St, NEW HAVEN 11, Conn., U.S.A. — Osborn Zool. Lab., Yale Univ., NEW HAVEN 11. Conn.. U.S.A. a. Study of the physiological responses of fetuses. Homo sapiens (Primates) b. Study of the reactivity of the fetus to exteroceptive stimulation. Homo sapiens (Primates) c. Responses of fetuses to double simultaneous stimulation. Homo sapiens (Primates) (in collaboration with Miss T. HUMPHREY) HORI, R. M.Sc. — Biol. Inst.. Fac. of Lib. Arts. Toyama Univ., TOYAMA. Japan 51 Hori-Imm a. Electrical phenomena accompanying fertilization. Ilemicentrotus pul- cherrimus, Pseudocentrotus depressus (Echinoidea), Oryzias latipes (Telcostei) HORN. E. C. B.S., A.M., Ph.D., Prof. — Dept of Zool.. Duke Univ.. DURHAM, N.C.. U.S.A. a. Qualitative and quantitative analysis of nucleoprotein during develop- ment. Gallus gallus (Avcs) b. Effects of nucleoprotein on embryonic development. Gallus gallus (Aves) HORSTADIUS. S. Fil.Dr. F.I. I.E.. Prof. — Zool. Inst.. Uppsala Univ., UPPSALA. Sweden a. Determination in the egg: Analysis of the gradients and the processes behind them. (Echinoidea) h. Determination within the head. Ambystoma spec. (Urodela) c. The effect of various antimetabolites on embryonic development. (Echi- noidea) (in collaboration with T. GUSTAFSON) HORSTMANN, E. Dr Med. et Phil.. Prof. — Anat. Inst, der Univ. Kiel. Neue Univ.. Haus 30, KIEL. Deutschland a. Embryology of neuroglia. (Vertebrata) HUBER. W. D.Sc. — Museum d'Histoire Naturelle. BERNE, Suisse a. Developpement de la tete. Etude morphologique et experimentale de la forme encephalique en rapport avec le crane; courbures et redressement de la tete embryonnaire; position des yeux; analyse des races a forme encephalique aberrante. Gallus domesticus (Aves), Canis familiaris (Carnivora) HUBL, H. Dr rer.nat. — Zool. Inst, der Univ.. Naturw. Fak.. Rontgenring 10. WORZBURG, Deutschland a. Untersuchungen iiber die neurosekretorischen Zellcn im Gehirn und deren Einfluss auf die Regeneration. (Lumbricidae, Oligochaeta) b. Weitere Untersuchungen iiber die Beziehungen zwischen Nervensystem und Regeneration. (Lumbricidae, Oligochaeta) HUBLfi, J. DrZool.Sci. — Lab. voor Zool.. Afd. Morphol., Universiteits- straat 14, GENT. Belgie a. Experimental embryology. (Aves) HUGHES. A. F. W. M.A.. Ph.D.. Sc.D. — Anat. School. Univ. of Cam- bridge. CAMBRIDGE. England HUGHES— GLASTONE. Mrs S. F.D.S. — Anat. School. Univ. of Cam- bridge. CAMBRIDGE, England HULTIN. J. M. T. Ph.D., M.I.I.E. — Wenner-Grens Inst, for exper. Biol., Norrtullsgatan 16, STOCKHOLM Va., Sweden a. Nucleotide and carbohydrate metabolism of embryos in connection with determination. (Echinoidea) HUMMEL, Miss K. P. Ph.D. — Roscoe B. Jackson Memorial Lab.. BAR HARBOR, Me. U.S.A. a. Studies on histogenesis of anomalies resulting from the gene "disorgani- zation". Mus musculus (Rodentia) b. Studies on the development of situs viscerum inversus resulting from a recessive gene. Mus musculus (Rodentia) HUMPHREY, R. R. A.M.. Ph.D.. F.I.I.E.. Prof. - - Dept of Zool.. Indiana Univ.. BLOOMINGTON, Ind., U.S.A. 52 HUMPHREY. Miss T. M.D., Ph.D., M.I.I.E. — Dept of Anat., School of Med.. Univ. of Pittsburgh. PITTSBURGH 13. Pa. U.S.A. a. Continuation of studies on the trigeminal nerve in fetuses. Morphological study based on serially sectioned, pyridine silver impregnated embryos. Correlation of the anatomical findings on embryos with neurological ob- servations and neurosurgical procedures. Homo sapiens (Primates) h. Pancreatic developmental studies. Homo sapiens (Primates) c. Responses of fetuses to double simultaneous stimulation. Homo sapiens (Primates) (in collaboration with D. HOOKER) HUMPHRIES. A. A., Jr. Ph.D. — Dept of Biol. Emory Univ.. ATLAN- TA, Ga, U.S.A. a. Natural inhibition of meiosis in unfertilized amphibian oocytes. Triturus viridescens (Urodela) b. Developmental genetics. Triturus viridescens (Urodela) HUNT, E. L. Ph.D.. Prof. — Dept of Biol.. Emory Univ.. ATLANTA, Ga, U.S.A. a. Studies on the distribution of radio-iodine. (Amphibia) h. Studies on the estrus cycle and gestation in alloxan-diabetic animals. R&ttus noruegicus (Rodentia) HUYGNARD, C. Dr en Med., Dr es Sci. — Lab. d'Embryol., Fac. dc Med., Rue des Sts Peres. PARIS Vie. France. a. Greffes intraoculaires de membres. Mus rattus (Rodentia) b. Desensibilisation a la greffe. Mus rattus (Rodentia) HYDeN, H. M.D. — Dept of Histol., Fac. of Med.. Univ. of Gothenburg. 4:de Langgatan 7, GoTEBORG C, Sweden HYLBOM, J. R. Fil.lic. — Zootom. Inst., Univ. of Stockholm, 70A Rad- m.ansgatan, STOCKHOLM, Sweden a. Development of larvae, including metamorphosis. Pilidium spec. (Nemer- tini, Plathelminthes) ICHIKAWA, A. M.Sc, D.Sc, Prof. — Dept of Zool.. Fac. of Sci., Hokkaido Univ., North 8. West 5, SAPPORO, Japan a. Development and life-history of Japanese forms. (Rhizocephala, Crus- tacea) ICHIKAWA, M. Ph.D., Prof. — Lab. of Embryol. and Exper. Morphol.. Zool. Inst., Dept of Sci., Kyoto Univ., KYOTO, Japan a. Hormonal mechanism of metamorphosis. Philosamia cynthia ricini. Bom- byx mori, Luehdorfia japonica (Lepidoptera) (in collaboration with Mrs J. NISHIITSUTSUJI— UWO) IGNATJEVA, Mrs G. M. Cand. Biol. Sci. — Inst, of Animal Morphol. of the Acad, of Sci. of the U.S.S.R., Bolshaja Kalushskaja 33. MOSCOW V-71, U.S.S.R. a. The hatching enzyme and the conditions of hatching. Huso huso, Acipenser giildenstadti. A. stellatus (Acipenseriformes, Chondrostei) IKUSHIMA, N. — Lab. of Embryol. and Exper. Morphol., Zool. Inst., Dept of Sci., Kyoto Univ., KYOTO, Japan a. Mechanism of the morphogenetic movement in the embryo. Triturus pyr- rhogastev, Hynobius nebulosus (Urodela) IMAIZUMI. T. — Zool. Inst., Fac. of Sci., Univ. of Kyoto, KYOTO, Japan IMMERS, J. Ph.lic. — Wenner-Grens Inst, for exper. Biol., Norrtullsgatan 16, STOCKHOLM Va., Sweden a. Carbohydrates in embryonic development. (Echinoidea) 53 Immcrs-Joc 1. Changes in the contents of polysaccharide esterial sulphate. Para- centrotus lividus 2. Metabolism of monosaccharides (galactose, glucose, mannose. gluco- samine, etc.). Arbacia lixula. Echinus esculentus, Paracentrotus livi- dus, etc. 3. Biochemistry of fertilization membrane. Echinus esculentus, Para- centrotus lividus. Strongylocentrotus droebachiensis, etc. INCH. Miss F. E. M.Sc. — Dept of Zool., Bedford Coll.. Regent's Park, LONDON N.W. 1. England a. Development. Arion spec. (Pulmonata, Gastropoda) INGEN, Miss H. C. van M.B. — Anat.-Embryol. Lab. of the Univ., Fac. of Med., Wassenaarsewcg, Boerhaavekwartier, LEIDEN, Holland a. Heart and vessels in congenital malformations. Homo sapiens (Prima- tes) (in collaboration with H. A. SNELLEN, J. DANKMEIJER and Miss A. DEKKER) b. Ductus arteriosus before and after birth. Mus norvegicus albinus (Roden- tia). Homo sapiens (Primates) INOUE, Miss K. Dr — Dept of Pathol.. School of Med., Univ. of Kana- zawa, KANAZAWA, Japan a. Immunochemical analysis of the early embryonic development (in colla- boration with T. ISHIKAWA). b. Induced enzymatic systems of the early embryonic development (in col- laboration with T. ISHIKAWA). ISHIDA, J. DrSci. — Zool. Inst.. Fac. of Sci.. Tokyo Univ.. TOKYO. Japan a. Phosporus metabolism in eggs. Oryzias spec. (Teleostei) ISHIKAWA. M. M.A. — Marine Biol. Station, Nagoya Univ., Sugashima- cho, TOBA, Mie-ken, Japan a. Physiological studies on fertilization and artificial parthenogenesis. He- micentrotus pulcherrimus, Pseudocentrotus depressus (Echinoidea) (in collaboration with M. SUGIYAMA) ISHIKAWA, T. Dr — Dept of Pathol., School of Med., Univ. of Kana- zawa, KANAZAWA, Japan a. Immunochemical analysis of the early embryonic development (in colla- boration with Miss K. INOUE). b. Induced enzymatic systems of the early embryonic development (in col- laboration with Miss K. INOUE). ISINGS. J. M.Sc. — Central Lab. T.N.O.. Julianalaan 134, DELFT. Hol- land a. Development of silk gland. Bombyx mori. Tineola biselliella (Lepidop- tera) b. Development of hair (with the aid of radio-autography). Mus musculus (Rodentia) ISLAM. A. Ph.D. — Dept of Zool., Government Coll., LAHORE. Pakistan a. Experiments on regional determination. Gallus domesticus (Aves) b. The early embryology. Bufo melanostictus, Rana tigrina (Anura) ITO, S. — Dept of Biol., Fac. of Sci., Kumamoto Univ.. KUMAMOTO-Shi, Japan a. Studies on activation. Oryzias latipes, Plecoglossus altivelis (Teleostei) b. Permeability of the egg at the time of fertilization. Oryzias latipes, Plecoglossus altivelis (Teleostei) 54 c. Effect of outer medium upon the cortical change. Oryzias latipes, Pleco- glossus altivelis (Teleostei) ITO, T. Dr Agr. — Sericuh. Exper. Stat.. Koenji, Suginami-ku, TOKYO, Japan a. Respiratory metaboHsm during metamorphosis. Bombyx mod (Lepidop- tera) b. Histology and cytology of the integument. Bombyx mod (Lepidoptera) c. Glycolytic metabolism during metamorphosis. Bombyx mod (Lepidop- tera) IWASAWA. H. M.Sc. — Biol. Inst., Fac. of Sci., Niigata Univ., NIIGA- TA, Japan a. Embryological study on endocrine correlation. (Anura) b. Mechanism of thiourea-induced sex-reversal. (Anura) JACOBSON, A. A.B. — Dept of Biol. Sci., Stanford Univ., STANFORD, Cal., U.S.A. JACOBSON, D. C.-O. Fil.mag. — Zool. Inst., Uppsala Univ., UPPSALA, Sweden a. Determination of the central nervous system. Ambustoma spec. (Uro- dela) " U.S.A. JAFFE. L. F. B.S., Ph.D. — Brandeis Univ., WALTHAM 54, Mass., a. Development of polarity of egg; studied by analyzing effects of polarized illumination and of near-by eggs. Fucus furcatus (Fucales, Algae) JAFFEE. O. C. B.A., M.S., Ph.D. — Dept of Anat., School of Med.. Univ. of Arkansas, LITTLE ROCK, Arkansas, U.S.A. (no embryological work in progress) JAGER. B. de M.Sc. — Division of Fisheries, Beach Road, Sea Point. CAPE TOWN. South Africa a. Embryoloay. Trachurus trachurus Linn. (Percomorphi, Neopterygii) JAGERSTEN.^K. G. M. Fil.Dr. Prof. — Zool. Inst., Uppsala Univ., UPP- SALA. Sweden a. Larval development. (Progonophora) JANSEN, J. M.D. — Anat. Inst., Univ. of Oslo. OSLO. Norway (no embryological work in progress) JANSEN. J. G. O. B.Sc. — Hubrecht Lab., Intern. Embryol. Inst., jans- kerkhof 2. UTRECHT. Holland a. Analysis of time relationships in competence of ectoderm for activating and transforming influences. Ambystoma mexicanum (Urodela) JAVA. Miss Y. M.B.. B.S. — Dept of Anat., Med. Coll., Osmania Univ.. HYDERABAD, India a. The development of the vascular supply of muscle. (Mammalia) JIT, I. M.B., M.S.. Ph.D. — Dept of Anat.. Med. Coll. Amritsar. AMRIT- SAR. Punjab. India a. Histogenesis of vermiform appendix. Homo sapiens (Pdmates) b. Development of the ileo-colic valve and its frenula. Homo sapiens (Pdmates) c. Development of the splanchnic nerves. Homo sapiens (Pdmates) d. Prenatal ossification of some bones. Homo sapiens (Pdmates) e. Development of the transverse folds of the rectum. Homo sapiens (Pd- mates) JOCHEMS, D. J. Anat.-Embryol. Inst., Municipal Univ. of Amsterdam, Mauritskade 61, AMSTERDAM O. Holland 55 JochemS'Kam a. Attempts to analize the differences in regenerative capacity between Amphibia and Mammaha. Amby stoma mexicanum (Urodela) . Mus spec. (RoJentia) (in collaboration with H. A. L. TRAMPUSCH) JOHNELS. A. G. Phil.Dr — Zootom. Inst.. Univ. of Stockholm, Radmans- gatan 70A. STOCKHOLM. Sweden a. Development and morphology of the autonomic nervous system. ^Lower Vertebrata) JOHNEN, Miss A. G. Dr Phil. — Zool. Inst, der Univ. Koln. Kerpenerstr. 13. KOLN-LINDENTHAL, Deutschland a. Die Wirkungsspezifitat abnormer Induktoren in der Entwicklung. (Am- phibia) h. Die Bedeutung des Zeitfaktors beim Induktionsvorgang. Ambystoma spec, Tritunis spec. (Urodela) JOHNSON. B. H. — Dept of Zool.. Indiana Univ., BLOOMINGTON, Ind., U.S.A. JOHNSON, D. C. B.S.. M.S., Ph.D. — Dept of Zool., State Univ. of Iowa. IOWA CITY. Iowa. U.S.A. a. Physiology of reproduction: hypophyseal-gonadal interrelationships by the use of parabiosis. JOHNSON, F. R. M.D.. B.Ch., B.A.O. — Dept of Anat.. Fac. of Med., Univ. of Sheffield, SHEFFIELD, England a. Histochemical studies of various tissues. (Mammalia) h. Epithelial regeneration in various organs. (Mammalia) JOHNSON. G. Lic.es Sci. — Lab. de Zool.. Fac. des Sci.. POITIERS, Vienne, France a. Hermaphroditism. (Rhyscotidae. Isopoda, Crustacea) JONES, B. M. D.Sc. — Dept of Zool.. Univ. of Edinburgh. West Mains Rd. EDINBURGH 9. Scotland a. Embryonic endocrinology. Locustana pardalina. Locustana migratoria (Orthoptera) h. Surface chemical properties of extra-embryonic fluid. Locusta migratoria (Orthoptera). Gallus gallus (Aves) JONES, O. P. Ph.D., M.D. — Dept of Anat.. Univ. of Buffalo Med. School 3435 Main St. BUFFALO 14. N.Y.. U.S.A. a. Embryonic blood cells in the yolk sac. Rattus spec. (Rodentia) JONES, W. E. B.Sc. — Marine Biol. Stat.. Univ. Coll. of North Wales, MENAI BRIDGE. Anglesey, N. Wales a. Spore division and early development of thallus. (Rhodophyceae: Gigar- tinales) JOST. A. D. Dr Sc. M.I.I. E.. Prof. — Lab. de Physiol, comp.. Fac. des Sci.. Univ. de Paris. 12 Rue Cuvier. PARIS Ve. France a. Endocrinologie foetale. Rattus norvegicus (Rodentia) . Oryctolagus cuni- cuius (Lagomorpha) b. Differenciation sexuelle. Rattus norvegicus (Rodentia) . Oryctolagus cuniculus (Lagomorpha) c. Anomalies hereditaires ou experimentales des extremites (acroblapsie). Mus musculus. Rattus norvegicus (Rodentia) . Oryctolagus cuniculus (Lagomorpha) JOUBERT. D. M. M.Sc. Ph.D. — Dept of Animal Husbandry. Univ. of Pretoria. PRETORIA. South Africa (no embryological work in progress) 56 JURA, Cz. D.Sc. — Zool. Dept of the Jagiellonian Univ.. St Anne 6. KRA- KOW, Poland a. Experimental studies on development. Melasoma populi L. (Coleoptera) b. Histochemical studies on development. Melasoma populi L. (Coleoptera) (in collaboration with Miss A. KRZYSTOFOWICZ and Miss B. WgGLARSKA) c. Development of the digestive system. Phyllobius glaucus Scop. (Curcu- lionidae, Coleoptera) JURAND, A. DrBiol. — Biol, and Embryol. Inst., Med. Academy, KRA- KOW. Poland a. The influence of drugs of the nervous system on regeneration (sodium bromide; coffeine). Xenopus laevis Daud. (Anura) h. The phenomenon of neoteny. Xenopus laevis Daud. (Anura) c. Action of triethanomelamine (T.E.M.) on early stages. Mus musculus (Rodentia) KAJI. S. — Biol. Lab., Dept of Sci., Konan Univ., KOBE, Japan a. Chemical influence upon the facet-forming faculty of the Bar eye. Drosophila spec. (Dipt era) KAJISHIMA, T. M.A. — Biol. Inst.. Fac. of Sci.. Nagoya Univ., Chigusa- Ku, NAGOYA. Japan a. Experimental analysis of the development of genetical characters. Carassius auratus (L) (Teleostei) KALIN. J. Prof. — Zool.-vergl.anat. Inst, der Univ., FREIBURG, Schweiz a. Morphogenese des Schadels mit besonderer Beriicksichtigung des allo- metrischen Wachstums. (Primates) h. Der Ossifikationsmodus und seine experimentelle Beeinfliissung. Xeno- pus laevis (Anura) KALLeN, a. J. B. — Tornblad-Inst. for comp. Embryol.. Biskopsgatan 7, LUND, Sweden a. Regulation of mitotic rate in developing neural tube. Xenopus laevis (Anura) h. Differentiation capacity of neural tube cells i n v i t r o. Gallus domesticus (Aves) KALTENBACH, Mrs J. C. B.S., M.A.. Ph.D. — Dept of Biol. Sci., North- western Univ.. EVANSTON, 111., U.S.A. a. Serological study of proteins during early development. Paracentrotus lividus (Echinodermata) (in collaboration with H. P. PERLMANN, Stockholm Va.. Sweden) b. Direct, local metamorphic effects by thyroxine and thyroxine analogues. Rana pipiens (Anura) c. Serological study of proteins during met-amorphosis. Rana pipiens (Anura) KAMEL, A. B.Sc, M.Sc, Ph.D. — Fac. of Sci.. Ain Shams Univ.. Abassia. CAIRO. Egypt a. The study of early developmental stages. (Anura; Squamata; Reptilia) h. The study of early developmental stages with special reference to the skeletal system. Gambusia affinis, Tilapia nilotica (Teleostei) KAMER. J. C. van de Dr Sc. — Zool. Lab. der Rijks Univ., Janskerkhof 3, UTRECHT, Holland a. Normal development and cytology of the pineal region. Anoptichthys Jordanii (Pisces) 57 Kan-Kie KANAGASUNTHERAM. R. M.B.B.S.. Ph.D. — Dept of Anat.. Fac. of Med.. Univ. of Cc>lon. Kynsc>' Rd. COLOMBO 8. Ceylon KANATANI. H. B.Sc.. M.A. — Misaki Marine Biol. Station. MISAKI. Kana^awa-ken. Japan a. Regeneration. Dugesia gonocephala (Tricladidea. Turbellaria) b. Mechanism of gastrulation. (Echinoidea) KANE R E. S.B.. Ph.D. — Dept of Biophvsics. The Johns Hopkins Univ.. Charles and 34tli Sts. BALTIMORE IS. Md. U.S.A. a. Physical and chemical studies on the proteins of the egg, v^nth particular relation to cell di\ision. Arbacia punctulata. Strongylocentrotus purpura- tus (Echinoidea) KANOH. Y. D.Sc. — Dept of Zool.. Fac. of Sci.. Hokkaido Univ.. North 8. West 5. SAPPORO. Japan a. Electronmicroscope obsers'ation of spermatozoa and fertilization process. ^Cyclostomata) h. Sperm activation at the time of fertilization. Clupea pallasii (Teleostei) c. C%tochcmical investigations on development. (Telecstei) (in collabora- tion uith T. S. YANIAMOTO) KARASAKL S. B.Sc. NLA. — Biol. Inst.. Fac. of Sci.. Nagoya Univ.. Chigusa-Ku. NAGOYA. Japan a. Electronmicrcscopic study of elaboration of the cell structures during the early phase of differentiation. Triturus pyrrhogaster fUrodela) (in col- laboration uith T. YAM AD A) b. Ultrastructure of yolk platelets studied by electronmicroscopy and elec- tron diffraction. Triturus pyrrhogaster fUrodela) KARCZNL^R. A. G. Ph.D. — Stritch School of Med.. Univ. of Lovola. 706 South Wolcott Ave. CHICAGO 12. 111.. U.S.A. (no embr\*ological work in progress) KARTHAUSER. M:ss H. M. B.Sc. — Dept of Embr\'ol.. Univ. Coll. Lon- don. Gower St. LONDON W.C. 1. England a. Studv of cell relations in tissue culture. Gallus domesticus (Aves) (in collaboration with M. ABERCROMBIE) KATAKUR,^. Y. M.A. — Biol. Lab.. Keio Univ.. YOKOHAMA. Hiyoshi. Japan a. Development of the se.x characters. Armadillidium vulgare (Isopoda, Crustacea) KXYO. K. — Lab. of Embr\'ol. and Exper. Morphol.. Zool. Inst.. Dept of Sci.. Kyoto Univ.. KYOTO. Japan a. Mechanism of mesodermal differentiation. Triturus pyrrhogaster fUro- dela) KATO. M. Ph.D. — Lab. of Embry-ol. and Exper. Morphol.. Zool. Inst.. Dept of Sci.. Kyoto Univ.. KYOTO. Japan a. Mechanism of pigment formation. Bombyx mori, Papilio xuthus hon- doensis. Philosamia cynthia ricini (Lepidoptera) KATO. M. B.Sc. — Biol. Inst.. Fac. of Sci.. Nagoya Univ.. Chigusa-Ku. NAGOYA. Japan a. The mechanism of Wolffian lens regeneration. (Amphibia) KATSH. S. B.A.. M.S.. Ph.D. — Dept of Embr%'ol.. Carnegie Inst, of Washington. Wolfe and Madison Sts. BALTIMORE 5. Md. U.S.A. a. The induction of aspermatogenesis by homologous organ extracts: a study in specific inhibition. (Mammalia) 58 KAWAKAMI. I. M.Sc. D.Sc. Prof. — Dect of Biol.. Kyushu Univ FU- KUOKA, Japan a. Organizing substances in tissues. (MammaliaJ b. Effects of chemicals on development. (Amphibia), Galltis spec.. Mas spec. (Amniota) c. Inductive substances in tissues. (Amphibia. MammaliaJ d. Special inductive capacities of cancer tissues. (Amphibia, Mammalia) KAWAKAMI. Mrs K. I. — Dept of Biol.. Fac. of Sci,. Kyushu Univ.. FU- KUOKL3.. Japan a. Mechanis" cf regeneration. Eisenia foetida (Oligochaeta) b. Effects of chemicals on development. Gallus spec. (Aves) c. Calcium metabolism and pearl-sac formation. Pinctada martensU (Mol- lusca) d. Mechanism of pearl-sac formation. Pinctada martensii (Mollasca) e. Spau-ning of germ-cells. Pinctada martensii (Mollusca) KAWAMURA. K. M.A. — Embn.-ol. Section, Dept of Biol.. Tokyo Metro- politan Unix., Setagaya-ku. TOKYO. Japan a. Comparative study of spermatocyte di\ision. (Orthoptera) KAWAMUR^A. T. B.Sc. D.Sc. Prof. — Zool. Lab.. Fac. of Sci.. Hiroshima Univ.. HIROSHIMA CITY. Japan KELLER. L. A.B. — Dect of AnaL, Med. School Uni\'. of Kan^= LAW- RENCE. Kansas. U.S.A. a. Histochemical study of the de\-eloping nervous s>^stem and its relation- ship to developing beha\iour patterns. DNA, RNA. add and alkaline phosphatase. Amby stoma maculatum (Urodela) (in collaboration with P. G. ROOFE and -\L-s E. L. WEXGER) KELLY. W. A. B.Sc. — Dept of Zool.. llni%-. CoU. of North Wales. BAN- GOR. Caernarvonshire. N. Wales a. Immunological relations of mother and young. (Mammalia) KEMP. N. E. Ph.D.. M.I.I.E. — Dep: of Zool.. Uni%-. of Michigan. ANN ARBOR. Mich.. U.S.A. a. Use cf radioactive isotopes as tracers in studies on the n:ech=:i;sm of s\-nthesis of yolk. Rana pipiens (Anura) h. Morphogenesis and metabolism of lar-vae after excision of 'zts.z'.. Ra-za pipiens. Ambgstoma punctatum (Amphibia) c. Electron microscopy of develc^ing oocytes with special reference to the development of yolk and egg membranes (comparatr^-e study). ( Evertebrata, Vertebrata) d. Changes in the cortical cytoplasm following fertilization. Fandulns hete- roclitus (Pisces) KIDO. T. — Zool. Inst.. Fac- cf Sci.. Univ. of Kanazavoa. K,^N.\Z.\WA. Japan a. Regeneration and morphogenesis. Planaria gor.ocephala ^Turbellaria) KIELB6WNA. Miss L M.Ph. — Zakiad Zool. Ocolnej. Inst. Zool.. Uniw. we Wrocla^iu. ul. Sienkie\^icza 21. WROCLAW. Poland a. The morphogenetical functions of the th>To:d gland and hypophysis. (Amphibia) KIENY. Mrs M. A. Dr es Sci. — Lab. d EmbrvoL exper. du ColL de France, et Lab. d'Embn.-ol. et de Texatol. exper. du C.N.R.S.. 1 1 Place Marcehn Berthelot, PARIS Ve. France 59 Kicny-Kon a. Recherches sur la morphogenese et Ics besoins nutritifs des os de carti- lage en culture in vitro. Gallus gallus (Aves) b. Problcmes relatifs aux causes de I'achondroplasie. Gallus gallus, var. Creeper (Aves) KIHLSTROM. J.-E. Fil.lic. — Inst, for Zoophysiol.. Uppsala Univ.. UPP- SALA. Sweden a. The physiology of ripening in spermatozoa. (Mammalia) KILLE R. A. B.Sc, Ph.D. — Dept of Zool.. Univ. of Edinburgh, West Mains Rd. EDINBURGH 9, Scotland a. Fertilization. Lampetra spec. (Cyclostomata) KINDAHL. Miss M. Fil.dr — Linnegatan 22. STOCKHOLM O, Sweden a. The development of the teeth. (Insectivora) KING. T. J. B.S., M.S.. Ph.D. — Lankcnau Hospital Research Inst, and Inst, fcr Cancer Research. Burholm Ave, Fox Chase. PHILADELPHIA 11. Pa. U.S.A. KING. T. S. M.B.. Ch.B. — Dept of Anat., Fac. of Med.. Univ. of Shef- field, SHEFFIELD, England vora) a. Histological studies of the cardiac conducting system. (Cetacea, Carni- KINOSITA, H. DrSci.. ProL — Zool. Inst.. Fac. of Soi.. Tokyo Univ.. TOKYO. Japan (no embryological work in progress) KIORTSIS. V. Dr es Sci. — Inst, de Zool. et d'Anat. Comp.. Univ. de Geneve. GENfiVE. Suisse a. Limb regeneration in the adult and larval animal. (Urodela) b. Influence of the nervous system in tail regeneration (spinal cord and spinal nerves). Salamandra salamandra (Urodela) c. Cumulative action of nerves and sexual hormones on the crest of the adult. Triturus cristatus (Urodela) KIRRMANN, J. M. Lic.es Sci. — Lab. d'Embryol. exper. du Coll. de France, et Lab. d'Embryol. et de Teratol. exper. du C.N.R.S., 11 Place Marcelin Berthelot, PARIS Ve, France a. L'influence protectrice de la cysteamine et de differentes substances chimiques contre Taction teratogene des rayons X. KISSEN. A. T. — Dept of Physiol., Ohio State Univ., COLUMBUS 10, Ohio, U.S.A. a. Embryology. Mustela spec. (Carnivora) KLAPPER, C. E. A.B.. Ph.D. — Univ. of Alabama, Med. Center, BIR- MINGHAM 5, Alabama. U.S.A. KLEISS, E. Dr Med.. Prof. — Dept of Anat., Fac. de Ci. Med.. Universidad de los Andes, MERIDA, Venezuela a. Development of the tongue and other organs of the mouth; teratology. Homo sapiens (Primates) KLOFT, W. Drrer.nat. — Inst, fiir Angewandte Zool. der Univ., Naturw. Fak., Rontgenring 10. WORZBURG. Deutschland KNIGHT. Miss P. F. A.B.. M.S. — Dept of Zool.. Univ. of Cahf.. LOS ANGELES 24. Cal., U.S.A. KNIGHT-JONES, E. W. B.Sc, D.Phil. — Dept of Zool., Univ. Coll. of Swansea, Singleton Park, SWANSEA, Glamorganshire, Wales a. Factors inducing metamorphosis. Hydroides norvegica (Polychaeta) KNOUFF, R. A. Ph.D., Prof. — Dept of Anat.. Ohio State Univ.. COLUMBUS 10, Ohio, U.S.A. 60 KOCHER. W. — Zool.-vergl. Anat. Inst., Naturw. Fak., Univ. Zurich. Kiinstlergasse 16, ZURICH 6, Schweiz KOECKE, H.-U. Dr Phil. — Zool. Inst, der Univ. Koln, Kerpenerstr. 13, KOLN-LINDENTHAL. Deutschland a. Krebsproblem als entwicklungsphysiologisches Problem. Mus spec. (Ro- dentia). Columba spec. (Aves) b. Probleme der Entwicklungsphysiologie. Columba spec. (Aves) c. Neuralleistenentwicklung und Pigmentierung. Anas spec. (Aves) KOJIMA-KUNO, M. M.A. — Marine Biol. Station, Nagoya Univ., Suga- shima-cho, TOBA, Mie-ken, Japan a. Physiological studies on the cleavage of eggs. Hemicentrotus pulchecri- mus, Pseudocenfrotus depressus (Echinoidea) KOLLROS. J. J. Ph.D., M.I.I.E., Prof. — Dept of Zool., State Univ. of Iowa, IOWA CITY, Iowa. U.S.A. a. Influence of peripheral and intracentral factors upon the growth of the midbrain. Rana spec, Bu[o spec, Pseudacris spec (Anura) h. Metamorphic effects of thyroxine in very low concentrations, and in higher concentrations applied locally. Rana spec, Bufo spec, Pseudacris spec, Ambystoma spec. (Amphibia) c. Regeneration of the midbrain in embryos and larvae. Rana spec, Bu[o spec, Pseudacris spec, Xenopus spec. (Anura) d. Development of grafts of isolated segments of the central nervous system. (Anura) e. Studies of mitosis in the developing central nervous system. (Amphibia) f. Influence of thyroxine analogues upon metamorphosis. Rana pipiens (Anura) g. Influence of the eyeball upon the development of the hds, cornea, nicti- tating membrane, palpebral fissure and tear glands. Rana pipiens, Pseu- dacris nigrita (Anura) KONIGSBERG, I. R. A.B., Ph.D. — Div. Chem. Embryol., Med. Center, Univ. of Colorado, 4200 East Ninth Ave, DENVER 20, Colo, U.S.A. a. Ontogeny of hormonal correlation of embryonic metabolism. Gallus domesticus (Aves) b. Effect of hormones on muscle development. Gallus domesticus (Aves) c Chemistry of muscle differentiation. Gallus domesticus (Aves) (in colla- boration with H. HERRMANN and A. J. SAMUELS) KONIGSBERG, Mrs U. ROTHFELS Ph.D. — Div. Chem. Embryol.. Med. Center, Univ. of Colorado, 4200 East Ninth Ave, DENVER 20. Colo, U.S.A. a. Analysis of muscle tissue grown in vitro. Homo sapiens (Primates) (in collaboration with H. HERRMANN) - b. Study of developmental disturbances related to nutritional deficiencies investigated by application of anti-vitamins and anti-amino acids to the intact egg and to explants (somites). (Aves) (in collaboration with H. HERRMANN) KONOPACKA, Mrs B. Dr, M.V.S.S., Prof. — Inst, of Histol. and Em- bryol., Veter. Fac, ul. Grochowska 272, WARSZAWA, Poland a. Histochemical studies on the differentiation of epithelial cells in the intestine. Sus domestica (Artiodactyla) b. Mitochondria in differentiating intestinal epithelial cells. Sus domestica (Artiodactyla) 61 Konopacka-Lan c. Histochemical studies on the developing mesonephros. Siis domestica (Artiodactyla) KOONO. J. Dr Med. — Anat. Dept. Fac. of Med.. Nagasaki Univ., NA- GASAKI, Japan a. Studies on lymph noduli of the intestine in Japanese fetuses (especially their surface area). Homo sapiens (Primates) b. Development of fatty tissue. Homo (Primates) KOSCIELSKI, B. M.Ph. — Zakiad Zool. Ogolnej, Inst. Zool.. Uniw. we Wroclawiu, ul. Sienkiewicza 21. WROCLAW, Poland a. Morphogenetical functions and histophysiology of the thyroid gland and hypophysis. Triturus spec. (Urodela) KRABBE, K. H. Dr Med. — Tornblad- Inst, for comp. Embryol., Biskops- gatan 7, LUND, Sweden (from Kommunehospitalet, COPENHAGEN. Denmark) a. Special development of preoptic recess in brain of embryo. Apteryx Mantelli (Ratitae, Aves) KRAINSKA, Mrs M. K. Mag. of Sci. — Inst, of Histol. and Embryol., Veter. Fac, ul. Grochowska 272, WARSZAWA, Poland KRASSOWSKI, T. Dr — Inst, of Histol. and Embryol., Acad, of Med., ul. Chalubinskiego 5, WARSZAWA, Poland KRAUSE, G. Dr phil.. M.I. I.E., Prof. — Zool. Inst, der Univ. Tiibingen. Holderlinstr. 12, TOBINGEN, Deutschland a. Experimentell erzeugtc Duplicitas cruciata. Tachycines asynamorus Adelung (Orthoptera) b. Analyse der Keimanlagenbildung. Tachycines asynamorus Adelung (Orthoptera) c. Embryonalentwicklung. Notonecta glauca L. (Hemipteroidea) KROPP, B. N. A.M., Ph.D., Prof. — Dept of Histol. and Embryol., Med. School, Queen's Univ., KINGSTON, Ont.. Canada KRUGELIS — MacRAE. Mrs E. J. Ph.D. — Dept of Zool.. Univ. of Cal.. BERKELEY 4. Cal.. U.S.A. KRUGER, A. W. M.D. — Veterans Administration Hospital. BROOKLYN 9. N.Y.. U.S.A. (no embryological work in progress) KRZYSTOFOWICZ. Miss A. B.Sc. — Zool. Dept of the Jagiellonian Univ., St Anne 6, KRAKOW. Poland a. Descriptive embryology. (Curculionidae, Coleoptera) b. Histochemical studies on development. Melasoma populi L. (Coleoptera) (in collaboration with Cz. JURA and Miss B. W^GLARSKA) KUHN, A. Dr phil.h.c, Dr rer.nat., Dr med.h.c, Prof. — Max Planck-Inst. fiir Biol., Spemannstr. 34. TUBINGEN, Deutschland a. Wundheilung und Regeneration. Ephestia spec, Ptychopoda spec (Lepidoptera) h. Entwicklung der Schuppen bei verschiedenen Mutanten und unter ex- perimentellen Bedingungen. Ephestia spec, Ptychopoda spec. (Lepidop- tera) c. Genwirkung und Phaenocopien bei der Ausbildung von Zeichnungs- mustern. Ephestia spec. Ptychopoda spec. (Lepidoptera) d. Chemische Genwirkungen auf Augenpigmente und Fliigelpigmente. Ephestia spec, Plodia spec, Ptychopoda spec. (Lepidoptera) e. Eiwachstum. (Cladocera, Crustacea) 62 KUHN. O. Dr rer.nat., Prof. — Zool. Inst, der Univ. Koln, Kerpenerstr. 13, KOLN-LINDENTHAL, Deutschland a. Hormonwirkungen in der Morphogenese. b. Entwicklungsphysiologie der Feder. (Aves) c. Wirkungsweise carcinogener und anderer Substanzen auf tierischc Gewebe. d. Regeneration und Wundheilung. KUME, M. M.A. — Zool. Lab., Fac. of Sci., Ochanomizu Univ., TOKYO, Japan KUnSKI, H. M.D. — Inst, of Histol. and Embryol., Acad, of Med., Naruto- wicza 60, LOD2, Poland a. Histochemistry of embryonal adrenal glands. (Mammalia) KURIKI. Y. — Biol. Inst., Fac. of Sci., Nagoya Univ., Chigusa-Ku, NA- GOYA, Japan a. Nuclei acid metabolism and cell multiplication during early development. (Echinodevmata, Amphibia. Aves) (in collaboration with R. OKAZAKI and Mrs T. OKAZAKI) KUTSKY, R. J. A.B.. M.A. — Dept of Zool., Univ. of Calif., BERKELEY 4. Gal., U.S.A. KUUSI, Miss T. K. Dr Phil., M.I.I.E. — Zool. Lab., Univ. of Helsinki, P. Rautatiekatu 13, HELSINKI, Finland a. The chemical nature of specific inductive substances (isolated from liver and kidney of the guinea-pig), especially the inductive effects of protein and nucleic acid fractions of dead tissues. Tritums spec. (Urodela) b. Study on the process of induction caused by the bone marrow of the guinea-pig, marked with radioactive glycine. Triturus spec. (Urodela) c. The chemical nature of specific inductive substances (bone marrow of the guinea-pig); role of the proteins and nucleic acids. Triturus spec. (Urodela) d. Study on the effect of permeability in induction. Triturus spec. (Uro- dela) e. Inductions caused by spleen of guinea-pig and extracts and centrifugal fractions from the bone marrow of guinea-pig. Triturus spec. (Urodela) LAHAYE, Mrs J. Dr es Sci. — Lab. de Biol. Anim., Centre d'Etudes Sup. Sci., Avenue Biarnay, RABAT, Maroc a. Regeneration des nageoires. (Teleostei) b. Endocrinologie et croissance. (Teleostei) LALLIER, R. A. Dr es Sci. — Inst, de Biol. Physico-Chimique, 13 Rue Pierre Curie, PARIS Ve, France a. Li et developpement embryonnaire, etude de la biochimie des embryons lithines. Rana fusca, Ambystoma mexicanum (Amphibia) b. Etude de I'induction. Triton taeniatus (Urodela) c. Etude de la determination embryonnaire. Paracentrotus lividus, Arbacia punctulata (Echinoidea), Rana fusca (Anura) d. Biochimie du determinisme sexuel. Bonellia viridis (Chaetopoda) e. Structure et proprietes de la mesoglee. (Ctenophora) LANDAUER. W. Ph.D., Prof. — Dept of Anim. Genet., Coll. of Agric, Univ. of Connecticut, Storrs Agric. Exper. Stat., STORRS, Conn., U.S.A. a. Developmental studies on various mutants, such as "duplicate", "creeper" etc. Gallus domesticus (Aves) 63 Landaucr-Lco b. A causal analysis of teratogenic action of insulin and other chemical compounds on developing embryos. Gallus domesticus (Aves) c. Hereditary (lethal) cyclocephaly and cyclopia. Gallus domesticus (Aves) d. The nature and significance of phenocopies. Gallus domesticus (Aves) e. The genetic role of sporadic variations. Gallus domesticus (Aves) LANGMAN. J. M.D., M.I. I.E. — Dept of Anat., McGill Univ., MON- TREAL, Quebec, Canada a. Immuno-embryological research into lens development. Gallus domesticus (Aves) b. Electrophoretic studies of yolk-sac proteins in relation to the protein configuration of the mother animal. (Rodentia) LANZAVECCHIA, G. Dr Biol. Sci. — 1st. di Zool. c Anat. Comp., Univ. di Milano, Via Celoria 10, MILANO, Italia a. Enzymes from eggs. (Aves) b. Electron microscopy of the first differentiation. (Amphibia, Aves) LARAMBERGUE. M. de Dr es Sci., Prof. — Lab. de Zool, Fac. des Sci., POITIERS. Vienne, France a. Recherches sur le developpement embryonnaire de I'appareil genital hermaphrodite. (Gastropoda) b. Differcnciation des gametes chez des formes hermaphrodites. (Gastro- poda) c. Croissance et embryologie. Achatina spec. (Gastropoda) LATIMER, H. B. Ph.D., Prof. (Emer.) — Dept of Anat., Med. School, Univ. of Kansas. LAWRENCE, Kansas. U.S.A. a. Study of two races, to determine the variation in relative weights of the various organs and parts in a large and in a small form. Oryctolagus cuniculus (Lagomorpha) b. Quantitative study of the parts of the postnatal heart. Oryctolagus cuniculus (Lagomorpha) LATTA. J. S. Ph.D. — Dept of Anat., Coll. of Med., Univ. of Nebraska, 42nd and Dewey Avenue, OMAHA 5, Nebraska, U.S.A. LAVARACK. J. O. M.B., B.S., Ph.D. — Anat. Dept, Univ. of Melbourne. CARLTON N. 3. Victoria, Australia a. Histochemical investigation of early neural, notochordal and related tissues. Gallus gallus (Aves) LAVEN. H. Drrer.nat. — Max Planck-Inst. fiir Biol., Spemannstr. 34, TUBINGEN, Deutschland a. Fertilization. Culex pipiens (Diptera) b. Normal and parthenogenetic development. Culex pipiens (Diptera) LEBLOND. C. P. M.D., Ph.D., Prof. — Dept of Anat., McGill Univ., MONTREAL, Quebec, Canada a. Development of the thyroid gland. (Vertehrata) b. The development of bones and teeth as shown on radioautographs with the help of radio-carbon-containing substances. (Vertebrata) LECAMP, M. — Lab. d'Evolution des Etres organises, Fac. des Sci. de Paris, 105 Boulevard Raspail, PARIS Vie, France LEFEBVRES— BOISSELOT, Mrs. J. Dr es Sci. — Lab. d'Embryol., Fac. de Med.. 45 Rue des Sts Peres. PARIS Vie. France a. Teratogenese par carence en vitamines B. Mus rattus (Rodentia) b. Developpement anormal de I'encephale par carence. Mus rattus (Ro- dentia) 64 c. Developpement du bee de lievre. Mas rattus (Rodentia) LEGHISSA, S. Ph.D. — Lab. di Istol. ed Embriol.. 1st. di Anat. Comp., Via Belmeloro 8, BOLOGNA (103). Italia a. Effects of antimitotics on the regeneration of peripheral nerves. (Uro- dela, Anura) (in collaboration with P. PASQUINI) LEGRAND. J.-J. Dr es Sci. — Lab. de Zoo!.. Fac. des Sci., POITIERS. Vienne, France a. Determination et differenciation du sexe, castrations, greffes, correla- tions humorales. Etude genetique de la monogenie. (Oniscoidea, Isopoda, Crustacea) b. Developpement des coaptations. (Oniscoidea, Isopoda: Decapoda.. Crustacea), (Insecta) c. Etude de la croissance. (Oniscoidea, Isopoda, Crustacea) d. Modalites de la reproduction. Platijarthrus schoblii (Oniscoidea, Isopoda, Crustacea) e. Analyse biometrique des populations de deux especes soeurs dans le nord et le midi de la France. Philoscia muscorum Scopoli, P. af finis Verhoeff (Oniscoidea, Isopoda, Crustacea) LEHMAN. H. E. M.A.. Ph.D. — Dept of Zool.. Univ. of North Carolina, CHAPEL HILL. N.C., U.S.A. LEHMANN, F. E. Dr Phil.. F.I. I.E.. Prof. — Zool. Inst, der Univ. Bern, Sahlistr. 8. BERN, Schweiz a. Allometrisches Wachstum. (Amphibia) (in Zusammenarbeit mit diver- sen Mitarbeitern) b. Schwanzregeneration. normal und chemisch beeinflusst. Xenopus spec. (Anura) (in Zusammenarbeit mit diversen Mitarbeitern) c. Elektronenmikroskopische Struktur von tierischen Eiern. Tubifex spec. (Oligochaeta), (Echinodermata) , (Ascidiae) d. Biochemie der Regeneration. (Amphibia) (in Zusammenarbeit mit diver- sen Mitarbeitern) fLELIfiVRE. A. Prof. — Lab. d'Embryol., Fac. de Med.. 45 Rue des Sts Peres, PARIS Vie. France (deceased) LEMEZ. L. MUDr — Dept of Anat.. Charles Univ.. U nemocnice 3, PRAHA II, Czechoslovakia a. Embryonal haematology. Life-span of erythrocytes. Mitotic time of primitive erythrocytes. Callus domesticus (Aves) b. Experimental analysis of the development of blood corpuscles. Callus domesticus (Aves) LENDER, Th. Dr es Sci. — Lab. d'Embryol. exper. du Coll. de France, et Lab. d'Embryol. et de Teratol. exper. du C.N.R.S., 11 Place Marcelin Berthelot. PARIS Ve. France a. Regeneration des yeux. Role et nature des organisines de la regeneration des yeux. Polycelis nigra (Turbellaria) b. Regeneration du cerveau. Les substances inhibitrices de la regeneration, emises par le cerveau. Polycelis nigra, Dugesia lugubris (Turbellaria) LEONE, V. M.D., M.I.I.E. — 1st. di Zool. e Anat. Comp., Univ. di Milano, Via Celoria 10, MILANO. Itaha a. Neoplastic formations. Triturus spec. (Urodela) b. Electron microscopy of the first differentiation. Rana spec. (Anura) 65 Lcp-Lop LEPORI. N. G. Prof. — 1st. di Zool. e Anat. comp. deH'Univ., Via A. Volta 4, PISA. Italia a. Development of the gonads. (Amphibia) LERMA. B. de Dr Sci. Nat.Fis.. Prof. — 1st. di Zool.. Univ. di Bari. BARI. Italia LEROY. P. J. M. Dr es Sci. — Lab. d'Histophysiol.. Coll. dc France, Place Marcelin Berthelot. PARIS Ve. France a. Dcveloppement et physiologic des surrenales. Gallus spec. Anas spec. (Arcs) LEUSSINK. }. A. B.Sc. — Hubrecht Lab.. Intern. Embryol. Inst.. Janskerk- hof 2. UTRECHT, Holland LEVAK. Miss B. M.Sc. — Inst, de Biol.. Fac. de Med.. Salata, ZAGREB. Yougoslavie a. Experimental studies on early development. 1. Intrauterine injections of isotonic solutions of LiCl. 2. Transplantation of the blastocyst in different transfer media (with LiCl). Rattus norvegicus albinus (Rodentia) (in collaboration with N. SKREB) LEVER, J. Dr Phil.. Prof. — Zool. Inst., Free Calvinistic Univ., Rapenbur- gerstr. 128, AMSTERDAM C, Holland (no embryological work in progress) LEVI. G. L. Dr. F.I. I.E. Prof. (Emer.) — Inst, of human Anat., Fac. of Med., Corso Massimo d'Azeglio 52. TORINO. Italy a. Recherches sur les transformations qui se produisent dans les organismes et dans les tissus cultives in vitro pendant I'accroissement. (Amniota) b. Recherches sur les caracteres de la structure et des proprietes biologiques dans les tissus cultives in vitro. (Amniota) LEVI-MONTALCINI. Miss R. M.D.. M.I. I.E. — Dept of Zool.. Washing- ton Univ., Lindell and Skinker Av.. ST LOUIS 5, Mo., U.S.A. LEWIS. W. H. Dr. F.I.I.E.. Prof. (Emer.) — Wistar Inst, of Anat. and Biol.. PHILADELPHIA 4. Pa. U.S.A. LIEDKE. Mrs. K. BEYER Ph.D. — Dept of Biochem.. Francis Delafield Hospital. Coll. of Physicians & Surgeons. NEW YORK 32, N.Y., U.S.A. a. Further studies with purine analogues in development, involving trans- plantation and explantation. Rana pipiens (Anura) b. Electronmicroscopic studies of embryonic tissues. Rana pipiens. Am- bystoma punctatum (Amphibia) LI6VRE. Miss Fr. Lic.es Sci.. M.A. — Lab. d'Embryol. exper. du Coll. de France, et Lab. d'Embryol. et de Teratol. exper. du C.N.R.S.. 11 Place Marcelin Berthelot. PARIS Ve. France a. Differenciation des cellules endocrines du pancreas chez I'embryon. et I'influence de I'hypophysectomie sur cette differenciation. Gallus gallus (Aves) tLILLIE. R. S. Ph.D., Sc.D. — Physiol. Lab., Univ. of Chicago, CHICAGO 37. 111., U.S.A. (deceased) LIMBORGH, J. van Med. Dr — Anat.-Embryol. Lab. der Rijks Univ.. Janskerkhof 3, UTRECHT, Holland a. Origin of the asymmetry of the gonads. Anas boschas (Aves) h. Sex differentiation. Anas boschas (Aves) 66 LINDAHL, P. E. Fil.Dr, F.I.I.E., Prof. — Inst, for Zoophysiol, Uppsala Univ.. UPPSALA, Sweden a. Large scale separation of macromeres, mesomeres and micromeres of the developing egg. (Echinoidea) b. The mechanism of agglutination of spermatozoa. (Mammalia) (in colla- boration with S. ROSS and N.-O. BODIN) c. The primary sex rate. (Mammalia) (in collaboration with Mrs G. SUN- DELL— THORSELL ) LINDBERG, N. O. H. Phil.Dr — Wenner-Grens Inst, for exper. Biol., Norrtullsgatan 16. STOCKHOLM Va., Sweden a. Biochemistry and physiology of mitochondria. (Echinoidea) LINDH. N. O. Fil.Lic. — Zoophysiol. Inst.. Univ. of Lund. LUND, Sweden LIOTTI. F. S. Dott. — 1st. di Biol, gen., Fac. di Med., S. Pietro, PERU- GIA. Italia a. Ossiforo di Spirito in embrioni a varie temperature. (Anuta) b. Rigenerazione. Triton spec. (Urodela) LIPSCHUTZ. A. M.D., Prof. — Instituto de Med. Exper., Av. Irarrazaval 849. SANTIAGO, Chile, S. America LISON, L. Prof. — Fac. de Med. de Ribeirao Preto, Univ. de Sao Paulo, SAO PAULO, Bresil LIU, C. N. B.S., Ph.D. — Dept of Anat.. School of Med.. Univ. of Penn- sylvania, PHILADELPHIA 4. Pa, U.S.A. LOBBECKE, E.-A. — Institut fur Entwicklungsphysiologie, Univ. zu Koln. Gyrhofstr. 17. KoLN-LINDENTHAL, Deutschland a. Segmentierung des Abdomen bei der Neubildung wahrend der Meta- morphose. Drosophila melanogaster (Diptera) h. Segmentierungs- und Determinationsvorgange der Beinentwicklung. Drosophila melanogaster (Diptera) LOEWENTHAL, Miss L. A. A.B., A.M., Ph.D. — Dept of Zool., Univ. of Michigan, ANN ARBOR, Mich., U.S.A. a. Histological and histochemical study on homozygous Creeper embryos. Gallus domesticus (Aves) LONG, W. N. — Dept of Embryol., Carnegie Inst, of Washington, Wolfe and Madison Sts, BALTIMORE 5, Md, U.S.A. a. Determinations of blood, amniotic and intervillous space pressures throughout pregnancy. Macaca mulatta (Primates) (in collaboration with Miss E. M. RAMSEY and G. W. CORNER Jr) LOOSLI, R. — Zool.-vergl. Anat. Inst., Naturw. Fak., Univ. Zurich, Kunst- lergasse 16, ZttRICH 6, Schweiz LOPASHOV. G. V. Dr Biol.Sci., F.I.I.E., Prof. — Inst, of Animal Morphol. of the Acad, of Sci. of the U.S.S.R., Bolshaja Kalushskaja 33, MOS- COW V-71. U.S.S.R. a. Complex analysis of conditions of embryonic development of the parts of the eye rudiment. Trituras taeniatus, T. vittatus, Ambystoma mexi- canum (Urodela), Rana arvalis, R. esculenta, R. ridibunda, Bufo viridis, Pelobates fuscus (Anura) b. Analysis of significance of intracellular components and of the compo- sition of the medium on the development of embryonic cells (ectoderm, neural plate, eye rudiment). Ambystoma mexicanum (Urodela), Rana arvalis, R. ridibunda etc. (Anura), Misgurnus fossilis (Teleostei) 67 Lopashov-Mac c. Analysis of sources and conditions of retina regeneration in tadpoles. Bu[o viridis. Rana arvalis (Anura) LOS, J. A. Med.Drs — Anat.-Ebryol. Sch. of the Univ. of Leyden, Fac. of Med.. Wasscnaarseweg. Boerhaavekwartier. LEIDEN, Holland a. Normal and abnormal development of the heart. Homo sapiens and other Animalia (in collaboration with J. DANKMEIJER) LOVELACE, Miss L. R. B.S.. M.S., Ph.D. — Dept of Biol., Univ. of South Carolina. COLUMBIA. S.C, U.S.A. L0VTRUP, S. Dr Phil. — Fac. of Med., Univ. of Gothenburg. 4: de Lang- gatan 7. GOTEBORG, Sweden a. Chemical differentiation during development at different temperatures. Enzymes and nucleic acids. Siredon mexicanum (Urodela), Rana tern- poraria (Anura) b. Metabolism during development at different temperatures. Siredon mexicanum (Urodela) c. Mechanism of determination of bilateral symmetry and of gastrulation. (Amphibia) LUCEY, E. C. A. B.Sc. — Inst, of Animal Genet., Univ. Dept of Genet., King's Buildings, West Mains Rd, EDINBURGH 9, Scotland a. Film of normal development. Oryctolagus cuniculus (Lagomorpha) (in collaboration with R. A. BEATTY) LODTKE, H. Dr, Prof. — Zool. Inst, der Univ., Katharinenstr. 20, FREI- BURG i. Brsg., Deutschland LUDWIG, D. A.B.. Ph.D. — Biol. Lab., Fordham Univ., NEW YORK 58, N.Y., U.S.A. a. Effects of substrates and inhibitors on oxygen consumption of homoge- nates during embryonic development. Tenebrio molitor, Popillia japonica (Coleoptera) (Coleoptera) b. Study of respiratory enzymes during development. Tenebrio molitor LUDWIG, K. S. M.D. — Anat. Inst., Pestalozzistr. 20, BASEL, Schweiz LUGLI, Miss L. Dr — 1st. di Zool. e Anat. comp.. Via Universita 4, MODENA. Italia a. Activity of sex hormones on the sex differentiation of gonads and Bid- der's organs. Bufo bulo (Anura) LtiSCHER, M. DrPhil., a.o. Prof. — Abt. f. Zoophysiol., Zool. Inst, der Univ. Bern, Sahlistr. 8, BERN, Schweiz a. Differentiation of castes in termites, especially the determination of sup- plementary reproductives in primitive termites. Kalotermes flavicollis (Fabr.) (Isoptera, Insecta) b. Descriptive and experimental study of the glands producing moulting and metamorphosis hormones. Zootermopsis nevadensis (Hagen) (Isop- tera, Insecta) LUTHER, W. Dr Phil., Prof. — Zool. Inst, der Technischen Hochschule, DARMSTADT, Deutschland a. Regeneration (limb, skin). (Urodela) b. Effects of ionizing radiations on regeneration. Various spp. (Amphibia), Rattus norvegicus. Mesocricetus auratus (Rodentia) LUTZ, H. Dr es Sci., M.I. I.E., Prof. — Lab. de Zool., 1 Avenue Vercinge- torix, CLERMONT-FERRAND, France a. Developpement du blastoderme pendant les premieres heures de I'incu- bation. Anas spec. (Aves) 68 b. La polyembryonie experimentale; I'orientation des embryons. (Aves) c. Polyembryonie experimentale. (Salmonidae, Teleostei) (en collaboration avec Mrs. Y. LUTZ— OSTERTAG) d. Formation de I'entoblaste. (Aves) e. Action des ultra-sons sur I'embryon et sur differents organes. Gallus spec. (Aves) (en collaboration avec Mrs Y. LUTZ-OSTERTAG) f. Culture in vitro du blastoderme. (Aves) (en collaboration avec Mrs Y. LUTZ— OSTERTAG) g. Developpement de la glande uro-pygienne. (Aves) LUTZ— OSTERTAG. Mrs. Y. Dr es Sci. — Lab. de Zool., 1 Avenue Ver- cingetorix, CLERMONT-FERRAND, France a. La genese de I'asymmetrie du tractus genital et la regression des canaux de Miiller par la methode d'explantations. Gallus spec. (Aves) h. Role des hormones dans la differenciation primaire du sexe, Gallus spec. (Aves) (en collaboration avec Et. WOLFFS c. Polyembryonie experimentale. (Salmonidae, Teleostei) (en collaboration avec H. LUTZ) d. Action des ultra-sons sur I'embryon et sur differents organes. Gallus spec. (Aves) (en collaboration avec H. LUTZ) e. Culture in vitro du blastoderme. (Aves) (en collaboration avec H. LUTZ) LYDECKEN, K. M.A.. B.M. — Anat. Inst.. Univ. of Helsinki. HELSINKI, Finland a. Development of the anterior pituitary and thyroid gland. Mus musculus (Rodentia) LYNE. A. G. B.Sc. — Div. of Animal Health and Production. C.S.I.R.O., Sheep Biol. Lab., Great Western Highway, (P.O. Box 144 Parramatta), PROSPECT. N.S.W., Australia a. Development of skin and hair. Trishosurus vulpecula. Petameles nasuta (Marsupialia) b. Structure and development of hair follicles and associated glands. Bos taurus, Ovis spec. (Mammalia) LYNN, W. G. A.B., Ph.D. — The Catholic Univ. of America, WASH- INGTON, D.C.. U.S.A. a. Role of the thyroid in direct development. Eleutherodactylus ricordi (Anura) b. Factors in degeneration of the pronephros. Rana pipiens (Anura) LYON, Miss M. F. Ph.D. — Radiobiol. Res. Unit., Atomic Energy Res. Establ.. HARWELL, Berkshire, England a. Developmental study of absence of otholiths-. Mus musculus (Rodentia) h. Developmental study of the zigzag mutant. Mus musculus (Rodentia) c. Developmental study of ear mutants. Mus musculus (Rodentia) MACFADYEN, A. M.A. — Dept of Zool., Univ. Coll. of Swansea, Sing- leton Park, SWANSEA, Glamorganshire, Wales a. Development with normal and subnormal yolk supplies. Hydroides nor- vegica (Polychaeta) MACMILLAN, E. W. Dr — Dept of Anat.. Univ. of Liverpool, LIVER- POOL, England a. The importance of the epididymis and its vascularization for spermato- genesis. (Mammalia) 69 Macmillan-Mat b. The rate of transport of spermatozoa through the ductus epididymidis. (Mammalia) c. The influence of testosterone propionate on the epididymis. (Mammalia; d. The reaction of the epididymis to vital dyes. (Mammalia) MAGGIO. Miss R. Ph.D. — 1st. di Anat. Comp., Via Archirafi 18. PA- LERMO. Italia a. Enzymatic activities of mitochondria of the egg. (Echinoidea) MAKING. S. Prof. — Dept of Zool.. Fac. of Sci.. Hokkaido Univ.. SAP- PORO. Japan a. DNA contents in treated and non-treated tumor cells. Rattus noruegicus (Rodentia) b. Chromosome analyses in tumor tissues, with special reference to the shift of chromosomes and the arisal of new types of tumors. Rattus norvegicus (Rodentia) MALAN. Miss M. E. D.Sc. — Zool. Inst.. Univ. of Stellenbosch. STEL- LENBOSCH, South Africa a. Gastrulation. Testudo pardalis (Chelonia) MANCUSO, V. Dr — 1st. di Zool.. Via Archirafi 18, PALERMO. Italia a. The distribution of enzymes and other substances in the germ during development. (Evertebrata) h. Ultrastructure of some blastomeres in mosaic eggs. (Evertebrata) MANELLI, E. Dr Nat.Sci. — 1st. di Anat. Comp., Via Belmeloro 8, BO- LOGNA (103), Italia a. Analysis of development of some proteins (antigen-reactions). (Am- phibia) h. Researches on development of blood cells in relation with circulation (explantation and transplantation). (Amphibia) c. Origin and development of pronephros and mesonephros (e.xplantation). (Amphibia) d. Effects of low temperature on early development. (Amphibia) (in col- laboration with P. PASQUINI) e. Researches on variations of seric proteins by means of electrophoresis. Amby stoma spec. (Urodela) MANGOLD. O. Dr. F.I.I.E. Prof. — Heiligenberg-Inst.. (17b), HEILI- GENBERG. Kreis Ueberlingen, Bodensee, Deutschland a. Einfluss ausserer Faktoren auf die Entwicklung. (Urodela) h. Untersuchungen zur kausalen Morphologic des Kopfes. (Urodela) c. Untersuchungen iiber den determinierenden Einfluss des Entoderms. (Urodela) MANHOFF. Jr., L. M.D. — Rob't B. Green Hosp., SAN ANTONIO 7. Te.x.. U.S.A. MANTON, S. M. F.R.S., M.A., Sc.D. — King's Coll.. Strand, LONDON W.C. 2. England a. Embryology. Peripatopsis spec. (Onychophora. Annelida) b. General embryology. Polydesmus spec. (Diplopoda) MARCHAND, J. M. M.Sc. Ph.D. — Division of Fisheries, Beach Road. Sea Point, CAPE TOWN, South Africa (no embryological work in progress) MARCONNET, R. — Lab. d'Histol., Dep. d'Embryol.. Fac. de Med.. 31 Rue Lionnois. NANCY (Meurthe & Moselle). France 70 a. Action teratogene de I'uree. (Amphibia) (en collaboration avec A. DOL- LANDER) MARIN, G. Dr — 1st. di Zool. e Anat. comp., Fac. di Sci., Via Loredan 10. PADOVA, Italia a. Early development and sex differentiation of gonads. Gallus spec. (Aves) MARIN— LEWIN. Mrs L. Lic.es Sci. — Lab. d'Embryol. exper. du Coll. de France, et Lab. d'Embryol. et de Teratol. exper. du C.N.R.S., 11 Place Marcelin Berthelot. PARIS Ve, France a. Etude du comportement du foie embryonnaire cultive in vitro. Gallus gallus (Aves) MARKERT. C. L. Ph.D.. M.I.I.E. — Dept of Biol., The Johns Hopkins Univ.. Charles and 34th Sts. BALTIMORE 18. Md., U.S.A. a. The role of genotype and embryological history in the utilization of specific substrates for melanogenesis. Mus musculus (Rodentia) b. Influence of cell population on melanoblast differentiation. Mus musculus (Rodentia) c. Changes in synthetic ability during cellular differentiation. Gallus do-' mesticus (Aves), Mus musculus (Rodentia) d. Ontogeny of enzymes. Gallus domesticus (Aves), Mus musculus (Ro- dentia) MARSLAND, D. A. B.Sc, M.S.. Ph.D. — Biol. Dept, Washington Square Coll. of Arts and Sci., New York Univ., Washington Square. NEW YORK 3, N.Y., U.S.A. a. Induction of premature cleavage furrows by centrifngation. Arbacia punctulata (Echinoidea) MARTIN, Miss B. A. M.A., Ph.D. — Dept of Biol., Brooklyn Coll., Bedford Ave and Ave H. BROOKLYN 10, N.Y., U.S.A. a. Cytology and embryology. (Insecta) MARTIN, B. F. M.D., B.Ch., B.Sc. — Dept of Anat., Fac. of Med., Univ. of Sheffield, SHEFFIELD, England a. Histochemical studies. (Mammalia) MARTINET, Mrs M. Dr es Sci. — Lab. d'Embryol.. Fac. de Med., 45 Rue des Sts Peres, PARIS Vie, France a. Infuence teratogene des intoxications. Mus rattus (Rodentia) h. Influence teratogene de I'hyperv'itaminose A. Mus rattus (Rodentia) MASUDA, H. B.Sc. — Dept of Biol.. Naniwa Univ.. Sakai. OSAKA, Japan MASUI, Y. — Biol. Lab.. Dept of Sci.. Konan Univ.. KOBE, Japan a. Influence of LiCl upon the inductive specificity of the organizer. Triturus spec, Hynobius spec, Rana spec, Bu[o spec (Amphibia) MATEJKA, M. Dr — Inst, of Histol. and Embryol., Fac of Med., Charles Univ., Karlovarska 48. PLZEN, Czechoslovakia a. The morphogenesis of the genital organs from the standpoint of evolu- tionary morphology. (Amniota, including Homo sapiens) MATHER, W. B. Ph.D. — Zool. Dept, Univ. of Queensland. George St, BRISBANE, Queensland, Australia (no embryological work in progress) MATSUMOTO, J. M.A. — Biol. Lab.. Keio Univ.. YOKOHAMA. Hiyoshi, Japan a. Correlation between pigment formation and fluorescent substances dur- ing post-embryonal stages. Carassius auratus (Teleostei) 71 Maw-Mic MAWATARI, Sh. D.Sc. — Res. Inst, for Nat. Resources, Hyakunin-cho, 400. Shinjuku, TOKYO, Japan MAY, R. M. Ph. D., Ores Sci., Dr en Med.. Prof. — Lab. de Biol. Anim., Pavilion Curie, Univ. de Paris, 12 Rue Cuvier. PARIS Ve, France a. Brephoplastic transplantation. Mas musculus (Rodentia) b. Tissue culture and embryonic transplantation. Gallus domesticus (Aves) MAYER. G. Prof. Dr — Lab. d'Histol. et d'Embryol., Fac. de Med., Univ. de Bordeaux, BORDEAUX, France MAZIA, D. Ph.D. — Dept of Zool., Univ. of California, BERKELEY 4, Cal., U.S.A. MAZZONI— DE CESARE, Mrs. I. Dr Nat. Sci. — 1st. di Anat. Comp., Via Belmeloro 8. BOLOGNA (103), Italia a. Action of antimitotics on early development. (Amphibia) (in collabora- tion with P. PASQUINI) McCAFFERTY, R. E. Ph.D. — Dept of Anat.. School of Med.. Univ. of Maryland, BALTIMORE 1, Md. U.S.A. McCALLION, D. J. B.A., M.A., Ph.D., Prof. — Dept of Zool., Univ. of Toronto, TORONTO, Ont.. Canada a. The development of neural differentiation tendencies in the neurectoderm of the chick embryo just in front of the primitive node with special emphasis upon their regional character. Gallus domesticus (Aves) McKAY. D. G. B.S., M.D. — Dept of Pathol.. Harvard Univ., Med. School, 25 Shattuck St, BOSTON 15, Mass.. U.S.A. — Boston Lying-in Hospital, 221 Longwood Ave, BOSTON 15. Mass. — Free Hospital for Women. 245 Pond Ave, BROOKLINE. Mass. a. Histochemical studies on developing embryos. Homo sapiens (Primates) (in collaboration with A. T. HERTIG and Miss E. C. ADAMS) b. Histochemical studies on abnormal trophoblast with special reference to hydatidiform mole and chorionepithelioma. Homo sapiens (Primates) (in collaboration with A. T. HERTIG, K. BENIRSCHKE. W. BAR- DAWIL and Miss E. C. ADAMS) McKEEHAN, M. S. M.S., Ph.D. — Dept of Anat.. School of Med., Univ. of Virginia. CHARLOTTESVILLE, Va, U.S.A. a. Problems of growth and differentiation as studied in the developing lens. Gallus domesticus (Aves) McLaren. Mrs A. M.A.. D.Phil. — Roy. Veterinary Coll., Royal College St, LONDON N.W. I, England a. Influence of pre-natal environment upon development, investigated by transfer of fertilized eggs. Mus musculus (Rodentia) (in collaboration with D. MICHIE) b. Induction of super-fecundity by hormone treatment. Mus musculus (Ro- dentia) (in collaboration with D. MICHIE) McMINN. R. M. H. M.B., Ch.B., Ph.D. — Dept of Anat.. Fac. of Med.. Univ. of Sheffield, SHEFFIELD, England a. Epithelial regeneration in various organs. (Mammalia) McMURRAY. Miss V. M. A.B.. M.S.. Ph.D. — Dept of developm. Biol., Rockefeller Inst, for Med. Research. 66th St and York Ave. NEW YORK 21, N.Y.. U.S.A. McNUTT, C. W. A.B., M.S., Ph.D. — Dept of Anat.. Med. Branch, Univ. of Texas, GALVESTON, Tex., U.S.A. (Rodentia) a. Analysis of morphological effects of the short ear gene. Mus musculus 72 b. A study of the dwarf gene in association with other genes. Mus musculus (Rodentia) MEDAWAR. P. B. M.A.. D.Phil., F.R.S., Prof. — Dept of Zool. and Comp. Anat.. Univ. Coll. London, Gower St, LONDON W.C. 1. England a. Development of capacity to respond to antigens. Gallus domesticus. Anas platyrhynchus (Aves), Mus musculus, Rattus rattus, Cavia parcel^ lus (Rodentia), Oryctolagus cuniculus (Lagomorpha) , Bos taums fAr- tiodactyla) MENDONgA, H. Prof. — Cadeira de Histol. e Embriol, Fac. de Medicina, Univ. do Recife, Caixa Postal N. 616, RECIFE, Brasil (no embryological work in progress) MENKES, B. Drmed.. Prof. — Academia Republicii Populare Romine, Baza de cercetari stiintifice Timisoara, Bdul Mihai Viteazul 24, TIMI- SOARA, Roumanie a. Embryonale Heterotransplantationen Me.'anogenese. Gallus domesticus (Aves) h. Regeneration im Zentralnervensystem. Gallus domesticus (Aves) c. Elektrophoretische Analyse der Entwicklungsprozesse. Gallus domes- ticus (Aves) d. Entwicklung der Reaktivitat beim Embryo. Gallus domesticus (Aves) MENSCHIK. Z. B.A., M.D., D.Sc, L.M.C.C. Prof. — Dept of Anat., School of Med., Georgetown Univ., 3900 Reservoir Road, N.W., WASHINGTON 7. D.C.. U.S.A. a. Dietary factors in development. Oryctolagus cuniculus (Lagomorpha) h. Vitamin E and unsaturated fatty acids in the development and main- tenance of connective tissue. Oryctolagus cuniculus (Lagomorpha) METTETAL, C. Dr es Sci. — Lab. de Biol. Anim., Centre d'Etudes Sup. Sci., Avenue Biarnay, RABAT, Maroc a. La regeneration des membres, plus specialement la determination des parties du membre a I'interieur du bourgeon de regeneration. (Urodela) METZ, C. B. Ph.D., M.I.I.E. — Dept of Zool., Florida State Univ.. TAL- LAHASSEE, Florida, U.S.A. MEURLING, P. B. fil.mag. — Embryol. Dept. Zool. Inst, of the Univ. of Lund, LUND, Sweden a. The development of the pituitary. (Elasmobranchia) MEYER. D. B. Dr — Dept of Anat., Coll. of Med., Wayne State Univ.. DETROIT 7. Mich.. U.S.A. a. Morphogenesis and developmental histochemistry of embryonic eye. Gallus domesticus (Aves) (in collaboration with R. O'RAHILLY) MIALE. Miss I. A.B.. Ph.D. — Section Devel. and Regen., Lab. of Neuro- anat. Sci.. NINDB, Nat. Inst, of Health. BETHESDA. Md. U.S.A. a. Histochemistry of brain in development. MICHAEL, M. I. B.Sc, M.Sc, Ph.D. — Dept of Zool., Alexandria Univ., Moharram Bey, ALEXANDRIA, Egypt a. The development of the nasal capsules. Bufo regularis (Anura) (in col- laboration with S. N. SEDRA) b. The structure of the hyobranchial apparatus of the tadpoles. Bufo regu- laris (Anura) (in collaboration with S. N. SEDRA) c. The development of the columella auris. Bufo regularis (Anura) (in col- laboration with S. N. SEDRA) 73 Mic-Moo MICHIE, D. M.A., D.Phil. — Roy. Veterinary Coll.. Royal College St, LONDON N.W. 1. England a. Influence of pre-natal environment upon development, investigated by transfer of fertilized eggs. Mus musculus (Rodentia) (in collaboration with Mrs A. McLaren ) b. Induction of super-fecundity by hormone treatment. Mus musculus (Ro- dentia) (in collaboration with Mrs A. McLAREN) MICHON, J. Dres Sci. — Lab. de Zool., Fac. des Sci.. POITIERS. Vienne, France (no embryological work in progress) MIFUNE. S. M.Sc. — Dept of Biol.. Fac. of Sci.. Kyushu Univ., FUKUO- KA, Japan a. Inductive action of fresh mouse tissues and the modification of it by various methods. (Amphibia, Mammalia) b. Nature of protein responsible for induction. (Amphibia. Mammalia) MILAIRE, J. M.D. — Lab. d'Anat. et d'Embryol., Fac. de Med. de I'Univ., 97 Rue aux Laines, BRUXELLES, Belgique ' a. Cytochemistry of limb buds. (Vertebrata) MILIN, R. Prof. — Inst. d'Histol. et d'Embryol., Fac. de Med.. SARA- JEVO, Yougoslavie MILLARD— BOKENHAM. Mrs N. A. H. Ph.D. — Dept of Zool., Univ. of Cape Town, Rondebosch, CAPE TOWN, South Africa (no embryological work in progress) MILLER. J. A., Jr. A.B.. Ph.D. — Dept of Anat., Emory Univ. ATLANTA. Ga., U.S.A. MILLER. J. R. B.Sc, M.Sc. — Dept of Genetics, McGill Univ.. MON- TREAL, Quebec, Canada a. Effects of maternal fasting on embryonic development in various strains. Mus musculus (Rodentia) MINA. E. Y. M.D. — Dept of Anat., Fac. of Med., ALEXANDRIA, Egypt a. A study of the competence of the prechordal part of the neural plate (or tube) for neural crest formation under conditions of explantation at different stages of development. (Amphibia) h. Regeneration of the optic vesicle. (Amphibia) MINAMORI, S. B.Sc. — Zool. Lab., Fac. of Sc, Hiroshima Univ., HIRO- SHIMA CITY, Japan MINGANTI, A. Dr. M.I.I.E. — 1st. di Zool.. Via Archirafi 18. PALER- MO. Italia a. Development and cytology of hybrids. (Ascidiae, Urochordata) h. Chemical and physiological investigations on the jelly. (Amphibia) c. Respiratory systems in eggs and embryos. (Evertebrata) MINTZ, Miss B. A.B., M.S.. Ph.D. — Whitman Lab.. Univ. of Chicago, 5700 S. Ingleside. CHICAGO 37. 111.. U.S.A. a. Origin, migration and development of germ cells in normal, mutant and irradiated embryos. Gallus domesticus (Aves), Mus musculus (Roden- tia) b. Developmental interactions between normal and mutant cells. Gallus domesticus (Aves), Mus musculus (Rodentia) MIROLLI, M. — 1st. Italiano di Idrobiologia, PALLANZA, Italia a. Study of the oocytes. Dugesia lugubris (Turbellaria) 74 MITCHISON. J. M. M.A., Ph.D. — Dept of Zool.. Univ. of Edinburgh. West Mains Rd. EDINBURGH 9. Scotland a. Growth of single cells. Schizosaccharomyces pombe (Saccharomycetes) MITCHISON. N. A. M.A., D.Phil. — Dept of Zool.. Univ. of Edinburgh. West Mains Rd, EDINBURGH 9. Scotland a. Transplantation into chicken eggs of turkey haemopoietic and lymphoid elements. Gallus gallus. Meleagris gallipavo (Galliformes, Aves) MITRA, S. M.B.. B.S. — Dept of Zool., Presidency Coll., College St, CALCUTTA 12, India a. Cellular factors in kidney development. Gallus gallus (Aves) MIYAMORI-YAMAMOTO, Mrs H. M.Sc. — Lab. Exper. Embryol.. Inst. of Polytechn., Osaka City Univ., Minami-Ogimati, Kita-ku, OSAKA. Japan MOFFETT, Jr, B.C. A.B. (Zool.), Ph.D. (Anat.) — Dept of Anat., Schools of Med. and Dent., Univ. of Alabama Med. Center, 620 South 20th St. BIRMINGHAM 5, Alabama. U.S.A. a. Embryology of the temporomandibular joint. Rattus norvegicus (Roden- tia). Homo sapiens (Primates) b. Embryological development of synovial cavities. Rattus norvegicus MOGHE, M. A. Dr — Zool. Dept, Univ. of Poona, POONA, India MOHSEN, Th. DrV. — Lab. de Zool. et d'Embryol. exper., Inst, de Zool. et de Biol, gener., 12 Rue de I'Universite. STRASBOURG. France a. Morphogenese des gonades et du tractus genital. (Selachii, Teleostei) (en collaboration avec J. H. VIVIEN et J. J. THIEBOLD) MOLL, J. DrMed. — Anat.-Embryol. Lab. der Rijks Univ., Oostersingel 69, GRONINGEN, Holland (no embryological work in progress) MOMENT, G. B. A.B.. Ph.D. — Goucher College, BALTIMORE 4, Md. U.S.A. a. Relationship of method of healing and of the nervous system including neurosecretory tissue to posterior regeneration. Eisenia foetida (Oligo- chaeta) b. Influence of mass of tissue on growth. Ambystoma punctatum (Urode- la) c. Influence of radiation on amount of regeneration. Eisenia foetida (Oligo- chaeta) MONNE, L. Phil. Dr. — Statens Veterinarmedic. Anstalt, Dept of Para- sitol., STOCKHOLM 50, Sweden a. Life cycles and developmental physiology of parasitic worms. (Nema- toda) MONROY, a. M.D., M.I.I.E., Prof. — 1st. di Anat. Comp., Univ. di Palermo. Via Archirafi 18, PALERMO, Italia a. Studies on the mitochondria of the egg during early development. Paracentrotus lividus (Echinoidea) MOOG. Miss F. Ph.D., M.I.I.E., Prof. — Dept of Zool.. Washington Univ., Lindell and Skinker Av.. ST LOUIS 5, Mo., U.S.A. a. Development of enzyme systems in the embryo. Gallus domesticus (Aves), (Mammalia) h. Role of the pituitary-adrenal axis in fetal and juvenile development. (Aves, Mammalia) 75 Moo-Mul MOOKERJEE. S. M.Sc. Ph.D.. Prof. — Dept of Zool., Presidency Coll., College St. CALCUTTA 12. India a. Effects of chemical transport in morphogenesis. Amoeba spec. (Protozoa) (in collaboration with B. HAJRA, L. WAIDYASEKARA and Miss M. G. ALAMELU) b. Cell transplantation and isolation. Hydra spec. (Coelenterata) (in col- laboration with S. SANYAL. S. N. NAGARAJAN and A. SINHA) c. Physiology of cell-contact. (Porifera) (in collaboration with B. GAN- GULY and Miss M. CHOWDHURY) d. Cellular factors in morphogenesis. Gallus gallus (Aves). (Amphibia) (in collaboration with S. ADHIKARI. K. BALASUBRAMANIAM. Miss B. NURJAHAN and Miss A. BOSE) MOORE. A. R. Ph.D.. Prof. — Hopkins Marine Station, PACIFIC GROVE, Cal, U.S.A. a. On the structure of the pluteus. Strongylocentrotus purpuratus (Echi- noidea) h. Hybridization. (Centroidea, Echinoidea) c. Teratology of plutei. (Centroidea, Echinoidea) MOORE, Mrs B. CLARK A.B., A.M.. Ph.D. — Dept of Zool., Columbia Univ., Broadway and 116th St, NEW YORK 27, N.Y., U.S.A. a. Further studies of nucleo-proteins in development. Photometric analysis of nuclear proteins in lethal diploid and androgenetic hybrid embryos. Rana pipiens, Rana sylvatica (Anura) b. A comparison of the DNA content per nucleus in different species. (Anura) MOORE. J. A. A.B., M.A.. Ph.D.. M.I.I.E., Prof. — Dept of Zool.. Colum- bia Univ., Broadway and 116th St, NEW YORK 27, N.Y., U.S.A. a. Transplantation of nuclei. (Anura) b. Embryology. Australian spp. (Anura) c. Gastrula ectoderm competence and dorsal lip potency in hybrid embryos tested by xenoplastic and heteroplastic transplantations to diploid hosts. Rana pipiens 9 X Rana clamitans $ (Anura) MORGAN, Miss J. A. B.Sc. — Dept of Zool., Univ. of New England, ARMIDALE, N.S.W., Australia a. Regeneration and metamorphosis of cerci. Blattella germanica L. (Dictyoptera, Insecta) (in collaboration with A. STOCK and A. F. O'FARRELL) MORI, H. M. A., Dr Agri., Prof. — Biol. Lab.. Keio Univ.. YOKOHAMA, Hiyoshi, Japan a. Insecticide action on eggs, larvae and adults. (Insecta) MORI, Y. M.A.. Prof. — Biol. Lab., Keio Univ., YOKOHAMA. Hiyoshi. Japan a. On the cause of disappearance of cutaneous melanophores of young animals. Carassius auratus (Teleostei) b. Morphological and chemical studies of pigment formation in various species. (Pisces) MORICARD, R. Dr en Med., Dr es Sci. — Lab. d'Hormonol. et Cytol. Exper., Ecole pratique des Hautcs Etudes, Hopital Broca, 111, Rue L. M. Nordmann, PARIS XIII, France 76 a. Etude de la meiose, de la fecondation, de la migration dc I'oeuf dans les voix genitales. Oryctolagus cuniculus (Lagomorpha) b. Etude de la fecondation, de la migration de I'oeuf dans la trompe de Fallope, a I'aide du 35S utilise sous forme de 35S04Na2 ou de cystine. Oryctolagus cuniculus (Lagomorpha) (en collaboration avec Miss M. M. C. S. GOTHIE) c. Etude de la fecondation in vitro; realisation d'un film sur la fecon- dation. Oryctolagus cuniculus (Lagomorpha) d. Etude des secretions cervicales, uterines et tubaires, en rapport avec les phenomenes de I'ascension spermatique, de la fecondation, de la segmentation, et de la nidation. Oryctolagus cuniculus (Lagomorpha) (en collaboration avec Miss M. M. C. S. GOTHlE et J. BELAISCH) e. Decoloration du dichlorophenol mdophenol (DPIP) par I'ovocytc. Etude par micro-injection quantitative. Mas musculus (Rodentia) (en collaboration avec Miss M. M. C. S. GOTHIfi et O. BAIOCCHI) MORRIS. I. G. B.Sc, Ph.D. — Agr. Res. Council Unit of Embryol., Dept of Zool., Univ. Coll. of North Wales, BANGOR, Caernarvonshire, N. Wales a. Immunological relations of mother and young. (Mammalia) MOSSMAN, H. W. B.S., M.S., Ph.D., M.I.I.E., Prof. — , Dept of Anat., Bardeen Med. Labs, Univ. of Wisconsin, MADISON 6, Wis., U.S.A. a. Comparative morphology of the fetal membranes and reproductive tracts. (Mammalia) MOSZKOWSKA. A. Dr es Sci. — Lab. d'Histophysiol., Coll. de France. Place Marcelin Berthelot. PARIS Ve. France a. Culture d'organes embryonnaires (gonades, hypophyse. epiphyse). (Aves) MOTOMURA, I. Dr Sc, ProL — Lab. of Embryol., Inst, of Biol., Tohoku (Imperial) Univ., SENDAI. Japan MOURSl A. A. B.Sc, M.Sc. — Dept of Zool.. Alexandria Univ.. Mohar- ram Bey. ALEXANDRIA, Egypt a. The ontogenesis of the vertebral column. Bufo regularis (Anura) (in col- laboration with S. N. SEDRA) MUCHMORE, W. B. Ph.D. — Dept of Biol., Coll. of Arts and Sci., Univ. of Rochester, ROCHESTER 20, N.Y., U.S.A. a. Early differentiation of trunk mesoderm. Ambystoma maculatum (UrO" dela) h. Immunochemical study of muscle development. Ambystoma spec. (Uro- dela) MUIR, A. R. M.B., Ch.B., M.D. — Dept of Anat., Univ. of Edinburgh. Univ. New Buildings. Tevist Row. EDINBURGH 8. Scotland a. Development of myocardium with special reference to the conducting tissue. Rattus domesticus (Rodentia) b. Electron microscope studies of differentiating mesoderm with special reference to muscular and haemopoetic tissues. Rattus domesticus (Rodentia) MULLIGAN, W. J. M.D. — Free Hospital for Women. 245 Pond Ave, BROOKLINE. Mass.. U.S.A. a. Histochemical observations on early fertilized ova of less than 14 days age. Homo sapiens (Primates) (in collaboration with A. T. HERTIG, J. ROCK and Miss E. C. ADAMS) 77 Mul-Nie MULNARD, J. O. M.D.. M.I. I.E. — Lab. d'Anat. ct clEmbryol., Fac. de Med. de I'Univ.. 97 Rue aux Laines, BRUXELLES. Belgique a. Appearance of enzymes, mainly alcaline phosphatase, in the development. (Rodentia) h. Metachromasia in vivo in the developing egg, and cytochemical analysis of cytoplasmic granulations in relation to metachromasia. Chae- toptenis spec. (Polychaeta) , Arbacia spec. (Echinoicica) MUN, A. M. — Dept of Zool., Indiana Univ., BLOOMINGTON. Ind.. U.S.A. MURAKAMI, U. M.D., D.Med. Sci. — Res. Inst, of Environmental Med., Nagoya Univ., Furo-cho, Chikusa-ku, NAGOYA, Japan a. Study on the manifestation of common pathological changes observed in early stages of developing malformations of the central nervous system. Mas musculus (Rodentia) MURATORI, G. Dr Med., o.Prof. — 1st. Anat., Univ. di Ferrara, Via Fossato di Mortara 66, FERRARA, Italia a. Histochemical characteristics of the development of the joints in the nor- mal embryo and in organ-cultures. Gallus domesticus (Aves) b. Histochemical characteristics of the development of the arteries in the normal embryo and in organ-cultures. Gallus domesticus (Aves) MURRAY, P. D. F. M.A.. D.Sc. F.I.I. E. ^rof. — Dept of Zool., Univ. of Sydney, SYDNEY, N.S.W., Australi.. NACE, G. W. A.B., M.A., Ph.D. — Dept of Zool., Univ. of Mich., ANN ARBOR, Mich., U.S.A. a. Serological and electrophoretic study of proteins of the embryo. Rana pipiens (Anura) b. Study of development in the presence of antibodies against embryonic proteins. Rana pipiens (Anura) c. Immuno-histologic analysis of development using fluorescent antibody. Rana pipiens (Anura) NAGARAJAN, S. N. M.Sc. — Dept of Zool., Presidency Coll.. College St, CALCUTTA 12, India a. Regeneration experiments. Hydra spec. (Coelenterata) b. Cell transplantation and isolation. Hydra spec. (Coelenterata) (in colla- boration with S. MOOKERJEE) NAKAMURA, O. D.Sc, Prof. — Lab. of Morphol., Osaka Lib. Arts Univ., IKEDA, Osaka-Pref., Japan a. Map of presumptive regions and formative movements. Triturus spec, Hynobius spec, Rana spec (Amphibia) h. Experimental analysis of development of tail. Triturus spec. (Amphibia) c Formation of digestive tract. Rana spec, Triturus spec. (Amphibia) d. Interaction of germ layers in differentiation and shaping. Triturus spec, Rana spec. (Amphibia) NAKANE, T. M.Sc. — Biol. Lab., Saikyo Univ., Shimogamo, KYOTO, Japan a. Embryology. (Coleoptera) NAKANO, E. M.A.. Dr Sci. — Biol. Inst., Fac. of Sci.. Nagoya Univ., Chigusa-Ku, NAGOYA, Japan a. Physiological studies on fertilization and development. Paracentrotus lividus, Hemicentrotus pulcherrimus (Echinoidea) , Oryzias latipes (Teleostei) 78 b. Metabolic analysis of early development. Oryzias latipes (Teleostei) (in collaboration with T. HISHIDA) NAKAYAMA. T. M.B.. M.D. — Anat. Inst., Med. Fac. Nihon Univ., No. 724, Ooyaguchi-machi, Itabashi-ku, TOKYO, Japan NAPP, M. B.A., M.Sc. — Long Island Univ.. 385 Flatbush Avenue Exten- sion, BROOKLYN, N.Y., U.S.A. NAYLOR, E. B.Sc, Ph.D. — Dept of Zool., Univ. Coll. of Swansea, Singleton Park, SWANSEA, Glamorganshire, Wales a. Determination of asymmetry in development and regeneration of the operculum. Hydroides norvegica (Polychaeta) NEEDHAM, A. E. M.A., D.Sc. — Dept of Zool. and Comp. Anat., The Univ. Museum, OXFORD, England a. Nitrogen excretion during wound-healing and regeneration. Lumbricus terrestris. Eisenia [oetida, Allolobophora caliginosa (Oligochaeta) NEEDHAM, J. Dr, F.I. I.E., Prof. — Gonville and Caius Coll., CAM- BRIDGE. England NEF, W. — Abt. f. Genet.. Zool. Inst, der Univ. Bern, Sahhstr. 8, BERN, Schweiz a. Entwicklungsphysiologie einer Fliigel-Borsten-Mutante. Drosophila spec. (Diptera) (in Zusammenarbeit mit S. ROSIN) NEWBY, W. W. Ph.D. (Stanford Univ.. 1939) — Dept of Genetics and Cytology. Div. of Biol., Univ. of Utah. SALT LAKE CITY, Utah, U.S.A. NEWTH. D. R. B.Sc. Ph.D.. M.I. I.E. — Dept of Zool. and Comp. Anat., Univ. Coll. London. Gower St. LONDON W.C. 1. England a. Regeneration of defective organs. (Amphibia) NEWTON. B. L. B.A.. M.D.C.M. — Dept of Pathol.. Coll. of Med.. Baylor Univ.. 1200 M.D. Anderson Blvd. Texas Med. Center, HOUSTON 5, Tex., U.S.A. (no embryological work in progress) NICHOLAS, J. S. Ph.D., F.I.I.E.. Prof. — Osborn Zool. Lab.. Yale Univ., NEW HAVEN 11, Conn., U.S.A. a. Studies on the egg. Mus norvegicus (Rodentia) h. Determination times of tissues and organs. Mus norvegicus (Rodentia) c. Factors underlying embryonic form. d. Development of nucleic acids in embryos. (Amphibia), Mus norvegicus (Rodentia) tia) e. Development of acidphosphatase. (Amphibia), Mus norvegicus (Roden- f. Centrifugation and transplantation of eggs. Mus norvegicus (Rodentia) g. Culture of eggs and embryos. Mus norvegicus (Rodentia) h. Heteroplastic grafting. Gallus gallus (Aves) (host), Mus norvegicus (Rodentia) (donor) j. Coelomic studies of differentiation. Mus norvegicus (Rodentia) k. Study of the forces engaged in cleavage. NICOLA. Miss M. DE Dr Sci. — Centro di Studio per la Biol, del C.N.R.. Stazione Zool. NAPOLI. Italia NIESSING. K. Dr med., o.Prof. — Anat. Inst, der Univ., Robert Kochstr. 6, MARBURG/Lahn. Deutschland (no embryological work in progress) NIEUWKOOP. P. D. Phil.Dr. M.I.I.E. — Hubrecht Lab., Intern. Embryol. Inst., Janskerkhof 2, UTRECHT, Holland 79 Nieuwkoop -Oka a. Quantitative analysis of the competence of ectoderm during normal development with fold implantation technique. Ambystoma mexicanum (Ihodcla) . u u b. Quantitative analysis of propagation of inductive action through com- petent ectoderm. Ambystoma mexicanum (Urodela) c. Analysis of neural induction under normal and experimental conditions with time lapse photography. (Amphibia) NIIZIMA, M. M.D.. Ph.D. — Dept of Anat., Tokyo Med. and Dent. Univ.. Yushima 3. Bunkyo-ku, TOKYO. Japan a. Tissue culture studies on the development of dental tissues. Homo sapiens, Felis domestica (Mammalia) h. Tissue culture studies on metamorphosis. (Amphibia) NIJENf-IUIS, E. D. M.Sc. — Zool. Lab. der Rijks Univ., Janskerkhof 3. UTRECHT. Holland a. Analysis of the phase specificity in the sensitivity of the egg to Li-ions. Limnaea stagnalis (Gastropoda) b. Autoradiographic localization of kations in eggs. Limnaea stagnalis (Gastropoda) c. Time course of mitotic processes during early cleavage stages. Limnaea stagnalis (Gastropoda) NISHIltsUTSUJI— UWO. Mrs J. — Lab. of Embryol. and Exper. Mor- phol., Zool. Inst., Dept of Sci., Kyoto Univ.. KYOTO. Japan a. Hormonal mechanism of metamorphosis. Bombyx mod. Luehdorfia japo- nica. Philosamia cynthia ricini (Lepidoptera) (in collaboration with M. ICHIKAWA) NIU M. C. Dr, M.LLE. — Rockefeller Inst, for Med. Research, 66th St and York Ave. NEW YORK 21, N.Y., U.S.A. NOBILI. R. — 1st. di Zool. e Anat. comp. dell'Univ., Via A. Volta 4. PISA. Italia a. Reproduction. (Tridadidea, Turbellaria) NORBERG, O. V. O.Dr. Prof. — Dept of Histol.. Karolinska Inst., Sol- navagen 1, STOCKHOLM 60, Sweden a. The postnatal evolution of the lower jaw. Homo sapiens (Primates) NORMAN, C. Ph.D. — Dept of Anat., School of Med.. Univ. of West Virginia, MORGANTOWN, W.Va, U.S.A. a. The intracellular distribution of sulfhydryl groups in embryonic, adult and tumorous tissues. Rana pipiens (Anura) NOWAKOWNA. Miss J. M.Ph. — Zakiad Zool. Ogolnej. Inst. Zool.. Uniw. we Wroctawiu. ul. Sienkiewicza 21. WROCLAW, Poland a. The morphogenetical functions of the thyroid gland and hypophysis. (Amphibia, Reptilia, Aves) b. Pigmentation and the endocrine glands. (Amphibia) NOESCH, H. D.Sc. Prof. — Zool. Anstalt der Univ., Rheinsprung 9, BASEL. Schweiz a. Einfluss des Nervensystems auf die Entwicklung anderer Organe. Telea polyphemus (Saturniidae, Lepidoptera) b. Entwicklung der imaginalen Muskeln. (Neuroptera, Lepidoptera) c. Entwicklung des Nervensystems. (Insecta) NUMANOI, H. Ph.D. — Biol. Inst., Coll. of Gener. Education, Univ. of Tokyo, TOKYO, Japan 80 a. Biochemical study of fertilization substances, with special reference to the physiology of polyphenol sulfate and choline derivatives. (Echinoidea) NURJAHAN, Miss Begum B.Sc.(Hons) — Dept of Zool., Presidency Coll., College St, CALCUTTA 12, India a. Cellular factors in morphogenesis. Gallus gallus (Aves) (in collaboration wit S. MOOKERJEE) NYHOLM. K. G. Fil.Dr — Zool. Inst., Uppsala Univ., UPPSALA, Sweden a. Study of the development. (Echinoderidae, Aschelminthes) b. Study of the life-history. (Rhizopoda monothalamia) OBIKA, M. M.A. — Biol. Lab., Keio Univ., YOKOHAMA, Hiyoshi, Japan a. Correlation between pigment formation and pterin derivatives during development. (Amphibia) O'BRIEN, B. R. A. B.Sc, Ph.D. — Dept of Histol. and Embryol., Univ. of Syndey, SYDNEY, N.S.W.. Australia O'BRIEN, J. P. Ph.D. — Dept of Biol., Marquette Univ., 1217 West Wis- consin Ave, MILWAUKEE 3. Wis.. U.S.A. a. Regression of larval and adult limb and tail following exposure to X-rays or denervation. Triturus viridescens, Ambystoma punctatum (Urodela) b. Spindle-cell sarcoma of adult animals. Triturus viridescens, Ambystoma punctatum (Urodela) c. Radiosensitivity in relation to temperature prevailing during exposure. Rana catesbiana, Rana pipiens, Triturus viridescens (Amphibia), Mus rattus, Lepus americanus (Rodentia) d. Irradiation of solely the circulating blood. (Vertebrata) O'CONNOR. R. J. M.D., D.T.M. — Research Labs, Westminster Med. School, Udall St, Vincent Square, LONDON S.W. 1, England a. Growth and regeneration of alimentary mucosa. (Mammalia) b. Culture of embryonic cells: their metabolic requirements compared with cancer cells. (Aves, Mammalia) ODOR, Miss D. L. M.S.. Ph.D. — School of Med., Univ. of Washington, SEATTLE 5, Wash., U.S.A. O'FARRELL, A. F. B.Sc, ARCS — Dept of Zool., Univ. of New England, ARMIDALE, N.S.W., Australia a. Regeneration and the endocrine system. Blattella germanica (Dictyop- tera. Insecta) (in collaboration with A. STOCK and Miss J. MORGAN) OIKAWA. Miss I. B.Sc. — Fac. of Education, Kochi Univ.. KOCHI, Japan OKA. H. Ph.D. (Tokyo), Prof. — Inst, of Zool.. Univ. of Education, Otsu- ka-Kubomachi 24, Bunkyoku, TOKYO. Japan OKADA, E. — Inst, of Animal Genet., Univ. Dept of Genet., King's Build- ings, West Mains Rd. EDINBURGH 9. Scotland a. Electron microscope studies of gene action (in collaboration with C. H. WADDINGTON and Miss M. M. PERRY). OKADA, K. D.Sc, Prof. — Biol. Inst., Gakugei Fac, Tokushima Univ.. TOKUSHIMA, Japan OKADA, T. S. — Lab. of Embryol. and Exper. Morphol., Zool. Inst., Dept of Sci., Kyoto Univ., KYOTO, Japan — Inst, of Animal Genet., Univ. Dept of Genet., King's Buildings, West Mains Rd, EDINBURGH 9, Scotland a. Differentiation of cartilage. (Amphibia), Mus musculus (Rodentia) (in collaboration with C. H. WADDINGTON) 81 Oka-Ozb OKADA. Y. K. M.J. A.. Dr. F.I. I.E.. Prof. — Nat. Mus. of Nat. Sci.. Ueno- Park. Daito-ku. TOKYO, Japan OKANO. H. M.Sc. — Dept of Biol., Fac. of Sci., Kyushu Univ., FUKUO- KA. Japan a. Artificial modification of developmental fate of various embryonic tis- sues. Triturus spec. (Urodela) b. Electron microscopy of developing tissues. Triturus spec. (Urodela) OKAZAKI, Miss K. — Embryol. Section, Dept of Biol., Tokyo Metropolitan Univ., Setagaya-ku, TOKYO, Japan a. A study of skeleton formation. (Echinodermata) h. Mechanism of gastrulation. (Echinoidea) c. Acceleration of metamorphosis. (Echinoidea) OKAZAKI, R. M.A. — Biol. Inst., Fac. of Sci., Nagoya Univ., Chigusa-Ku, NAGOYA. Japan a. Nucleic acid metabolism and cell multiplication during early develop- ment. (Echinodermata, Amphibia, Aues) (in collaboration with Mrs T. OKAZAKI and Y. KURIKI) b. Nucleic acid metabolism and cell multiplication in micro-organisms. (Ciliata, Bacteria) (in collaboration with Mrs T. OKAZAKI) OKAZAKI. Mrs T. M.A. — Biol. Inst., Fac. of Sci., Nagoya Univ.. Chigusa-Ku, NAGOYA, Japan a. Nucleic acid metabolism and cell multiplication during early development. (Echinodermata, Amphibia, Aves) (in collaboration with R. OKAZAKI and Y. KURIKI) b. Nucleic acid metabolism and cell multiplication in micro-organisms. (Ciliata. Bacteria) (in collaboration with R. OKAZAKI) OKSCHE. A. A. Drmed. — Anat. Inst, der Univ., Robert Kochstr. 6, MARBURG/Lahn, Deutschland a. Anderungen des Kaulquappen-Wachstums nach beiderseitiger Augen- Extirpation. Es soil hierbei die Rolle des Hypophysen-Zwischenhirn- Systems und der Epiphyse untersucht werden. Xenopus laevis (Anura) h. Die Feinstruktur der Sinneszellen des Organon frontale bei qualitativ und quantitativ modifiziertem Lichtreiz. Verhalten der spezifischen, mit Eisen-Haemota.xylin farbbaren Zellstrukturen wahrend des Individual- zyklus. Bu[o vulgaris (Larven), Rana temporaria, Xenopus laevis (Anura) c. Individualzyklische Entwicklung der Sekretion im Subcommissural-organ. Entwicklung der Nerven- und Gefassverbindungen der Organe des Zwischenhirndachs. Kliirung der Funktion. (Vertebrata) OLBRICH. E. Dr med. — Histol.-Embryol. Inst, der Univ.. Miillerstr. 59. INNSBRUCK. Tyrol. Oesterreich a. Morphomechanik. OLIVER, C. P. — Dept of Zool., Univ. of Texas, AUSTIN 12, Texas, U.S.A. (no embryological work in progress) OLIVIER, G. H. G. Prof. — Lab. d'Anat., Fac. de Med. de Paris, 45 Rue des Sts Peres. PARIS Vie, France a. Developpemcnt du plexus brachial. Homo sapiens (Primates) (en collaboration avec R. FEN ART) b. Developpemcnt du sympathique cervical. Homo sapiens (Primates) (en collaboration avec J. L. TARNUS) 82 c. Embryologie et croissance du squelette des membres. Homo sapiens (Pri- mates) (en collaboration avec H. PINEAU) OLSSON, R. Fil.lic. — Zootom. Inst., Univ. of Stockholm. 70A Radmans- gatan, STOCKHOLM, Sweden a. Development of nuclei and fibres in the brain. Polypterus spec. (Brachiopterygii) b. Development of Reissner's fibre and the infundibular and subcommissu- ral organs. Sranc/zios^oma spec. (Ccphalochotdata) , (several Vertebrata) c. Development of the epithalamus. (Branchiopterygii) OMODEO, P. Dr Sci. — 1st. di Biol, e Zool. gen.. Fac. di Med.. Piazza S. Agostino 4, SIENA. Italia OPPENHEIMER. Miss J. M. B.A., Ph.D., M.I.I.E. — Dept of Biol., Bryn Mawr Coll., BRYN MAWR, Pa. U.S.A. a. Experimental analysis of regional determination within the brain. Fun- dulus heteroclitus (Teleostei) leostei) b. Differentiation of extra-embryonic grafts. Fundulus heteroclitus (Te- O'RAHILLY, R. M.Sc, M.D., Prof. — Dept of Anat., Coll. of Med., Wayne State Univ., DETROIT 7, Mich.. U.S.A. a. Morphogenesis and developmental histochemistry of embryonic eye. Gallus domesticus (Aves) (in collaboration with D. B. MEYER) b. Development of skeleton and joints of foot in embryo and fetus. Homo sapiens (Primates) (in collaboration with E. GARDNER and D. J. GRAY) ORSINI, Mrs M. C. WARD B.A., Ph.D. — Dept of Anat., Bardeen Med. Labs, Univ. of Wisconsin. MADISON 6. Wis., U.S.A. a. Fetal membranes, giant cells, and pregnancy changes in uterine vessels. Cricetus auratus (Rodentia) ORSKA, Miss J. Ph.D. — Zaklad Anat. Porownawczej. Inst. Zool. Uniw., ul. Sienkiewicza 21. WROCLAW, Poland a. Development of the vertebral column centra. (Salmonidae, Teleostei) b. Influence of temperature on development of axial skeleton. (Teleostei) ORTOLANI, Miss G. Dr — 1st. di Zool., Via Archirafi 18, PALERMO. Italia a. Experiments on merogony. (Ascidiaceae) ORTS LLORCA, F. M.I.I.E., Prof. — Lab. de Anat. y Embryol., Fac. de Med., Ciudad Univ.. MADRID, Spain OSAWA, S. M.A. — Biol. Inst., Fac. of Sci., Nagoya Univ., Chigusa-Ku, NAGOYA. Japan a. Isolation of the bone marrow factor, which is responsible for induction of mesodermal structures in the ectoderm of the gastrula. (Amphibia, Mammalia) (in collaboration with K. TAKATA and T. YAM AD A) b. Studies on the ribonucleoproteins isolated from various tissues. (Mam- malia) (in collaboration with K. TAKATA) OVER, H. }. B.Sc. — Hubrecht Lab., Intern. Embryol. Inst., Janskerkhof 2, UTRECHT, Holland a. Search for species-specific histo- and cytological characteristics in early development. Representatives of various groups (Aves) OVERTON. Mrs J. Dr — Dept of Zool., Univ. of Chicago, CHICAGO 37, 111., U.S.A. OZBURN, R. H. Prof. — Dept of Entomol. and Zool., Ontario Agricultural Coll., GUELPH. Ont.. Canada 83 Pac-Pin PACKER. A. D. — Dept of Anat.. Univ. of Adelaide. ADELAIDE. S. Aus- PADOA. E. Dr. Prof. — 1st. di Zool.. Fac. di Sci.. Via Romana 17, FI- RENZE. Italia PADYKULA Miss H. A. B.S.. M.A.. Ph.D. — Dept of Anat.. Harvard Med. School. 25 Shattuck Str.. BOSTON 15. Mass.. U.S.A. PAI, S. Dr rer. nat.. F.I. I.E. — Lab. of Developm. Physiol.. Inst, of Exper. ' Biol.. Acad. Sinica. 865 Chang Ning Rd. SHANGHAI, China PANTELOURIS. E. M. B.Sc, Ph.D. — Inst, of Animal Genet.. Univ. Dept of Genet., Kings Buildings. West Mains Rd. EDINBURGH 9, Scotland a. Ovary transplants for detection of host effects on growth, and of transfer of specific molecules. Drosophila spec. (Diptera) b. Tests for specific molecule transfers. Mus musculus (Rodentia) PARI. F. Prof. — 1st. di Zool. e Anat. comp. dell'Univ.. Via A. Volta 4, PISA. Italia a. Reproduction and cytology. ( Rhabdocoela. Turbellaria) PARRANT. M. Dr en Med. — Lab. d'Embryol.. Fac. de Med.. 45 Rue des Sts Peres. PARIS Vie. France a. Developpement du svsteme dentaire. Homo sapiens (Primates) PASCHMA. M. M.Ph. — Zaklad Zool. Ogolnej. Inst. Zool.. Uniw. we Wroclawiu. ul. Sienkiewicra 21. WROCLAW. Poland a. Normal development, f Enchytraeidae. Oligochaeta) PASQUINI. P. Ph.D.. M.I. I.E.. Prof. — 1st. di Zool.. Via S. Giacomo 9. BOLOGNA. Italia a. Effects of antimitotics on early development and on lens-regeneration. Rana esculenta, Triton spec, Amby stoma spec. (Amphibia) (in collabo- ration with Mrs I. MAZZONI— DE CESARE) b. Effects of antimitotics on the regeneration of peripheral nerves. (Amphi- bia) (in collaboration with S. LEGHISSA) c. Effects of low temperature on early development. (Amphibia) (in col- laboration with E. MANELLI) PASTEELS. J. M.D.. F.I.I.E.. Prof. — Lab. d'Anat. et d'Embryol., Fac. de Med. de I'Univ.. 97 Rue aux Laines. BRUXELLES. Belgique a. General survey of development. Chry semis spec . Pseudemys spec. Chelone spec. (Chelonia), Chamaeleo spec. Mabuya spec. (Sauria) b. Cytochemical observations on first development. (Mollusca; Echinoidea) c. Metachromasia in eggs in vivo. (Evertebrata) d. Electron-microscopical analysis of eggs. Paracentrotus spec. (Echinoi- dea) PATTEN. B. M. Ph.D.. Prof. — Dept of Anat.. Med. School, Univ. of Michigan. 2500 East Med. Bldg. ANN ARBOR. Mich., U.S.A. PEDERSEN. K. J. M.Sc — Inst, for Aim. Zool.. Universitetsparken 3. COPENHAGEN O. Denmark a. Biochemistry of regeneration processes. (Planariidae, Plathelminthes) PEHRSON. G. T. Dr Phil.. Prof. — Zootom. Inst.. Univ. of Stockholm. R^dmansgatan 70A. STOCKHOLM. Sweden a. Development and morphology of the skull and of the lateraUs system. (Osteoglossidae and Characinidae, Teleostei) b. Ontogeny of the skull. Polyptenis spec. (Crossopterygii) 84 PEPPER, Miss F. J. B.Sc. Ph.D. — Dept of Zool. and Comp. Physiol., Birmingham Univ.. Edgbaston, BIRMINGHAM 15, England (no embryological work in progress) PERCIVAL, E. B.Sc. — Dept of Zool. Canterbury Univ. Coll.. CHRIST- CHURCH, New Zealand a. Embryology. Tegulorhynchia nigricans (Brachiopoda) PERLMANN, H. P. — Wenner-Grens Inst, for exper. Biol.. Norrtullsqatan 16, STOCKHOLM Va., Sweden a. Serological study of proteins during early development. Paracentrotus lividus (Echinodermata) (in collaboration with Mrs J. C. KALTEN^ BACH, Evanston. 111.. U.S.A.) PERRI, T. Dott., M.I.I.E.. Prof. — 1st. di Anat. Comp. dell'Univ.. Fac. di Sci., Via BorelH 50. ROMA. Itaha PERRY, Miss M. M. — Inst, of Animal Genet.. Univ. Dept of Genet., King's Buildings, West Mains Rd, EDINBURGH 9. Scotland a. Electron microscope studies of gene action (in collaboration with C. H. WADDINGTON and E. OKADA) b. Study of certain features of developing embryos using electronmicro- graphs of ultrathin sections and cytochemical techniques. Drosophila melanogaster (Diptera), (Amphibia) (in collaboration with C. H. WADDINGTON and G. G. SELMAN) c. Developmental effects of metabolic antagonists. (Evertebrata, Vevte- brata) (in collaboration with C. H. WADDINGTON and F. BIL- LETT) PERSSON, H. Fil.mag. — Zoophysiol. Inst.. Univ. of Lund. LUND. Sweden PESONEN, S. K. Ph.D. — Zool. Lab.. Univ. of Helsinki, P. Rautatie- katu 13. HELSINKI. Finland (no embryological work in progress) PETERS. Th. Dr med. — Heiligenberg-Inst., (17b) HEILIGENBERG. Kreis Ueberlingen/Bodensee. Deutschland a. Einfluss der Rontgenstrahlen auf die Entwicklung. (Urodela) RETRY. G. Dr med.. Prof. — Anat. Inst, der Univ.. Robert Kochstr. 6, MARBURG, Lahn. Deutschland a. Funktionelle Histologie der Eihaute. (Mammalia) PFLUGFELDER, O. Dr rer.nat.. Prof. — Zool. Inst, der Landwirtschaftl. Hochschule, STUTTGART-HOHENHEIM. Deutschland a. Anderung des Stoffwechsels nach Storung des hormonalen Gleichge- wichts. (Insecta) b. Entwicklungsphysiologie von Schwanzmissbildungen. (Teleostei, Aves) c. Einfluss der Pinealektomie auf die Postembryonalentwicklung. Lebistes reticulatus (Teleostei), (Amphibia, Sauropsida) d. Entwicklung. (Acari, Arachnoidea) e. Histophysiologie der Corpora cardiaca. (Insecta) PIATT, J. A.B.. M.A.. Ph.D. — Dept of Anat.. School of Med.. Univ. of Pennsylvania. PHILADELPHIA -i. Pa. U.S.A. PIEPHO, H. Dr Phil.. ProL — Zool. Inst, der Univ. Gottingen. Mathem.- Naturw. Fak.. Bahnhofstr. 28. GOTTINGEN. Deutschland PINCUS. G. Dr, Prof. — Worcester Foundation for Exper. Biol., 222 Maple Ave, SHREWSBURY, Mass.. U.S.A. 85 Pincus-Ram a. Physiology of reproduction. (Mammalia) b. Early development of eggs. (Mammalia) PINEAU. H. — Lab. d'Anat., Fac. de Med. de Paris, 45 Rue des Sts Peres, PARIS Vie, France a. Embryologie et croissance du squelette des membres. Homo sapiens (Primates) (en collaboration avec G. H. G. OLIVIER) PLESNER, P. Dr phil. — Biol. Inst, of the Carlsberg Foundation, 16. Tagensvej, COPENHAGEN N, Denmark a. Studies on the biochemistry and physiology of synchronized cell systems. Tetrahqmena pijriformis (Holotdcha, Ciliata) (in collaboration with K. HAMBURGER and E. ZEUTHEN) PLETZEN. R. van D.Sc. — Dept of Zool.. Univ. of O.F.S., BLOEMFON- TEIN, South Africa (no embryological work in progress) POHLEY, H.-J. Dr — Inst, fiir Entwicklungsphysiologie, Univ. zu Koln, Gyrhofstr. 17, KOLN-LINDENTHAL. Deutschland a. Entwicklung der Fliigel. Regeneration und Superregeneration der Flii- gelanlagen. Einwirkung der regenerierenden Anlagen auf den Zeitpunkt der Puppenhautung. Ephestia kiihniella Z. (Lepidoptera) h. Einfluss der Antennenlange auf das Wachstum der regenerierenden An- tennen. Einfluss der Antennenlange auf die Dauer der Larvenstadien. Pcriplaneta americana L. (Orthoptera) POLEZHAYEV. L. V. Dr Sci.Biol.. F.I.I.E.. Prof. — Inst, of Animal Mor- phol.. of the Acad, of Sci. of the U.S.S.R.. B. Kalushskaja 33, MOS- COW V-71, U.S.S.R. a. Regeneration of cranium bones. Mus domesticus. Rattus norvegicus, Oryctolagus cuniculus, Felis domestica, Canis [amiliaris (Mammalia) h. Regenerative capacity and immunity in ontogenesis. Rana temporaria, Bombina bombina (Anura) c. Regeneration of brain. Felis domestica, Canis [amiliaris, Rattus norvegi- cus (Mammalia) PORTMANN. A. DrPhil.. Prof. — Zool. Anstalt der Univ., Rheinsprung 9, BASEL. Schweiz a. Embryology and postembryonic development. (Araneida) b. Embryology of the forebrain (including postembryonic stages). (Aves) c. Development of skin pattern. (Reptilia) POULSON, D. F. B.S., Ph.D.. Prof. — Osborn Zool. Lab., Yale Univ.. NEW HAVEN 11. Conn.. U.S.A. a. Mid-gut: genesis and differentiation. Drosophila melanogaster (Diptera) b. Chromosomal control of differentiation. Drosophila melanogaster (Dip- tera) c. Neurogenesis in normal and genetically deficient embryos. Drosophila melanogaster (Diptera) d. Maternally inherited sex-ratio disturbances of development. Drosophila melanogaster (Diptera) PRETO PARVIS, Mrs V. Dott.Med.. Prof. — Cattedra di Istol. ed Em- briol. gener., Fac. di Med. e Chir. dell'Univ. di Milano. Via Mangiagalli 31, MILANO. Italia a. Nucleic acids and fatty substances in nervous cells during development. Rattus norvegicus. Felis domestica, Cavia cobaya (Mammalia) h. Morphological and histochemical studies of histogenesis of mucous and 86 chondroid tissues. Mucous tissue of the embryo (gelatina cardiaca) and of the valves of the heart. Gallus domesticus (Aves) c. Quantitative study about the pre- and postnatal increase of cerebellar cortex and of its different strata. Felis domestica, Cavia cobaya, Rattus norvegicus (Mammalia) d. Modifications in the histochemical characters of squamous stratified epithelia during the development, in connection with the modifications of the external medium. Epidermis. Rattus norvegicus (Rodentia) PRIESCHING. A. M.D. — Anat. Inst., Wahringerstr. 13, WIEN 9. Oes- terreich a. Development of the pars dextra omenti. Homo sapiens (Primates) PROP, N. B.Sc. — Anat.-Embryol. Lab. der Rijks Univ., Oostersingel 69, GRONINGEN, Holland PUJIULA. J., S. I. M.I.E., M.R.Ac.Med. — Inst. Biol, de Sarria, Dr Ami- qant 14. BARCELONA. Sarria, Esparia QUeNU. L. Dr en Med. — Lab. d'Anat., Fac. de Med. de Paris, 45 Rue des Sts Peres, PARIS Vie, France a. Developpement de I'appareil respiratoire. Homo sapiens (Primates) b. Developpement du peritoine. Homo sapiens (Primates) QUEREUX, P. Dr en Med. — Lab. d'Anat., Fac. de Med. de Paris, 45 Rue des Sts Peres. PARIS Vie. France a. Developpement du systeme bronchopulmonaire. Homo sapiens (Primates) b. Developpement de la cavite peritoneale. Homo sapiens (Primates) QUERNER, H. Dr rer.nat. — Inst. f. exp. Krebsforschung der Univ. Hei- delberg. Voss-Strasse 3, HEIDELBERG, Deutschland a. Hormonphysiologische Untersuchungen. (Cyprinodontidae, Teleostei) h. Differenzierung primarcr und sekundarer Geschlechtsorgane i n vitro. (Cyprinodontidae, Teleostei) RADECKA. Mrs E. ERDMAN M.Ph. — Zaklad Zool. Ogolnej, Inst. Zool.. Uniw. we Wroclawiu, ul. Sienkiewicza 21, WROCLAW, Poland a. The morphoqenetical functions of the thyroid gland and hypophysis. (Amphibia, Reptilia, Aves) RAE— WICKHAM, Mrs C. A. B.Sc. — Dept of Zool.. Univ. of New Eng- land, ARMIDALE. N.S.W.. Australia a. Endocrine organs and their developmental role. Blattella germanica L., Periplaneta spp. (Dictyoptera, Insecta) RAMIREZ de ARELLANO, Miss M. I. R. B.S.. M.S.. Ph.D., M.B.. M.D. — Lab. of Perinatal Physiol., NINDB, School of Med., SAN JUAN. P.R., U.S.A. a. Effects of adverse factors in the perinatal period on the electroencephalo- gram of the fetus and infant. (Rodentia, Primates) (in collaboration with J. RANCK) RAMSEY, Miss E. M. A.B., M.D. — Dept of Embryol., Carnegie Inst, of Washington, Wolfe and Madison Sts, BALTIMORE 5, Md, U.S.A. a. Placentation. Study of marginal sinus and venous drainage of placenta. Macaca mulatta. Homo sapiens (Primates) b. Study of circulation in the maternal placenta. Macaca mulatta. Homo sapiens (Primates) c. Determinations of blood, amniotic and intervillous space pressures throughout pregnancy. Macaca mulatta (Primates) (in collaboration with G. W. CORNER. Jr and W. N. LONG) 87 Ran-Rcm RANCK J. B.S.. M.D. — Lab. of Perinatal Physiol.. NINDB. School of Med., SAN JUAN, P.R.. U.S.A. a. Effects of adverse factors in the perinatal period on the electroencephalo- gram of the fetus and infant. (Rodentia. Primates) (in collaboration with Miss M. I. R. RAMIREZ de ARELLANO) RANZL S. Ph.D., F.LLE., Prof. — 1st. di Zool. e Anat. Comp., Univ. di Milano. Via Celoria 10, MILANO. Italia a. Proteins and antigens in embryonic development. (Echinodermata. Am.' phibia) RANZOLI. F. Dr — 1st. di Zool. e Anat. comp.. Via Universita 4, MO- DENA, Italia a. Nucleolar changes and cycle of the ribonucleic acids during oogenesis. (Gastropoda, Ascidiaceae) b. Sexual differentiation and hermaphroditism. Hydroides norvegica (Ser- pulidae, Polychaeta) c. Regeneration and morphogenesis of the thoracic segments. Salmacina in- crustans (Serpulidae, Polychaeta) RAPPAPORT. Jr, R. B.S., M.S., Ph.D. — Dept of Biol., Union Coll., SCHENECTADY 8, N.Y., U.S.A. a. Role of water in growth and morphogenesis. Rana pipiens (Anura) b. Early embryology. Marino gammarus obtusatus (Gammarides, Crusta- cea) RASMONT, R. Lie. Sci. Zool. — Lab. de Zool., Fac. des Sci.. Inst. Zool. Torley-Rousseau, Univ. libre de Bruxelles, 50 Avenue F. D. Roosevelt, BRUXELLES. Belgique RAUNICH, L. Ph.D., M.D., M.I.I.E. — 1st. di Anat. Comp., Univ. di Fer- rara, FERRARA, Italia — 1st. di Anat. Comp., Via Belmeloro 8, BOLOGNA (103), Italia a. Development of blood and vascular system. Petromyzon spec. (Cyclo- stomata), Amia spec, Lepidosteus spec. (Holostei) b. Action of growth-substances on tail-regeneration. Rana spec, Bufo spec. (Anura) c Determination of neural plate. Triton spec, Ambystoma spec. (Urodela) d. Neural crest development. (Amphibia) e. Action of carcinogenic hydrocarbons. (Amphibia) i. Steroids during development (chemical detection). (Amphibia) RAVEN, Chr. P. Dr Sc, F.I.I.E., F.R.A.. Prof. — Zool. Lab. der Rijks Univ., Janskerkhof 3, UTRECHT, Holland a. Influence of lithium on morphogenesis. Aplysia limacina (Gastropoda) b. Influence of various kations on development. Limnaea stagnalis (Gas- tropoda) (in collaboration with W. L. M. GEILENKIRCHEN) c Development of stomodaeum. Limnaea stagnalis (Gastropoda) d. Structure of egg-follicle during oogenesis. Limnaea stagnalis (Gastro- poda) e. Maturation divisions of eggs. Various spp. (Gastropoda) RAWLES, Miss M. E. Ph.D., M.I.I.E. — Dept of Embryol.. Carnegie Inst. of Washington. Wolfe and Madison Sts. BALTIMORE 5. Md, U.S.A. RAYNAUD. A. Dr es Sci. — Lab. de I'lnst. Pasteur, SANNOIS, Seine et Oise. France a. Recherches sur le developpement embryonnaire normal de la glande mammaire. Mus musculus (Rodentia) 88 b. Production experimentale de malformations mammaires chez le foetus, par action des hormones sexuelles. Mus musculus (Rodentia) c. Etude de revolution post-natale des malformations mammaires. Mus musculus (Rodentia) RAZIMBAUD, Miss J. Lic.es Sci. — Lab. de Zool., Fac. des Sci. de Bor- deaux, 40 Rue Lamartine, TALENCE, Gironde, France a. Etude experimentale de la morphogenese embryonnaire de la tete. Carausius spec. (Orthoptera) REAMS, Jr, W. M. B.S., Ph.D. — Dept of Anat., Med. Coll. of Virqinia RICHMOND 19, Va, U.S.A. ^ a. Ontogeny of melanocyte form. Gallus domesticus (Aves) REBERT, R. R. B.A., M.A.. Ph.D. — Dept of Med. Res., Merck Sharp and Dohme Research Labs, Div. of Merck and Co Inc., 4545 Oleatha Ave, ST LOUIS 16. Mo., U.S.A. a. Origin of the ciliary ganglion. Ambystoma punctatum (Urodela) b. Preliminary experiments on induction of germ cells. Ambystoma punc- tatum (Urodela) RECHENMANN, R. Lie. es Sci. — Lab. de Zool. et d'Embryol. exper.. Inst, de Zool. et de Biol, gener., 12 Rue de I'Universite, STRAS- BOURG, France a. Morphogenese et physiologie embryonnaire des glandes endocrines. (Selachii, Teleostei) (en collaboration avec J. H. VIVIEN et J. SCHOTT) RECOURT, A. M.Sc. — Centrum voor Electronenmicroscopie, Janskerkhof 3, UTRECHT, Holland a. Electron microscopy of the gonad. Limnaea stagnalis L. (Gastropoda) REGGIANI, Miss M. P. Dr — 1st. di Zool. e Anat. comp.. Via Universita 4, MODENA. Italia a. Origin of the germ-cells; spermatogenesis; oogenesis. Spirorbis pagen- stecheri (Serpulidae, Polychaeta) b. Morphogenesis of gonads and Bidder's organs. Bufo bufo (Anura) REINBOLD. R. Lie. es Sci. — Lab. de Zool. et d'Embryol. exper.. Inst, de Zool. et de Biol, gener.. 12 Rue de I'Universite. STRASBOURG. France a. Differenciation sexuelle normale et conditionnement hormonal du tuber- cule genital chez I'embryon. Gallus spec. (Aves) b. Le developpement et la differenciation de I'oeil en culture in vitro. Gallus spec. (Aves) REIS. R. H. Ph.D. — Dept of Biol., Marquette Univ., 1217 West Wiscon- sin Ave, MILWAUKEE 3. Wis., U.S.A. a. A study of the anomalous renal vessels and inferior vena cava. Canis [amiliaris, Felis domestica (Carnivora) h. A study of the anomalous renal vessels and inferior vena cava. Homo sapiens (Primates) c. The development of the postcava. Canis [amiliaris (Carnivora) REMBIELInSKI, B. M.D. — Inst, of Histol. and Embryol., Acad, of Med.. Narutowicza 60, LODZ, Poland a. Influence of sulfonamides on the development of the embryo. Gallus domesticus (Aves) REMOTTI, E. Dott. Med. e Chirurg., Prof. — 1st. di Anat. e Fisiol. Comp., Univ. di Geneva. GENOVA, Italia 89 Rcn-Rom RENGEL S.. L. Dr Med.. Prof. — Dept of Annt.. Fac. de Ci. Med., Uni- versidad dc Los Andes, MERIDA. Venezuela a. Development of the connective tissue (mouth, pelvis etc.) Homo sapiens RESTIVO. Miss F. Dr — 1st. di Zool.. Via Archirafi 18, PALERMO, Italia a Glycopen content during development. (Ascidiaceae) REVERBERI. G. Dr, F.LLE., Prof. — 1st. di Zool., Via Archirafi 18. PALERMO, Italia a. The role of some enzymes in the embryonic development. ^Marine Evertebrata) REXED. B. M.D.. Prof. — Anat. Inst., Univ. Uppsala, UPPSALA, Sweden (no embryological work in progress) REYER R. W. B.A., M.A., Ph.D.. M.I.I.E. — Dept of Anat.. School of Med.. Univ. of West Virginia. MORGANTOWN. W.Va, U.S.A. a. An e.xperimental analysis of lens regeneration: a study of the causal mechanisms involved in lens regeneration from the dorsal iris and their relation to the processes of lens induction in the embryo. Triturus viri' descens, Amby stoma punctatum (Urodela) (in collaboration with L. S. STONE. New Haven) b. A study of the coordinate induction systems operating in the develop- ment of the embryonic lens. Triturus viddescens, Ambystoma punctatum (Urodela) REYNOLDS. S. R. M. A.B.. M.A.. Ph.D., D.Sc.(hon.). Dr hon. causa (Univ. Catol. de Chile). Prof. hon. causa (Fac. de Med., Montevideo) — Dept of Anat.. Coll. of Med.. Univ. of Illinois, CHICAGO 12, 111.. U.S.A. a. Fetal vascular physiology. Homo sapiens, Lepus spec, Ovis spec. (Mam- malia) h. Uterine contraction patterns. Homo sapiens (Primates) c. Pulmonary vasculature, fetal and neonatal condition. Cacia spec, (Ro- dentia). Ovis spec. (Artiodactyla) d. Architecture of umbilical blood vessels, distended and nondistended. Homo sapiens (Primates) REYSS— BRION, Mrs M. — Lab. d'Embryol. exper. du Coll. de France, et Lab. d'Embryol. et de Teratol. exper. du C.N.R.S., 11 Place Marcelin Berthelot, PARIS Ve, France a. Malformations provoquees par I'irradiation aux rayons X de jeunes stades embryonnaires. Pleurodeles Waltlii (Urodela), Gallus gallus (Aves) RHODES, S. A. M.S. — Franklin Coll., FRANKLIN, Ind., U.S.A. RICHTER. K. M. B.A.. M.A., Ph.D. — Dept of Anat., School of Med., Univ. of Oklahoma, OKLAHOMA CITY, Okla.. U.S.A. RICHTER, Miss W. E. Biol.Cand. — Afd. Zool., Biol. Lab., Vrije Univ.. Rapenburgerstr. 128. AMSTERDAM. Holland RIECK. A. F. B.S.. M.S.. Ph.D. — Dept of Physiol.. Marquette Univ.. MILWAUKEE 3. Wis. U.S.A. a. Quantitative correlation of the regenerative process with thyroid activity. Triturus viridescens (Urodela) b. Studies on the determination of the limb regeneration blastema. Amby- stoma maculatum (Urodela) 90 c. Analysis of components in the regeneration of adult forelimbs, using ultraviolet radiation. Triturus viridescens (Urodela) ROBERTSON. G. G. B.A., B.Sc. Ph.D., Prof. — Div. of Anat., Med. Units Div., Fac. of Biol. Sci., Univ. of Tennessee, MEMPHIS 3, Tenn., U.S.A. a. Virus-induced abnormalities in embryos. Gallus domesticus (Aves) h. Analysis of growth rates of prenatal ossification centers. Homo sapiens (Primates) ROCCA, E. Dr Biol.Sci. — 1st. di Zool. e Anat. comp., Univ. di Milano, Via Celoria 10, MILANO, Italia phibia) a. Flow birefringence and physical chemistry of embryonic proteins. (Am- ROCK. J. M.D. — Free Hospital for Women, 245 Pond Ave, BROOK- LINE. Mass., U.S.A. a. Histochemical observations on early fertilized ova of less than 14 days age. Homo sapiens (Primates) (in collaboration with A. T. HERTIG, W. J. MULLIGAN and Miss E. C. ADAMS) ROCKSTEIN. M. A.B., M.A., Ph.D. — Bellevue Med. Center, New York Univ., 550 First Ave, NEW YORK 16, N.Y., U.S.A. a. Physiological basis of aging, growth and metamorphosis. Musca domes- tica (Diptera) h. Metachemogenesis — post-emergence biochemical maturation. (Holo- metabola, Insecta) ROLLHAUSER, H. Dr med.. Prof. — Anat. Inst, der Univ., Robert Koch- strasse 6, MARBURG/Lahn, Deutschland (no embryological work in progress) ROLLHAUSER— ter HORST, Mrs J. O. B. Dr rer.nat. — Anat. Inst, der Univ., Robert Kochstr. 6. MARBURG/Lahn, Deutschland a. Reaktion verschieden vorbehandelten Gastrula-Ektoderms auf densel- ben heterogenen Induktor. Behandlung der Gastrulae mit Hormonen, NaF, Butylalkohol u.a. Mit dem isolierten Ektoderm dieser Gastrulae werden Stucke erwachsener Triton-Leber umhiillt. Triton alpestris (Urodela) ROMANI, Miss M. L. Dr — 1st. di Zool. e Anat. comp.. Via Universita 4, MODENA, Italia a. Activity of sex hormones on the sex differentiation of gonads and Bid- der's orqan. Bufo bufo (Anura) ROMANKOWOWA, Mrs A. M.Sc. — Zaklad Anat. Porownawczej, Inst. Zool. Uniw., ul. Sienkiewicza 21, WROCLAW, Poland a. Development of sesamoid bones in the carpus. (Rodentia, Insectivora) ROMANOFF, A. L. B.S., M.S., Ph.D., Prof. — Lab. of Chem. Embryol., Cornell Univ., c/o Rice Hall 105, ITHACA. N.Y., U.S.A. ROMANOVSKY, a. D.Sc. — Dept of Gener. and Exper. Zool.. Zool. Inst, of Charles Univ., Vinicna 7, PRAHA II. Czechoslovakia a. Regeneration of the central nervous system in early developmental stages. Ambystoma mexicanum, Triturus alpestris, Triturus taeniatus (Urodela) b. The influence of parabiosis in early embryonal stages on survival of heteroplastic grafts of limbs and skin. Ambystoma mexicanum, Triturus alpestris, T. taeniatus, T. cristatus, T. montandoni (Urodela) ROMIJN, C. Dr, Prof. — Lab. for Veterinary Physiol., Alexander Numan- kade 93, UTRECHT, Holland 91 Romijn-Run a. Investigations on the respiratory metabolism and heat regulation in the embryo. Galhis domesticus (Aves) b. The role of the allantoic circulation in the heat elimination of the em- bryo. Gallus domesticus (Aves) RONCORONI. G. — Cattedra di Istol. ed Embriol. gener., Fac. di Med. e Chir. deirUniv. di Milano, Via Mangiagalli 31, MILANO. Italia a. Studies of solubility of embryonic glycogen with freezing-drying, freez- ing-substitution and chemical methods of fixation. (Mammalia) ROOFE. P. G. Ph.D., Prof. — Dept of Anat., Med. School, Univ. of Kan- sas, LAWRENCE. Kansas, U.S.A. a. Cytochemical and microchemical study of the developing nervous system and its relationship to developing behavior patterns. Acid and alkaline phosphatase in isolated areas of brain and spinal cord. Ambystoma macu- latum (Urodela) (in collaboration with Mrs E. L. WENGER and B. S. WENGER) b. Histochemical study of the developing nervous system and its relation- ship to developing behaviour patterns. DNA, RNA. acid and alkaline phosphatase. Ambystoma maculatum (Urodela) (in collaboration with Mrs E. L. WENGER and L. KELLER) ROOSEN-RUNGE. E. C. M.D. — Dept of Anat., School of Med., Univ. of Washington, SEATTLE 5, Wash.. U.S.A. a. Quantitative studies in spermatogenesis. (Mammalia) b. The development of the male reproductive .system. (Mammalia) ROSE. S. M. Ph.D.. M.I. I.E.. Prof. — Dept of Zool., Univ. of Illinois, URBANA. 111.. U.S.A. ROSENBAUM, R. M. B.S., A.M., Ph.D. — Dept of Pathol., Albert Ein- stein Coll. of Med., Yeshiva Univ., Eastchester Rd and Morris Park Ave, NEW YORK, N.Y.. U.S.A. a. Effects of hyperatmospheres of oxygen on development. Rana pipiens, Rana sylvatica, Ambystoma punctatum and other spp. (Amphibia) h. Cytochemistry of the ..haploid syndrome". Rana pipiens, Rana sylvatica, Ambystoma punctatum and other spp. (Amphibia) c. Cytochemistry of the cortical region of the egg. Rana pipiens, Rana syl- vatica, Ambystoma punctatum and other spp. (Amphibia) ROSIN. S. Dr. Prof. — Abt.f.Genet., Zool. Inst, der Univ. Bern. Sahlistr. 8, BERN. Schweiz a. Borstenmuster und Fliigelentwicklung. Drosophila spec. (Diptera) (in Zusammenarbeit mit W. NEF) ROSS. Miss J. R. W. B.Sc. M.B.. Ch.B. — Anat. Dept. Charing Cross Hosp. Med. School. 62 Chandos Place. LONDON W.C. 2. England a. The development of the genital tract. Ovis aries (Artiodactyla) ROSS. S. Fil.mag. — Inst, for Zoophysiol.. Uppsala Univ.. UPPSALA. Sweden a. The mechanism of agglutination of spermatozoa. (Mammalia) (in colla- boration with P. E. LINDAHL and N.-O. BODIN) ROSSI. A. Dr — 1st. di Anat. comp. "G. B. Grassi". Fac. di Sci., Univ. di Roma. Via Borelli 50. ROMA. Italia a. Xenoplastic grafts. (Amphibia) ROSSI-DE RUBEIS. F. Prof. — 1st. di Anat. Um. norm., Univ. di Genova, Viale Benedetto 15, GENOVA. Italia 92 ROSSINI, Miss M. C. Dr Nat.Sci. — 1st. di Anat. Comp.. Via Bclmeloro S, BOLOGNA (103), Italia a. Analysis of formative movements during neurulation (with vital stains). (Amphibia) b. Researches on development of neural crest. (Amphibia) ROSTAND, J. — 29 Rue Pradier, VILLE d'AVRAY, Seine et Oise, France a. Parthenogenese et gynogenese; regulation chromosomique par le froid. (Amphibia) h. Mutations (polydactylie, ectrodactylie, etc.) et anomalies provoquecs par le milieu exterieur (principalement, "Anomalie P"). (Amphibia) c. Action protectrice de la glycerine a I'egard de la congelation des cellules spermatiques. (Amphibia) ROTHENBUHLER, W. C. B.S.. M.S., Ph.D. — Dept of Zool. and Ento- mol., Iowa State Coll., AMES, Iowa, U.S.A. a. Cleavage of zygote and accessory sperms in the origin of gynandro- morphs. Apis mellifeva (Hymenoptera) b. Genetics of sex determination in haplo-diploid mosaics. Apis mellifeta (Hymenoptera) ROTHSCHILD, Lord — Univ. Museum of Zool.. Univ. of Cambridge, Downing St, CAMBRIDGE, England a. Sperm and fertilization (in collaboration with J. GRAY). ROUX, C. — Lab. d'Embryol., Fac. de Med., 45 Rue des Sts Peres, PARIS Vie, France a. Anomalies du systeme uro-genital. Mus rattus (Rodentia) RUDEWICZ, Mrs Cz. Physician — Inst, of Histol. 6 Embryol., Acad, of Med.. Narutowicza 60. LODZ, Poland RUDNICK. Miss D. Ph.D., M.I.I.E. — Osbom Zool. Lab.. Yale Univ., NEW HAVEN II, Conn.. U.S.A. a. Glutamine metabolism in development. Gallus spec. (Aves) RUGH, R. A.B., M.A., Ph.D., M.I.I.E. — Radiological Research Lab.. Dept of Radiol., Coll. of Physicians & Surgeons, Columbia Univ., 630 West 168th St, NEW YORK 32. N.Y., U.S.A. a. Heterosis and X-irradiation tolerance. Mus musculus (Rodentia) b. Sensitivity to irradiation of the fetal testes at different stages of develop- ment. Mus musculus (Rodentia) c. Reparation of the fetal eye following irradiation insult. Mus musculus (Rodentia) d. Behavior following low-level fetal X-irradiation. Rattus norvegicus (Rodentia) RUNNER, M. N. Ph.D. — Roscoe B. Jackson Memorial Lab.. BAR HAR- BOR, Me, U.S.A. a. Hormonal induction of ovulation, conception and pregnancy in prepu- beral animals. Mus musculus (Rodentia) b. Parental and dietary influences on skeletal morphogenesis. Mus mus- culus (Rodentia) c. Carbohydrate metabolism in relation to chemically induced phenocopies of the skeleton. Mus musculus (Rodentia) d. Hereditary susceptibility to congenital deformity. Mus musculus (Ro- dentia) RUNNSTROM, J. A. M. Ph.D., M.D., F.I.I.E., Prof. — Wenner-Grens Inst, for exper. Biol.. Norrtullsgatan 16, STOCKHOLM Va., Sweden 93 Runnstrom-Sau a. Induction phenomena in development. (Echinodermata) b. Physiology of fertilization. (Echinodermata) RUTH R F Dept of Embryo!.. Carnegie Inst, of Washington, Wolfe and Madison Sts. BALTIMORE 5. Md, U.S.A. a. Biochemical and immunochemical analysis of the synthesis and distri- bution of the contractile proteins, actin, myosin (esp. H-meromyosin) and tropomyosin in the development of the heart in the early embryo. Gallus gallus (Aves) (in collaboration with J. D. EBERT) b. The metabolic characteristics of the heart-forming areas of the early embryo. Gallus gallus (Aves) (in collaboration with J .D. EBERT) RUUD, Miss G. Cand.real. — Zool. Lab., Univ. of Oslo, OSLO-BLIN- DERN, Norway RYCHTER. Z. MUDr — Dept of Anat., Charles Univ., U nemocnice 3, PRAHA II, Czechoslovakia a. Experimental morphology of the aortic arches and of the heartloop. Gallus domesticus (Aves) b. Experimental analysis of cardiovascular anomalies. Gallus domesticus (Aves) RYKE, P. A. J. M.Sc. Ph.D. — Dept van Dierkunde, Potchefstroom Univ., POTCHEFSTROOM, Suid-Afrika (no embryological work in progress) SABBADIN, A. Dr — 1st. di Zool. e Anat. comp., Fac. di Sci., Via Loredan 10. PADOVA, Italia a. Differentiation of gonads. (Reptilia) h. Gonad development. Influence of thyroidectomy and hypophysectomy; role of mesonephros and adrenals. (Amphibia) c. Sexual and asexual reproduction. (Ascidiacea) SAKAI, H. M.A. — Embryol. Section, Dept of Biol., Tokyo Metropolitan Univ., Setagaya-ku, TOKYO, Japan a. The behaviour of glutathione and protein sulfhydryl groups during egg cleavage. (Echinoidea) SALA. M., S.J. Dr — 1st. di Zool. e Anat. Comp., Fac. di Sci., Via Lore- dan 10, PADOVA, Italia a. Distribution of activating and transforming principles in the archenteron roof of the neurula (analysis of the regional induction of the nervous system). Amby stoma mexicanum (Urodela) h. Determination of the peripheral nervous system. (Anura) SALFI, M. Dr Sci. Nat., Prof. — 1st. di Zool., Universita, Via Mezzocan- none 8, NAPOLI, Italia a. Blastogenesi. (Ascidiacea) SALZGEBER, Miss B. Dr es Sci. — Lab. d'Embryol. exper. du Coll. de France, et Lab. d'Embryol. et de Teratol. exper. du C.N.R.S., 11 Place Marcelin Berthelot, PARIS Ve. France a. Recherches sur Taction d'agents physiques et chimiques sur la differen- ciation sexuelle. b. Action de substances chimiques sur les gonades embryonnaires cultivees in vitro. SAMANO BISHOP, Miss A. Dr — Inst, de Biol., Ciudad Universitaria, MfiXICO D.F., Mexico a. Origin and development of the acustic ganglia. Sceloporus microlepido- tus (Iguanidae, Reptilia) 94 b. Development. Tomodactylus [uscus Davis & Dixon (Amphibia) SAMBUICHI. H. Dr — Zool. Lab.. Fac. of Sci., Hiroshima Univ..' Higashi- senda-cho. HIROSHIMA, Japan SAMUELS. A. J. Ph.B. — Div. Chem. Embryol.. Med. Center. Univ. of Colorado. 4200 East Ninth Ave. DENVER 20. Colo. U.S.A. a. Chemistry of muscle differentiation. Gallus domesticus (Aves) (in col- laboration with H. HERRMANN and I. R. KONIGSBERG) SANDER. K. Dipl.biol., Ph.D. — Zool. Inst, der Univ. Tubingen. Holder- linstr. 12. TQBINGEN. Deutschland a. Primitiventwicklung. Euscelis plebejus (Cicadina, Homoptera) SANGVICHIEN, S. M.B.. M.D. — Dept of Anat.. Fac. of Med. and Siri- raj Hospital. Univ. of Med. Sci.. BANGKOK, Thailand a. An attempt to produce regeneration of the lens. Hemidactylus platyurus (Lacertilia) SANIR. Miss E. K. M.D. — Lab. for Cytol. and exper. Histol., Fac. of Med., Univ. of Leyde. Rijnsburgerweg 10. Boerhaavekwartier, LEIDEN, Holland a. Thyroid development in vitro. Gallus gallus (Aves) SANYAL. S. M.Sc. — Dept of Zool.. Presidency Coll.. College St. CAL- CUTTA 12. India a. Mechanism of cellular differentiation. Hydra spec. (Coelenterata) h. Cell transplantation and isolation. Hydra spec. (Coelenterata) (in col- laboration with S. MOOKERJEE) SATO. T. D.Sc, D.Phil.Nat., M.I.I.E., Prof. — Biol. Inst., Fac. of Sci., Nagoya Univ., Chigusa-Ku, NAGOYA, Japan — temporarily: Max Planck-Inst. fiir Meeresbiol., Anton Dohrn-Weq, WILHELMSHAVEN. Germany SAUNDERS. J. W. B.S.. M.S.. Ph.D.. M.I.I.E. — Dept of Biol.. Marquette Univ., 1217 West Wisconsin Ave. MILWAUKEE 3. Wis., U.S.A. a. Identification of prospective pigment cells. Gallus domesticus (Aves), Mus musculus (Rodentia) b. Factors affecting the rate of melanin synthesis in embryonic tissues. Gallus domesticus (Aves), Mus musculus (Rodentia) c. The role of the ectoderm in the development of the limbs. Gallus domes- ticus (Aves) d. An analysis of the factors affecting tract-specificity in embryonic feather areas. Gallus domesticus (Aves) e. Ectoderm-mesoderm interactions in formation of the limbs. Gallus do- mesticus (Aves) f. Cellular deaths in morphogenesis of the embryonic limbs. Gallus domes- ticus (Aves), Mus musculus (Rodentia) g. Production of tumor-specific antibodies. Gallus domesticus (Aves), Mus musculus (Rodentia) h. Fate-maps for the limb buds. Gallus domesticus (Aves) SAUSER. G. Dr, Dr, Mr, Prof. — Histol.-Embryol. Inst, der Univ., Miiller- str. 59, INNSBRUCK, Tyrol, Oesterreich a. Morphomechanik. Homo sapiens (Primates) b. Histophysiologie und quantitative Cytologie. c. Farbungs- und Konservierungstechnik. Homo sapiens (Primates) d. Morphogenese und Histogenese. e. Gewebeziichtung. 95 Saw-Sch SAWIN P B. B.S.. M.S.. Sc.D. — Roscoe B. Jackson Memorial Lab., BAR HARBOR. Me. U.S.A. a. Racial differences in regional growth processes from onset of ossitica- tion to birth. Oryctolagus cuniculus (Lagomorpha) b Disproportionate growth induced by the ..Dacks" (Da) gene and reces- sive achondroplasia ac (Pearce & Brown) genes at 22 days postcopula- tion. Oryctolagus cuniculus (Lagomorpha) c. The interaction of the regional growth processes and these specific dis- proportionate growth genes induced by hybridization. Oryctolagus cuni- culus (Lagomorpha) SAX£N L O. M.A., M.D. — Zool. Lab., Univ. of Helsinki, P. Rautatie- katu 13, HELSINKI Finland a The inductive action of malignant tumors. Triturus spec. (Urodela) (in collaboration with S. I. TOIVONEN) b. Thyroid gland and adenohypophysis in normal and delayed metamor- phosis. Xenopus lacvis (Anura) (in collaboration with S. I. TOIVO- NEN) SCHABERG. A. M.D. — Lab. for Cytol. and exper. Histol., Fac. of Med., Univ. of Leyde, Rijnsburgerweg 10, Boerhaavekwartier, LEIDEN, Hol- land a. Development of suprarenal gland. Homo sapiens (Primates) b. Hypothalamic-pituitary-suprarenal interrelations. Rattus spec. (Roden- tia) SCHALEKAMP. M. A. D. H. Med. Cand. — Anat.-Embryol. Lab.. Free Calvinistic Univ.. Pr. Hendriklaan 27, AMSTERDAM Z, Holland a. An investigation into the presence of specific protein-antigens in the brain. Gallus domesticus (Aves) SCHECHTMAN. A. M. A.B., Ph.D.. F.I. I.E.. Prof. — Dept of Zool., Univ. of Calif.. LOS ANGELES 24. Gal., U.S.A. SCHEIB— PFLEGER, Mrs. D. Dr es Sci. — Lab. d'Embryol. exper. du Goll. de France, et Lab. d'Embryol. et de Teratol. exper. du C.N.R.S., 1 1 Place Marcelin Berthelot, PARIS Ve, France — Lab. de Zool. et d'Embryol. exper., Inst, de Zool. et de Biol, gener., 12 Rue de I'Universite, STRASBOURG, France a. La differenciation sexuelle, par les methodes de greffes, de castration, d'injections d'hormones et d'explantations. Differenciation normale et inversion sexuelle des gonades, des voies genitales et des caracteres somatiques precoces. Gallus spec, Anas spec. (Aves) (en collaboration avec Et. C. WOLFF, Miss B. SALZGEBER, A. HAMPe et G. STRUDEL) SCHENK. R. DrMed. — Anat. Inst, der Univ., Pestalozzistr. 20, BASEL, SCHINCKEL. P. G. B.V.Sc. — Div. of Animal Health and Production, C.S.I.R.O.. Sheep Biol. Lab., Great Western Highway, (P.O. Box 144 Parramatta), PROSPECT, N.S.W., Australia a. Pre-natal development and organization of the hair follicle population. Oris spec. ( Artiodactyla) SCHJEIDE, O. A. Ph.D. — Atomic Energy Project, Univ. of CaHf., LOS ANGELES. Cal.. U.S.A. SCHLESINGER, A. B. B.A., M.S. — Dept of Biol., School of Med., The Creighton Univ., OMAHA. Nebraska, U.S.A. 96 a. Physical and chemical nature of yolk. (Aves) b. Mechanisms of growth of the marginal blastoderm. Gallus spec. (Aves) c. A description of the normal regression of mesenchyme in the middle ear cavity as compared with retention of middle ear mesenchyme in congenital conduction deafness. Rattus norvegicus (Rodentia) d. Experimental attempts to alter the rate of mesenchymal regression in the middle ear cavity. Rattus norvegicus (Rodentia) e. Differentiation capacities of middle ear mesenchyme in vitro and as chorio-allantoic grafts. Rattus norvegicus (Rodentia) SCHNEIDER, D. Dr rer.nat. — Max Planck-Inst. fiir Biol., Spemannstr. 34. TOBINGEN. Deutschland a. Entwicklungsphysiologie des Phototropismus. b. Bildung des Integuments. c. Regeneration. d. Polymorphismus. Bugula avicularia (L) (Gymnolaemata, Bryozoa ecto- pTOcta) e. Wachstum von Kalkkristallen im Integument. (Bryozoa stenolaemata et gymnolaemata) SCHNEIDER, R. Dr med. — Dr Senckenberg. Anat. Inst., Med. Fak. der Univ., Ludwig Rehnstr. 14, FRANKFURT/Main-Siid, Deutschland SCHNETTER, M. Dr phil. — Zool. Inst, der Univ., Katharinenstrasse 20, FREIBURG i. Brsg.. Deutschland SCHNITTER. M. — Zool.vergl. Anat. Inst.. Naturw. Fak.. Univ. Zurich, Kunstlergasse 16, ZURICH 6, Schweiz SCHOELLER, Miss J. — Centre de Biol, anim., 40 Rue Lamartine, TALEN- CE (Gironde), France a. Facteurs de la differenciation des disques imaginaux de la tete. Calli- phora spec, Sarcophaga spec. (Diptera) b. Formation de la tete imaginale. Calliphora spec. (Diptera) SCHOLTEN, F. C. — Anat.-Embryol. Lab., Free Calvinistic Univ., Pr. Hendriklaan 27, AMSTERDAM Z, Holland a. The influence of hypoxaemia during gravidity on the development o£ the cerebellum of the foetus. Rattus norvegicus (Rodentia) (in collabo- ration with F. Van FAASSEN and F. ST AM) SCHOTT, J. Lie. es Sci. — Lab. de Zool. et d'Embryol. exper., Inst, de Zool. et de Biol, gener.. 12 Rue de I'Universite, STRASBOURG, France a. Morphogenese et physiologie embryonnaire des glandes endocrines. (Selachii. Teleostei) (en collaboration avec J. VIVIEN et R. RECHEN- MANN) b. Analyse du processus de regulation et de paragenese. (Selachii) (en collaboration avec Miss D. HAY et J. H. VIVIEN) SCHOTTE, O. E. Dr, M.I. I.E.. Prof. — Dept of Biol., Amherst Coll., AMHERST, Mass.. U.S.A. SCHREIBER, B. M.I.I.E., Prof. — 1st. di Zool. e Anat. comp., Universita. PARMA, Italia a. Chemistry of the bone-inducing substances in bone extracts. (Amphibia), Gallus domesticus (Aves) b. Induction in in vitro cultured tissues. (Amphibia). Gallus domesticus (Aves) SCHREIBER G. Ph.D., Prof. — Inst, de Biol., Fac. Filosofia, Univ. de Minas Gerais, Caixa Postal 253, BELO HORIZONTE, M.G., Brasil 97 Schrcibcr-Sha a Quantitative cytology: nuclear size and number of ..nucleolar units". Bufo spec. (Anura), Gallus spec. (Aucs), Mus rattus (Rodentia) h Interscxualitv Bothrops insularis Amand (Ophidia) (in collaboration with A. HOGE, Sao Paulo and H. BELLVOMINI. Sfio Paulo) SCHREURS A F. B.Sc. — Hubrecht Lab.. Intern. Embryol. Inst., Jans- kerkhof'2. UTRECHT. Holland a. Analysis of competence of ectoderm for neural induction with various experimental techniques. Ambystoma mexicanum (Urodela) b. Interaction of patterns in neural plate and underlying archenteron roof after rotation of the neural plate through 180°. Ambystoma mexicanum (Urodela) SCHRODER, R. K. P. Dr Med. — Anat. Inst, der Univ. Hamburg, Schott- miillerstr. 1, HAMBURG 20. Deutschland — z.Zt. Altonaer Krankenhaus. Abt. f. innere Medizin. HAMBURG a. Fetal membranes. NANCY, France SCHWANDER, J. — Lab. de Physiol. Gener., 30, Rue Sainte-Catherine, a. Recherches experimentales sur la chronologic du developpement biochi- mique au niveau de I'cncephale. Gallus domesticus (Aves) (en collabora- tion avec J. F. GAYET) SCHWARTZ, V. Dr — Max Planck-Inst. fiir Biol.. Spemannstr. 34. TUBINGEN. Deutschland a. Ontogenese des Fliigelmusters. Plodia spec. (Lepidoptera) SEDRA. S. N. B.Sc. M.Sc, Ph.D., F.Z.S. — Dept of Zool.. Alexandria Univ.. Moharram Bey. ALEXANDRIA, Egypt a. Stages in normal development. Bu[o regularis (Anura) b. Seven interesting abnormal urostyles. Bu[o regularis (Anura) c. The development of the nasal capsules. Bu[o regularis (Anura) (in colla- boration with M. I. MICHAEL) d. The ontogenesis of the vertebral column. Bu[o regularis (Anura) (in col- laboration with A. A. MOURSI) e. The structure of the hyobranchial apparatus of the tadpoles. Bufo regu- laris (Anura) (in collaboration with M. I. MICHAEL) f. The development of the columella auris. Bu[o regularis (Anura) (in collaboration with M. I. MICHAEL) SEGAL. S. J. M.S., Ph.D., M.I. I.E. — Population Council, Rockefeller Inst. for Med. Research, 66th St and York Ave, NEW YORK 21, N.Y., U.S.A. SEHE. Ch. T. — Dept of Zool., Univ. of Illinois, URBANA, 111., U.S.A. SEIDEL. F. DrPhil.. o.Prof. — Zool. Inst, der Univ., Ketzerbach 63, (16) MARBURG/Lahn, Deutschland a. Morphologische und physiologische Untersuchungen an der embryonalen Entwicklung. Oryctolagus cuniculus (Lagomorpha) , Mus musculus (Ro- dentia) b. Morphologische und physiologische Untersuchungen an der embryonalen Entwicklung. Platycnemis spec. Calopteryx spec. (Odonata), Gryllus spec, Dixippus spec. (Orthoptera) , Apis spec. (Hymenoptera) , Droso- phila spec. (Diptera) . Ascaris spec. (Nematoda) SELMAN, G. G. Ph.D. — Inst, of Animal Genet., Univ. Dept of Genet., King's Buildings, West Mains Rd, EDINBURGH 9, Scotland a. Study of the effects of destroying the primary organisation of mosaic and regulation eggs by ultrasonic treatment. (Invertebrata) 98 b. Some measurements of morphogenetic forces and the mechanical proper- ties of the tissue concerned. (Amphibia) c. Study of certain features of developing embryos using electron-micro- graphs of ultrathin sections and cytochemical techniques. Drosophila melanogaster (Diptera), (Amphibia) (in collaboration with C. H. WADDINGTON and Miss M. M. PERRY) SEMBRAT, K. Ph.D.. D.Sc. Prof. — Zaklad Zool. Ogolnej. Inst. Zool., Uniw. we Wroclawiu. ul. Sienkiewicza 21. WROCLAW. Poland a. Descriptive and experimental embryology. Sagartia leucolena Verril (Anthozoa) b. Localization of the primary gonocytes in the early gastrula. (Amphibia) c. The morphogenetical functions of the thyroid gland and hypophysis. (Pisces, Amphibia, Reptilia, Aves) d. Regulation and regeneration of the primary optic vesicle. Triturus spec. (Urodela) SEMBRATOWA. Mrs Z. OPOCZYnSKA M.D.. Prof. — Zaklad Histol. i Embryol., Akad. Medycznej. Chalubinskiego 6a. WROCLAW. Poland a. Regulation and regeneration of the primary optic vesicle. Triturus spec. (Urodela) SENGEL. Ph. Lie. es Sci. — Lab. d'Embryol. exper. du Coll. de France, et Lab. d'Embryol. et de Teratol. exper. du C.N.R.S., 11 Place Marcelin Berthelot. PARIS Ve. France a. Pigmentation de la peau d'embryon cultivee in vitro sur milieux naturels et synthetiques. Gallus gallus (Aves) b. Analyse in v i t r o des roles du derme et de I'epiderme dans la diffe- renciation des germes plumaires chez I'embryon. Gallus gallus (Aves) SENO, T. — Dept of Anat.. School of Med., Gunma Univ., MAEBASHI, Japan a. Origin of the ventral body-wall. Gallus domesticus (Aves) b. Cartilage forming capacity of somite cells. Gallus domesticus (Aves) SENSENIG, E. C. B.A., M.S.. Ph.D.. Prof. — Univ. of Alabama. Med. Center. BIRMINGHAM 5, Alabama. U.S.A. SETO. H. Prof. — Anat. Lab.. Tohoku Univ., SENDAI, Japan (no embryological work in progress) SETTLE. G. W. A.B.. M.D. — Dept of Embryol.. Carnegie Inst, of Wash- ington, Wolfe and Madison Sts. BALTIMORE 5. Md, U.S.A. a. Anatomy of club-foot deformities (particularly talipes equinovaris) in the fetus. Homo sapiens (Primates) SEVKET GIZ, F. Dr, Prof. — Zooloji Enstitiisu, Suleymaniye-Miiftuluk. ISTANBUL. Turkey SHAFIQ, S. A. M.Sc. D.Ph. — Dept of Zool., Dacca Univ., DACCA, Pakistan SHANER, R. F. Ph.D., F.R.S.C, Prof. — Dept of Anat.. Univ. of Alberta. Med. School. EDMONTON. Alberta. Canada a. A study of abnormal hearts in embryos corresponding to the third month of human development. Sus scrofa (Artiodactyla) b. Study of a collection of abnormal embryos of an age correponding to the third month of human development with the aim of throwing light on the development of various human abnormalities. Sus scro[a (Artiodac- tyla) c. Development of abnormal pulmonary and aortic valves. 99 Sha-Sir SHANNON. J. E. - Med. Coll., Cornell Univ.. NEW YORK, N.Y., U.S.A. a. Factors affecting reaggregation and segregated cells in tissue culture. SHAVER, J. R. A.B., Ph.D. — Zool. Dept. Michigan State Univ., EAST LANSING, Mich., U.S.A. (no embryological work in progress) SHEN, S. C. Ph.D. — Osborn Zool. Lab., Yale Univ.. NEW HAVEN 1 1 , Conn.. U.S.A. a. Comparative cytochemistry of central nervous system. (Vertebrata) b. Cytochemical differentiation of the endplates. Ambystoma punctatum, Rana pipiens (Amphibia) SHIINO. S. M. B.Sc. D.Sc. — Zool. Inst., Fac. of Fisheries. Mie Prefect- ural Univ., TSU-CITY. Mie-Pref.. Japan a. On origin and fate of teloblasts. Goetice depressiis (Brachyura. Deca- poda). Eupagurus samuelis (Anomura, Decapoda) , Spirontocaris recti- rostris (Macrura, Decapoda) SHIN-IK£, T. — Osaka Dental Coll., HIRAKATA CITY, Osaka-Pref.. Japan gaster (Urodela) a. Factors in the morphogenesis of the pronephric system. .Ti'iturus pyrrho- SHIOMI. T. — Zool. Inst., Fac. of Sci., Univ. of Kyoto, KYOTO, Japan a. Studies on the hereditary lethals. Drosophila spec. (Diptera) SHORT, B. F. M.Agr.Sci., Ph.D. — Div. of Animal Health and Production, C.S.I.R.O., Sheep Biol. Lab., Great Western Highway, (P.O. Box 144, Parramatta). PROSPECT, N.S.W., Australia a. Response to homologous antigens. Mus musculus, Ovis spec. (Mammalia) SHULOV. A. Dr Sc.Nat. — Dept of Zool.. Hebrew Univ., JERUSALEM, Israel a. Ecological conditions of development of eggs. Artificially induced inter- ruption of development (eggs) (The changes in yearly development cycles under influence of dryness or/and humidity). Calliptamus spec, Schistocerca gregaria, Locusta migratoria migratorioides, Nomadacris septemfasciata (Orthoptera) b. Protease of eggs. Correlation of the morphological changes in the embryo with appearance of protease. Schistocerca gregaria, Locusta migratoria migratorioides (Orthoptera) c. Structure of the chorion and the micropyle. Ymethis pulchripennis asia- ticus Uvarov (Orthoptera) SHUTE, C. C. D. M.A.. M.B., B.Chir. — Anat. School, Univ. of Cam- bridge. CAMBRIDGE. England SIDMAN. R. A.B.. M.D. — Section Devel. and Regen., Lab. of Neuroanat. Sci., NINDB, Nat. Inst, of Health, BETHESDA, Md. U.S.A. a. Tissue and organ culture in vitro, central and peripheral nervous system. (Aves. Mammalia) SIEGFRIED, J. — Inst. d'Anat., Fac. de Med., Univ. de Geneve, 20 Rue Ecole de Med., GENfiVE. Suisse a. Developpement du plexus solaire (plexus coeliacus). SIGOT. A. — Lab. de Biol, gen., Inst, de Zool. et de Biol, gen., Fac. des Sci.. 12 Rue de I'Universite. STRASBOURG, France a. Etude de la sensibilite hereditaire au gaz carbonique. Drosophila melano- gaster (Diptera) SIGOT. M. Lic.es Sci. — Lab. d'Embryol. exper. du Coll. de France, et Lab. d'Embryol. et de Teratol. exper. du C.N.R.S., 11 Place Marcelin Ber- thelot, PARIS Ve, France 100 a. Etude biochimique du developpement de I'intestin; constitution et fonc- tionnement enzymatique. Gallus spec. (Aues) SILeN, L. K. p. Fil.Dr, Prof. — Zootom. Inst., Univ. of Stockholm, 70A Radmansgatan, STOCKHOLM, Sweden SILVER, P. H. S. Ph.D. — Anat. Dept, Middlesex Hosp., Med. School. LONDON W. 1, England SIMON, Mrs D. Lie. es Sci. — Lab. de Zool. et d'Embryol. exper., Inst. de Zool. et de Biol, gener., 12 Rue de I'Universite, STRASBOURG, France a. Explantation in vitro de jeunes embryons et etude des besoins nutri- tifs necessaires a leur survie, leur differenciation et leur croissance par des aliments naturels et synthetiques entrant dans les milieux de culture. Gallus spec. (Aves) b. La localisation et la migration des cellules germinales aux premiers sta- des du developpement. Gallus spec. (Aves) SINCLAIR, J. G. B.S., M.S., Ph.D., Prof. — Dept of Anat., Med. Branch, Univ. of Texas, GALVESTON. Tex., U.S.A. a. Anterior cerebral nerve plexus in adult and fetus. Tursiops truncatus, Oryctolagus cuniculus, Mus musculus. Homo sapiens (Mammalia) b. Continued study of developmental anomalies. Brain. Heart. Mus muscu- lus. Homo sapiens (Mammalia) c. Continued study of transplacental effects of urethan. Mus musculus (Rodentia) d. Developmental pattern and mechanism of iris and ciliary body. Tursiops truncatus, Oryctolagus cuniculus, Mus musculus, Homo sapiens (Mam-- malia) SINGER, M. B.S.. A.M., Ph.D.. Prof. — Dept of Zool.. Cornell Univ.. ITHACA, N.Y., U.S.A. a. Introduction of chemicals directly into developing regenerates and tissues by means of a method of microin fusion. Triturus viridescens viridescens (Urodela) (Urodela) h. Electron microscopic studies of regenerates. Ambystoma punctatum c. The induction of regeneration in postmetamorphic animals by increase in nerve number. (Anura) SINGER, R. M.B.. Ch.B., F.R.A.I. — Anat. Dept, Med. School, Univ. of Cape Town, MOWBRAY, C.P.. South Africa a. Development of clavicle, humerus and femur. Homo sapiens (Primates) b. Factors producing ectopia vesicae. Homo sapiens (Primates) c. Factors producing renal agenesis. Homo sapiens (Primates) SINHA, A. B.Sc.(Hons) — Dept of Zoology. Presidency Coll., College St, CALCUTTA 12, India a. Cell transplantation and isolation. Hydra spec. (Coelenterata) (in colla- boration with S. MOOKERJEE) SIPPEL, T. O. A.B., Ph.D. — Dept of Anat., School of Med., Western Reserve Univ., CLEVELAND, Ohio, U.S.A. a. Energy metabolism of the developing lens. Rattus rattus (Rodentia) SIRAKAMI, K. I. M.A., Ph.D. — Biol. Dept, Yamanashi Univ., KoFU. Japan a. Cell division of isolated blastomeres. Triturus pyrrhogaster, Bufo vulgaris (Amphibia) garis (Anura) h. Normal Table on a cyto-embryological (cytometrical) basis. Bu[o vul- 101 Sir-Spr SIRIIN I L Dr Nat.Sci. — Inst, of Animal Genet., Univ. Dept of Genet.. 'Kind's Buildings, West Mains Rd. EDINBURGH 9, Scotland a. Differentiation' of protein and nucleic acids in embryos. (Diptera, Am- pfiibia. Aves) b Transfer of substances during induction. (Amphibia) (in collaboration with S. K. BRAHMA) c. Investigation of gametogenesis and of early embryonic development using radioactive tracers. Mus musculus (Rodentia) (in collaboration with R. G. EDWARDS) d Metabolism of radio-isotopes. Triturus spec. (Urodela) (in collaboration with C. H. WADDINGTON) SKINNER. J. H. M.Sc. — Zool. Inst., Univ. of Stellenbosch, STELLEN- BOSCH, South Africa a. Ontogenesis of the shoulder-girdle and sternum. Microsaura pumila (Laccrtilia) SKREB. N. M.D., D.Sc. — Inst, de Biol., Fac. de Med., Salata, ZAGREB, Yougoslavic a. Experimental studies on early development. 1. Intrauterine injections of isotonic solutions of LiCl. 2. Transplantation of the blastocyst in differ- ent transfer media (with LiCl). Rattus noruegicus albinus (Rodentia) (in collaboration with Miss B. LEVAK) SLABY, O. Dr, Dr. Prof. — Inst, of Histol. and Embryol., Fac. of Med.. Charles Univ., Karlovarska ul. 48. PLZEN, Czechoslovakia a. The development of the skull. (Amniota, including Homo sapiens) b. The development of the limbs. (Amniota, including Homo sapiens) c. The development of the nasal cavity. (Amniota, including Homo sapiens) SLADECEK. F. D.Sc. — Dept of Gener. and Exper. Zool., Zool. Inst, of Charles Univ., Vinicna 7, PRAHA II. Czechoslovakia a. Regulation of central nervous system in early development. Relations between morphological and functional regulation (development of moti- lity). Amby stoma mexicanum. Triturus taeniatus, T. alpestris (Urodela) b. Induction with haploid inductors in diploid hosts and vice versa. Am- bystoma mexicanum (Urodela) SLIJPER. E. J. Dr, Prof. — Zool. Lab. der Univ., Plantage Doklaan 44. AMSTERDAM C, Holland a. The embryonic bloodcirculation (ductus Botalli, ductus Arantii etc.) (Cetacea) SLIPKA, J. Dr. Dr — Inst, of Histol. and Embryol.. Fac. of Med.. Charles Univ., Karlovarska 48. PLZEN. Czechoslovakia a. The development of the branchial region. (Amniota. including Homo sapiens) h. The morphogenesis of the tongue from the standpoint of evolutionary morphology. (Amniota. including Homo sapiens) SMALL. Miss J. E. Ph.D. — Dept of Zoology. Yale Univ.. NEW HAVEN, Conn.. U.S.A. a. The capacity of tissue cells to differentiate after prolonged growth i n vitro. Gallus domesticus (Aves) SMET. W. M. A. De Lic.Zool.Sci. — Kasteellei 57. BRASSCHAAT. Bel- gium — Inst, de Zool.. Univ. de Louvain. 71 Rue de Namur. LOUVAIN. 102 a. Development of urogenital system. Polypterus spec. (Crossopterygii) SMITH. A. S. A.B. — Dept of Zool., Univ. of Calif.. LOS ANGELES 24. Cal., U.S.A. SMITH, Miss B. T. — Dept of Biol., Hamilton Coll., McMaster Univ., HAMILTON. Ontario, Canada SMITH, S. M.A.. Ph.D. — Univ. Museum of Zool., Univ. of Cambridge. Downing St, CAMBRIDGE, England SMITHBERG, M. Ph.D. — Roscoe B. Jackson Mem. Lab.. BAR HAR- BOR, Me. U.S.A. SMRECZYnSKI, S. Ph.D. — Zool. Dept of the Jagiellonian Univ., St Anne 6, KRAKOW, Poland (no embryological work in progress) SNELLEN, H. A. Med.Dr, Prof. — Anat.-Embryol. Lab. of the Univ. of Leyden, Wassenaarseweg, Boerhaavekwartier, LEIDEN, Holland a. Heart and vessels in congenital malformations. Homo sapiens (Prima- tes) (in collaboration with J. DANKMEIJER, Miss A. DEKKER and Miss H. C. van INGEN) SNOOK, T. B.S., M.S., Ph.D. — Dept of Anat., School of Med., Univ. of North Dakota, GRAND FORKS, N. Dak., U.S.A. (no embryological work in progress) SOBELS, F. H. Ph.D. — Genet. Inst, der Rijks Univ., Stationsstraat 9, UTRECHT, Holland SOBEY, W. R. Ph.D. — C.S.I.R.O. Anim. Gen. Sect., c/o Dept of Zool., Univ. of Sydney, SYDNEY. N.S.W. Australia SOUNHEIN, E. A.B. — Dept of Zool.. Univ. of Calif., LOS ANGELES 24, Cal., U.S.A. SPIEGEL, M. B.S., Ph.D. — Dept of Embryol.. Div. of Biol.. Cahf. Inst. of Technol., PASADENA 4. Cal., U.S.A. SPIRITO, A. Dott., M.I.I.E.. Prof. — 1st. di Biol, gen., Fac. di Med.. S. Pietro, PERUGIA. Italia a. Origine e natura dei tumori. Bu[o spec. (Anura) SPOFFORD. W. R. Ph. D.. Prof. — Dept of Anat., School of Med., State Univ. of New York, 766 Irving Ave, SYRACUSE 10, N.Y., U.S.A. a. Induction and determination in the neural plate. Ambystoma maculatum (Urodela) b. Experimental neurogenesis. Ambystoma maculatum (Urodela) SPRATT, Jr, N. T. A.B.. Ph.D.. M.I.I.E., Prof. — Dept of Zool., Coll. of Sci., Lit. and Arts, Univ. of Minnesota, MINNEAPOLIS 14, Minn., U.S.A. a. Investigating the nutrient requirements essential to morphogenesis and growth in the early stages of development (pre-streak and streak blasto- derms). Gallus domesticus (Aves) b. Survey of dehydrogenase enzymes in early embryos: 1. LocaUzation of enzyme activity, 2. Structural integrity and enzyme activity. Gallus domesticus (Aves) c. Regeneration. Planaria spec. (Turbellaria) , Tubularia spec. (Coelente- rata) d. Cytological study of the developmental center (organizer). Gallus do- mesticus (Aves) e. Analysis of mechanism of morphogenetic movements by time-lapse cine- matography. Gallus domesticus (Aves) 103 Spratt-Sto f. Analysis of dynamic population patterns (Pattern formation by free- swimming, ciliated and flagellated organisms). Tetrahymena spec, Euglcna spec. (Protozoa), Arbacia punctulata (Echinoidea) SRINIVASACHAR. H. R. B.Sc.(Hons), M.Sc. Ph.D. — Dept of Zool., Central College. BANGALORE 1. India a. Development of chondrocranium — basis for classification and evolution. (Pisces) b. Development of osteocranium — centres of ossification, etc. (Siluroidea) SRIVASTAVA. M. D. L. D.Sc. F.N.A.Sc. — Dept of Zool.. Allahabad Univ.. ALLAHABAD. India STAGNI. Miss A. M. — Lst. di Zool. Via S. Giacomo 9. BOLOGNA. Italia a. Regeneration. (Hydra) STAM, F. — Anat.-Embryol. Lab.. Free Calvinistic Univ., Pr. f-fendriklaan 27. AMSTERDAM Z. Holland a. The influence of hypoxaemia during gravidity on the development of the cerebellum of the foetus. Rattus noruegicus (Rodentia) (in collabo- ration with F. Van FAASSEN and F. C. SCHOLTEN) STARCK. D. Drmed., F.I.I.E., o. Prof. — Dr Senckenberg. Anat. Inst., Med. Fak. der Univ., Ludwig Rchnstr. 14, FRANKFURT, Main-Siid. Deutschland STARK, O. J. Dr rer.nat. — Zool. Inst, der Univ., Katharinenstrasse 20, FREIBURG i. Brsg.. Deutschland STEFAN. Miss Y. Lie. es Sci. — Lab. de Zool. et d'Embryol. e.xper., Inst. de Zool. et de Biol, gener.. 12 Rue de I'Universite, STRASBOURG. France a. Morphogenese du tractus genital et des gonades. Emys lepiosa (Chelo- nia). (Ophidia) (en collaboration avec J. H. VIVIEN) STEFANELLI. A. Dr. F.I.I.E.. Prof.ord. — 1st. di Anat. comp. ,.G. B. Grassi". Fac. di Sci., Univ. di Roma. Via Borelh 50, ROMA, Italia a. Histogenetic determination and differentiation of nervous cells. (Teleos- tei. Amphibia. Aves) h. Degeneration and regeneration of nervous cells. (Teleostei. Amphibia, Aves) c. Social behaviour of cultivated cells. (Amphibia, Aves) d. Correlated and partial movements of spermatozoa. (Amphibia, Aves) e. Cytochemistry of development and regeneration. (Amphibia, Aves) STEIN, Miss K. F. A.B.. M.S.. Ph.D. — Dept of Zool.. Mount Holyoke Coll.. SOUTH HADLEY. Mass.. U.S.A. a. Development of an abnormal homozygote due to the looptail gene (Lp). Mus musculus (Rodentia) b. Histochemical study of normal development and of the abnormal homo- zygote LpLp. Mus musculus (Rodentia) STEINBERG, D. M. Prof. — Zool. Inst, of the Acad, of Sci. of the U.S.S.R., Universitetskaja Nabereznaja 1, LENINGRAD 164, U.S.S.R. STEINBERG. M. S. B.A.. M.A.. Ph.D. — Dept of Embryol., Carnegie Inst, of Washington, Wolfe and Madison Sts. BALTIMORE 5. Md, U.S.A. a. Electrophoretic separation of living embryonic cells. Triturus pyrrhogas- ter (Urodela), Gallus domesticus (Aves) dela) b. Cellular interactions during differentiation. Triturus pyrrhogaster (Uro- 104 c. Chemically effected transformation of embryonic tissues. Triturus pyr- rhogastec (Utodela) STEINER, H. Ph.D.. Prof. — Zool.-vergl. Anat. Inst.. Naturw. Fak.. Univ. Ziirich, Kiinstlergasse 16, ZURICH 6, Schweiz STEINITZ, H. Ph.D. — Dept of Zool., Hebrew Univ., JERUSALEM, Israel a. Regeneration of retina from pigment epithelium. (Urodela) h. Lens regeneration from iris. (Urodela) c. Histogenesis of retina in normal development and regeneration. (Am- phibia) STENGER— HAFFEN, Mrs K.E. Dr es Sci. — Lab. d'Embryol. exper. du Coll. de France, et Lab. d'Embryol. et de Teratol. exper. du C.N.R.S., 1 1 Place Marcelin Berthelot, PARIS Ve, France a. Etude du developpement et de la regression du mesonephros. Gallus spec. (Aves) b. Recherches sur la dif ferenciation in vitro des gonades embryonnai- res. (Aves) (en collaboration avec Et. C. WOLFF) c. Recherches sur les besoins nutritifs des gonades embryonnaires en culture in vitro. (Aves) STePHAN, Fr. Dr es Sci. — Lab. de Zool. et d'Embryol. exper., Inst, de Zool. et de Biol, gener., 12 Rue de I'Universite. STRASBOURG, France a. Formation du systeme vasculaire extraembryonnaire et son extension. Developpement du coeur et des gros troncs arteriels de I'embryon, Gal- lus gallus (Aves) b. Etude experimental des anomalies et des suppleances vasculaires dans I'aire extraembryonnaire et I'embryon. Gallus gallus (Aves) STePHAN-DUBOIS, Mrs Fr. Dr es Sci. — Lab. de Zool. et d'Embryol. exper., Inst, de Zool. et de Biol, gener., 12 Rue de I'Universite. STRAS- BOURG, France a. Migration et differenciation des cellules de regeneration. (Planatiidae d'eau douce. Oligochaeta microdrila, Polychaeta errantia) STEPHENSON, N. G. M.Sc, Ph.D. — Zool. Dept, Univ. of Sydney, SYDNEY. Australia STEVENS, L. Ph.D. — Roscoe B. Jackson Memorial Lab., BAR HARBOR, Me, U.S.A. a. Histogenesis of testicular teratoma (strain 129). Mus musculus (Roden- tia) b. Study of a genetic defect affecting blood formation, body size and tail morphogenesis. Mus musculus (Rodentia) STINSON, B. D. B.S., M.S. — Dept of Zool.. Columbia Univ.. Broadway and 116th St, NEW YORK 27, N.Y., U.S.A. a. The influence of thyroid function on the radiosensitivity of the regenerat- ing forelimb of larvae. Ambystoma opacum (Urodela) b. The influence of cysteine on the suppression of regeneration capacity in larvae by x-irradiation. Desmognathus fuscus, Ambystoma opacum, A. tigrinum, A. maculatum (Urodela) c. An experimental analysis of x-ray-induced digit regression in intact fore- limbs of the adult animal. Triturus viridescens (Urodela) STOCK, A. D.PhiL, Ph.D. — Dept of Zool., Univ. of New England, AR- MIDALE. N.S.W., Australia 105 Stock -Sz€ a Rcqcneration and the endocrine system. Blattella germanica (Dictyopte- ra.^ Insccta) (in collaboration with A. F. O'FARRELL and Miss J. STOCKARD. A. H. Ph.D. — Dept of Zool.. Univ. of Michigan, ANN ARBOR. Mich.. U.S.A. a. Normal embryology. Percina caprodes (Percoidea, Teleostei). Necturus maculosus (llrodda) STONE L S Ph D F.I. I.E.. Prof. — Anat. Dept, School of Med.. Yale Univ.. 333 Cedar St. NEW HAVEN 11. Conn., U.S.A. — Osborn Zool. Lab., Yale Univ., NEW HAVEN 11. Conn.. U.S.A. a. Regeneration of retina, iris and lens from retina pigment cells. (Urodela) b. Factors controlling the inhibition and release of lens regeneration. (Urodela) c. Tissue culture studies of lens regeneration from the iris. (Urodela) d. Tissue culture studies of retina pigment cells. (Urodela and Mammalia) e. Development of vision in transplanted eyes. (Urodela) STOUT. Miss V. M. M.Sc. Ph.D. — Dept of Zool.. Canterbury Univ. Coll.. CHRISTCHURCH. New Zealand a. Descriptive embryology. Lepidurus apus (Notostraca, Crustacea) b. Descriptive embryology. Daphnia magna (Cladocera. Crustacea) STRAHAN, R. M.Sc. — Dept of Zool.. Univ. of Hong Kong, HONG KONG (no embryological work in progress) STRAUSS, F. M.D. — Anat. Inst.. Biihlstr. 26. BERN, Schweiz a. The oviduct during the passage of the egg. (Mammalia) b. Comparative implantation. (Mammalia) STROfiVA, Miss O. G. Cand.Biol.Sci. — Inst, of Animal Morphol. of the Acad, of Sci. of the U.S.S.R., Bolshaja Kalushskaja 33. MOSCOW V-71, U.S.S.R. a. Analysis of the capacity of the eyes of adult animals to regenerate the retina. Bombina bombina (Anura), Rattus norvegicus (Rodentia) h. Analysis of the conditions of embryonic segregation of the eye rudiment. Rattus norvegicus (Rodentia) c. The action of certain substances on the capacity of parts of the eye of transformations, especially of pigment epithelium into retina, in tadpoles. Rana arvalis, Pelobates fuscus etc. (Anura) STRUDEL, G. Dr es Sci. — Lab. d'Embryol. exper. du Coll. de France, et Lab. d'Embryol. et de Teratol. exper. du C.N.R.S., 11 Place Marcclin Berthelot. PARIS Ve, France a. La differenciation sexuelle, par les methodes de gretfes, de castration, d'injections d'hormones et d'explantations. Differenciation normale et inversion sexuelle des gonades, des voies genitales et des caracteres somatiques precoces. Callus spec. Anas spec. (Aves) (en collaboration avec Et. C. WOLFF, Mrs D. SCHEIB— PFLEGER, Miss B. SALZ- GEBER and A. HAMPfi) STUART. E. G. Dr — Dept of Anat., School of Med., Univ. of Pennsyl- vania, PHILADELPHIA 4, Pa, U.S.A. STUCHLY. Z. Dr, Prof. — ZaWad Biol. Ogolnej, Akad. Med., ul. Buj- wida 9. WROCLAW, Poland a. Influence of blockade of the reticulo-endothelial system on metamorphosis (Amphibia) 106 STULTZ, W. A. B.A.. Ph.D. — Dept of Anat., Coll. of Med.. Univ. of Vermont, BURLINGTON. Vt. U.S.A. a. Studies on the structure and function of the spinal cord, trunk and limbs following removal or transplantation of central nervous tissue. Ambys- toma punctatum (Urodela) b. Limb development and function following reciprocal transplantations of brachial and lumbo-sacral cord segments. Ambystoma punctatum (Uro^ dela) c. A comparison of the effects following reversal of the brachial and lumbo- sacral cord segments. Ambystoma punctatum (Urodela) SUGINO, H. D.Sc. Prof. — Osaka Lib. Arts Univ., Hirano. Higashi- sumiyoshiku. OSAKA. Japan a. Transplantation experiments. Dugesia gonocephala (Tricladidea) SUGIYAMA. M. M.A.. D.Sc. — Marine Biol. Station, Nagoya Univ., Sugashima-cho. TOBA. Mie-ken. Japan a. Physiological studies on fertilization and artificial parthenogenesis. Hemicentrotus pulcherrimus, Pseudocentrotus deptessus (Echinoidea) (in collaboration with M. ISHIKAWA) SUKIRNA, M. Prof. — Fakultas Kedokteran, Universitas Indonesia. Bag. Ilmu Djaringan Tubuh. Salemba no. 6. DJAKARTA. Indonesia SULLIVAN. G. E. M.Sc. — Dept of Zool., Univ. of Sydney, SYDNEY, N.S.W.. Australia SUNDELL, L.-E. Fil.mag. — Inst, for Zoophysiol., Uppsala Univ., UPP- SALA, Sweden a. Physiological and chemical studies in yolk. (Pisces, Amphibia) SUNDELI^THORSELL, Mrs G. Fil.Kand. — Inst, for Zoophysiol.. Upp- sala Univ.. UPPSALA, Sweden a. The primary sex rate. (Mammalia) (in collaboration with P. E. LIN- DAHL) SWANN. M. M. M.A., Ph.D., Prof. — Dept of Zool.. Univ. of Edinburgh, West Mains Rd. EDINBURGH 9. Scotland a. Fertilization and cleavage. (Echinoidea) h. Division and growth in micro-organisms. SWARTZ, G. E. B.A., M.A.. Ph.D. — Dept of Biol.. Univ. of Buffalo, BUFFALO 14, N.Y.. U.S.A. SZARSKI, K. W. Ph.D. — Zaklad Anat. Porownawczej, Inst. Zool. Uniw., ul. Sienkiewicza 21, WROCLAW, Poland a. Development of the kidneys. (Teleostei, Anura) b. Development of genital tracts and accessory glands. (Chiroptera) SZeKELY, G. M.D. — Dept of Anat., Univ. Med. School, Dischka u 5, PeCS, Hungary a. Investigations on the functional specificity of transplanted sensory gang- lia of cranial nerves. Pleurodeles Waltlii, Triturus vulgaris (Urodela) b. Early function of the pituitary gland during development. Especially start of adrenalocorticotrophic activity. Gallus domesticus (Aves) SZENTAGOTHAI, J. M.D., Prof. — Dept of Anat., Univ. Med. School, Dischka u 5, PeCS, Hungary a. Analysis of spontaneous activity of transplanted larval spinal cord neu- rons. Especially effect of synapse-inhibitors (cholinesterase inhibitors, etc.) on impulse transmission in the grafted nervous tissue. Pleurodeles Waltlii, Triturus cristatus (Urodela) 107 Tah Tho TAHARA. Y. Lab. of Morphol.. Osaka Lib. Arts Univ.. IKEDA. Osaka- Prcf.. Japan a. Analysis of the determination of the lens. (Amphibia) TAHMISIAN T. N. B.A.. M.S.. Ph.D. — Argonne National Lab., P.O. Box 299. LEMONT. 111.. U.S.A. a. Effects of ionizing irradiations on tissue differentiation and metabolism in embryos. Mclanoplus diffcrcntialis differentialis Thomas (Orthoptera) b. Dose rate effect upon teratogenesis. Mclanoplus differ entialis differen- tialis Thomas (Orthoptera) c. Organelle induction and differentiation in spermatogenesis as effected by X irradiation. Melanoplus differentialis differentialis Thomas (Ortho- ptera) TAKAMI. T. — Dcpt of Phvsiol., Sericult. Expcr. Stat.. Koenji, Suginami-ku. TOKYO. Japan a. Embryology with special reference to the dormancy and activation of the hibernating egg. Bombyx mori L. (Lepidoptera) b. Tissue culture and in vitro studies on the embryo, yolk cell and other egg components. Bombijx mori L. (Lepidoptera) ■ TAKAMOTO. K. M.Sc. — Lab. Exper. Embryol.. Inst, of Polytechn.. Osaka City Univ., Minami-Ogimati. Kita-ku, OSAKA, Japan TAKATA. Miss C. B.Sc. M.A. — Biol. Inst., Fac. of Sci., Nagoya Univ.. Chigusa-Ku. NAGOYA. Japan a. The effect of mesoderm and mesectoderm on the differentiation of isola- ted areas of the cndodcrm of the neurula. Triturus spec. (Urodela) {in collaboration with T. YAM AD A) TAKATA. K. M.A. — Biol. Inst.. Fac. of Sci., Nagoya Univ., Chigusa-Ku, NAGOYA. Japan a. Studies on the ribonucleoproteins isolated from various tissues. (Mam- malia) (in collaboration with S. OSAWA) b. Isolation of the bone marrow factor which is responsible for induction of mesodermal structures in the ectoderm of the gastrula. (Amphibia, Mammalia) (in collaboration with S. OSAWA and T. YAMADA) TAKAYA. H. Ph.D.. M.I.I.E.. ProL — Biol. Lab.. Dept of Sci.. Konan Univ., KOBE. Japan a. Regional differentiation of the central nervous system. Triturus spec, Hynobius spec. Bufo spec, Rana spec. (Amphibia) b. Production of situs inversus viscerum. Triturus spec, Hynobius spec, Rana spec. Bufo spec. (Amphibia) c Thermal influence upon the development of early embryo. Triturus spec, Hynobius spec, Bufo spec, Rana spec. (Amphibia) TAKEUCHI. K. B.Sc. M.A. — Biol. Inst., Fac. of Sci., Nagoya Univ.. Chigusa-Ku. NAGOYA. Japan a. Necessary substances for egg formation and development. Oryzias lati- pes (Teleostei) TAKISAWA. A. B.M.. M.D.. Prof. — Anat. Inst.. Gunma Univ.. MAE- BASHI. Japan a. The skeletal muscles in the course of metamorphosis. Bufo vulgaris (Anura) ra), (Mammalia) b. Histochemical study on the retina in development. Bufo vulgaris (Anu- TALBERT. G. B. B.S.. M.A.. Ph.D. — Dept of Anat., Coll. of Med.. State Univ. of New York. 350 Henry St. BROOKLYN, N.Y.. U.S.A. 108 TAMANOI, I. M.Sc. — Dept of Biol.. Fac. of Sci.. Kyushu Univ.. FU- KUOKA, Japan a. Analysis of the organizing substances by means of immunological me- thods. (Amphibia, Mammalia) TARDENT, P. Dr — Stazione Zool., NAPOLI, Italia TARNUS. J. L. — Lab. d'Anat., Fac. de Med. de Paris, 45 Rue des Sts Peres, PARIS Vie, France a. Developpement du sympathique cervical. Homo sapiens (Primates) (en collaboration avec G. H. G. OLIVIER) TARTAR, V. Ph.D. — Dept of Zool., Univ. of Washington. SEATTLE 5. Wash.. U.S.A. TAVARES DE SOUSA, A. Dr. Prof. — Inst, de Histol. e Embryol., Fac. de Med., COIMBRA, Portugal (no embryological work in progress) TEIXEIRA. Mrs I. — Inst, de Histol. e Embriol., Fac. de Med., Avenida 28 de Maio. LISBOA. Portugal a. Development of the area postrema. Gallus domesticus (Aves) TEMPLETON, M. A.B. — Dept of Anat.. Med. School. Univ. of Kansas, LAWRENCE, Kansas, U.S.A. a. Microchemical study of glycogen in normal and aneurogenic limb muscle of the developing animal. Gallus domesticus (Aves) (in collaboration with B. S. WENGER) TENCER, Miss R. Lie. en Sci. — Lab. de Morphol. anim., Univ. libre de Bruxelles, 1850 Chaussee de Wavre, BRUXELLES-Auderghem, Bel- gique a. Synthesis of DNA. (Aves) b. Neural induction and precytolysis. Ambystoma spec. (Urodela) c. Metabolism during gastrulation. Ambystoma spec. (Urodela) TE WINKEL, Miss L. E. A.B.. A.M., Ph.D. — Dept of Zool.. Smith Col- lege, NORTHAMPTON, Mass.. U.S.A. THEILER, K. Dr Med. — Anat. Inst, der Univ.. Gloriastr. 19, ZORICH. Schweiz THIEBOLD. J. J. Lie. es Sci. — Lab. de Zool. et d'Embryol. exper.. Inst, de Zool. et de Biol, gener.. 12 Rue de I'Universite, STRASBOURG. France a. Morphogenese des gonades et du tractus genital. (Selachii, Teleostei) (en collaboration avec J. H. VIVIEN et Th. MOHSEN) THILLARD. Miss M. J. Lie. Ing.Chim. — Lab. de Biol. Anim.. Pavilion Curie. Univ. de Paris. 12 Rue Cuvier. PARIS Ve, France a. Growth of nerve fibres. Gallus domesticus (Aves) b. Development of epiphysis. Gallus domesticus (Aves) THOMASON, Miss D. M.A., Ph.D. — Tissue Culture Lab., Christie Hosp. & Holt Radium Inst., Withington, MANCHESTER 20, England a. The effects of ionizing radiations on developing embryos. Xenopus /ae- vis (Anura) THOMPSON, A. P. D. B.Sc, M.B., Ch.B. — Dept of Anat., Med. School, Birmingham Univ.. Edgbaston, BIRMINGHAM 15. England (no embryological work in progress) THOMPSON. T. E. B.Sc. — Dept of Zool., Univ. Coll. of North Wales, BANGOR, Caernarvonshire, N. Wales a. Life histories. (Opisthobranchiata) 109 Thompson- Tur b. The embryology, larval ecology and metamorphosis of a littoral Dorid Nudibranchiate species, with special reference to the phenomena asso- ciated with the euthyneurous tendencies displayed in present-day Opis- thobranchs. Adalaria proxima Alder & Hancock (Polyceridae, Opistho- branchiata) THORNTON. C. S. A.B., M.A., Ph.D. — Kenyon College, GAMBIER. Ohio. U.S.A. a. Effect on limb regeneration of apical epidermal cap inactivation by ultra- violet light. Ambystoma talpoideum, A tigrinum (Urodela) b. Analysis of the manner in which transplanted body skin inhibits limb regeneration. Ambystoma tigrinum, A. talpoideum (Urodela) THURMOND, W. A.B.. M.A. — Biol. Sci. Dept. Calif. State Polytechnic College. SAN LUIS OBISPO. Cal., U.S.A. a. The determination of onset of intermedin production and secretion. Hyla Regilla (Anura) b. Factors controlling the differentiation of the pars intermedia, homoplasti- cally transplanted into albino larvae. Hyla Regilla (Anura) c. The determination of onset of production and secretion of a melano- phore-stimulating substance produced by the neurohypophysis. Hyla Regilla (Anura) TIEDEMANN. H. Dr med.. Dr rer.nat.. Dr habil. — Heiligenberg-Inst., (17b), HEILIGENBERG. Kreis Ueberlingen Bodensee, Deutschland a. Chemische Physiologie der Entwicklung. (Amphibia) TIEDEMANN— WAECHTER. Mrs H. Dr rer.nat. — Heiligenberg-Inst., (17b) HEILIGENBERG, Kreis Ueberlingen Bodensee, Deutschland a. Chemische Physiologie der Entwicklung. (Amphibia) TIMMERMANS, C. J. — Genet. Inst, der Rijks Univ., 5e Binnenvestgracht 8. LEIDEN, Holland a. Abnormal imaginal development by ultrasonic treatment of embryo. Dro- sophila melanogaster (Diptera) TISNA-AMIDJAJA, D. A. Dr rer.nat. — Fak. Ilmu Pasti dan I. Alam, Bagian Zoology, Djl. Taman Sari 64, BANDUNG, Indonesia a. Standard food and growth curve. Rhacophorus leucomystax, Bufo mela- nostictus (Anura) leucomystax (Anura) h. Hybridization between the striped and non-striped variety. Rhacophorus TIXIER— VIDAL, Mrs A. — Lab. d'Histophysiol., Coll. de France, Place Marcelin Berthelot, PARIS Ve, France a. Differenciation de la thyroide embryonnaire en culture d'organe (metho- de de WOLFF). Gallus domesticus (Aves) h. Apparition de la fonction thyreotrope dans I'hypophyse embryonnaire (etude e.xperimentale). Gallus domesticus (Aves) TOIVONEN, S. I. Ph.D.. F.I. I.E., Prof. — Zool. Lab., Univ. of Helsinki, P. Rautatiekatu 13. HELSINKI, Finland a. The specific action of heterogenous inductors. Triturus spec. (Urodela) h. Thyroid gland and adenohypophysis in normal and delayed metamor- phosis. Xenopus laevis (Anura) (in collaboration with L. O. SAXeN) c. Induction of mesoderm by killed inductors. Triturus spec. (Urodela) d. The inductive action of malignant tumors. Triturus spec. (Urodela) (in collaboration with L. O. SAXeN) TOMITA, H. B.Sc, M.A. — Biol. Inst.. Fac. of Sci., Nagoya Univ.. Chi- gusa-Ku, NAGOYA, Japan 110 a. Melanin formation in color phenotypes. Oryzias latipes (Teleostei) (in collaboration with T. YAMAMOTO and T. HISHIDA) b. Melanin formation. Rhacophoms schlegeli var. arborea (Anura) TOMLINSON. J. D. W. M.A.. M.B.. B.Chir. — Anat. Dept, London Hosp. Med. Coll.. Turner St, LONDON E. 1, England TONDURY. G. F.LLE.. Prof. — Anat. Inst, der Univ., Gloriastrasse 19, ZORICH. Schweiz TORREY. T. W. Prof. — Dept of Zool., Indiana Univ., BLOOMING- TON, Ind.. U.S.A. TRACY. H. C. Ph.D.. Prof. (Emer.) — Dept of Anat.. Med. School, Univ. of Kansas, LAWRENCE, Kansas, U.S.A. a. Development of the nervous system in relation to behaviour. Opsanus tau (Pisces) b. Physiological stages in development. Opsanus tau (Pisces) TRAMPUSCH, H. A. L. Ph.D., M.I. I.E. — Anat.-Embryol. Inst.. Munici- pal Univ. of Amsterdam, Mauritskade 61. AMSTERDAM O. Holland a. Studies concerning the effect of X-rays on embryonic development. Con- tinuation of earlier experiments. (Urodela) h. Experiments designed to test relations of some inhibitors of embryonic development to the effect of X-rays. (Urodela, Rodentia) (in collabo- ration with J. van der BORDEN) c. Attempts to analize the differences in regenerative capacity between Amphibia and Mammalia. Amby stoma spec. (Urodela), Mus spec. (Ro- dentia) (in collaboration with D. J. JOCHEMS) d. Studies aimed to investigate some inductive effects on regenerative blastemata. Ambystoma mexicanum (Urodela) TRINKAUS. J. P. M.A.. Ph.D. — Josiah Willard Gibbs Research Lab.. Yale Univ., NEW HAVEN, Conn.. U.S.A. TRUSLOVE, Miss G. M. B.Sc, Ph.D. — Dept of Genetics. Univ. Coll. London, Gower St. LONDON W.C. 1. England a. Developmental genetics of skeletal mutants. Mus musculus (Rodentia) TSCHUMI, P. A. Dr — Anat. School. Univ. of Cambridge, CAMBRIDGE, England TUCHMAN-DUPLESSIS. H. M.I.I.E. — 67 Avenue Raymond Poincare. PARIS. France TUCKER, R. D.V.M. — Dept of Vet.Anat. and Parasitol.. School of Vet. Sci.. Univ. of Queensland. Fairfield Rd. Yeerongpilly. BRISBANE. Queensland. Australia a. Crinogenesis of the salivary glands. Gallus domesticus, Cavia cobaya. Bos taurus (Amniota) b. Histogenesis of the digestive tract. Bos taurus ( Artiodactyla) TUFT, P. H. M.A.. Ph.D. — Dept of Zool., Univ. of Edinburgh, West Mains Rd, EDINBURGH 9, Scotland a. Embryonic growth: cell number, mass, density, uptake and distribution of water. Rodnius spec. (Hemiptera) , Brachydanio rerio (Teleostei), Xenopus laevis (Anura) TUNG. T. C. Dr. F.I.I.E., Prof. — Lab. of Developm. Physiol.. Inst, of Exper. Biol.. Acad. Sinica. 865 Chang Ning Rd. SHANGHAI — Marine Biol. Lab.. TSINGTWO. China TURNER. C. J. B.Sc. — Anat. Dept. London Hosp. Med. Coll.. Turner St, LONDON E. 1, England 111 Tus-Vol TUSQUES. I. M. Dr en Med., Dr es Sci.. Prof. — Lab. d'Histol., Fac. dc Med., 16. Quai Moncousu, NANTES, France a. Analyse de Taction niorphogenetique de la thyroxine. Anguis [ragilis (Laccrtilia). Rattiis albiniis (Rodentia), Talpa Europaea (Insectivora) TWITTY V. C. Dr, F.I. I.E.. Prof. — Dept of Biol. Sci.. Stanford Univ., STANFORD, Cal.. U.S.A. TYLER A. Ph.D.. F.I. I.E.. Prof. — Dept of Embryol., Div. of Biol., Calif. Inst, of Tcchnol.. PASADENA 4, Cal.. U.S.A. a. Physiology of fertilization. (Echinoidea) b. Physiology of early development. (Echinoidea, Polychaeta) c. Life-span, motility and metabolism of spermatozoa. (Echinodermata, Annelida. Mollusca, Aves, Mammalia) d. Immuno-embryology. (Echinodermata etc.^ UBBELS, Miss G. A. M.Sc. — Centrum voor Electronenmicroscopie, Jans- kerkhof 3, UTRECHT, Holland UBISCH, L. V. Dr jur. et phil.. F.I.I.E.. Prof. (Emer.) — PARADIS. Norge no embryological work in progress) ULRICH, H. Dr phil., Prof. — Zool. Inst., Eidg. Technische Hochschulc. Universitatsstr. 2, ZURICH, Schweiz a. Action of X-rays on nucleus and cytoplasm of eggs, and on embryolo- gical stages. Drosophila melanogaster (Diptera) URBANI, E. Lib.Doc, M.I. I.E. — 1st. di Anat. comp. dell'Univ., Fac. di Sci., Via Borelli 50, ROMA, Italia URBANI— MISTRUZZI, Mrs L. Dott. — 1st. di Anat. comp. delTUniv.. Fac. di Sci.. Via Borelh 50. ROMA. Italia VACEK, Z. MUDr — Embryolog. ustav lekafske fak. Univ. Karlovy. Al- bertov 4, PRAHA II, Czechoslovakia a. Development of the innervation of the gonads. Homo sapiens (Primates) b. Experimental analysis of the development of the autonomic nervous system. Gallus domesticus (Aves) VAHS. W. Dr Phil. — Zool. Inst, der Univ. Koln. Kerpenerstr. 13. KCLN- LINDENTHAL, Deutschland a. Die Beeinflussung der Leistungsspezifitat abnorraer Induktoren in der Entwicklung. (Amphibia) b. Histochemische Untersuchung der Induktionsvorgange. Triturus spec. (Urodela) c. Entwicklung unter dem Einfluss von Antimetaboliten. (Urodela) VAINIO, E. T. M.D. — Zool. Lab., Univ. of Helsinki. P. Rautatiekatu 13. HELSINKI, Finland a. Teratomas caused by xenoplastic transplantations of embryos and ger- minal layers. Xenopus laevis, Triturus spec. (Amphibia) b. The antigenicity of different germinal layers. Triturus spec. (Urodela) c. The immunological properties of experimental teratomas. Triturus spec. (Urodela) VAKAET, L. C. M.D. — Lab. of Anat.. Fac. of Med.. Univ. of Gent, Bylokekaai 1. GENT, Belgium VANDEBROEK, G. Dr Sc. Prof. — Lab. d'Embryol.. Inst, de Zool.. Univ. de Louvain. 71 Rue de Namur, LOUVAIN. Belgique VANDERHAEGE— HOUGARDY. Mrs F. Dr en Sci. — Lab. de Mor- phol. anim., Univ. libre de Bruxelles, 1850 Chaussee de Wavre. BRU- XELLES-Auderghem, Belgique 112 a. Nucleo-cytoplasmic relations in normal and tumour (Ascites) cells. VANNINI. E. Dr. M.I.I. E.. Prof. — 1st. di Zool. e Anat. comp., Via Uni- versita 4. MODENA, Italia a. Cycle of the nucleic acids and nucleolar changes during .oogenesis. ( Echinodermata, Pisces, Amphibia) b. Development of the gonads and their embryological relations with the cortico-adrenal blastema. (Amphibia. Aves, Mammalia) c. Experimental analysis of the causal development of the gonads. (Am- phibia) d. Experimental regeneration and genesis of the germ-cells. (Polychaeta) VENZKE. W. G. D.V.M., M.Sc, Ph.D. — Dept of Vet.Anat., Ohio State Univ., COLUMBUS 10. Ohio, U.S.A. a. Morphogenesis and physiology of pineal gland. (Aves) b. Morphogenesis and physiology of blood. (Aves) c. Experimental morphology of pineal gland. (Bovidae, Mammalia) VERDONK, N. H. B.Sc. — Zool. Lab. der Rijks Univ., Janskerkhof 3, UTRECHT. Holland a. Cell-lineage in normal and Li-treated embryos. Limnaea stagnalis (Gas- tropoda) VEREJSKAJA, Miss V. N. Cand.Biol.Sci. — Inst, of Animal Morphol. of the Acad, of Sci. of the U.S.S.R., Bolshaja Kalushskaja 33. MOSCOW V-71, U.S.S.R. L. (Lepidoptera) a. Influence of high temperatures on developmental processes. Bombyx mori h. Analysis of sterihzing effect of sublethal high temperatures on eggs infected with Nosema bombycis. Bombyx mori L. (Lepidoptera) (in col- laboration with Mrs T. A. BEDNJAKOVA) VILLAFRANCA, G. W. de Ph.D. — Dept of Zool.. Smith College. NORTHAMPTON, Mass., U.S.A. VINTEMBERGER, P. Dr Med.. Prof. — Inst. d'Embryol., Fac. de Med.. 1 Place de I'Hopital. STRASBOURG, France a. Recherches sur le determinisme de la symetrie bilaterale chez les Verte- bres. (Amphibia, Aves) VIVIEN. J. H. Dr es Sci.. Prof. —Lab. de Zool. et d'Embryol. exper., Inst, de Zool. et de Biol, gener.. 12 Rue de I'Universite, STRASBOURG, France a. Morphogenese des gonades et du tractus genital. (Selachii, Teleostei) (en collaboration avec J. J. THIEBOLD et Th. MOHSEN) b. Morphogenese et physiologic embryonnaire des glandes endocrines. (Selachii, Teleostei) (en collaboration avec R. RECHENMANN et J. SCHOTT) c. Analyse du processus de regulation et de paragenese. (Selachii) (en collaboration avec Miss D. HAY et J. SCHOTT) d. Morphogenese du tractus genital et des gonades. Emys leprosa (Chelo- nia), (Ophidia) (en collaboration avec Miss Y. STEFAN) e. Origine de la lignee germinale. morphogenese et differenciation des go- nades. Xiphophorus Helleri, Lebistes reticulatus, Barbus spec. (Teleos- tei) (en collaboration avec E. FOLLENIUS) VOGEL, N. W. — Dept of Zool., Indiana Univ., BLOOMINGTON. Ind., U.S.A. VOLPE. E. P. Ph.D. — Dept of Zool., Newcomb Coll. of Tulane Univ., NEW ORLEANS 18, Louisiana, U.S.A. 113 Volpe-Wd a Embryonic VtmperaUxTC adaptations m various species. Bufo americanus, B. terrestrii. B. fowleri. B. woodhousei. B. vaUicept (Anura) b. Inheritance of color patterns /?ana pnpiens (Armra) VOY. A Dr e« Scl — Lab. de Zool . hac des Sci.. POITIERS. VietiEe France a. Croj&tance. r^to^zatioo, (OrthopteraJ b. Oeufs A d^eloppemcnt rapide ct ocofs k devcJoppemcnt rctarde. Clonop- iit (Orthoptera) WADDINGTdN. C H. Sc.D.. F.ItS.. F.M.E.. Prof. — Inst, of Animal Qer^^ U-^'v Dept of Genet.. King's Buildings. West Mains Rd. ED' f 9. Scotland a M»^ radioisotope? Trituras spec. fUrodela) (in collaboration J L :,JkUN) 'OCopie«. Drosophila %pec. (Diptera) c ij^.tir/pmfrnti] effects of metabolic antagonists. ( EveTtebrata, Verte- brataj (m collaboration with Miis M. M. PERRY and F. EILLETT) d. Electron microscope studie*. of qene action (in collaboration v/ith Miss M. M. PERRY and E. OKADA). ,> r,i f>c">' •:at»on of cartilage, f Amphibia), Mas musculus (Rodentia) (in on With T. OKADA) .' certain features of developing embryos using electron micro- graph* of ultrathjn vection*- and cytochemical techniques. Drosophila melanogaiter (Diptera). (Amphibia) (in collaboration with G. G. SEL- MAN and Miss M. M. PERRY) WAELSCH, Mrs S. GLUECKSOHN Ph.D. — Dept of Anat.. Albert Ein- stein Coll. of Med., Eastchener Road, NEW YORK 61, NY., U.S.A. a D«^.'*»1o7>T73ent of the secondary palate. A/us musculus (Rodentia) h - «mtal physiology. Mu.5 musculus L. (Rodentia) WA Ph.D. — Sonnenrain, Ittigen, BERN, Schweiz WAJJ^ // ;.r.KARA, L. B.Sc.(Hons) — Dept of Zoology. Presidency Coll.. College St. CALCUTTA 12, India a Eff«ict«i of chemical transport in morphogenesis. Amoeta ^>ec, (Proto- zoa) (in colbbrjration with S. MOOKERJEE) WALKER, B. E. B.Sc.. M.Sc.. Ph.D. Dept of Anat., McGill Univ , MONTREAL, Quebec. Canada a Development of the secondary palate. Mu? musculut (Rodentia) b. Embryology of cortisone induced cleft palate. A/u.? musculus (Rodentia) WALKMELSTER. A. - Zor.l.-vergl. Anat. Inst.. Naturw. Fair.. Univ. Zurjch, Kun«tlerga%vi: 10, ZURICH 6, Schweiz WATANABfi, T. Dr Biol. Ub.. Dept of Sci., K6nan Univ.. KOBE, Japan a. Thermal influence upon the development of early embryo. Triturus spec I/ijnobius spec., Bufo spec.. Rana spec. (Amphibia) WATERMAN, A. J. M.I.I.E. — 5 Chapin Court, Williams College. WILLIAMSTOWN. Mass., U.S.A. WATTERSON. R. L. Ph.D.. M.I.I.E. — Cresap B»ol Ub., Northwestern Univ., EVANSTON. 111.. U.S.A. a. The effects of colchicine upon development of the neural tube. Qallwi domctticus (Auee) h. The effects of nitrogen mustard upon development of the neural tube and its intraneural vascular pattern Gallus domestirm (Aves) 114 c. Modified ribs produced by exposure of the thoracic region of 2-day embryos to nitrogen mustard. Gallus domesticus (Aves) d. Effects of hypophysectomy upon development of the liver, spleen, long bones, blood, feather germs, and vascularity of the glycogen body, and upon the alkaline phosphatase content of the glycogen body. Gallus domesticus (Aves) e. Reduced endocrine activity of ovaries of hypophysectomized embryos as indicated by modified development of the genital tubercle and syrinx. Anas domesticus (Ares) f. Development of the liver following its inhibition by aminoguanidine. Gallus domesticus (Aves) g. Spina bifida at the lumbosacral level of hypophysectomized embryos and its effect on development of the glycogen body. Gallus domesticus (Aves) h. Modifications of the glycogen content of the glycogen body of the em- bryo by injections of insulin and adrenalin. Gallus domesticus (Aves) WEBER. A. F.I. I.E., Prof. (Emer.) — Lab. de Neurohistol.. Inst. d'Anat.. Ecole de Med., 20 Rue Ecole de Med., GENfiVE. Suisse a. Developpement du systeme nerveux WEBER, R. D.Phil.nat. — Zool. Inst, der Univ. Bern, Sahlistr. 8, BERN, Schweiz a. Biochemistry of mitochondria during embryonic development. Tubifex rivulorum (Oligochaeta) . Xenopus laevis (Anura) b. Submicroscopical structure of the egg. Tubifex rivulorum (Oligochaeta) , Xenopus laevis (Anura) WEDIN. B. Dr — Forsvarets Forskningsanstalt. Avdelning 1. SlINDBY- BERG 4, Sweden WlgGLARSKA, Miss B. B.Sc. - Zool. Dept of the Jagiellonian Univ.. St Anne 6, KRAKOW. Poland a. Descriptive embryology. Uifpsihius mcc;a/oni/.v (hutardiijradn) b. Histochemical studies on development, hiclasoma populi L. (Colcoptera) (in collaboration with Cz. JURA and A. KRZYSZTOFOWICZ) WEISS, L. B. — Dept of Anat.. Harvard Univ.. Mod. School, 25 Shattuck St. BOSTON 15. Mass., U.S.A. WEISS, P. A. Ph.D.. M.D. (hon.c), F.I.I.E.. Prof. — Dept of developm. Biol.. Rockclcllcr Inst, for Med. Res.. 66th St and York Ave. NEW YORK 21, N.Y., U.S.A. WEISZ, P. B. B.S.. Ph.D. — Arnold Biol. Lab.. Brown Univ.. PROVI- DENCE 12. R.I.. U.S.A. a. Study of morphogenesis. Stentor spec. Blcpharisnut spec. (Ciliata) b. Study of cell division. Stentor spec. (Ciliata). Rana pipiens (Anura). Mas norvcijicus alhintts ( Rodcntia) WELANDF.R. A. D. B.S.. M.S.. Ph.D. - Fisheries Center. Univ. of Was- hington. SEATTLE 5, Wash.. U.S.A. a. Effects of graded sublethal to lethal doses of X-rays on several different stages of the embryo. Oncorhynchus kisutch (Teleostei) WELLER. E. M. A.B., M.S. — Dept of Zool., Univ. of Calif., LOS AN- GELES 24. Cal., U.S.A. WF.LLS. L. J. Ph.D.. Prof. Dept of Anat.. School of Med.. Univ. of Min- nesota. M1NNL:AP0LIS H. Minn.. U.S.A. a. Formation of the iuguin.il bursa. Homo s^ipicrjs ( Prinuttes) 115 WcUs-Wim b. Fetal endocrinology including a study of experimental diabetes and pregnancy. Mus rattus (Rodentia) WENDT, G. G. Dr med. — Anat. Inst, der Univ., Robert Kochstr. 6, MARBURG/Lahn, Deutschland (no embryological work in progress) WENGER. B. S. B.S.. M.S., Ph.D. — Dept of Anat.. Med. School, Univ. of Kansas. LAWRENCE, Kansas, U.S.A. a. Experimental and microchemical analysis of the developing nervous system and its relationship to peripheral structures. Gallus domesticus (Aves) b. Microchemical study of glycogen in normal and aneurogenic limb muscle of the developing animal. Gallus domesticus (Aves) (in collaboration with M. TEMPLETON) c. Histochemical and microchemical study of lipids in the nervous system of the developing animal. Gallus domesticus (Aves) d. Cytochemical and microchemical study of the developing nervous system and its relationship to developing behavior patterns. Acid and alkaline phosphatase in isolated areas of brain and spinal cord. Ambystoma macu- latum (Urodela) (in collaboration with P. G. ROOFE and Mrs E. L. WENGER) WENGER. Mrs E. L. B.A., M.A., Ph.D. — Dept of Anat.. Med. School Univ. of Kansas. LAWRENCE, Kansas, U.S.A. a. Cytochemical and microchemical study of the developing nervous system and its relationship to developing behavior patterns. Acid and alkaline phosphatase in isolated areas of brain and spinal cord. Ambystoma maculatum (Urodela) (in collaboration with B. S. WENGER and P. G. ROOFE) b. Histochemical study of the developing nervous system and its relation- ship to developing behavior patterns. DNA, RNA, acid and alkahne phosphatase. Ambystoma maculatum (Urodela) (in collaboration with L. KELLER and P. G. ROOFE) WENIGER, J. P. Lic.es Sci — Lab. de Zool. et d'Embryol. exper., Inst, de Zool. et de Biol, gener.. 12 Rue de I'Universite, STRASBOURG, France a. Associations d'organes embryonnaires de meme espece et d'espece diffe- rentes en culture in vitro; gonades, intestin. (Aves. Mammalia) WESTHUIZEN. C. M. v. d. M.Sc. — Zool. Inst., Univ. of Stellenbosch, STELLENBOSCH, South Africa a. Ontogenesis of the skull. Heleophryne purcelly (Anura) WESTON, J. C. A.B.. M.S., Ph.D. ~ Dept of Anat., Ohio State Univ.. COLUMBUS 11, Ohio, U.S.A. a. A study at the cellular level of the effect of cortisone on certain bio- chemical constituents of the developing liver. Gallus domesticus (Aves) WHITING. H. P. M.A., Ph.D. — Dept of Zool.. The Univ., BRISTOL 8, England a. Development of the nervous system and behaviour pattern. Scylliorhinus canicula. Petromyzon fluviatilis, Salmo spp. (Pisces) (in collaboration with J. E. HARRIS) WILDE. Jr. C. E. A.B.. A.M., Ph.D., M.I.I.E. — Dept of Pathol., School of Dentistry, Univ. of Pennsylvania. PHILADELPHIA 4, Pa, U.S.A. a. Organogenesis in vitro (limb bud, gills, cranial neural crest). Amby- stoma maculatum (Shaw) (Urodela) 116 b. Cellular differentiation (pigment cell; ectomesenchyme). 1. causal bio- chemistry of cellular differentiation. 2. differentiation of cytoplasmic fragments. Amby stoma maculatum (Shaw) (Urodela) c. Morphology and causal biochemistry of striated muscle differentiation. Amby stoma maculatum (Shaw) (Urodela) d. Continuous flow curtain electrophoresis of molecular constituents of specific embryonic anlagen and cell types. Fraction recovery and tissue culture of embryonic cells in the presence of selected fractions. Amby- stoma maculatum (Shaw) (Urodela) WILENS, Miss S. W. A.B. — Osborn Zool. Lab., Yale Univ., NEW HAVEN 11, Conn., U.S.A. a. The movements of the endoderm in early stages studied with the use of vital dyes. (Urodela) WILLIAMS, J. B.Sc, M.B., Ch.B. — Dept of Biochemistry. Med. School Univ. of Cambridge, CAMBRIDGE, England a. Chemistry of yolk proteins. Gallus spec. (Aves) WILLIAMS, R. G. A.B., M.S., M.D., Prof. — Dept of Anat., School of Med., Univ. of Pennsylvania, PHILADELPHIA 4, Pa, U.S.A. WILLIAMS. S. C. B.S., Ph.D. — Dept of Anat.. School of Med., Univ. of Pennsylvania, PHILADELPHIA 4, Pa, U.S.A. WILLIER, B. H. B.S., Ph.D., Sc.D.. F.I.I.E., Prof., — Dept of Biol.. The Johns Hopkins Univ., Charles and 34th Sts. BALTIMORE 18, Md. U.S.A. a. Re-examination of the interactions of cortical and chromaffin cells in the development of the adrenal gland and its secretory activity. (Aves) h. Analysis of the nature of mechanisms operating in time and space in the development of rhythmic pigmentation design. (Aves) c. Formulation of principles and concepts appertaining to the development of hormonal miheu as a means of dynamic integration of the growing embryo. WILSON, J. G. B.A., M.A., Ph.D. — Dept of Anat., Coll. of Med., Univ. of Florida. GAINESVILLE. Florida. U.S.A. a. Mechanism of the teratogenic action of trypan blue. Teratogenic action of azo dyes (survey). Rattus norvegicus albinus (Rodentia) WILSON, J. W. Ph.D., Prof. — Arnold Biol. Lab., Brown Univ., PROVI- DENCE 12, R.I., U.S.A. a. A study of mitotic activity and other cytological phenomena in liver regeneration. (Vertebrata) WILT, F. H. A.B. — Dept of Embryol., Carnegie Inst, of Washington. Wolfe and Madison Sts, BALTIMORE 5. Md, U.S.A. a. An analysis of the mechanism of conversion of porphyropsin to rhodop- sin in the retina during metamorphosis, with the use of biochemical methods. Rana catesbiana (Anura) h. Cell and organ specific effects of structural analogues of pyridine nucleotide coenzymes and their precursors, tested in vitro. Gallus gallus (Aves) c. The role of induced enzyme formation in development, tested by attempt- ing to induce galactokinase in presumptive embryonic muscle, in vitro. Gallus gallus (Aves) WIMSATT. W. A. A.B.. Ph.D., M.I.I.E., Prof. — Dept of Zool., Cornell Univ.. ITHACA. N.Y.. U.S.A. 117 Wimsatt-Wur a. Comparative placentology; histochemistry and histophysiology of pla- centa. (Insectivora. Chiroptera, Ungulata, Carnivora) WINDLE. W. F. B.S.. M.S.. Ph.D., Sc.D. — Section Devel. and Regen.. Lab. of Neuroanat. Sci., NINDB, Nat. Inst, of Health. BETHESDA. Md. U.S.A. a. Factors influencing regeneration of nerve fibers in the central nervous system of adult animals. (Mammalia) h. Development of fiber tracts and nuclei in the brain. Homo sapiens (Pri- mates) c. Effects of asphyxia neonatorum on brain structure and function. ('Va- rious spp., especially Primates) WINGSTRAND, K. G. Dr Phil. — Embryol. Dept.. Zool. Inst.. Univ. of Lund. LUND. Sweden WINOWSKA. Mrs J. M.Sc. — ZaWad Anat. Porownawczej, Inst. Zool. Uniw., ul. Sienkiewicza 21, WROCLAW, Poland a. Development of the air-bladder. ( Euphy soclisti , Teleostei) fWISLOCKI. G. B. M.D., A.M., Sc.D., F.I.I.E., Prof. --. Dept of Anat., Harvard Univ., Med. School. 25 Shattuck St, BOSTON 15, Mass., U.S.A. (deceased) WITSCHI. E. Ph.D., F.I.I.E.. Prof. — Dept of Zool., State Univ. of Iowa. IOWA CITY. Iowa, U.S.A. a. Metabolism of normal and overripe eggs. (Anura) b. Malformations. (Vertebrata) c. Sex inheritance and differentiation (normal and experimental). Rana spec, Bufo spec, Alytes spec, Xenopus spec. (Anura) d. Parabiosis and hormones in sex differentiation. Triturus torosus (Uro- dela) e. Metamorphosis of the ear. (Anura) f. Embryologic and endocrine studies in adreno-gonadal relationships. (Amphibia. Aves, Mammalia) g. Nutritional conditions in the incubating egg. (Aves) h. The mechanism of ovulation. Xenopus spec. (Anura) (in collaboration with C. Y. CHANG) WOELLWARTH, C. v. Dr phil., M.I.I.E. — Heiligenberg-Inst.. (1 7b) HEILIGENBERG, Kreis Ueberlingen/Bodensee, Deutschland a. Induktion des Nervensystems. (Amphibia) b. Induktionsfelder in Neurula- und Schwanzknospenstadium. (Urodela) WOERDEMAN, M. W. M.D., D.Sc, F.I.I.E., Prof. — Anat.-Embryol. Inst., Municipal Univ. of Amsterdam, Mauritskade 61, AMSTERDAM O, Holland a. Lensregeneration. (Aves, Mammalia) h. Induction in tissue cultures and potencies of cells in tissue culture. (Aves, Mammalia) (Amphibia, Aves) c. Development of specific substances during induction and regeneration. WOLFF, Mrs Em. Dr es Sci. — Lab. d'Embryol. exper. du Coll. de France, et Lab. d'Embryol. et de Teratol. exper. du C.N.R.S., 11 Place Marcelin Bcrthelot, PARIS Ve, France a. Recherches sur la differenciation et les besoins nutritifs en culture i n V i t r o de la syrinx de I'embryon. Anas boschas, Gallus gallus (Aves) b. Recherches sur les besoins nutritifs d'organes embryonnaires explantes et cultives sur milieux synthetiques. (Amniota) 118 c. Culture de differentes tumeurs cancereuses sur des organes embryon- naires explantes in vitro (en collaboration avec Et. C. WOLFF). WOLFF, Et. C. Dr es Sci.. F.LLE.. Prof. — Lab. d'Embryol. exper. du Coll. de France, et Lab. d'Embryol. et de Teratol. exper. du C.N.R.S., 1 1 Place Marcelin Berthelot, PARIS Ve, France a. Recherches experimentales sur I'embryologie et la teratologic. Monstrcs simples, monstres doubles et poly-embryonie. (Aves) b. La differenciation sexuelle, par les methodes de greffes, de castration, d'injections d'hormones et d'explantations. Differenciation normale et inversion sexuelle des gonades, des voies genitales et des caracteres somatiques precoces. Gallus spec. Anas spec. (Aves) (en collaboration avec Mrs D. SCHEIE— PFLEGER, Miss B. SALZGEBER, A. HAM- Pe et G. STRUDEL) c. Problemes relatifs a la regeneration. Origine des cellules de regeneration et processus d'induction dans la regeneration. Polycelis nigra, Euplanaria lugubris (Turbellaria), Triturus cristatus (Urodela) d. Recherches sur la differenciation in vitro des caracteres sexuels embryonnaires (gonades, canaux de Miiller etc.) et de differents orga- nes. Besoins nutritifs des organes en culture en milieux synthetiques. (Amniota) (en colloboration avec Mrs K. STENGER— HAFFEN, Mrs Em. WOLFF et Mrs M. A. KIENY) e. Culture de cellules tumorales sur des explants d'organes in vitro: association d'organes embryonnaires et de tumeurs (en collaboration avec Mrs Em. WOLFF). f. Association d'organes heterogenes en culture in vitro. Association d'organes d'especes et de classes differentes. Potentialites et affinites des cellules de tissus homologues et differents dans les associations hetero- genes. (Aves, Rodentia) WOLSKY, A. Dr Phil.. Prof. — Biol. Lab., Fordham Univ.. NEW YORK 58, N.Y.. U.S.A. a. The physiology of pigment-controlling and bristle number-controlling genes, including the production of phenocopies. Drosophila melanogaster (Diptera). Mormoniella vitripennis (Hymenoptera), Cricetus (= Meso- cricetus) auratus (Rodentia) b. Regional differences in the development of the compound eye and their correlation with the central nervous system (optic tract). Bombyx mod (Lepidoptera) , Mormoniella vitripennis (Hymenoptera) z. , .Compensatory hyperregeneration" and related regeneration phenomena. Oncopeltus [asciatus (Hymenoptera), Triturus viridescens (Urodela) WOODGER. }. H. Prof. — Middlesex Hosp., Med. School, LONDON W. 1, England (U.K.) WRBA. H. Dr rer.nat., Dr med. — Pathol. Inst, der Univ., Thalkirchnerstr. 36, MUNCHEN. Deutschland a. Stoffwechsel in vitro. (Rodentia) b. Eihautbildung und Dif ferenzierung in vitro. (Rodentia) WURMBACH, H. Dr, Prof. — Entwicklungsgesch. Abt., Zool. Inst, der Univ. Bonn, BONN, Deutschland a. Beeinflussung des Wachstums und der Differenzierung durch Wirk- stoffe (Schilddriisenhormon, Steroide, Thymuswirkstoffe). Lebistcs spec, Xenopus laevis, Bufo spec, Gallus spec. (Vertebrata) 119 Wurmbach-Zot b. Formbildende Krafte beim Wachstum (Wachstumsdynamik); formbil- dende Bedeutung der Gewebe. Bu[o spec. (Anura), (Aves) WYTTENBACH. C. R. A.B.. M.A. — Dept of Embryol.. Carnegie Inst, of Washington. Wolfe and Madison Sts, BALTIMORE 5. Md. U.S.A. a. Chemodifferentiation of the embryonic nervous system. Gallus gallus (Aves) XAVIER MORATO. M. J. Prof. — Inst, de Histol. e Embriol.. Fac. dc Med.. Avenida 28 de Maio. LISBOA, Portugal a. Development of the area postrema. Oryctolagus cuniculus (Lagomorpha) YAFFE. D. M.Sc. — Dept of Exper. Biol., Weizman Inst, of Sci., REHO- VOTH, Israel a. The distribution and synthesis of organ-specific proteins: antigens and enzymes. Gallus spec. (Aves), Mus spec. (Rodentia) (in collaboration with M. FELDMAN) YAGIU. R. D.Sc. Prof. — Zool. Lab.. Fac. of Sc, Hiroshima Univ.. HIRO- SHIMA CITY, Japan YAJIMA. H. M.A. — Embryol. Section. Dept of Biol.. Tokyo Metropolitan Univ.. Setagaya-ku. TOKYO. Japan a. Embryonic determination. Harlequin-fly (Diptera) YAMADA. T. D.Sc. Prof. — Biol. Inst.. Fac. of Sci.. Nagoya Univ.. Chi- gusa-Ku. NAGOYA. Japan a. Isolation of the bone marrow factor, which is responsible for induction of mesodermal structures in the ectoderm of the gastrula. (Amphibia, Mam- malia) (in collaboration with K. TAKATA and S. OSAWA) b. Electronmicroscopic study of elaboration of the cell structures during the early phase of differentiation. Triturus pyrrhogaster (Urodela) (in col- laboration with S. KARASAKI) c. The effect of mesoderm and mesectoderm on the differentiation of the isolated areas of the endoderm of the neurula. Triturus spec. (Urodela) (in collaboration with Miss C. TAKATA) YAMAMOTO, K. M.Sc. D.Sc. Prof. — Lab. of Fresh-water Fish Cul- ture. Dept of Biol.. Fac. of Fish.. Hokkaido Univ.. HAKODATE, Japan a. Studies on the formation of eggs. (Teleostei) YAMAMOTO. T. D.Sc, Prof. — Biol. Inst.. Fac. of Sci.. Nagoya Univ., Chigusa-Ku. NAGOYA. Japan a. On the mechanism of fertilization and activation. Oryzias latipes (Teleos- tei) h. Artificial induction of functional sex-reversal. Oryzias latipes (Teleostei) c Melanin formation in color phenotypes. Oryzias latipes (Teleostei) (in collaboration with T. HISHIDA and H. TOMITA) YAMAMOTO. T. S. M.Sc. — Dept of Zool.. Fac of Sci.. Hokkaido Univ., North 8. West 5. SAPPORO, Japan a. Cytochemical investigation on development. (Teleostei) (in collaboration with Y. KANOH) YANAGISAWA. T. — Biol. Inst.. Shizuoka Univ., Oiwa - 2. SHIZUOKA CITY. Shizuoka. Japan phibia) a. Phosphate metabolism during embryogenesis and metamorphosis. (Am" b. Phosphate metabolism during embryogenesis. (Echinodermata) YANAI. T. Ph.D. — Dept of Biol., Shimane Univ., MATSUE. Shiraane- ken, Japan 120 YAO, T. Ph.D. — Lab. of Developm. Physiol.. Inst, for Exper. Biol.. Acad. Sinica. 865 Chang Ning Rd. SHANGHAI. China YNTEMA. C. L. Ph.D., F.I.I.E.. Prof. — Dept of Anat.. School of Med., State Univ. of New York. 766 Irving Ave, SYRACUSE 10. N.Y., U.S.A. a. Induction and differentiation of ear ectoderm. Amby stoma punctatum (Urodela) b. Regeneration of aneural limbs. Ambystoma punctatum (Urodela) c. Development of autonomic nervous system. Gallus domesticus (Aves) (in collaboration with W. S. HAMMOND) d. Develooment of the visceral skeleton. Gallus domesticus (Aves) (in col- laboration with W. S. HAMMOND) YOSHIKURA. M. Dr — Dept of Biol.. Fac. of Sci.. Kumamoto Univ.. KUMAMOTO-shi. Japan a. Comparative embryology. (Araneae, Arachnoidea) b. Effect of light on the development of mygalomorph forms. Atypus kar- schi, Ummidia fragaria (Araneae, Arachnoidea) YOUNG. W. C. Ph.D., Prof. — Dept of Anat.. Med. School. Univ. of Kansas. LAWRENCE. Kansas. U.S.A. a. Reproduction as influenced by hypothyroidism and hyperthyroidism in both males and females. Cavia porcellus (Rodentia) b. Sexual behaviour in the male. Cavia porcellus (Rodentia) ZAAIJER. Miss J. J. P. Ph.D. — Lab. for Cytol. and exper. Histol.. Fac. of Med., Univ. of Leyde, Rijnsburgerweg 10, Boerhaavekwartier. LEI- DEN. Holland a. Cartilage and bone formation in vitro. Homo sapiens (Primates) h. Muscle fibre development. Homo sapiens (Primates) ZAHND, J. P. — Inst. d'Embryol., Fac. de Med.. 1 Place de I'Hopital, STRASBOURG. France a. Developpement du squelette. Facteurs influengant le developpement. Anas spec. (Aves) ZELLER, Ch. — Zool.-vergl. Anat. Inst.. Naturw. Fak.. Univ. Ziirich. Kiinstlergasse 16, ZtlRICH. Schweiz ZENKER. W. Drmed. — Anat. Inst.. Wahringerstr. 13. WIEN 9, Oes- terreich a. Development of the organon buccotemporale Chievitz. (Mammalia) ZEUTHEN. E. Dr phil., M.I.I.E. — Biol. Inst, of the Carlsberg Foundation. 16. Tagensvej. COPENHAGEN N. Denmark a. Study with Cartesian divers of mitotic rhythm in oxygen uptake and in carbon dioxide output during cleavage period. (Echinoidea, Ciliata) b. Mitotic rhythm in reduced weight (weight below water) during cleavage. Psammechinus microtuberculatus (Echinoidea) (in collaboration with W. L. M. GEILENKIRCHEN, Utrecht) c. Studies on the biochemistry and physiology of synchronized cell systems. Tetrahymena pyriformis (Holotricha, Ciliata) (in collaboration with K. HAMBURGER and P. PLESNER) ZIMMERMAN, A. A. M.I.I.E. — Dept of Anat.. Coll. of Med.. Univ. of Illinois. 1853 West Polk Street, CHICAGO 12. 111.. U.S.A. ZOTIN. A. I. Cand.Biol.Sci. — Inst, of Animal Morphol. of the Acad, of Sci. of the U.S.S.R.. Bolshaja Kalushskaja 33. MOSCOW V-7L U.S.S.R. 121 Zotin-Zwi a. Study of water metabolism in embryonic development. Huso huso, Aci- pencrs giildenstadti. A. stcllatus ( Acipenseriformes, Chondrostei) , Salmo salar. Corcgonus lararetus (Clupeiformcs. Tcleostei) ZUCKERMAN! S. M.A.. M.D.. D.Sc. M.R.C.S.. L.R.C.P., F.R.S., Prof. — Dept of Anat.. The Med. School, Birmingham Univ.. Edgbaston, BIRMINGHAM 1, England (no cmbryological work in progress) ZULEGER. S. Dr med. — Anat. Inst, der Univ.. Robert Kochstr. 6. MAR- BURG Lahn, Deutschland (no embryological work in progress) ZWAN. A. Van der Med.Cand. — Anat.-Embryol. Lab.. Free Calvinistic Univ.. Pr. Hendriklaan 27. AMSTERDAM Z. Holland a. Investigation into the function of the epiphysis by means of contact tissue culture and chorio-allantoic transplantation. ZWEIBAUM. J. Dr. Prof. — Inst, of Histol. and Embryol.. Acad, of Med., ul. ChaJubihskiego 5. WARSZAWA, Poland (no embryological work in progress) ZWILLING. E. Ph.D.. M.I.I.E. — Dept of Anim. Genet.. Coll. of Agric, Univ. of Connecticut. Storrs Agric. Exper. Stat., STORRS, Conn.. U.S.A. a. Disaggregation and reaggregation of early embryos. Effects on differen- tiation. Gallus domesticus (Aves) h. Culture behaviour of early embryonic tissues. Gallus domesticus (Aves) c. Ectoderm-mesoderm interaction in limb development. Gallus domesticus (Aves) 122 N. Africa S.Afi LIST OF INSTITUTES with Composition of Scientific Staffs (ifeoi^apLical order) N.AFRICA EGYPT Alexandria, Moharram Bey, Alexan- dria Univ., Fac. of Sci., Dept of Zool. RAMADAN. M. Head of Dept * SEDRA. S. N. Asst Prof. * MICHAEL, M. I. Demonstr. * MOURSI, A. A. Demonstr. Alexandria, Alexandria Univ.. Fac. of Med.. Dept of Anat. * MINA, E. Y. Cairo, Abassia, Ain Shams Univ., Fac. of Sci. * KAMEL, A. MAROC Rabat, Avenue Biarnay, Centre d'Etudes Sup. Sci., Lab. de Biol. Anim. * METTETAL, C. Dir. * LAHAYE. Mrs J. * BONS. J. SUDAN Khartoum, Univ. Coll. of Khartoum, Dept of Anat. * BUTLER, H. Prof., Head MAHRAN, Z. Y. Lect. S.AFRICA UNION OF SOUTH AFRICA Bloemfontein, Univ. of O.F.S., Dept of Zool. DUYVENfi DE WIT, J. J. Prof. PLETZEN. R. van Lect. * DREYER. Miss M. V. Asst Cape Town, Rondebosch, Univ. of Cape Town, Dept of Zool. DAY, J. H. Prof., Dir. MILLARD, Mrs N. A. H. Lect. (no embryol. work in progress) Cape Town, Seapoint, Beach Rd, Div. of Fisheries MARCHAND, J. M. Prof., Dir. * DA VIES, D. H. Sen. Prof.. Off. * JAGER, B. de Prof., Off. Johcinnesburg, Hospital Hill, Univ. of the Witwatersrand, Med. School, Dept of Physiol. GILLMAN, J. Prof. Johannesburg, Milner Park. Univ. of the Witwatersrand, Fac. of Sci., Dept of Zool. * BALINSKY, B. I. Prof.. Head * GABIE— GUBBAY. Mrs V. Lect. Dept of Anat. ANDREW, Miss A. Mowbray, C.P.. Univ. of Cape Town. Med. School, Anat. Dept * SINGER. R. Potchefstroom, Potchefstroom Univ., Dept of Zool. EISELEN. G. T. S. Prof., Dir. RYKE, P. A. J. Docent EEDEN. J. A. van Docent (no embryol. work in progress) Pretoria, Univ. of Pretoria, Dept of Animal Husbandry JOUBERT. D. M. (no embryol. work in progress) Pretoria, Univ. of Pretoria. Fac. of Sci.. Dept of Zool. ELOFF. F. C. Prof.. Head MALAN. D. Sen. Lect. BARRY. T. H. Lect. Stellenbosch, Univ. of Stellenbosch, Fac. of Sci.. Zool. Inst. TOIT. C. A. du Prof., joint Dir. VILLIERS. C. G. S. de Prof., joint Dir. Neimes of investigators who have sent in their data over this year. 123 S.Africa • MALAN. Miss M. E. Sen. Lect. ENGELBRECHT, D. van Z. Lect. KOCK. J. M. de Jun. Lect. U.S.A. (Cal.) Guest-Workers: WESTHUIZEN, C. M. van der DIJK. D. E. van SKINNER. J. H. N. AMERICA CANADA ALBERTA (Alta) Edmonton, Univ.. of Alberta. Med. School. Dept of Anat. * SHANER. R. F. Prof., Dir. BRITISCH COLUMBIA (B.C.) Vancouver 8, Univ. of British Co- lumbiei, Dept of Zool. COWAN, L McT. Prof.. Head * FORD. P. Assoc. Prof. Histol. & Embryol. ONTARIO (Ont.) Guclph, Ontario Agricultural Coll., Dept. of Entomol. and Zool. OZBURN. R. H. Prof. Kingston, Queens Univ., Fac. of Med.. Dept of Histol. & Embryol. KROPP, B. N. Prof.. Dir. PERROTTA. C. A. Lect. London, Univ. of Western Ontario. Dept of Zool. * BATTLE. Miss H. I. Prof. PURKO. J. Toronto 5, Univ. of Toronto, Dept of Zool. FISHER. K. C. Prof.. Chairman * McCALLION. D. J. Prof. UNITED STATES ALABAMA (Ala) Birmingham 5. 620 South 20th St, Med. Center of the Univ. of Ala- bama, Schools of Med. and Dent.. Dept of Anat. FOLEY. J. O. Prof.. Chairman SENSENIG, E. C. Prof. KLAPPER, CI. E. Assoc. Prof. * MOFFETT, B. C. Jr Asst Prof. ARKANSAS Little Rock, Univ. of Arkansas. School of Med., Dept of Anat. QUEBEC Montreal, 2900 Boulevard du Mont Royal, Univ. de Montreal, Fac. de Med.. Dept d'Histol. et d'Embryol. BONIN. W. Prof, titul.. Dir. FRAPPIER, J. Prof, agrege (no embryol. work in progress) Montreal, McGill Univ., Dept of Zool. BERRILL, N. J. Prof. RATTENBURY. J. Dept of Anat. * LEBLOND, C. P. Prof. * WALKER, B. E. * LANGMAN. J. Dept of Genetics * FRASER, F. C. * MILLER, J. R. TRASLER, D. G. SASKATCHEWAN Saskatoon, Univ. of Saskatchewan. Dept of Anat. * ALTSCHUL. R. Prof., Dir. * FEDOROFF. S. Instr. * GROENENDIJK— HUIJBERS, Mrs M. M. Asst Prof. JAFFEE, O. C. (no embryol. work in progress) CALIFORNIA (CaL) Berkeley 4. Univ. of California, Dept of Zool. EAKIN. R. M. Prof. MAZIA, D. Prof. HARRIS, M. Assoc. Prof. BERG. W. E. Asst Prof. KRUGELIS— MACRAE. Mrs E. J. Davis, Univ. of California, Dept of Zool. HARVEY, E. B. 124 U.S.A. (Cal.) Los Angeles 24, Univ. of California, Dept of Zool. SCHECHTMAN, A. M. Prof. FLICKINGER. R. A. Asst Prof. WELLER, E. M. KNIGHT, Miss P. F. SMITH. A. S. HIRATA, A. A. SOUNHEIN, E. Atomic Energy Project SCHJEIDE. O. A. School of Med., Dept of Anat. * GREULICH, R. C. Asst Prof. CLEMENTE, C. D. Asst Prof. Pacific Grove 133, Third St, Hopkins Marine Station * MOORE, A. R. Prof. Palo Alto, Stanford Univ., Dept of Biol. * GROBSTEIN, C. Pasadena 4, California Inst, of Technol., Div. of Biol., Dept of Embryol. * TYLER. A. Prof., Head of Dept * BERNSTEIN, G. S. Research Fellow VOGT, Miss M. Sen. Research Fellow JONES, Miss M. A. Research Asst BLACK, R. Research Fellow EDWARDS, R. G. Research Fellow EDWAPDS, Mrs R. E. Research Fellow TEMIN, H. San Luis Obispo, Calif. State Poly- technic College, Biol. Sci. Dept * THURMOND, W. Stanford, Stanford Univ., Dept of Biol. Sci. TWITTY, V. C. Prof., Dir. COLORADO (Colo) Denver 20, 4200 East Ninth Ave, Univ. of Colorado, Med. Center, Div. of Chem. Embryol. * HERRMANN, H. Prof., Dir. * KONIGSBERG, I. R. * KONIGSBERG, Mrs U. ROTHFELS * SAMUELS, A. J. U.S.A. (D.C.) CONNECTICUT (Conn.) Middletown, Wesleyan Univ.. Dept of Biol. * CASPARI, E. W. Prof., Dir. GOODRICH, H. B. Prof. BATTIN. W. New Haven 11. 333 Cedar St. Yale Univ., School of Med.. Anat. Dept * STONE, L. S. Prof. * CRELIN, E. S. * COULOMBRE, A. J. * COULOMBRE, J. L. New Haven 1 1 , Yale Univ., Osborn Zool. Lab. * NICHOLAS, J. S. Prof., Dir. * HARRISON, R. G. Prof. (Emer.) * BOELL. E. J. Prof. * STONE, L. S. Prof. * POULSON, D. F. Prof. * SHEN, S. C. Res. Asst * WILENS, Miss S. W. Res. Assoc. * RUDNICK, Miss D. * HOOKER. D. Prof. (Emer.). Guestworker * COUNCE, Miss S. J. New Haven 1 1 , Yale Univ., Zool. Dept. * HANSON, E. D. * SMALL, Miss J. E. New Haven 11, Yale Univ., Josiah Willard Gibbs Research Lab. TRINKAUS, J. P. Storrs, Univ. of Connecticut, Dept of Zool. * CLARK. H. Prof. * GOLDIE, M. * CHOUNICK, A. Coll. of Agric, Storrs Agric. Exp. Stat., Dept of Animal Genetics * LANDAUER, W. Prof., Dir. * ZWILLING, E. Assoc. Prof. CHAMBERS CASORSO, Miss H. Research Asst DISTRICT OF COLUMBIA(D,C) Washington 7, Georgetown Univ., School of Med. * MENSCHIK, Z. Prof. Washington 1 7, Trinity College 125 U.S.A. (D C.) * DIMOND, Sister M. T. Washington, The Cathohc Univ. of America * LYNN. W. G. FLORIDA Gainesville, Univ. of Florida, Coll. of Med., Dept of Anat. * WILSON. J. G. ODOR, Miss D. L. Dept of Biol. * BROOKBANK. J. W. * GREGG, J. H. WITT, R. M. De Tallahassee, Florida State Univ., Dept of Zool. METZ. C. B. GEORGIA (Ga) Atlanta, Emory Univ., Dept of Biol. * CLEMENT, A. C. Prof. * HUNT, E. L. Prof. * HUMPHRIES, A. A., Jr Dept of Anat. MILLER. J. A., Jr. Augusta, Med. Coll. of Georgia, Dept of Microsc. Anat. HEUSER, C. H. Prof. ILLINOIS (IlL) Carbondale, Southern Illinois Univ. * FINAMORE, F. J. Zool. Dept * FOOTE. C. L. Prof. * FOOTE, Mrs F. M. Chicago 12, 706 South Wolcott Ave, Stritch School of Med. KARCZMAR. A. G. Chicago 12, Univ. of Illinois, Coll. of Med., Dept of Anat. * REYNOLDS, S. R. M. Prof., Head Chicago 37, Univ. of Chicago, Physiol. Lab. t LILLIE, R. S. KRAHL. M. E. Biol. Sci. Div., Dept of Zool. PRICE, Miss D. Assoc. Prof. (Embryol., Sex Biol.) OVERTON. Mrs J. Res. Assoc. CAVANAUGH, M. W. 126 U.S.A. (Iowa) Chicago 37, 5700 S. Inglesidc, Univ. of Chicago, Whitman Lab. * MINTZ, Miss B. Assoc. Prof. Evanston, Northwestern Univ., Cresap Biol. Lab. * WATTERSON, R. L. VENEZIANO, P. BARTHA, A. BROWN. D. INMAN, Miss O. Dept of Biol. Sci. * KALTENBACH, Mrs J. C. Lcmont, P. O. Box 299, Argonne National Lab. * TAHMISIAN, T. N. Urbana, Univ. of Illinois, Dept of Zool. ADAMSTONE, F. B. Prof., Head of Dept ROSE, S. M. Prof. SEHE, Ch. T. INDIANA (Ind.) Bloomingtoa, Indiana Univ., Dept of Zool. TORREY, T. W. Chairman BRIGGS, R. W. CROWELL, P. S. Asst Prof. HUMPHREY, R. R. RUTH, R. F. ALBRIGHT, J. F. BEARD, R. G. DUFFEY, L. M. JOHNSON. B. H. MUN, A. M. VOGEL. N. W. Franklin, Franklin Coll. RHODES, S. A. Notre Dame, Univ. of Notre Dame CHALKLEY, D. T. ROTHBARD, M. J. STOKELEY, P. S. FINNEGAR, C. V. IOWA Ames, Iowa State Coll., Div. of Sci. Dept of Zool. and Entomol. HARRIS. H. M. Dir. * HAMILTON, H. L. Prof. * ROTHENBUHLER, W. C. Dept of Genetics * BRYAN, J. H, D. U.S.A. (Iowa) * HOLLANDER. W. F. Iowa City, State Univ. of Iowa, Dept of Zool. * KOLLROS.J. J. Prof., Chairman * WITSCHI. E. Prof., Dir. of Embryol. Lab. * CHANG, C. Y. Res. Assoc. * JOHNSON, D. C. Radiation Research Lab., Med. Labs LI, Mrs Yu-Ying KANSAS (Kan.) Lawrence, Univ. of Kansas, Med. School, Dept of Anat. * ROOFE, P. G. Prof., Dir. * TRACY, H. C. Prof. (Emer.) * YOUNG, W. C. Prof. * LATIMER, H. B. Prof. (Emer.) * WENGER, Mrs E. L. * WENGER, B. S. Asst Prof. * TEMPELTON. M. Instr. * KELLER, L. Grad. stud. KENTUCKY (Ky) Louisville 2, 101 West Chestnut St. Univ. of Louisville, School of Med., Dept of Anat. * HALL, E. K. LOUISIANA New Orleans 18, Tulane Univ.. Newcomb Coll.. Dept of Zool. * VOLPE. E. P. MAINE (Mc) Bar Harbor, Box 558, Roscoe B. Jackson Memorial Lab. LITTLE. C. C. Prof.. Dir. * HUMMEL. Miss K. P. Res. Assoc. * SAWIN. P.B. Prof.. Res. Assoc. * RUNNER, M. N. Res. Assoc. * GATES, A. H. * STEVENS, L. AVIS, F. SMITHBERG, M. MARYLAND (Md) Baltimore 1. Univ. of Maryland, School of Med.. Dept of Anat. McCAFFERTY, R. E. Baltimore 4, Goucher Coll., Dept of Biol. U.S.A. (Md) * MOMENT, G. B. Baltimore 5. Wolfe and Madison Sts, Carnegie Inst, of Washington, Dept of Embryol. * EBERT, J. D. Director, Prof. * BARTELMEZ, G. W. Consultant BURNS, R. K.. Jr. Staff Member, Prof. * RAMSEY. Miss E. M. Pathologist. Investigator RAWLES. Miss M. E. Curator Embryol. Collection Staff members: * BISHOP, D. W. * BOVING. B. G. * HAAN, R. L. De * RUTH, R. F. Fellows: * FEO, V. J. De * KATSH, S. * STEINBERG. M. S. LAUFER, H. Visiting investigator: * SETTLE, G. W. Junior investigators: * BEARD. R. G. * WILT, F. H. * WYTTENBACH. C. Baltimore 18, Charles and 34th Sts, The Johns Hopkins Univ.. Fac. of Phil., Dept of Biol. * WILLIER. B. H. Prof. * MARKERT. C. L. Prof. BURNS, R. K. Hon. Prof. * KANE, R. E. Baltimore 18, The Johns Hopkins Univ., School of Med.. Dept of Anat. LITTRELL, Miss J. L. Asst Prof. Bethesda 14, Nat. Inst, of Health SHANNON, ... Dir. N.I.N.D.B.; Lab. Neuroanat. Sci., Section Developm. and Regen. * WINDLE, W. F. Chief * GUTH, L. * SIDMAN, R. * MIALE, Miss I. Maryland, Army Chemical Center, Chemical Corp. Medical Directorate * BODENSTEIN, D. 127 U.S.A. (Mass.) MASSACHUSETTS (Mass.) Boston 15, 195 Pilgrim Rd, Deaco- ness Hospital and Harvard Med. School * HICKS. S. P. Boston 15. 25 Shattuck St, Harvard Univ., Med. School, Dept of Anat. + WISLOCKI, G. B. Prof., Dir. PADYKULA. Miss H. A. DEMPSEY, E. W. ELLIS. R. WEISS. L. B. BURGOS. M. AMOROSO, E. C. Dept of Pathol. * HERTIG. A. T. * ADAMS, Miss E. C. * McKAY. D. G. * BENIRSCHKE, K. * BARDAWIL, W. Dept of Gynecol. * ROCK. J. Boston 15, 221 Longwood Ave, Boston Lving-in Hospital * HERTIG, A. T. * McKAY, D. G. Brookline, 245 Pond Ave. Free Hospital for Women * HERTIG. A. T. * McKAY, D. G. * MULLIGAN, W. J. * ROCK. J. Cambridge 38. Divinity Ave. Harvard Univ., Biol. Lab. HOADLEY, L. Prof. (Embryol.) Northampton, Smith Coll., Dept of Zool. CARPENTER. Miss E. Prof., Chairman TE WINKEL. Miss L. E. Prof. VILLAFRANCA, G. W. de Asst Prof. Shrewsbury, 222 Maple Ave, Wor- cester Foundation for Exper. Biol. * PINCUS. G. Prof., Dir. * CHANG. M. C. South Hadley, Mount Holyoke Coll., Dept, of Zool. U.S.A. (Mo.) * STEIN. Miss K. F. Waltham 54, Brandeis Univ. * JAFFE. L. F. MICHIGAN (Mich.) Ann Arbor, 2500 East Med. Build.. Univ. of Mich.. Med. School, Dept of Anat. PATTEN. B. M. Prof., Chairman of Dept BARRY, A. Assoc. Prof. Dept of Zool. BROWN, D. E. S. Chairman * STOCKARD, A. H. ProL * KEMP, N. E. Assoc. Prof. * NACE, G. W. Assoc. Prof. * LOEWENTHAL, Miss L. A. Detroit 2, Wayne State Univ., Dept of Biol. * HEIM, W. G. . Detroit 7, Wayne State Univ., Coll. of Med., Dept of Anat. * O'RAHILLY. R. Prof. * MEYER. D. B. * GARDNER, E. * GRAY, D. J. East Lansing, Michigan State Univ., Zool. Dept SHAVER, J. R. BARCH. Mrs St. H. Res. Assoc. OWENS, W. C. Res. Assoc. MINNESOTA (^Minn.) Minneapolis 14, Univ. of Minnesota, Coll. of Sci., Lit. and Arts. Dept of Zool. MINNICH. D. E. Chairman * SPRATT. N. T., Jr Prof. School of Med., Inst, of Anat. LAZAROW, A. Head of Dept BOYDEN, E. A. Prof. (Emer.) * WELLS, L. J. ProL * FELTS, W. J. L. Asst Prof. MISSOURI (Mo.) Columbia, Univ. of Missouri, Dept of Zool. ELDER. W. H. Prof.. Chairman NOVITSKI, E. Assoc. ProL CONAWAY, C. H. School of Med.. Dept of Anat. 128 U.S.A. (Mo.) * BROWN, J. W. St Louis 5, Lindell and Skinker Aves, Washington Univ., Dept of Zool. * HAMBURGER, V. Prof., Head of Dept * MOOG, Miss F. Assoc. Prof. LEVI— MONTALCINI. Miss R. Assoc. Prof. Med. School, Dept of Anat. COHEN, A. I. * CHIQUOINE, A. D. St Louis 16, 4545 Oleatha Ave. Me- dical Research, Merck Sharp and Dohme Research Labs, Div. of Merck and Co Inc. * REBERT, R. R. NEBRASKA Omaha, The Creighton Univ., School of Med., Dept of Anat. CLEMENTS, L. P. Prof, of Histol. GUGGENHEIM. P. Dept of Biol. * SCHLESINGER, A. B. Asst Prof. Omaha 5, Univ. of Nebraska, Coll. of Med., Dept of Anat. LATTA, J. S. HOLYOKE, E. A. CHAPMAN, A. O. NEW JERSEY (NJ.) Jersey City 4, Clifton Place. Labora- tory. Margaret Hague Maternity Hospital * GRUENWALD, P. Dir. of Labs Newark 4, Rutgers Univ., Coll. of Pharmacy * FROST, D. Asst Prof. Biol. Sci. Princetoai, Princeton Univ., Dept of Biol. * BUTLER. E. G. Prof. * FANKHAUSER, G. Prof. * BONNER, J. T. Assoc. Prof. * HARVEY, Mrs E. BROWNE Indep. Invest. NEW YORK (N.YO Brooklyn, 385 Flatbush Avenue Ex- tension, Long Island Univ. U.S.A. (N.Y.) NAPP. M. Instr. Brooklyn 1, 350 Henry St. State Univ. of New York, Coll. of Med., Dept of Anat. GENNARO, J. F.. Jr. Instr. TALBERT, G. B. Brooklyn 9, Veterans Administrat- ion Hospital KRUGER. A. W. Manager (no embryol. work in progress) Brooklyn 10, Bedford Ave and Ave H, Brooklyn Coll., Dept of Biol. * CHENEY. R. H. Prof. * MARTIN. Miss B. A. Instr. Buffalo 3, 666 Elm St. Roswell Park Memorial Inst. " BRUNST. V. V. Buffalo 14. Univ. of Buffalo. School of Med., Dept of Anat. * JONES. O. P. Prof., Head Dept of Biol. * SWARTZ. G. E. CELESTINO. V. S. RAMM, G. M. Ithaca, Cornell Univ.. Dept of Zool. ADELMANN, H. B. Prof. * SINGER, M. Prof. * GILBERT, P. W. Prof. * WIMSATT, W. A. Prof. Lab. of exp. Embryol. ROMANOFF, A. L. Prof. New York City, Cornell Univ., Med. Coll. ' SHANNON, J. E. New York, Flushing 67, L.I.. Queens Coll., Dept of Biol. * COLWIN, A. L. Prof. * COLWIN, Mrs L. HUNTER Prof. New York 3, Washington Square, New York Univ., Washington Square Coll., Biol. Dept * MARSLAND, D. A. DALTON, H. C. New York 16, 477 First Ave, New York Univ., Coll. of Dentistry, Dept of Histol. GOLDSMITH, E. D. New York 16, 550 First Ave, New York Univ., Bellevue Med. Center 129 U.S.A. (N.Y.) * ROCKSTEIN, M. Assoc. Prof. of Physiol. New York 21. 66th St and York Ave, Rockefeller Inst, for Med. Res. MIRSKY. A. Dir. NIU, M. C. * CORNER. G. W. Dept of developm. Biol. WEISS, P. A. Prof.. Head of Dept KAVANAU. J. L. Asst McMURRAY. Miss V. M. Res. Assoc. New York 27, Broadway and 116th St, Columbia Univ., Dept of Zool. * MOORE. J. A. Prof. BARTH, L. G. Prof. BARTH, Mrs L. JAEGER Res. Assoc. * GREGG, J. R. Assoc. Prof. * MOORE, Mrs B. C. Res. Assoc. * STINSON. B. D. BENNETT. D. Res. Assoc. AUERBACH, R. New York 32, 630 West 168th St, Columbia Univ.. Coll. of Phys. 6 Surgeons Dept of Radiology, Radiol. Res. Lab. FAILLA, G. Prof., Chairman * RUGH, R. Assoc. Prof. Dept of Anat. COPENHAVER, W. M. Prof, t DETWILER. S. R. Prof. Nerw York 32, Francis Delafield Hosp.. Dept Biochem., Coll. of Phys. & Surgeons * LIEDKE, Mrs K. BEYER New York 58, Fordham Univ., Biol. Lab. * WOLSKY. A. * LUDWIG, D. New York 61, Eastchester Road, Albert Einstein Coll. of Med., Dept of Anat. * WAELSCH. Mrs S. GLUECKSOHN SISKEN. Miss B. F. ROTA. Mrs T. RONDON BRADEN. A. W. H. Dept of Pathol. * ROSENBAUM. R. M. 130 U.S.A. (N.C.) Rochester 20, Univ. of Rochester. Coll. of Arts and Sci.. Dept of Biol. * HOLTFRETER, J. K. F. Prof. * MUCHMORE, W. B. Rochester 20, P.O. Box 287. Station 3, Univ. of Rochester, School of Med. and Dentistry, Dept of Pharmacol. * BERG. G. G. Schenectady 8, Union Coll., Dept of Biol. CLARK, L. B. * RAPPAPORT. R.. Jr. Syracuse 10, State Univ. of New York. Med. Coll., Dept of Anat. * ARMSTRONG, P. B. Prof., Chairman * YNTEMA. C. L. Prof. * SPOFFORD. W. R. Assoc. Prof. * HAMMOND, W. S. Assoc. Prof. Upstate Med. Center at Syracuse GOLDMAN. A. S. Syracuse 10, Syracuse Univ., Dept of Zool, * EVANS, H. J. Tuckahoc 7, Westchester County, The Wellcome Research Labs * BIEBER. S. NORTH CAROLINA (N.C.) Beaufort, Duke University, Marine Lab. * COSTLOW, L. D. Camp Lejeunc, U.S. Naval Hospital * CROWDER. R. E. Chapel Hill, Univ. of N. Carolina. Dept of Zool. * COSTELLO, D. P. Kenan Prof.. Chairman of Dept LEHMAN, H. E. Assoc. Prof. HENLEY, Miss C. Res. Assoc. School of Med., Dept of Anat. * DOSSEL. W. E. * FOWLER, I. Durham, Duke Univ., Dept of Zool. WILBURG, K. M. Prof., Chairman H ARGITT. G. T. Prof. ( Emer. ) PEARSE. A. S. Prof. (Emer.) U.S.A. (N.C.) * BOOKHOUT, C. G. Prof. * HORN, E. C. Assoc. Prof. NORTH DAKOTA Grand Forks, Univ. of N. Dakota, School of Med., Dept of Anat. * SNOOK, T. OHIO Cincinnatti 8, Univ. of Cincinnatti, Coll. of Med., Dept of Anat. CRAFTS, R. C. Chairman (no embryol. work in progress) Cleveland, Western Reserve Univ., School of Med., Dept of Anat. * SIPPEL, T. O. Columbus 11, Ohio State Univ., Dept of Anat. KNOUFF, R. A. Chairman * WESTON, I. C. Coll. of Agricult., Dept of Zool. and Entomol. MILLER. D. F. Chairman PRICE, J. W. Prof, of Zool. Dept of Physiol. * KISSEN, A. T. Dept of Veterinary Anat. * VENZKE. W. G. DIESEM, Ch. GROSSMAN, J. * ANDRES, M. Y. PAPP, E. Gambler, Kenyon College * THORNTON, C. S. Obcrlin, Oberlin Coll., The Coll. of Arts and Sci., Dept of Zool. ROGERS, K. T. Oxford, Miami Univ., Dept of Zool. * HARRISON. J. R. OKLAHOMA (Okla) Oklahoma City, 801 N.E.. 13th St, Univ. of Oklahoma, School of Med., Dept of Anat. LACHMAN, E. Chairman RICHTER,> K. M. Assoc. Prof. OREGON (Ore.) Corvallis, Oregon State Coll., Dept of Zool. HILLEMANN, H. H BIRGE, W. J. Portland 3, Univ. of Portland, U.S.A. (Pa) Coll. of Sci., Physiol. Lab. WHEELER, A. J. Instr. PENNSYLVANIA (Pa) Bryn Mawr, Bryn Mawr Coll., Dept of Biol. GARDINER, Miss M. Dir. * OPPENHEIMER, Miss J. M. Prof. Havcrford, Haverford Coll., Dept of Biol. LOEWY, A. G. Chairman * FINGER, I. Asst Prof. * GREEN, Mrs E. UFFORD Res. Assoc. Philadelphia 4, Univ. of Pennsyl- vania, School of Med., Dept of Anat. FLEXNER, L. B. Prof., Chairman CLARK, E. R. Prof. (Emer.) WILLIAMS, R. G. Prof. HOGUE. Miss M. J. Assoc. Prof. (Emer.) PIATT, J. Assoc. Prof. LIU, C. N. Asst Prof. WILLIAMS, S. C. Assoc. Prof. HOLTZER. H. Assoc. School of Dentistry, Dept of Pathol. * WILDE. Ch. E., }r Dept of Zool. HEILBRUNN. L. V. Prof., Dir. FLICKINGER, R. A. Prof. NELSEN. O. E. Prof. PARMENTER. C. L. Prof. BOREI, H. G. Philadelphia 11. Fox Chase, 7701 Burholm Ave. Lankenau Hosp. Res. Inst, and Inst, for Cancer Res., Dept of Embryol. REIMANN, S. P. Dir. KING, T. J. Res. Assoc. GRANT, Ph. Pittsburgh 13. Univ. of Pittsburgh, School of Med.. Dept of Anat. LANSING. A. I. Chairman DONALDSON. J. C. Prof. * HUMPHREY. Miss T. Prof. * GRABOWSKI, C. T. Instr. Pittsburgh 19. Duquesne Univ., Dept of Biol. (Embryol. Div.) 131 U.S.A. (Pa) * HECKERMAN. R. O. Sclinsgrovc, Susquehanna Univ., Biol. Ucpt. * AMY. R. L. PUERTO RICO (PR.) San Juan, N.I.N.D.B., School of Med., Lab. of Perinatal Physiol. * BAILEY, C. J. Proj. Leader * RAMIREZ DE ARELLANO, Miss M. I. R. * RANCK, J. RHODE ISLAND (R.L) Kingston, Univ. of Rhode Island, Dept of Zool. * HARTUNG, E. W. Prof., Head of Dept Providence 12, Brown Univ., Arnold Biol. Lab. * WILSON, J. W. Prof., Head of Dept * CHASE, H. B. Prof. EDDS, M. v.. Jr Prof. * WEISZ. P. B. Prof. * GOSS. R. J. Asst Prof. SOUTH CAROLINA (S.C.) Coliunbia, Univ. of South Carolina, Dept of Biol. LOVELACE, Miss L. R. TENNESSEE (Tcrni.) Knoxvillc, Univ. of Tennessee, Dept of Zool. & Entomol. * ERASER, R. C. Memphis 3. Univ. of Tennessee, Fac. of Biol. Sci., Med. Units Div.. Div. of Anat. * ALDEN, R. H. Chief of Div. * ROBERTSON, G. G. Prof. * FITZGERALD, L. R. Asst Prof. * COHN. S. A. Asst Prof. * CORLISS. C. E. Instr. Oak Ridge, P.O. Box Y, Oak Ridge Nat. Lab.. Biol. Div.. Mammalian Genetics and Development Section RUSSELL. W. L. Head RUSSELL. Mrs L. BRAUCH MAJOR. Mrs M. HENDERSON Asst TEXAS (Tex.) Galveston, Univ. of Texas, Med. U.S.A. (Wash.) Branch, Dept of Anat. DUNCAN, D. Dir. * SINCLAIR. J. G. Prof. BLOUNT, R. F. Prof. * McNUTT, C. W. Prof. Houston 25, P.O. Box 20068, Univ. of Texas Dental Branch, Dept of Anat. KIRSCHBAUM. A. Prof.. Head of Dept BROWNING, H. C. Assoc. Prof. * GONZALES, F. Asst Prof. WRAGG, L. E. Instr. WISWELL. O. B. Asst Prof. YOLLICK. B. L. Asst Prof. HIGGINS, G. M. Visiting Prof. San Antonio 7, Rob't B. Green Hos- pital MANHOFF, L..Jr UTAH Salt Lake City 1, Univ. of Utah, Div. of Biol., Dept of Genet, and Cytol. NEWBY, W. W. Head of Dept VERMONT (Vt) Burlington, Univ. of Vermont, Coll. of Med.. Dept of Anat. * STULTZ. W. A. VIRGINIA (Va) Charlottesville, The Univ. of Vir- ginia, Dept of Biol. * DENT, J. N. Assoc. Prof. School of Med.. Dept of Anat. * McKEEHAN, M. S. * DECK, J. D. Richmond 19, Coll. of Virginia, Dept of Anat. * REAMS, W. M.. Jr WASHINGTON fWash.) Seattle 5. Univ. of Washington. Dept of Zool. TARTAR. V. School of Med.. Dept of Anat. * ROOSEN-RUNGE. E. C. BOYDEN, E. A. Visiting Prof. of Anat. 132 U.S.A. (Wash. S. America (Chile) BLANDAU. R. J. * BODEMER, C. W. Fisheries Center * WELANDER. A. D. WEST VIRGINIA (W,Va) Morgantown, West Virginia Univ. Med. Center, School of Med.. Dept of Anat. * REYER, R. W. * BOYER, C. C. * NORMAN. C. WISCONSIN (Wis.) Madison 6, The University of Wis- consin. Bardeen Med. Labs, Dept of Anat. MORTENSEN, O. A. Chairman * BAST, T. H. Prof. * MOSSMAN, H. W. Prof. * ORSINI, Mrs M. WARD Madison 6, The University of Wisconsin, Dept of Zool. * AUERBACH. R. Milwaukee 3, 1217 West Wiscon- sin Ave, Marquette Univ., Dept of Biol. * REIS, R. H. Assoc. Prof., Head of Dept STEIL, W. N. Prof. * O'BRIEN, J. P. Assoc. Prof. * SAUNDERS, J. W. Assoc. Prof. Dept of Physiol. * RIECK. A. F. CENTR. AMERICA MEXICO Mexico D.F.. Ciudad Universitaria, Instituto de Biologia LLAMAS. R. Dir. " SAMANO BISHOP. Miss A. Mexico D.F., Apartado Postal 8109, Univ. Nac. Auton., Inst, de Estudios Med. y Biol. GONZALEZ GUZMAN. I. Dir. * GONZALEZ-RAMIREZ. J. S.AMERICA ARGENTINA Buenos Aires, Bolivar 1128, Minist. de Salud Publ. de la Nac, Centr. de Investig. DEL CONTE, E. Dir. Tucuman, Miguel Lillo 205, Univ. Nac. de Tucuman. Fac. de Ci. Biol.. Inst, de Zool. CEI, J. M. Dir. PISANO. A. Prof. Embryol. Tucuman, Casilla de Correos 193, Inst, de Biol. Gener. y Embryol. * BARBIERI. I. BRASIL Belo Horizonte M.G.. Caixa Postal 253. Univ. de Minas Gerais. Fac. Filos.. Inst, de Biol. * SCHREIBER. G. Prof. Zool. Recife, Caixa Postal no. 616, Univ. do Recife. Faculdade de Me- dicina, Cadeira de Histol. e Embryol. MENDONgA, H. Prof.. Head * AZOUBEL, R. Sao Paulo, Univ. de Sao Paulo, Faculdade de Medicina de Ribeirao Preto LISON. L. Sao Paulo, Univ. de Sao Paulo, Caixa Postal 2921, Dept Histol. y Embriol. JUNQUEIRA, L. C. Prof. CHILE Santiago, Av. Irarrazaval 849. Dept de Med. Exper. del Servicio Nacio- nal de Salubridad LIPSCHUTZ, A. Prof., Dir. Santiago, Casilla 2988, Univ. de Chile, Fac. de Med., Inst, de Biol. ..Juan Noe" NEGHME. A. Prof., Dir. BRIONES. H. HOECKER S., G. 133 S. America (Uruguay) URUGUAY Montevideo, Fac. de Med.. Dept de Histol. y Embriol. BU550, W. Prof., Dir. Asia (Israel) VENEZUELA Merida, Univ. de Los Andes, Fac. de Ci. Med.. Dept of Anat. * KLEISS, E. Prof, of Anat., Embryol. & Biol. * RENGEL S.. L. Prof. ASIA CEYLON Colombo 8. Kynsey Rd, Univ. of Ceylon, Fac. of Med., Dept of Anat. CHANMUGAM, P. K. Dir. KANAGASUNTHERAM. R. Lect. in Anat. CHINA Hzmgchow, Nat. Univ. of Chekiang. Dept of Biol. KIANG. H. M. Prof. CHOW, P. S. Lect. Peiping, Ching Shan Tung Chieh, Nat. Univ. of Peking. Coll. of Sci.. Dept of Zool. LI. J. C. Prof. Shanghai, 320 Yo Yang Road, Acad. Sinica, Inst, of Exper. Biol., Lab. of Developm. Physiol. PAI. S. Dir. of Inst. TUNG, T. C. Vice Dir. CHUANG HSIAO HUI Res. Fellow YAO. T. Res. Fellow Tsingtwo, Marine Biol. Lab. TUNG, T. C. HONG KONG Hong Kong, Univ. of Hong Kong, Dept of Zool. STRAHAN. R. INDIA Allahabad, U.P., Allahabad Univ.. Zool. Dept SRIVASTAVA, M. D. L. Amritsar, Punjab, Med. Coll. * JIT. I. SINGH. B. Asst Prof. CHOPRA, R. P. Sen. Dem. CHARNALIA, V. M. Sen. Dem. SINGH. S. Dem. MUCKERJEE, R. N. Dem. Bangalore 1 , Univ. of Mysore, Cen- 134 tral Coll., Dept of Zool. * SRINIVASACHAR, H. R. Calcutta 12, College Street, Presi- dency Coll., Dept of Zool. * MOOKERJEE, S. Prof.. Head of Dept * BOSE, A. Res. Fellow * HAJRA. B. Res. Fellow * SANYAL, S. Res. Fellow * GANGULY, B. .Res. Fellow * NAGARAJAN, S. N. Res. Fellow * MITRA, S. Hon. Res. Fellow * ADHIKARI, S. P. G. Stud. * BALASUBRAMANIAM, K. Stud. * WAIDYASEKARA. L. Stud. * NURJAHAN, Miss B. Stud. * SINHA, A. Stud. * BOSE, Miss A. Stud. * CHOWDHURY. Miss M. Stud. * ALAMELU, Miss M. G. Hyderabad, Osmania Univ., Med. Coll., Dept of Anat. * JAYA. Miss Y. Poena, Univ. of Poona, Zool. Dept MOGHE, M. A. Head of Dept INDONESIA Bandung, Djl. Taman Sari 64, Fak. Ilmu Pasti dan I. Alam. Bagian Zoo- logy * TISNA-AMIDJAJA, D. A. Djakarta, Salemba No. 6, Univ. Indonesia, Fakultas Kedokteran, Bag. Ilmu Djaringan Tubuh SUKIRNA. M. Prof. ISRAEL Jerusalem, The Hebrew Univ., Dept of Zool. HAAS. G. Prof., Head * STEINITZ, H. Israel Japan * EYAL— GILADI. Mrs H. * SHULOV. A. * BOSCHWITZ, Miss B. D. REICH, K. SOBEL, Mrs H. GOLDSCHMIDT, Mrs E. WAHRMAN, J. * PENER. M. P. * MEDINA. I. Hadassah Med. School, Dept of Anat. * GITLIN, G. Rchovoth, Weizman Inst, of Sci., Dept of Exp. Biol. * FELDMAN, M. * YAFFE, D. JAPAN Fukuoka, Kyushu Univ., Fac. of Sci., Dept of Biol. * KAWAKAMI, I. Prof. * KAWAKAMI, Mrs K. I. * MIFUNE, S. * TAMANOI, I. * OKANO, H. SASAKI. N. YAMANA, K. Fac. of Agric, Zool. Lab. HIRAIWA. Y. K.. Prof, of Zool. Gifu, Gifu-ken, Naka-cho. Gifu Univ., Dept of Agr.. Lab. for Zool. * CHISHIMA. K. Prof, of Zool. Hakodate, Hokkaido Univ., Fac. of Fish., Dept of Biol., Lab. of Fresh- water Fish Culture * YAMAMOTO, K. Prof. KUBO, T. Asst Prof. TAKANO. K. Asst Hiraka City, Osaka-Pref.. Osaka Dental Coll. * SHIN-IKfi. T. Hiroshima, Higashisenda-cho, Hiro- shima Univ.. Fac. of Sci., Zool. Lab. KAWAMURA. T. Prof. MINAMORI, S. YAGIU. R. SAMBUICHI. H. Ikeda, Osaka-Pref.. Osaka Liberal Arts Univ.. Lab. of Morphol. * NAKAMURA, O. Prof. * TAHARA. Y. Lect. Kanazawa, Univ. of Kanazawa, Fac. of Sci., Zool. Inst. * KIDO, T. Asst Prof. Med. School, Dept of Pathol. * ISHIKAWA.T. * INOUE, K. KURATA, Y. Kobe, Kobe Univ., Biol. Inst. * FUJII, S. Prof. KAWABE, M. Asst Prof. KIMOTO, Y. Asst KANEHISA, T. Asst Kobe, Kurokami-cho, Konan Univ., Dept of Lit. and Sci., Biol. Lab. * TAKAYA, H. Prof. * KAJI, S. Lect. * MASUI, Y. Asst * WATANABE, T. Res. Stud. Kochi, Kochi Univ., Fac. of Educa- tion TOSHIKO, Miss K. Prof.. Dir. OIKAWA, Miss I. Asst Prof. Kofu, Yamanashi Univ., Biol. Dept * SIRAKAMI, K. L Kumamoto-shi, Kumamoto Univ., Fac. of Sci., Dept of Biol. * ITO, S. * YOSHIKURA, M. Kyoto, Sakyo-ku, Univ. of Kyoto, Fac. of Sci., Zool. Inst. IMAIZUMI, T. * SHIOMI. T. Lab. of Embryol. and Exp. Morphol. * ICHIKAWA, M. Prof., Dir. * KATO, M. Asst Prof. * IKUSHIMA, N. Lect. * OKADA, T. S. Asst * NISHIITSUTSUJI— UWO, Mrs J. Asst * KATO, K. Res. Stud. Kyoto, Shimogamo, Saikyo Univ., Biol. Lab. * NAKANE, T. Maebashi, Gunma Univ., Anat. Inst. * TAKISAWA, A. Prof. * SENO, T. Matsue, Shimane-ken, Shimane Univ., Dept of Biol. YANAI, T. Prof. OUJI, M. Lect. 135 Japan Matsumoto City, Katakura Sericul- tural Experiment Station FUKUDA. S. Misaki, Kanagawa-ken, Misaki Marine Biol. Station * HIRAMOTO, Y. * KANATANI. H. Nagasaid, Nagasaki Univ., Fac. of Med., Anat. Dept SATOH, J. Prof. * KOONO, J. Asst Nagoya, Tashiro-Cho, Chigusa-Ku, Nagoya Univ., Fac. of Sci.. Biol. Inst. * YAMADA. T. Prof., Dir. SATO, T. Prof. * YAMAMOTO. T. Prof. * HAYASHI, Y. Lect. * KAJISHIMA. T. Lect. * NAKANO. E. Lect. * TAKATA, K. Lect. * OSAWA, S. Asst * HISHIDA, T. Asst * OKAZAKI, R. Res. Assoc. * AKETA, K. Asst * TOMITA, H. * KARASAKI, S. * KATO, M. Asst * TAKATA. Miss C. * EGUCHI. G. Res. Assoc. * OKAZAKI. T. * TAKEUCHI. K. * ANDO. S. Nagoya, Furo-Cho. Chikusa-Ku. Nagoya Univ.. Res. Inst, of Envi- ronmental Medicine * MURAKAMI. U. Niigata, Niigata Univ., Fac. of Sci.. Biol. Inst. * IWASAWA. H. Osaka, Higashisumiyoshiku, Hirano. Osaka Lib. Arts Univ. * SUGINO. H. Prof. Osaka, Kita-ku. Minami-Ogimati. Osaka City Univ., Inst, of Poly- technics, Lab. Exp. Embryol. ASAYAMA. S. Prof. MIYAMORI— YAMAMOTO. Mrs H. Asst TAKAMOTO. K. Asst AMANUMA. A. Asst 136 Japan Osaka, Sakai. Naniwa Univ.. Dept of Biol. MASUDA, H. Sapporo, North 8, West 5. Hokkaido Univ.. Fac. of Sci., Zool. Inst. * MAKINO, S. Prof. * ICHIKAWA. A. Prof. MOMMA, E. Asst Prof. * KANOH, Y. Asst Prof. AOTO. T. Asst Prof. TONOMURA, A. Asst * YAMAMOTO. T. S. Asst Shizuoka City, Oiwa 2, Shizuoka Univ., Biol. Inst. * YANAGISAWA, T. Asst Prof. Sendai, Katahira-cho, Tohoku (Im- perial) Univ.. Inst, of Biol,. Lab. of Embryol. MOTOMURA. I. Prof.. Dir. Toba, Mie-ken, Sugashima-cho. Na- goya Univ., The Sugashima Marine Biol. Stat. * SUGIYAMA. M. Dir. ' ISHIKAWA, M. Asst * KOJIMA— KUNO, M. Asst Tokushima, Tokushima Univ., Fac. of Lib. Arts and Sci., Biol. Inst. OKADA, K. Prof. Tokyo, Daito-ku, Ueno-Park, Nat. Museum of Nat. Sci. OKADA, Y. K. Prof. Tokyo, Itabashi-ku. no. 724 Ooya- guchimachi, Nihon Univ., Med. Fac, Anat. Inst. NAKAYAMA. T. Tokyo, Setagaya-ku, Tokyo Metro- politan Univ., Fac. of Sci.. Dept of Biol.. Embryol. Section * DAN, K. Prof., Head of Sect. * DAN, Mrs J. C. Lect. * OKAZAKI, Miss K. Res. Asst * KAWAMURA, K. Res. Asst * SAKAI. H. * HAJIMA, H. Tokyo, Bunkyoku, Otsuka-Kubo- machi 24, Univ. of Education, Inst, of Zool. OKA. H. Prof.. Head Tokyo, Hyakunin-cho. 400. Shin- juku, Research Inst, for Nat. Resour- ces Japan Australia MAWATARI, Sh. Tokyo, Suginami, Koenji, Sericultu- ral Exp. Station, Physiol. Dept * TAKAMI, T. * ITO, T. Tokyo, Bunkyo-ku, Ochanomizu Univ., Fac. of Sci., Zool. Lab. KUME, M. Tokyo, Komaba, Meguro-ku, Univ. Fac. of Sci., Zool. Inst. * FUJII, T. Prof. * KINOSITA, H. Prof. * ISHIDA, J. Prof. Tokyo, Komaba, Meguro-ku, Univ., of Tokyo, Coll. of Gen. Education, Biol. Inst. * NUMANOI. H. Tokyo, Bunkyo-ku, Yushima 3, Tokyo Med. and Dental Univ., Dept of Anat. * NIIZIMA, M. NAKAMURA, I. TAKAGI, A. KASAI, T. KITAMURA, H. Toyama, Toyama Univ., Fac. of Liberal Arts, Biol. Inst. * HORI, R. Tsu-City, Mie-Pref., Mie Prefectural Univ.. Fac. of Fisheries, Zool. Inst. * SHIINO, S. M. OOISHI. Miss S. Yamagata, Koshirakawa-machi, Yamagata Univ., Fac. of Lib. Arts and Sci., Dept of Biol. * HANAOKA, K. I. Prof. Yokohama, Hiyoshi, Keio Univ., Biol. Lab. * MORI, Y. Prof., Head of the Biol. Inst. * MORI, H. Prof. * HAMA, T. Prof. * GOTO, T. Lect. * OBIKA, M. Asst * MATSUMOTO. J. Asst * ENDO, Y. Lect. * KATAKURA, Y. Lect. LEBANON Beirut, American Univ., Dept of Biol. * BUTROS, J. M. Assoc. Prof. * GLADE, R. W. Asst Prof. PAKISTAN Dacca, Dacca Univ., Dept of Zool. SHAFIQ, S. A. Lahore, Government Coll., Dept of Zool. * ISLAM, A. * ARSLAN, M. THAILAND Bangkok, Univ. of Medical Sci., Fac. of Med. and Siriraj Hosp., Dept of Anat. * SANGVICHIEN. S. TURKEY Ankara, Ankara Univ., Veter. Fac, Inst, of Histol. and Embryol. ERENgiN, Z. Prof. HASSA, O. (no embryol. work in progress) Med. Fac, Inst, of Histol. and Embryol. MUTLU, Mrs K. Prof., Dir. BUYOKOZER, Miss I. Asst (no embryol. work in progress) Istanbul, Siileymaniye-Miiftuluk, Zool. Inst. SEVKET GIZ, F. Prof. Istanbul-Beyazit, Univ. of Istanbul, Histol.-Embryol. Inst. CLARA, M. Prof. (no embryol. work in progress) AUSTRALIA AUSTRALIA NEW SOUTH WALES Armidale, The New England Univ., Dent of Zool. * STOCK, A. Sen. Lect. * O'FARRELL, A. F. * MORGAN, Miss J. A. Res. Asst * RAE— WICKHAM, Mrs C. A. Prospect, Great Western Highway, (P.O. Box 144, Parramatta), Div. of Anim. Health and Product., Com- 137 Australia monwealth Sci. and Industr. Res. Org.. Sheep Biol. Lab. McDonald, l w. off. in Charge * LYNE. A. G. Res. Off. * SCHINCKEL, P. G. Princ. Res. Off. * SHORT. B. F. Sen. Res. Off. * ALEXANDER, G. Sen. Res. Off. * BRADEN, A. W. H. Sydney (c/o Univ. of Sydney. Dept of Zool.) Commonwealth Sci. and Industr. Res. Org., Animal Genet. Sect. RENDEL. J. M. Off. in Charge ERASER, A. S. Princ. Res. Off. SOBEY, W. R. Sen. Res. Off. Sydney, Univ. of Sydney, Dept of Zool. MURRAY, P. D. F. Prof.. Dir. SULLIVAN. G. E. STEPHENSON, N. G. WISELY. Miss V. M. Dept of Histol. and Embryol. STUMP. C. W. Dir. CLELAND, K. W. O'BRIEN, B. R. A. REID, B. L. QUEENSLAND Brisbane, Yeerongpilly, Fairfield Rd, Univ. of Queensland, School of Europe (Belgium) Veter. Sci. .Dept of Veter. Anat. 6 Parasitol. * TUCKER. R. SOUTH AUSTRALIA Adelaide, Univ. of Adelaide, Dept of Anat. PACKER, A. D. VICTORIA Carlton N. 3, Univ. of Melbourne, Anat. Dept * LAVARACK, J. O. School of Botany FISHER, F. J. F. NEW ZEALAND Canterbury, Lincoln Coll., Canter- bury Agric. Coll. HART, D. S. McLEAN, J. W. Prof. Christchurch, Canterbury Univ. Coll.. Dept of Zool. * PERCIVAL. E. * STOUT, V. M. Duncdin, Univ. of Otago, Dept of Zool. * BREWIN. Miss B. I. MARPLES, B. J. Prof. Dunedin, C. 1, Great King Street, Univ. of Otago, Med. School, Dept of Anat. * ADAMS, W. E. Prof. EUROPE AUSTRIA Graz, Universitatsplatz 4, Inst, fiir Histol. und Embryol. ZAWISCH, Miss C. Prof. Innsbruck, Tyrol, Miillerstrasse 59, Histol.-Embryol. Inst, der Univ. * SAUSER, G. Prof., Vorstand * OLBRICH, E. Asst Wien IX. Wahringerstr. 13, Anat. Inst, der Univ. Wien HAYEK. H. Prof., Dir. " ZENKER, W. * PRIESCHING, A. BELGIUM Bruxelles, 50 Av. F. D. Roosevelt. Univ. libre de Bruxelles, Fac. des Sci.. Inst, de Zool. Torley-Rousseau, Lab. de Zool. BRIEN, P. L. Prof., Dir. HERLANT— MEEWIS, Mrs H. Chef de Trav. RASMONT. R. Asst BOUILLON, J. Asst RENIERS— DECOEN, Mrs M. Technic. Bruxelles, 97 Rue aux Laines. Fac. de Med. de I'Univ., Lab. d'Anat. et d'Embryol. * DALCQ, A. M. Prof., Head of Dept 138 Belgium Denmark * PASTEELS. J. J. Prof. * MULNARD, J. Asst * MILAIRE, J. Bruxclles-Auderghem, 1850 Chaus- see de Wavre, Univ. libre de Bru- xelles, Lab. de Morphol. anim. * BRACKET, J. L. A. Prof.. Dir. * FICQ, Mrs A. A. Asst * BALTUS, Miss E. Asst * VANDERHAEGHE, Mrs F. Asst * TENCER. Miss R. Gent, Bylokekaai 1, Univ. of Gent, Fac. of Med., Lab. of Anat. FAUTREZ, J. C. Prof., Dir. FAUTREZ— FIRLEFYN, Mrs N. J. VAKAET, J. C. ANTEUNIS, Miss A. COLLE— van der VELDE. Mrs A. Lab. of Histol. and Embryol. SEBRUYNS, M. Gent, Universiteitstr. 14, Lab. voor Zool., Afd. Morphol. * DE CONINCK, L. A. P. Prof. * RUBLE, J. * DENUCE, J. M. Liege, Quai Ed. Van Beneden 22, Inst. Zool. Ed. van Beneden, Dept de Morphol. des Chordes * DAMAS, H. F. C. Prof. * DENIS, H. A. Asst Liege, 20 Rue de Pitteurs. Univ. de Liege. Fac. de Med., Lab. d'Histol. et d'Embryol. CHEVREMONT, M. Prof. CHeVREMONT— COMHAI- RE, Mrs. S. Chef de Travaux FIRKET, H. Chef de Travaux FREDERIC J. Asst BAECKELAND, E. Asst Louvain, 38 Rue des Recollets, Univ. de Louvain, Inst. d'Anat. * CAMPENHOUT, E. van Prof., Dir. Louvain, 71 Rue de Namur, Univ. de Louvain, Inst, de Zool., Lab. d'Embryol. VANDEBROEK, G. Prof. Dir. * SMET, W. M. A. de BULGARIA Sofia 13, Blwd Lenin N. 2. Univ. of Sofia, Med. School, Inst of Gener. Biol. DIMITROWA. Miss A. I. Asst CZECHOSLOVAKIA Plzen, Karlovarska 48, Charles Univ., Fac. of Med., Inst, of Histol. and Embryol. * SLABY, O. Prof., Dir. * SLIPKA, J. * MATEJKA, M. Praha II, Vinicna 7, Charles Univ., Zool. Inst., Dept of Gener. and Exp. Zool. * SLADECEK, F. Charge des cours * ROMANOVSKY, A. Asst Praha II, U nemocnice 3, Charles Univ., Dept of Anat. * LEMEZ, L. * RYCHTER, Z. Praha II, Albertov 4, Univ. Karlovy, Embryolog.ustav lekafske fak. FRANKENBERGER. Z. Prof.. Dir. * VACEK, Z. Chief Asst DENMARK Copenhagen 0, Universitetsparken 3, Inst, for Aim. Zool. * BR0NDSTED, H. V. Prof.. Dir. WINGSTRAND, K. G. Prof. * HOLST CHRISTENSEN, P. Amanuensis * PEDERSEN, K. J. Asst Copenhagen N, 16 Tagensvej, Biol. Inst, of the Carlsberg Foundation * ZEUTHEN, E. * PLESNER. P. * HAMBURGER, K. Copenhagen, Valby, 10 Gl. Carls- bergvej, Carlsberg Lab., Physiol. Dept HOLTER, H. Head (no embryol. work in progress) 139 Finland France ENGLAND (Vid. UNITED KINGDOM) FINLAND Helsinki, Univ. of Helsinki. Fac. of Med.. Inst, of Anat. HJELMMAN. G. Prof., Dir. MUSTAKALLIO. M. Prosector * LYDECKEN, K. Helsinki, P. Rautatiekatu 13, Univ. of Helsinki, Zool. Lab. SUOMALAINEN, P. Prof., Dir. of Lab. * TOIVONEN, S. L Proi. * KUUSI. Miss T. K. * SAXEN, L. O. PESONEN. S. K. * VAINIO, E. T. FRANCE Bordeaux, Univ. dc Bordeaux, Fac. de Med., Lab. d'Histol. et d'Embr. MAYER, G. Prof. Clermont-Ferrand, 1 Av. Vercinge- torix. Lab. de Zool. HOVASSE, R. Dir. * LUTZ, H. Prof. * LUTZ— OSTERTAG, Mrs Y. Chargee de Recherches * GOMOT. L. Attache de Recherches Marseille, Place Victor Hugo, Lab. de Zool. gen. de la Fac. des Sci. et Stat, marine d'Endoume (Marseille) ABELOOS, M. Prof., Dir. Nancy (Meurthe & Moselle), 31 Rue Lionnois, Fac. de Med. de Nancy, Inst. Anat., Lab. d'Anat. BEAU, A. A. Prof. Lab. d'Histol. et Embryol. LEGAIT, E. Prof., Dir. * DOLLANDER, A. Agr. * GRIGNON, G. Asst de trav. prat. * CURY. G. Cherch. libre * BROUANT, J. F. Stud. * MARCONNET. R. Stud. Nancy, (Meurthe & Moselle), 30 Rue Sainte Catherine, Lab. de Phy- siol. Gener. * GAYET, J. F. Prof. HO * SCHWANDER. J. * BONICHON. Miss A. Nantes, (L.-Atl.), 16 Quai Mon- cousu, Fac. de Med., Lab. d'Histol. * TUSQUES, J. M. Prof. Agrege Nogent sur Mame (Seine), 49bis Avenue de la Belle-Gabrielle, Col- lege de France, Lab. d'Embryol. du C.N.R.S. * BENOIT, J. A. A. Paris Ve, 1 1 Place Marcelin Ber- thelot, College de France, Lab. d'Histophysiol. * BENOIT, J. Prof. * LEROY, P. J. M. * TIXIER— VIDAL, Mrs A. Agr. * MOSZKOWSKA, A. Lab. de Morphol. exper. et Endo- crinol. COURRIER, R. Prof. Lab. d'Embryol. exper. du College de France, et Lab. d'Embryol. et de Teratol. exper. du C.N.R.S. * WOLFF, Et. C. Prof.. Dir. * FAURfi-FREMIET, E. Prof, honor. * WOLFF, Mrs Em. Maitre de Recherches * LENDER, Th. MaTtre de Con- ferences a la Fac. des Sci. * SENGEL, Ph. Sous-Directeur du laboratoire du College de France * SALZGEBER, Miss B. Chargee de Recherches * STRUDEL. G. * SCHEIB— PFLEGER. Mrs D. Chargee de Recherches BENOIT. J. Chargee de Recherches * STENGER— HAFFEN, Mrs K. Chargee de Recherches * KIENY, Mrs. M. A. Chargee de Recherches * SIGOT, M. Asst au laboratoire du College de France * KIRRMANN, J. M. Attache de Recherches * HAMPfi, A. Prof. Agrege des Sci. Nat. France France SCHNEIDER, Miss N. Boursiere Americaine de la Fondation Fulbright * LieVRE, Miss Fr. Attachee de Recherches * REYSS— BRION. Mrs M. Attachee de Recherches GOUBE, P. * CROISILLE, Y. Biol, au C.N.R.S. * MARIN— LEWIN, Mrs L. Attachee de Recherches BERMANN, F. Stagiaire de Recherches CALAME, Miss S. Biol, au C.N.R.S. * HAMARD, Miss M. Paris Ve, 1 Rue Victor Cousin, Fac. des Sci., Lab. d'Anat. et d'Histol. comp. * DEVILLERS, Ch. Prof. * FRANgOIS. Y. Paris Ve, 13 Rue Pierre Curie, Inst, de Biol. Physicochim. * LALLIER, R. A. Paris Ve, 12 Rue Cuvier, Univ. de Paris, Fac. des Sci., Lab. d'Embryol. GALLIEN, L. Prof., Dir. du serv. HOUILLON, Ch. Chef de trav. Pavilion Curie, Lab. de Biol. Ani- male * MAY, R. M. Prof. * THILLARD, Miss M. J. Asste Paris Ve, 55 Rue de Buffon, Museum Nat. d'Hist. Nat., Lab. de Zool. FACE, L. Dir. * FRIANT, Mrs M. Sous-Dir. Paris Ve, 12 Rue Cuvier, Univ. de Paris, Fac. des Sci., Lab. de Physiol, comp. * JOST, A. D. Prof., Dir. JAQUOT. R. Asst PICON, L. Asst GELOSO, J. P. Asst COHEN. Miss A. ROFFI, J. Paris Vie, 45 Rue des Sts Peres, Fac. de Med. Nouvelle, Lab. d'Embryol. * GIROUD, A. Prof., Dir. * MARTINET, Mrs M. * PARRANT, M. Stomatol. des Hopit. * HUYGNARD. C. * LEFEBVRES— BOISSELOT, Mrs J. t LELIfiVRE, A. Anc. Chef de Trav. * ROUX, C. Asst Lab. des Travaux Anat. * DELMAS, A. Prof.. Dir. * OLIVIER, G. * EYRIES. Ch. * QUeNU, L. * QUEREUX. P. * DELGADO, R. * TARNUS, J. L. * PINEAU, H. Paris Vie, 105 Boulevard Raspail, Fac des Sci. de Paris, Lab. d'evolu- tion des etres organises GRASSe. p. p. Dir. MIALHE, P. Asst GONTCHAROFF, Miss M. LECAMP, M. Paris Xllle, 111 Rue L. M. Nord- mann, Univ. de Paris, Hopital Broca, Ecole Prat, des Hautes Etudes, Lab. d'Hormonol. et Cytol. exper. * MORICARD. R. Dir. * GOTHIE, Miss M. M. C. S. * BAIOCCHI, O. * BELAISCH, J. Poitiers, Vienne. Fac. des Sci., Lab. de Zool. * LARAMBERGUE, M. de Prof. * LEGRAND, J. J. Prof. MICHON. J. Chef de Trav. * VOY, A. Chef de Trav. ALAPHILIPPE, F. Asst CHAIGNEAU, J. Asst * JOHNSON, G. Cherch. C.N.R.S. Roscoff (Finistere), Station Biol. * DEROUX, G. Chef de Travaux Sannois (Seine-et-Oise), Quartier des Vieux Moulins, Lab. de I'lnst. Pasteur * RAYNAUD, A. 141 France Strasbourg, 12 Rue de lUniversite, Univ. de Strasbourg, Fac. des Sci., Lab. de Zool. et Embryol. exper. * VIVIEN. J. H. Prof. Dir. * STEPHAN. Fr. M. de Cf., Sous-Dir. * STEPHAN— DUBOIS. Mrs Fr. M. de R.. Asste * FOLLENIUS. E. Asst * THIEBOLD. J. J. Asst MELLINGER, J. Asst * MOHSEN. T. Attch. de Rech. * RECHENMANN, R. Attch. de Rech. RUHLAND— GAISER, Mrs. M. L. Attch. de Rech. * SCHOTT, Miss J. Attch. de Rech. * SIMON— WITTERSHEIM. Mrs D. Attch. de Rech. * STEFAN. Miss Y. Stag, de Rech. * STENGER— HAFFEN. Mrs K. Attch. de Rech. * WENIGER, J. P. Attch. de Rech. BROQUARD, Miss M. Cherch. hbre * HAMPE, a. Cherch. libre * HAY, D. * SCHEIB— PFLEGER, Mrs D. Lab. de Biol, gener. * BOUNOURE. L. Prof.. Dir. * SIGOT. A. Chef de Trav. * AUBRY, Miss R. Stag, de Rech. Strasbourg, 1 Place de rHopital, Fac. de Med., Inst. d'Embryol. * VINTEMBERGER. P. Prof. * CLAVERT. J. Prof. * ZAHND. J. P. Talence (Gironde), 40 Rue Lamar- tine, Fac. des Sci. de I'Univ. de Bordeaux, Lab. de Biol. Gener. AVEL, M. Prof., Dir. * CAMBAR, R. Prof. * SCHOELLER, Miss J. Lab. de Zool. et Physiol, anim. AVEL, M. Prof.. Dir. * HAGET, A. Maitre de Confer. * RAZIMBAUD. Miss J. 142 Germany Villc d'Avray (Seine-et-Oise), 29 Rue Pradier * ROSTAND, J. GERMANY Bonn, Zool. Inst, der Univ., Ent- wicklungsgeschichtl. Abt. * WURMBACH. H. Prof. KRAICZICZECK. M. HAARDICK. H. SCHNEIDER, L. ERHARD. R. P. CLAES, H. Darmstadt, Zool. Inst, der Techni- schen Hochschule * LUTHER. W. Prof. * HESS. O. Res. Fellow Frankfurt/Main Siid, Ludwig Rehn- str. 14. Med. Fak. der Univ., Dr Senckenbergisches Anat. Inst. STARCK, D. Prof.. Dir. ORTMANN. R. Prof. FRICK, H. Asst SCHNEIDER, R. Asst Freiburg i. Brsg., Katharinenstr.20, Univ. Freiburg, Naturwiss. Mathem. Fak., Zool. Inst. KOEHLER, O. Prof., Dir. LODTKE, H. Wiss. Asst SCHNETTER, M. Wiss. Asst STARK, O. J. Wiss. Asst Gottingen, Burgstr. 51, Med. Fak., Anat. Inst, der Univ. Gottingen * BLECHSCHMIDT, E. Prof., Dir. * GRAUMANN, W. Ob. Asst * HINRICHSEN, K. Asst * FERBER-SCHMIDT, L. von Grottingen, Bahnhofstr. 28, Univ. Gottingen, Mathem. Naturwiss. Fak., Zool. Inst. t HENKE, K. Prof., Dir. PIEPHO, H. Kustos Hamburg 20, Schottmiillerstrasse 1, Univ. Hamburg, Med. Fak., Anat. Inst, ZEIGER, K. Dir. * BAUTZMANN, H. Prof., 1 Prosektor * SCHRODER, R. K. P. Germany Italy Hamburg, Altonaer Krankenhaus, Abt. fiir innere Medizin * SCHRODER. R. K. P. Hamburg 36, Holstenwall 24, Inst, fiir Fischereibiol. der Univ. * HARDER, W. Heidelberg, Voss-Strasse 3, Inst, fiir exp. Krebsforsch. der Univ. * QUERNER, H. Dozent Heiligenberg ( 1 7b ) , Kreis Ueberlin- gen/Bodensee, Heiligenberg Inst. * MANGOLD, O. Prof., Abt. leiter * WOELLWARTH, C. von Asst * TIEDEMANN, H. Asst * TIEDEMANN— WAECHTER. Mrs H. Asst * PETERS, Th. Asst * BECKER. Miss U. Asst Kiel, Neue Universitat, Haus 30, Anat. Inst, der Univ. Kiel BARGMANN, W. Prof., Dir. * FLEISCHHAUER. K. * HORSTMANN, E. Prof. Koln'Lindenthal, Kerpenerstr. 13, Zool. Inst, der Univ. * KUHN, O. Prof., Dir. * HARTWIG, H. Asst Dozent * ENGLANDER, H. Asst Dozent * ANTON. H.-J. Asst * VAHS, W. Asst * JOHNEN, Miss A. G. Asst * KOECKE, H.-U. Asst Koln-Lindenthal, Gyrhofstr. 1 7, Inst, fiir Entwicklungsphysiol. HARTE, Miss C. Prof. * POHLEY, H.-J. * LOBBECKE. E.-A. Marburg/Lahn, Robert Kochstr. 6, Anat. Inst, der Univ. NIESSING, K. Prof.. Dir. * RETRY, G. Prof. ROLLHAUSER, H. Prof. WENDT, G. G. Asst (Dozent) * OKSCHE. A. A. Asst ZULEGER. S. Asst * ROLLHAUSER— ter HORST. Mrs. J. Guestworker Marburg/Lahn (16), Ketzerbach 63, Zool. Inst, der Univ. * SEIDEL, F. Prof., Dir. Miinchem 15, Pettenkoferstr. 11, Anat. Inst, der Univ. Miinchen LANZ. T. von Prof.. Dir. * DINGLER— HAHL. Mrs E. Ch. Privatdozent * DZIALLAS, P. R. Privatdozent Miinchen 15, Thalkirchnerstr. 36, Pathol. Inst, der Univ. Miinchen * WRBA, H. Privatdozent Stuttgart-Hohenheim, Zool. Inst, der Landwirtschaftl. Hochschule * PFLUGFELDER, O. Prof., Dir. Tiibingen, Wiirttemberg. Spemann- str. 34, Max-Planck-Inst. fiir Biol. * KOHN, A. Prof., Dir. ' SCHWARTZ. V. * SCHNEIDER. D. * ANDRES, G. EGELHAAF. A. * LAVEN. H. Tubingen, Holderlinstr. 12. Zool. Inst, der Univ. Tiibingen * KRAUSE. G. Prof. RISLER, H. Dozent * SANDER, K. Wiirzburg, Rontgenring 10, Univ. Wiirzburg, Naturwiss. Fak.. Zool. Inst. " HUBL, H. Stud. Rat Inst, fiir Angew. Zool. GOSZWALD, K. Prof., Inst. Vorstand KLOFT, W. Asst BIER, K. Asst HUNGARY Pecs, Dischka u 5, Univ. Med. School, Dept of Anat. * SZENTAGOTHAI. J. Prof. * SZeKELY, G. ITALY Ban, Univ. di Bari, 1st. di Zool. LERMA, B. de Prof. Bari, Policlinico, Fac. of Med., Inst, of human Anat. * AMPRINO. R. M. Prof.. Dir. * CAMOSSO, Miss M. E. Asst Bologna, Via S. Giacomo 9, 1st. di Zool. * PASQUINI, P. Prof., Dir. 143 Italy * GHIRARDELLI. E. Prof., Aiuto * STAGNI. Miss A. M. Asst Bologna (103). Via Belmeloro 8. Fac. di Sci., 1st. di Anat. comp. LEGHISSA S. Prof., Dir. * PASQUINI, P. Prof. * RAUNICH, L. Prof.. Guestwor- kcr * MANELLI. E. Asst * ROSSINI. Miss M. C. Asst * MAZZONI— DE CESARE, Mrs I. Techn. MINELLI, G. RAMBALDI. Miss M. Asst Ferrara, Univ. di Ferrara, 1st. di Anat. Comp. * RAUNICH, L. Prof. Ferrara, Via Fossato di Mortara 66, Univ. di Ferrara, 1st. Anat. * MURATORI, G. Prof.. Dir. BATTAGLIA. G. Asst VASCOTTO, A. Asst CHIARINI. C. Asst CARLI, D. B. Techn. Firenze, Via Romana 17. Fac. di Sci., 1st. di Zool. PADOA, E. Prof. Geneva, Univ. di Genova. 1st. di Anat. e Fisiol. comp. REMOTTI, E. Prof., Dir. Genova, Viale Benedetto, Univ. di Genova. 1st. di Anat. Um. norm. ROSSI-DE RUBEIS, F. Prof. Milano, Via Celoria 10, Univ. di Milano, Fac. di Sci., 1st. di Genet. * BARIGOZZI, C. Prof.. Dir. * CASTIGLIONI. Miss M. C. Asst 1st. di Zool. e Anat. comp. * RANZI, S. Prof., Dir. * CIGADA— LEONARD!, Mrs M. Asst * LANZAVECCHIA, G. Asst * LEONE. V. Asst * ROCCA, E. Asst * CITTERIO, P. PAJETTA. Miss E. Asst MALDACEA. Miss L. Milano, Via Mangiagalli 31. Fac. di 144 Italy Med. e Chir. dell'Univ. di Milano, Cattedra di Istol. ed Embriol. gener. * PRETO PARVIS. Mrs V. Prof. * RONCORONI. G. Asst Modena, Via Universita 4. Fac. di Sci., 1st. di Zool. e Anat. comp. * VANNINI, E. Prof.. Dir. * RANZOLI, F. Asst * REGGIANI, Miss M. P. Asst * ROMANI. Miss M. L. Asst * LUGLI. Miss L. Asst. Napoli, Zoological Station DOHRN, P. Dir. BACCI. G. Prof. TARDENT, P. Centro di St. Biol, del C.N.R. NICOLA, Miss H. DE Napoli, Via Mezzocannone 8, Univ. di Napoli, 1st. di Zool. * LA GRECA, M. ' Prof. * SALFI, M. Prof. Padova, Via Loredan 10, Fac. di Sci., 1st. di Zool. e Anat. comp. * D'ANCONA. U. Prof. Dir. * COLOMBO, G. Asst * SABBADIN, A. Asst MARCUZZI, G. Lect. BATTAGLIA. B. Asst * SALA. M. Asst * MARIN, G. Asst Palermo, Via Archirafi 18, Univ. di Palermo. 1st. di Zool. * REVERBERI, G. Prof.. Dir. * MINGANTI, A. Asst * ORTOLANI. Miss G. Asst * MANCUSO, V. Asst * FARINELLA— FERRUZZA. Mrs N. Asst * DURANTE. Miss M. Asst Research workers: * EVOLA— MALTESE, Mrs C. * FISCHIAROLO, Miss G. * RESTIVO, Miss F. Guest-worker: * ALONSO. Miss M. 1st. di Anat. comp. * MONROY, A. Prof.. Dir. * MAGGIO. Miss R. Asst * CfiAS. Miss M. P. Asst * D'AMELIO, V. Asst Italy GIUDICE. G. Res. Asst NASELLI. A. Fellow Min. Publ. Educ. OLIVA, O. A. Techn. Asst Pallanza, 1st. Italiano di Idrobiologia * MIROLLI, M. Parma, Universtita, 1st. di Zool. e Anat. comp. * SCHREIBER. B. Prof.. Dir. Pavia, Via Forlanini 8, 1st. di Anat. umana norm. * BORGHESE. E. Perugia, S. Pietro, Fac. di Med., 1st. di Biol. gen. * SPIRITO, A. Prof., Dir. * CASTIGLI— PITOTTl Mrs M. Aiuto * BONDI. C. Asst CENTAMORI. M. Asst * LIOTTI, F. S. Asst Pisa, Via A. Volta 4, Fac. di Sci., 1st. di Zool. e Anat. comp. dell' Univ. * BENAZZI. M. Prof.. Dir. * LEPORI. N. G. Asst * PAPI, F. Asst * BENAZZI— LENT ATI, Mrs G. * NOBILI. R. Asst Roma, Universita di Roma. Semeio- tica Medica. Policlinico Umberto I * CONDORELLI. M. Asst Roma, Viale Regina Elena 324 (Policlinico), 1st. di Zool. dell'llniv. di Roma * PASQUINI, P. Prof.. Dir. Roma, Via Borelli 50, Univ. di Ro- ma, Fac. di Sci.. 1st. di Anat. Comp. .,G. B. Grassi" * STEFANELLI. A. Prof.. Dir. * BAFFONI, G. M. Asst URBANI— MISTRUZZI, L. Asst * ROSSI, A. Asst ZACCHEI. A. M. Extr. Asst RUSSO-CAIA. S. V. Asst. CORAMALDI, L. v. Asst Siena, Piazza S. Agostino 4, Fac. di Med., 1st. di Biol, e Zool. gen. PADOA, E. Prof.. Dir. OMODEO, P. Asst Torino, Corso Massimo d'Azeglio 52, Netherlands Fac. of Med.. Inst, of human Anat. LORETI. F. Prof., Dir. * LEVI. G. L. Prof. (Emer.), Anc. Dir. * FILOGAMO, G. Aiuto (Lib. Doc.) FRANCESCHINI. M. Asst Torino, Via Giovanni Giolitti 34, Inst, of Comp. Anat. MAZZI. V. Dir. * GUARDABASSI. Miss A. Asst Torino, Via Nizza 52, 1st. di Anat. veteiinaria * GODINA G. Prof.. Dir. GOBETTO. A. Asst NETHERLANDS Amsterdam Z., Rapenburgerstr. 128, Free Calvinistic Univ., Zool. Inst. LEVER. J. Prof. VLIJM. L. Asst SPRONK. N. Asst RICHTER. Miss W. E. Asst (no embryol. work in progress) Amsterdam Z., Pr. Hendriklaan 27, Free Calvinistic Univ.. Anat. -Em- bryol. Lab. * FAASSEN. F. van Dir. HANSMA. H. Asst ROSENDAL. R. Asst * SCHALEKAMP, M. A. D. H. Asst * KUYKEN. M. P. A. Asst * ZWAN, A. van der Asst * DOKTER, H. J. * STAM. F. SCHOLTEN. F. C. Amsterdam O., Mauritskade 61, Municipal Univ. of Amsterdam, Fac. of Med., Anat.-Embryol. Inst. FROE. A. de Dir. * WOERDEMAN. M. W. Prof. * TRAMPUSCH. h. a. L. Chief Asst, Lect. * GATE. G. ten Chief Asst * DOORENMAALEN, W. J. van * JOCHEMS. D. J. * BORDEN. J. van der Amsterdam, Plantage Doklaan 44. Municipal Univ. of Amsterdam, Zool. Lab. 145 Netherlands * SLIJPER. E. }. Prof., Dir. Amsterdam, Herseninstituut BOK. S. T. Prof. Delft, Julianahian 134, Central Lab. T.N.O. * ISINGS, J. Groningen, Oostersingel 69, Univ. of Groningen, Fac. of Med., Dept of Anat. and Embryol. * ARIfiNS KAPPERS, J. Prof., Dir. * BIJTEL, Miss J. H. Lect. MOLL, J. Prosector PROP, N. Chief Asst TAN, B. K. Asst Haren (Gron.), Rijksstraatweg 78, Zool. Lab. of the Univ. of Gronin- gen BAERENDS. G. P. Dir. BAERENDS— van ROON. Mrs J. M. (no embryol. work in progress) Leiden, 5e Binnenvestgracht 8, Genet. Inst, der Rijks Universiteit * GLOOR. H. J. Prof., Dir. SOBELS, Miss J. Chief Asst VOLKERS. W. S. Asst * TIMMERMANS. C. J. Leiden, Wassenaarseweg, Boerhaa- vekwartier, Univ. of Leyde, Fac. of Med., Anat. -Embryol. Lab. * DANKMEIJER, J. Prof.. Dir. LANDSMEER. J. M. F. Prosector * DEKKER, Miss A. Prosector * LOS, J. A. Asst * BROUWER, P. J. Asst * INGEN, Miss H. C. van Asst * GOEDBLOED, J. F. Asst * SNELLEN, H. A. Prof, of Cardiol. Leiden, Rijnsburgerweg 10, Boer- haavekwartier, Univ. of Leyde, Fac. of Med., Lab. for Cytol. and Exper. Histol. * GAILLARD, P. J. Prof., Dir. * ZAAIJER. Miss J. J. P. Conser- vator * SCHABERG, A. Conservator * SANIR, Miss E. K. * ALKEMADE. Miss E. C. M. Netherlands Utrecht, Bekkerstraat 141, Univ. of Utrecht, Veter. Anat. and Embryol. Inst. MEIJLING, H. A. Prof., Dir. SCHOTSMAN, G. WATERING, C. C. van de * HOESSELS, Miss E. L. M. J. Utrecht, Alex. Numankade 93, Univ. of Utrecht, Lab. for Veter. Physiol. * ROMIJN. C. Prof. Utrecht, Janskerkhof 2, Hubrecht Lab., Internat. Embryol. Inst. * NIEUWKOOP, P. D. Dir. * FABER, J. Asst * BOTERENBROOD, Miss E. C. Asst LEUSSINK, J. A. Asst Guest-workers, students: * OVER, H. J. * BODDINGIUS, Miss J. * JANSEN. J. G. O. * SCHREURS, A. F. * DRAISMA, J. R. Guest-workers, 1958: ANDREW, Miss A. (Joh'burg) GEORGE, J. C. (Baroda) JURA, C. (Krakow) MORRILL, J. B. (Tallahassee) NAKAMURA. I. (Tokyo) SUMINSKY.E. (Warszawa) SZfiKELY, G. (Pecs) SEO, S. (Fukuoka) HARA, K. (Nagoya) UtrecKt, Janskerkhof 3, State Univ. of Utrecht, Fac. of Sci., Zool. Lab. * RAVEN. Chr. P. Prof., Dir. * KAMER, J. C. v. d. Lect. * GEILENKIRCHEN, W. L. M. Asst * NIJENHUIS, E. D. Asst * VERDONK. N. H. Asst Utrecht, Janskerkhof 3, Centrum voor Electronenmicroscopie * BRETSCHNEIDER, L. H. Prof. * ELBERS, P. F. * RECOURT, A. UBBELS, Miss G. A. Utrecht, Janskerkhof 3, State Univ. of Utrecht, Med, Fac, Anat.-Em- bryol. Lab. MIJSBERG, W. A. Prof.. Dir. 146 Netherlands * DETH. J. H. M. G. van Prof., Chief Asst HUIZINGA, J. Chief Asst EDGAR. G. W. T. Chief Asst * LIMBORGH. J. van Asst GROOT, J. de Asst Utrecht, Stationsstraat 9, State Univ. of Utrecht, Genet. Inst. RQMKE, C. L. Prof., Dir. SOBELS, F. H. Conservator NORWAY Oslo, Univ. of Oslo, Anat. Inst. JANSEN, J. Dir. * HARKMARK. W. Prosector Oslo, Blindern, Univ. of Oslo, Dept of Zool. RUUD. Miss G. N. WALES (Vid. UNITED KINGDOM) POLAND Krakow, sw. Anny 6, Zaklad Anat. Porownawczej U.J. im H. Hoyera GRODZInSKI, Z. Prof., Head of Inst. BYCZKOWSKA— SMYK, Mrs W. Krakow, St Anne 6, Jagiellonian Univ., Fac. of Sci., Zool. Dept SMRECZYnSKI. S. Head of Dept * W5GLARSKA, Miss B. Asst * KRZYSZTOFOWICZ. Miss A. Asst * JURA, Cz. Asst Krakow, ul. Kopernika 7, Acad, of Med., Biol, and Embryol. Inst. * JURAND, A. Doc. RZEHAK, K. Inst, of Exper. Zool. ROGUSKI, H. Lodz, Narutowicza 60, Acad, of Med., Inst, of Histol. & Embryol. * BAGInSKI, S. Prof., Dir. BORSUK, Mrs I. Lect. RUDEWICZ, Mrs Cz. Asst FORTAK, W. Asst * REMBIELInSKI, B. Asst Portugal * KUnSKI. H. Asst JEDNEJEWSKA, Mrs H. Lect. SIWInSKA, Mrs D. Asst Warszawa, ul. Chalubinskiego 5, Acad, of Med., Inst, of Histol. and Embryol. ZWEIBAUM, J. Prof., Dir. KRASSOWSKI, T. Asst Warszawa, Krakowskie Przedmies- cie 26/28, Warsaw Univ., Dept of Cytol. * GEYER— DUSZYnSKA. Mrs I. Warszawa, ul. Grochowska 272, Veter. Fac, Inst, of Histol. and Embryol. * KONOPACKA. Mrs B. Prof. KRAINSKA, Mrs M. K. * bielanska— OSUCHOWSKA, Mrs Z. Wroclaw, ul. Chalubinskiego 6a, Akad. Medyczna, Zakiad Histol. i. Embryol. * SEMBRATOWA. Mrs. Z. Prof., Dir. Wroclaw, ul. Sienkicwica 21, Inst. Zool. Uniw. B.B. we Wroclawiu, Zaklad Anat, Porownawczej * SZARSKI, K. W. Dir. * ORSKA. Miss J. Adj. (Asst Lect.) * WINOWSKA, Mrs J. Sr Asst * ROMANKOWOWA. Mrs A. Asst Zaklad Zool. Ogolnej * SEMBRAT, K. Prof., Dir. * RADECKA, Mrs E. ERDMAN Adj. * PASCHMA, M. Adj. * KIELB6WNA, Miss L. Asst * NOWAK6WNA, Miss J. Asst * KOSCIELSKI, B. Asst * BRODOWA. Mrs Ch. GRABIE Asp. Wroclaw, ul. Bujwida 9, Akad. Med., Zaklad Biol. Ogolnej * STUCHLY, Z. Prof. PORTUGAL Coimbra, Fac. de Med., Inst, de Histol. e Embryol. 147 Portugal TAVARES DE SOUSA. A. Prof. (no embryol. work in progress) Lisboa, Avenida 28 de Maio. Fac. de Med., Inst, de Histol. e Embriol. t CELESTINO DA COSTA, A. Prof. * XAVIER MORATO, M. J. Prof.. Dir. * GOMES FERREIRA, J. V. * TEIXEIRA, Mrs I. Lisboa, Univ. de Lisboa. Museu e Lab. Zool. d. Fac. d. Ciencias * FONSECA SACARRAO, G. da RUMANIA Timisoara, Bdul Mihai Viteazul 24. Acad. Republ. Populare Romine, Baza de cercetari stiintifice Timi- soara * MENKES, B. Prof. SCOTLAND (Vid. UNITED KINGDOM) SPAIN Barcelona, Or Amigant 14, Inst. Biol, de Sarria PUJIULA, J. S.I. Madrid, Ciudad Universitaria, Fac. de Med., Lab. de Anat. y Embriol. ORTS LLORCA. F. Prof., Dir. SWEDEN Gotcborg C, 4: de Langgatan 7, Univ. of Gothenburg, Fac. of Med. * LPVTRUP, S. Dept of Histol. HYD£N, H. Goteborg C, Postgatan 35, Univ. of Gothenburg, Zool. Inst. * BERGQUIST, H. Lund, Biskopsgatan 7, Tornblad Inst, of comp. Embryol. GLIMSTEDT. G. Prof.. Dir. * KALLEN. B. Docent HAKANSSON, R. Amanuensis * KRABBE, K. H. Lund, Univ. of Lund, Dept of Anat. * BENGMARK, S. Asst Zool. Inst., Embryol. Dept 148 Sweden t GISLfiN. T. R. E. Prof. AKESSON, B. * ENEMAR, E. A. W. * MEURLING. P. B. Zoophysiol. Inst. AGRELL, I. P. S. EMANUELSSON, H. PERSSON, H. LINDH, N. O. Stockholm, Radmansgatan 70 A, Univ. of Stockholm, Zootom. Inst. SIL£N, L. K. P. Prof., Dir. * PEHRSON, G. T. Prof. * JOHNELS, A. G. Prosector * OLSSON, R. Asst * HAGELIN, L. O. Asst Guest-workers: * BERTMAR. G. * HYLBOM. J. R. Stockholm Va., 16- Norrtullsgatan, Fac. of Sci. and Mathem., Wenner- Grens Inst, for exper. Biol. * RUNNSTROM, J. A. M. Prof. (Emer.) * LINDBERG, N. O. H. Prof. * GUSTAFSON, T. Assoc. Prof. * HULTIN. J. M. T. Asst Prof. * IMMERS, J. Asst * BACKSTROM, S. Asst * PERLMANN, H. P. Asst * HAGSTROM, B. Asst Prof. Stockholm 50, Statens veter. med. anstalt, Dept of Parasitol. * MONNE, L. Assoc. Prof. Stockholm 60, Solnavagen 1 , Karo- linska Inst., Dept of Histol. HAGGQVIST, G. Prof., Dir. * NORBERG, O. V. Prof. * GYLLENSTEN. L. J. W. FRIBERG. U. WERSALL, J. Uppsala, Univ. of Uppsala, Anat. Inst. REXED, B. Prof. (no embryol. work in progress) Zool. Inst. * HORSTADIUS, S. Prof., Dir. * JAGERSTEN, K. G. M. Prof. * HOLM. K. A. Docent (Curator of the Museum) * NYHOLM. K. G. Docent Sweden * FRANZeN, A. S. Decent * JACOBSON, D. C.-O. * GIDHOLM. L. Inst, for Zoophysiol. * LINDAHL, P. E. Prof.. Dir. * KIHLSTROM, J.-E. * SUNDELL, Mrs G. * SUNDELL. L.-E. * ROSS, S. " BODIN, N.-O. SWITSERLAND Basel, Pestalozzistr. 20, Anat Inst. LUDWIG, K. S. Priv. Doc. SCHENK, R. Basel, Rheinsprung 9, Zool. Anstalt der Univ. * PORTMANN, A. Prof. Dir. * NOESCH. H. Prof. * GEIGY-HEESE. R. Prof. Basel, Socinstr. 57, Tropeninst. * GEIGY-HEESE, R. Prof., Dir. Bern, Sahlistr. 8, Univ. Bern, Philo- soph. Fak., Zool. Inst. * BALTZER. F. Prof. (Emer.) * LEHMANN. F. E. Prof., Dir. * ROSIN. S. Prof. (Abt. f. Genetik) * LUSCHER. M. Prof. (Abt. f. Zoophysiol.) * WEBER, R. Asst * NEF. W. * ENGELMANN, F. * BENZ, G. A. Asst Bern, Buhlstr. 26, Univ. Bern, Med. Fak., Anat. Inst. * HINTZSCHE. E. Prof.. Dir. BLUNTSCHLI. H. Prof. (Emer.), Kust. * STRAUSS, F. a.o. Prof., Pros. FEREMUTSCH, K. Priv. Doz. Bern, Museum d'Histoire Naturelle * RUBER. W. Bern, Waldau, Med. Fak.. Hirnanat. Inst, der psychiatr. Univ.-klinik GRONTHAL. E. Prof., Dir. FEREMUTSCH, K. Priv. Doz. Freiburg, Zool.-vergl. Anat. Inst, der Univ. * KALIN, J. Prof. Geneve, 20 Rue Ecole de Med.. United Kingdom (England) Univ. de Geneve, Inst. d'Anat. * BAUMANN. J. A. Prof.. Dir. * WEBER, A. Dir. du Lab. de Neurohistol. * BAUD, C. A. Chef de Trav. * GALLERA. J. ler Asst * SIEGFRIED, J. Geneve, Ecole de Med., Inst. d'Histol. et d'Embryol. BUJARD, E. Prof. Geneve, Univ. de Geneve, Inst, de Zool. et d'Anat. comp. GUYENOT. E. Dir. * KIORTSIS. V. Priv. Doz. PONSE. Miss K. DROIN, Miss A. MERMOD. Miss C. L. RAHMANI. Miss T. Ziirich, Universitatsstr. 2. Zool. Inst, der Eidg. Techn. Hochschule * ULRICH, H. Prof.. Dir. * BRUNOLD, Miss E. Zurich 6, Kiinstlergasse 16. Univ. Ziirich. Naturw. Fak., Zool.-vergl. Anat. Inst. HADORN. E. Prof.. Dir. STEINER, H. Prof. ANDERS. G. CHEN. P. S. KOCHER, W. LOOSLI, R. ZELLER. Ch. BENZ. G. SCHNITTER, M. WALKMEISTER, A. Zurich 7. Gloriastr. 19. Univ.. Zurich, Med. Fak.. Anat. Inst. TONDURY. G. Prof.. Dir. THEILER, K. Asst UNITED KINGDOM (U.K.) En g Ian d Birmingham 15. Edgbaston, Bir- mingham Univ.. Dept of Zool. and Comp, Physiol. PEPPER, Miss F. J. (no embryol. work in progress) The Med. School, Dept of Anat. ZUCKERMAN, S. Prof., Dir. GREEN, S. H. Lect. MANDL. Miss A. M. Asst 149 U.K. (England) BRANDT. W. * EAYRS, J. T. THOMPSON. A. P. D. Bristol 8, Univ. of Bristol. Dept of Zool. * HARRIS. J. E. Prof. ' WHITING. H. P. Cambridge, Downing St, Univ. of Cambridge. Med. School. Anat. Dept BOYD, J. D. Prof., Dir. HUGHES— GLASTONE, Mrs. S. HUGHES, A. F. W. SHUTE, C. C. D. LEVER. J. D. TSCHUMI, P. A. * FORD, E. H. R. Dept of Biochemistry * WILLIAMS, J. Univ. Museum of Zool, * GRAY, Sir J. Prof., Head * ROTHSCHILD, Lord SMITH, S. GOODHART, C. B. Cambridge, Gonville and Caius Coll. NEEDHAM, J. Cambridge, Strangeways Res. Lab. FELL, Miss H. B. Harwell, Berkshire, Atomic Energy Res. Establishment, Radiobiol. Res. Unit * CARTER, T. C. GODFREY, J. * LYON, Miss M. F. MacKENDRICK, Miss M. E. PHILLIPS, Miss R. J. S. Liverpool, Univ. of Liverpool, Dept of Anat. * HARRISON, R. G. Prof. * MACMILLAN, E. W. * CLEGG. E. J. * HARRISON, G. A. * FOLEY, Mrs E. P. London, Mill Hill, Nat. Inst, for Med. Research t MELLANBY. Sir E. * AUSTIN. C. R. * BISHOP. M. W. H. London, E. 1. Turner St, Univ. of London, London Hosp. Med. Coll., 150 U.K. (England) Anat. Dept. HARRISON. R. J. Head of Dept TOMLINSON. J. D. W. Lect. TURNER. C. J. Lect. STEEL, F. L. D. London, E. C. 1, Charterhouse Square, St Bartholomew's Hosp. Med. Coll., Dept of Zool. and Comp. Anat. * BELLAIRS— MORGAN. Mrs M. R. London, N.W. 1, Royal College St, Roy. Veter. Coll. * McLaren, Mrs A. * MICHIE, D. London, N.W. 1, Regent's Park, Bedford Coll., Dept of Zool. * INGE, Miss F. E. London, S.E. 1, St Thomas' Hosp. Med. School, Dept of Anat. DAVIES, D.V. Prof. (no embryol. work in progress) London, S.E. 1, Guy's Hosp., Med. School, Dept of Biol. * BAXTER, E. W, London S.W. 1. Udall St. Vincent Square, Westminster Med. School. Research Labs * O'CONNOR. R. J. London, W. 1. Middlesex Hosp., Med. School * HARRIS. F. T. C. Dept of Anat. SILVER. P. H. S. GOULD. R. P. London, W. 2. Norfolk Place. Pad- dington, St Mary's Hosp. Med. School. Biol. Dept FOSTER. C. L. Head of Dept FISK, A. ALLANSON— BAXTER. Mrs M. London, W.C. 1, Keppelstreet (Go- werstreet), London School of Hy- giene and Tropical Med., Dept of Parasitol. * DASGUPTA. B. London, W.C. 1 , Gower St, Univ. Coll. of London * FLYNN, T. THOMSON Prof. (Emer.) U.K. (England) Dept of Embryol. * ABERCROMBIE. M. Reader * DEUCHAR, Miss E. M. Lect. * KARTHAUSER. Miss H. M. * CURTIS. A. S. G. Dept of Genet. * GRONEBERG, H. Prof. * TRUSLOVE. Miss G. M. Dept of Zool. and Comp. Anat. * MEDAWAR, P. B. Jodrell Prof., Dir. * NEWTH. D. R. Lect. * FOX. H. Res. Asst BRENT. L. Lect. London, W.C. 2, 62-65 Chandos Place, Univ. of London, Charing Cross Hosp.. Med. School, Dept of Anat. * HAMILTON, W. J. Prof. Dir. * GLENISTER, T. W. Lect. * BACKHOUSE. K. M. Lect. * ROSS, Miss J. R. W. Dept of Physiol. * FRAZER, J. F. D. London, W.C. 2, Strand, King's College * MANTON. S. M. Manchester, The University, Dept of Anat. * ASHLEY, G. T. Manchester 20, Withington, Christie Hosp. & Holt Radium Inst., Tissue Culture Lab. THOMASON, Miss D. Newcastle upon Tyne, Univ. of Dur- ham, King's Coll., Med. School, Dept of Anat. CAUNA, N. Oxford, The Univ. Museum, Dept of Zool. and Comp. Anat. * NEEDHAM A. E. FISCHBERG, M. Wilfred Jen- kinson Mem. Lect. * ELSDALE, T. Dept of Human Anat. DICK, D. A. T. Sheffield, Univ. of Sheffield. Fac of Med.. Dept of Anat. DAVrnS. F. Prof. U.K. (Scotland) * MARTIN, B. F. Sr Lect. * KING. T. S. Lect. * JOHNSON. F. R. Lect. * McMINN. R. M. H. Lect. Dept of Zool. EASTHAM. L. E. S. Prof. * FRANCIS. E. T. B. Reader in Vert. Zool. * HIGHNAM. K. C. Asst Lect. in Zool. N. Ireland Belfast, Queens Univ.. Dept of Zool. * BLACKLER. A. W. N.Wales Bangor, Caernarvonshire. Univ. Coll. of N. Wales. Dept of Zool. * KELLY. W. A. Demonstr. * THOMPSON, T. E. A. R. C. Unit of Embryol. * BRAMBELL, F. W. R. Prof., Dir. * HEMMINGS, W. A. Res. * HALLIDAY, R. Res. * MORRIS, I. G. Res. Menai Bridge, Anglesey, Univ. Coll. of N. Wales, Marine Biol. Station * CRISP, D. J. Dir. * JONES, W. E. * BURDON-JONES. C. Swansea, Glamorganshire, Single- ton Park, Univ. Coll. of Swansea. Dept of Zool. * KNIGHT-JONES, E. W. Prof. * NAYLOR, E. * MacFADYEN, A. Scotland Edinburgh 8, Tevist Row, Univ. New Buildings, Univ. of Edinburgh, Dept of Anat. * MUIR, A. R. Edinburgh 9, West Mains Road, King's Buildings, Inst, of Anim. Genet. & Univ. Dept of Genet. * WADDINGTON, C. H. Prof.. Dir. * BEATTY, R. A. Pri. Sc. Off. (A.R.C. Staff) 151 U.K. (Scotland) * CLAYTON— FREEDMAN. Mrs R. M. Lect. * SELMAN. G. G. Asst Lect. * EDWARDS. R. G. * LUCEY, E. C. A. (Cinemato- graphy) * PANTELOURIS. E. M. * SIRLIN. J. L. * BILLETT, F. * PERRY. Miss M. M. * OKADA. E. * OKADA. T. S. (from Tokyo) * BRAHMA. S. K. * FROHLICH, A. Univ. Biophysics Unit DAINTY, J. (no embryol. work in progress) Edinburgh 9, West Mains Road, Univ. of Edingburgh Dept of Zool. * SWANN, M. M. Prof.. Dir. * EDE. D. A. Asst * HALE. L. J. Lect. * JONES. B. M. Lect. KILLE. R. A. Lect. MITCHISON. J. M. TUFT. P. H. Lect. Lect. • MITCHISON. N. A. Glasgow, W. 2, The University, Dept of Genet. CLEAT, N. D. St Andrews, Fife, The Univ., Gatty Marine Lab. DODD, J. M. Dept of Zool. * CALLAN, H. G. Prof. U.S.S.R. Leningrad. 164, Universitetskaja Yougoslavia Nabereznaja nr. 1. Zool. Inst, of the Acad, of Sci. of the U.S.S.R. STEINBERG. D. M. Prof.. Adj. Dir. Moscow, V-71, 33 Bolshaja Kalushs- kaja, Inst, of Animal Morphol. of the Acad, of Sci. of the U.S.S.R. CHROESJTSJOV. G. K. Prof.. Dir. * DRAGOMIROV, N. I. Prof. * POLEZHAYEV, L. V. Prof. D.P. Filatov Lab. of Exp. Embryol. * ASTAUROV, B. L. Prof.. Head Senior Research Workers: * DETTLAFF. Mrs T. A. Prof. * LOPASHOV, G. V. Prof. * GINSBURG. Mrs A. S. Research Workers: * BEDNJAKOVA, Mrs T. A. * STROEVA, Miss O. G. * IGNATJEVA, Mrs G. M. * VEREJSKAJA, Miss V. N. * ZOTIN, A. I. Lab. of Ecol. Embryol. KRIZANOVSKY. S G. Prof.. Head Lab. of Comp. Embryol. SMIDT. G. A. Prof., Head Lab. of Gener. Embryol. MATVEJEV, B. S. Prof., Head YOUGOSLAVIA Sarajevo, Fac. de Med., Inst. d'His- tol. et d'Embryol. MILIN, R. Prof., Head Zagreb, Salata, Fac. de Med., Inst, de Biol. * SKREB, N. Docent * LEVAK, B. Asst 152 LIST OF SUBJECTS with Names of Investigators (arranged according to organ syitems »nd taxonomic groups) GENERAL DIVISION CLASSIFICATION INTO GENERAL RUBRICS I Descriptive and comparative embryology II Experimental developmental morphology III Physiology of development IV Development and genetics V Development and pathology VI Regeneration VII Metamorphosis CLASSIFICATION OF TAXONOMIC GROUPS AND SPECIAL ORGAN-SYSTEMS (to be used [or alt rubrics) Taxonomic subdivision PL Plants EV Evertebrata P Protista A Porifera B Coelenterata C Vermes and Onychophora. Tardigrada and Linguatulida D Arthropoda E Mollusca F Bryozoa, Entoprocta, Brachiopoda and Hemichordata G Echinodermata H Urochordata and Cephalochordata V Vertebrata LV Lower Vertebrates I Pisces J Amphibia HV Higher Vertebrates K Reptilia L Aves M Mammalia Subdivision of special organ systems 1 Skin a general subjects b exo-skeleton c teeth d hair, horns, nails e feathers f sense organs g glands h mammae i pigment cells and patterns 153 Il crvous system I general subjects I r-t>nfrnl n«>r\'r>tlS SVStem I Nervous system a b central nervous system 1 brain 2 spinal cord c accessory organs 1 paraphysis 2 parietal organ 3 pineal body 4 hypophysis d ganglia 1 cephalic ganglia 2 spinal ganglia e nerves 1 cephalic nerves 2 spinal nerves f para- and sympathetic and intramural nervous system 1 para- and sympathetic nervous system 2 intramural nervous system g meninges Special sense organs a nasal organ b eye 1 eye 2 lens c ear d lateral sense organs Skeleton a general subjects b embryonic temporary endo-skeleton c skull and visceral skeleton d truncal skeleton e skeleton of extremities f joints Muscular system a general subjects b skeletal muscles (head, trunk and tail) c visceral muscles (head and trunk) d muscles of extremities Alimentary tract a general subjects b mouth- and pharyngeal cavities c intestinal tract d proctodaeum e salivary glands f liver g pancreas Respiratory organs a general subjects b external gills 154 c internal gills d lungs and larynx c air-bladder 8 Heart, \'ascular system and blood a general subjects b heart c;d arterial and venous system e capiilarv system f blood 9 Coelomic cavities and endothelia, lympathic system and connective tissue ab coelomic cavities and endothelia c lympathic tissue d connective tissue 10 Urogenital system and sexual differentiation a general subjects be kidneys; nephric ducts and bladder d,'e,f gonads (ovary and testis), genital tracts and accessory glands g sexual differentiation 11 Endocrine glands a general subjects b hypophysis c thymus d thyroid gland e parathyroid glands f gonads g adrenals h pancreas I. DESCRIPTIVE AND COMPAR.-KTIVE EMBRYOLOGY SUBDIMSION 1 Theoretical problems and general questions 2 Methods and techniques 3 General subjects (asexual development, reproduction, etc.) 4 Initial development a General subjects b Primordial germ cells c Gameto-. ovo- and spermatogenesis d Maturation e Ovulation and oviposition f Activation and fertilization g Parthenogenesis 5 Clear age and mitosis a Cleavage b Mitosis 6 Further development o[ Invertebrates (including complete and partial — e.g. earlv — development) PL Plants EV Evertebrata P Protista 155 I. 1 I. 4b A Porifera B Coelcntcrata C Vermes and Onychophora, Tardigrada and Linguatulida D Arthropoda E Mollusca F Bryoroa, Entoprocta. Brachiopoda and Hemichordata G Echinoderniata H Urochordata and Cephalochordata 7 Further development of Vertebrates (including complete and partial — e.g. early — development) a General investigations 1 General subjects 2 Complete develcpmcr.t 3 Partial development 4 Implantation and placentation b Early development, gastrulation, etc. 1 Early development 2 Gastrulation and formation of germ layers 3 Development of foetal membranes c Neurulation. etc. 1 Neurulation (s.s.) 2 Development of neural crest 3 First larval development d Development of part of the organism 1 Head 2 Extremities 3 Tail e Development of special organ-systems (Cf. general subdivision p. 153 — 155) f Histo- and cytogenesis 8 Growth and differentiation (Invertebrates and Vertebrates) a Growth a/b Growth and differentiation b Differentiation 1 Theoretical problems and Recourt, A. — a E general questions Harvey, Mrs E. Browne — c Gilbert P W a G I 2 Methods and techniques Arslan, M. — a M Clark, H. — c Sauser, G. — c 3 General subjects L M 4 Initial development a General subjects Shulov, A. — c D (asexual development, reprod uc- Harvey, Mrs E. Browne — f G tion, etc.) Pasteels, J. — d G Hale. L. J. — a B Dollander, A. — c J Nobih. R.— a C Dollander, A. — c M Papi, F. — a C b Primordieil germ cells Johnson. G. — a D Reggiani, Miss M. P. — a C Legrand, J. J. — d D Laven, H. — a D 156 I. 4b Follenius, E. and J. H. Vivien — a I Blackler, A. W. — a J Sembrat. K. — b J Gomes Ferreira, J. V. — a M c Gameto-, ovo- and spermato^ genesis Callan, H. G. — a Kemp, N. E. — c Franzen, A. S. — a EV Benazzi-Lentati, Mrs G. — a C Ghirardelli, E. — b C Mirolli, M. — a C Reggiani, Miss M. P. — a C Bielanska-Osuchowska, Mrs Z. — b D Chishima, K. — a D Geigy-Heese, R. — b D Greca, M. La — a D Kawamura, K. — a D Kiihn, A. — e D Larambergue, M. de — b E Raven, Chr. P. — d E Recourt, A. — a E Kanoh, Y. — a I Yamamoto, K. — a I Dollander, A. — d J Frazer, J. F. D. — a J Austin, C. R. — a M Bishop, M.W.H. — a M Butler, H. — a M Roosen-Runge, E. C. — a M d Maturation Raven, Chr. P. — e E Moricard, R. — a M e Ovulation and oviposition Alden. R. H. — a M Moricard, R. — a M Strauss, F. — a M i Activation and fertilization Benazzi-Lentati, Mrs G. — a C Colwin, A. L. and Colwin, Mrs L. H. — a C Colwin, A. L. and Colwin, Mrs L. H. — a G Endo, Y. — a G Colwin, A. L. and Colwin, Mrs L. H. — a H Ginsburg, Mrs A. S. — a I I. 6C Kanoh. Y. — a I Austin, C. R. — a M Bishop, M. W. H. — a M Moricard, R. — a, c M g Parthenogenesis Laven, H. — ^ b D 5 Cleavage and mitosis a Cleavage Harris, F, T. C. — a Jones, VV. E. — a PI Swann, M. M. — b P Weisz, P. B. — b P Nijenhuis, E. D. — c E Fujii, T.— a G Harvey, Mrs E. Browne — e G Salfi, M. — a H Weisz, P. B. — b J Weisz, P. B. — b M Corliss, C. E. — a M Fujii, T. — a M b Mitosis 6 Further development o[ Invertebrates (including complete and partial — e.g. early — development) PI Plants Jones, W. E. — a EV Evertebrata Mancuso, V. — b P Protista Weisz, P. B. — a Faure-Fremiet, E. and Hamard, Miss M. — a A Porifera B Coelcntcrata Deroux, G. — b Hale, L. J.— a Lallier, R. A. — e Sembrat, K. — a C Vermes and Onychophora, Tardigrada and Linguatulida Bookhout, C. G. — a Gidholm, L. — a Hylbom, J. R. — a Jagersten, K. G. M. — a Manton, S. M. — a Monne, L. — a 157 I. 6C Nyholm. K. G. — a. b Paschma, M. — a Ranzoli. F. — b, c W?glarska, Miss B. — a D Arthropoda Bergquist, H. — b Bookhout. C. G. — b Caspari, E. W. — b Chishima, K. — a Colombo. G. — b Costlow, J. D. — a Geigy-Heese, R. — b Hoist Christensen, P. J. — a, b Ichikawa, A. — a Isings, J. — a Ito. T. — b Jura, Cz. — c Krause, G. — c Laven. H. — b Legrand, J. J. — b. d Luscher. M. — b Manton, S. M. — b Martin, Miss B, A. — a Nakane, T. — a Niiesch. H. — c Perry, Miss M. M., Waddington, C. H. and Selman, G. G. — b Pflugfelder, O. — d Portmann, A. — a Poulson, D. F. — a Rappaport, Jr. R. — b Sander, K. — a Schwartz, V. — a Seidel, F. — b Shiino, S. M. — a Stout, Miss V. M. — a, b Voy, A. — b Yoshikura, M. — a E Mollusca Battle, Miss H. I. — e Burdon-Jones, C. — a Fonseca Sacarrao, G. da — a Ince, Miss F, E. — a Larambergue, M. de — a Recourt, A. — a Thompson. T. E. — a, b Verdonk, N. H. — a F Bryozoa, Entoprocta, Brachio- podo and Hemichordata 158 I. 7a Burdon-Jones. C. — a Percival. E. — a G Echinodermata Baltus, Miss E. — a Moore, A. R. — a H Urochordata and Cephalochor- data Brewin, B. I. — a Olsson. R. — b Sabbadin, A. — c Salfi, M. — a 7 Further development of Vertebrates (including complete and partial — e.g. early — development) a General investigations General subjects Ashley, G. T. — a • V Sauser, G. — d V Battle, Miss H. I. — a Gilbert, P. W. — b Chishima, K. — b Karasaki, S. — b Moore, J. A. — b Okano, H. — b Perry, Miss M. M., Waddington, C. H. and Selman, G. G. — b J Spratt Jr, N. T. — e L Austin, C. R. — a M Bishop, M. W. H. — a M Corner, G. W. — a M Hoessels, Miss E. L. M. J. — b M Latimer, H. B. — a M Nicholas, J. S. — a M Seidel, F. — a M Complete development D'Ancona. U. — b V Baxter, E. W. — a Cambar, R. — f Damas, H. F, C. — a Davies, D. H. — a Gilbert. P. W.— b Jager, B. de — a Stockard, A. H. — a Cambar, R. — e Samano Bishop, Miss A. — b Sirakami, K. I. — b I. 7a I. Iz. 1 Stockard, A. H. — a J Campenhout, E. van — c K Pasteels, J. — a K Arslan, M. — a M Beatty, R. A. and Lucey, E. C. A. — d M Pastial development Sedra. S. N. — a J Kamel, A. — a J Kamel. A. — a K Hoessels, Miss E. L. M. J. — a L Lutz, H. — a L Over. H. J. — a L Butler, H. — a M Implantation and placentation Alden. R. H. — a M Backhouse, K. M. — b, c M Bartelmez, G. W. — a M Boving, B. G. — a, b M Boyd, J. D. and Hamilton, W. J. — a M Gitlin, G. — c M Glenister, T. W. — b M Greulich, R. C. — a M Hamilton, W. J. and Harrison, R. J. — b M Orsini, Mrs M. C. Ward — a M Ramsey, Miss E. M. — a M Strauss, F. — b M Wimsatt, W. A. — a M b Early development, gastrulation, etc. Colombo. G. — a Islam. A. — b Nieuwkoop, P. D. — c : Lutz, H. — d L Backhouse, K. M. — b M Boving, B. G. — a, c M Glenister, T. W. — c M Pincus, G. — b M Early development Gastrulation and formation o[ germ layers Malan. Miss M. E. — a K Development of foetal membranes Bautzmann. H. — b HV Alden. R. H. — a M Mossman, H. W. — a M Orsini, Mrs M. C. Ward — a M Schroder, R. K. P. — a M c Neurulation, etc. Nieuwkoop, P. D. — c J Spratt Jr. N. T. — d L Neurulation (s.s.) Development of neural crest Raunich, L. — d J Rossini, Miss M. C. — b J Flynn, T. Thomson — a M First larval development Muchmore, W. B. — a J Blechschmidt. E. — a M d Development of part of the organism Head Fox. H. — d J Huber. W. — a M Extremities Cauna, N. — b V Francois. Y. — a I Slaby, O. — b HV Camosso, Miss M. E. — ^a L Saunders. J. W. — f , h L Cauna, N. — b M Olivier, G. H. G. and Pineau, H. — c M Saunders, J. W. — f M Tail e Development of special organ- systems Skin General subjects Lyne, A. G. — a M Exo'skeleton Teeth Leblond. C. P. — b V Friant, Mrs M. — b M Kindahl, Miss M. — a M Parrant, M. — a M Hair, horns, nails Friant, Mrs M. — e V Isings, J. — b M Lyne. A. G. — a. b M Schinckel, P. G. — a M 159 I. 7c. 1 Fcalhcrs Friant. Mrs M. — d Sense organs Cauna. N. — a Glands Cohn. S. A. — a Lutz. H. — g Cohn. S. A. — a. b Lyne. A. G. — b Raynaud, A. — a Pigment cells and patterns Portmann, A. — c Reams, Jr. W. M. — a Saunders, J. W. — a Saunders, J. W. — a Nervous system General subjects Baffoni, G. M. — a Weber. A. — a Harris, J. E. and Whiting, H. P. — a Dreyer, Miss M. V. — a Hamburger, V. — a Central nervous system Horstmann, E. — a Olsson, R. — b Deroux, G. — a Kollros, J. J. — e Bellairs-Morgan, Mrs M. R. — a Brown, J. W. — a Brain Olsson, R. — a, c Harkmark. W. — b Krabbe, K. H. — a Portmann. A. — b Teixeira, Mrs I. — a Ariens Kappers, J. — a Bijtel, Miss J. H. — f Brondsted, H. V. — c Delmas, A. — a Fleischhauer, K. — a Friant, Mrs M. — c Grignon, G. — b Preto Parvis, Mrs V. — Sinclair, J. G. — a Windle, W. F. — b Xavier Morato, M. }. — 160 I. 7e. 3 M L L M M M K L L M L M I L L L L M M M M M M M M M M M Spinal cord Accessory organs Paraphysis Parietal organ Pineal body Kamer, J, C. van de — a Oksche, A. A. — b Venzke, W. G. — a Hypophysis (see also under endocrine glands) Grignon, G. — a Bartelmez, G. W. — c Ganglia Cephalic ganglia Rebert, R. R. — a Samano Bishop, Miss A. — a Spinal ganglia Nerves Campenhout, E. vari — a, b Cephalic nerves Campenhout, E. van — e Campenhout, E. van — e Eyries, Ch. — a Spinal nerves Fenart, R. and Olivier, G. H. G. — a Para' and sympathetic and intramural nervous system Siegfried, J. — a Johnels, A. G. — a Para- and sympathetic nervous system Hammond, W. S. and Yntema, C. L. — a Jit. I. — c Olivier, G. H. G. and J. L. Tarnus — b Intramural nervous system Campenhout. E. van — d Meninges Special sense organs Nasal organ Bijtel. Miss J. H. — d Slaby. O. — c Bijtel, Miss J. H. — c Blechschmidt, E. — b Eye Meyer, D. B. and O'Rahilly, R. — a Bartelmez, G. W. — b L M K M M M LV L M M M J HV M M L M I. 7e. 3 1. 7e. 6 Sinclair, J. G. — d M Eye (s.s.) Steinitz. H. — c J Stone, L. S. — d J Lens Ear Bijtel. Miss J. H. — c J Bast. T. H. — a M Eyries, Ch. — a M Goedbloed, J. F. — a M Schlesinger, A. B. — c M Lateral sense organs Dragomirov, N. I. — a I Pehrson, G. T. — a I Skeleton General subjects Friant, Mrs M. — e V Leblond, C. P. — b V Kamel, A. — b I Orska, Miss J. — a I Okada, T. and Waddington, C. H. — a J Siirlin, J. L. and Waddington, C. H. — d I Friant, Mrs M. — a K Friant, Mrs M. — a L Crelin. E. S. — a M Felts, W. J. L. — a M Friant, Mrs M. — a M Jit, I. — d M Okada. T. and Waddington, C. H. — a M Robertson, G. G. — b M Embryonic temporary cndo-skcleton Srinivasachar, H. R. — a I Skull and visceral skeleton Bertmar, G. — a I Pehrson, G. T. — a, b I Srinivasachar, H. R. — b I Michael, M. I. and Sedra, S. N. — a, b, c J Westhuizen, C. M. v. d. — a J Slaby, O. — a HV Hammond, W. S. and Yntema, C. L. — b L Bast, T. H. — a M Dziallas, P. R. — a. b M Ford, E. H. R. — a M Kalin, J. — a M Norberg, O. V. — a M Truncal skeleton Francois, Y, — a I Moursi, A. A. and Sedra, S. N. — a J Skeleton of extremities Skinner, J. H. — a K Alkemade, Miss E. C. M. — a M Gardner, E.. Gray, D. J. and O'Rahilly, R. — a M Olivier, G. H. G. and Pineau, H, — c M Romankowowa, Mrs A. — a M Singer, R. — a M Joints Crelin, E. S. — a M Gardner, E.. Gray, D. J. and O'Rahilly, R. — a M Moffett, Jr, B. C. — a, b M Muscular system General subjects Wilde Jr, C. E. — c J Jaya, Miss Y. — a M Muir, A. R. — b M Zaaijer, Miss J. J. P. — b M Skeletal muscles (head, trunk and tail) Visceral muscles (head and trunk) Fox, H. — c J Muscles of extremities Alimentary tract General subjects Campenhout, E. van — b Delgado, R. — a M O'Connor, R. J. — a M Tucker, R. — b M Mouth' and pharyngeal cavities Boschwitz, Miss B. D. — a J Slipka, J. — a, b HV Dreyer, Miss M. V. — a L Kleiss, E. — a M Walker, B. E. — a M Zenker, W. — a M Intestinal tract Butler, H. — b M Ford. P. — a M Jit, I. — a, b, e M 161 I. 7e. 6 Konopacka. Mrs B. — b Koono, J. — a Priesching. A. — a Proctodaeum Dijk. D. E. van — a Salivary glands Tucker. R. — a Liver Pancreas Humphrey. Miss T. — b Respiratory organs General subjects External gills Internal gills Lungs and larynx Campenhout, E. van — a Dingler-Hahl, Mrs E. Ch. - Hoist Christensen, P. J. — c Quenu. L. — a Quereux, P. — a Air-bladder Winowska, Mrs J. — a Heart, vascular system and General subjects Stephan, Fr. — a Condorelli. M. — a Heart Dankmeijer, J. and Los, J. A. — a Baud. C. A. — a Baumann, J. A. and Gallera, J. — a Davies, F. and Francis, E. T. B. — a King, T. S. — a Latimer, H. B. — b Muir, A. R. — a Arterial and venous system Raunich, L. — a Adams. W. E. — a Adams, W. E. — a Dziallas. P. R. — a.b Ingen, Miss H. C. van — b Jaya. Miss Y. — a Reis. R. H. — c Reynolds. S. R. M. — d Slijper, E. J. — a Capillary system 162 M M M I HV M a,b M M M M blood L M M M M M I K M M M M M M M Blood Raunich, L. — a Chishima, K. — b Lemez, L. — a Venzke, W. G. - Jones, O. P. — a Muir, A. R. — b L 7e. 10 L L M M Coelomic cavities and endothelia, lymphatic system and connective tissue Coelomic cavities Quenu, L. — b M Quereux, P. — b M Wells, L. J. — a M Endothelia Lymphatic system Blechschmidt, E. and Ferber-Schmidt, L. von — c Gyllensten, L. J. W. — a Koono, J. — a Connective tissue Preto Parvis, Mrs V. — b Koono, J. — b Rengel, S., L. — a Urogenital system and sexual differentiation General subjects Smet. W. M. A. De — a Backhouse, K. M. — a Roosen-Runge, E. C — b Kidneys Szarski, K. W. — a Cambar, R. — a Fox, H. — e Szarski, K. W. — a Stenger — Haffen, Mrs K. E. — Boyer. C. C. — a Nephric ducts and bladder Gonads Witschi, E. — f Follenius, E. and Vivien, J. H. — a Mohsen, Th., Vivien, J. H. and Thiebold, J. J. — a Lepori, N. G. — a Reggiani. Miss M. P. — b Matejka, M. — a Sabbadin, A. — a M M M L M M I M M J J J a L M V I J J HV K I. 7e. 10 I. 8b Stefan, Miss Y. and Vivien, J. H. — a K Marin, G. — a L Backhouse, K, M. — a M Genital tracts Mohsen, Th., Vivien, J. H. and Thiebold, J. J. — a I Cambar, R. — d J Matejka, M. — a HV Stefan, Miss Y. and Vivien, ]. H.— a K Dankmeijer, J. — c M Gitlin, G. — a M Mossman, H. W. — a M Ross, Miss J. R. W. — a M Szarski. K. W. — b M Accessory glands Matejka, M. — a HV Bengmark, S. — a M Szarski, K. W. — b M Sexual differentiation Witschi, E. — c J Bellvomini, H., Hoge, A. and Schreiber, G. — a K Marin, G. — a L Reinbold, R. — a L Lindahl. P. E. and Sundell-Thorsell. Mrs G. — c M Vacek, Z. — a M Endocrine glands General subjects Rechenmann, R., Vivien, J. H. and Schott, J. — a I Dimond, Sister M. T. — a K Moog, Miss F. — b M Hypophysis (sec also under nervous system) Meurling, P. B. — a I Dimond, Sister M. T. — a K Grignon, G. — a L Enemar, E. A. W. — a M Thjmius Thyroid gland Leblond, C. P. — a V Parathjnroid glands Gonads Adrenals Witschi, E. — f Crowder, R. E. — a Schaberg, A. — a Pancreas Heckerman, R. O. — a Heckerman, R. O. — a f Histo-and cytogenesis Sauser, G. — b, d Friant. Mrs M. — e Schreiber, G. — a Over, H. ]. — a Preto Parvis, Mrs V. — b Schreiber, G. — a Schreiber, G. — a V M M L M V J L L L M 8 Growth and di[[erentiation (Invertebrates and Vertebrates) a Growth Mitchison, J. M. — a P Swann, M. M. — b P Legrand, J. J. — c, e D Tuft, P. H. — a D Voy, A. — a D Larambergue, M. de — c E Tuft, P. H. — a I Lehmann, F. E. — a J Tisna-Amidjaja, D. A. — a J Tuft. P. H. — a J Felts, W. J. L. — a M Ford, E. H. R. — a M Kahn, J. — a M Robertson, G. G. — b M a/b Growth and differentiation Baffoni, G. M. — a Fibers, P. F. — a E b Differentiation Chiquoine, A. D. — a Gloor, H. J. — a D Karasaki, S. and Yamada, T. — a J Lanzavecchia, G. — b J Leone, V. — b J Bellairs-Morgan, Mrs M. R. ^ — a L Cigada-Leonardi, Mrs M. — b L Clark, H. — c L Lanzavecchia, G. — b L Muir. A. R. — b M 163 11. EXPERIMENTAL DEVELOPMENTAL MORPHOLOGY SUBDIVISION 1 Theoretical problems and general questions 2 Methods and techniques 3 General subjects (asexual development, reproduction, etc.) -f Initial development a General subjects b Primordial germ cells c Gameto-, ovo- and spermatogenesis d Maturation e Ovulation and oviposition f Activation and fertilization g Parthenogenesis 5 Cleavage and mitosis a Cleavage b Mitosis 6 Further development o[ Invertebrates a General subjects (including complete development) b Topogenesis c Determination of ,,Primitiventwicklung" d Development of part of the organism e Development of special organ systems (Cf. general subdivision p. 153 — 155) f Histo- and cytogenesis 7 Further development o[ Vertebrates a General investigations 1 General subjects 2 Complete development 3 Partial development 4 Implantation and placentation b Topogenesis 1 Early development 2 Gastrulation and formation of germ layers 3 Neurulation 4 Formation of neural crest 5 First larval development c Induction, determination, etc. 1 Induction 2 Determination 3 Regulation and organisation d Development of part of the organism 1 Head 2 Extremities 3 Tail e Development of special organ-systems (Cf. general subdivision p. 153 — 155) f Histo- and cytogenesis 164 II. 5a 8 Growth and differentiation (Invertebrates and Vertebrates) a Growth a/b Growth and differentiation b Differentiation CHARACTER OF INVESTIGATION H) Physical treatment i5) Chemical treatment ^6) Influence of hormones and vitamins 1 Theoretical problems and general questions 2 Methods and techniques Curtis, A. S. G. — b J Curtis, A. S. G. — b L Hicks, S. P. — a (4)M 3 General subjects (asexual development, reproduc- tion, etc.) Gilbert, P. W. — a I Felts, W. J. L. — e M Gates, A. H. — a M 4 Initial development a General subjects Nijenhuis, E. D. — a (5)E Harvey, Mrs E. Browne — -a (4)G Harvey, Mrs E. Browne - -f G Ortolani, Miss G. — a H Beatty, R. A. — a M b Primordial germ cells Vannini, E. — d C Geyer-Duszyhska, Mrs I. — b D Follenius, E. and Vivien, J, H. — a I Aubry, Miss R. — a J Blackler, A. W. — a J Bounoure, L. — a J Rebert, R. R. — b J Simon, Mrs D. — b L Mintz, Miss B. — a L Mintz, Miss B. — a M c Gamete-, ovo- and spermato- genesis Dan, Mrs J. C. — a EV Vannini, E. — d C Bielanska-Osuchowska, Mrs Z. — b D Tahmisian, T. N. — c (4)D Clavert, J. — a Kanoh. Y. — a Clavert, J. — a Clavert, J. — ^ a Austin, C. R. — a Bishop, M. W. H. — a Hamilton, W. J. and Harrison, R. J. — a Harrison, R. G. — a Harrison, R, G. — b Katsh, S. — a MacMillan, E. W. — a, d MacMillan, E. W. — c d Maturation Dan, K. — c e Ovulation and oviposition Runner, M. N. — a £ Activation and fertilization Ginsburg, Mrs A. S. — a Kanoh, Y. — a Kille, R. A. — a Moricard, R. — c Austin, C. R, — a Bishop, M. W. H. — a Braden, A. W. H. — a Chang, M. C. — e Cheney, R. H. — b Runner, M. N. — a g Parthenogenesis Astaurov, B. L. — a Harvey, Mrs. E. Browne — a Chang, M. C. — e Edwards, R. G. — a 5 Cleavage and mitosis a Cleavage Dan, K. — a G Geilenkirchen, W. L. M. and Zeuthen, E. — c (4)G Marsland, D. A. — a (4)G (6)1 I (6)K (6)L M M M M (4)M (5)M M (6)M (6)M I I I M M M M M (5)M (6)M D G M M 165 J I L (5)M II. 5a Battle. Miss H. I.-b (5)1 Colombo. G. — b (6)J Sirakami, K. I. — a b Mitosis Kalian. A. J. B. — a Corliss. C. E. — c Hintzsche, E. — b 6 Further development o[ Invertebrates a General subjects (including complete development) Bonner. J. T. — a. b PI Billett, F.. Perry, Miss M. M. and Waddington. C. H. — a (5)EV (5)P A B Hanson, E. D. — c Brondsted. H. V. — b Hale. L. J. — a Mookerjee. S.. Sanyal S Nagarajan, S. N. and Sinha. A. — b Sembrat. K. — a Costello. D. P. — a Ghirardelli. E. — a Macfadyen, A. — a Monne, L. — a Sugino. H. — a Bednjakova, Mrs T. A. Bodenstein. D. — c Bookhout, C. G. — b Costlow. J. D. — a Ede. D. A. — b Geyer-Duszynska, Mrs I. — a Goto. T. — b Hama, T. — b Jura, Cz. — a Krause. G. — a Liischer. M. — a Mori, H. — a Niiesch, H. — a Rappaport. Jr, R. — b Takami, T. — b Verejskaja, Miss V. N. — a Yoshikura, M. — a Geilenkirchen, W. L. M. and Raven, Chr. P. — b Hartung, E. W. — b Kawakami. Mrs K. I. — d Raven, Chr. P. — a Schneider, D. — d B B C (5)C C c c (4)D D (4/5)D D D a D (5)D (5)D D D D (5)D D D D (4)D (4)D (5)E E E (5)E F II. 6e (5)G (5)G G (5)G H Cheney, R. H. — a Gustafson, T. and Horstadius, S. — a, c Harvey. Mrs E. Browne — b Harvey, Mrs E. Browne — g Brewin, B. I. — a b Topogencsis Clement, A. C. — a Verdonk, N. H. — a Kanatani, H. — b c Determination of „Priiniti entwicklung" Selman, G. G. — a Holm, K. A. — a Krause, G. — b Sander, K. — a Schoeller. Miss J. — a Yajima, H. — a Clement, A. C. — a' Fibers. P. F. — b Hess, O. — a Raven, Chr. P. — c Citterio, P. — a Fibers. P. F. — c Horstadius. S. — a Lalher, R. A. — c Lindahl, P. E. — a Runnstrom, J. A. M. — a Farinella-Ferruzza, Mrs N. — b d Development of part of the organism Haget. A. — a Lobbecke, E.-A. — b Pohley, H.-J. — a Razimbaud. Miss J. — a c Development of special organ systems Naylor. E. — a E (5)E G (3)EV D D D D D E (5)E E E G (5)G G G G G -b H Skin Kuhn, A. — b D Schwartz, V. — a D Schneider, D. — b, e F Nervous system Olsson, R. — b Special sense organs Wolsky, A. — b H D 166 II. 6e II. 7a Skeleton Okazaki, Miss K. — a G Muscular system Alimentary system Raven, Chr. P. — c E Respiratory organs Heart, vascular system and blood Coelomic cavities and endothelia, lymphatic system and connective tissue Urogenital system and sexual differentiation Katakura, Y. — a D Legrand, J. }. — a D Pantelouris, E. M. — a D Aubry, Miss R. — b E Harvey, Mrs E. Browne — d (4)G Endocrine glands Lii.scher, M. — b D f Histo- and cytogenesis Astaurov, B. L. — d (4)D Geigy-Heese, R. — d D 7 Further development of Vertebrates a General investigations General subjects Kuhn, O. — c (5) Nicholas, J. S. — c Kawakami, I. — b (5)V Battle. Miss H. I. — c (4)1 Clavert, J. — b I Hama, T. — b (5)1 Lutz, H. and Lutz-Ostertag, Mrs Y. — c I Oppenheimer, Miss J. M. — b I Pflugfelder. O. — c I Welander, A. D. — a (4)1 Anton, H. J. — b J Bondi, C. — ■ c J Brachet, J. L. A. — b (5)J Brunst. V. v. — a J Curtis, A. S. G. — b J Deuchar, Miss E. M. — a (5)J Elsdale, T. R. and Fischberg, M. — a J Goto, T. — b (5)J Hama, T. — b (5)J Hartung, E. W. — c Kemp, N. E. — b Liedke, Mrs K. Beyer — a Mangold, O. — a Mookerjee, S., Adhikari, S., Balasubramaniam, K., Nurjahan, Miss B. and Bose. Miss A. — d Nakamura, O. — d Okano, H. — a Pflugfelder, O. — c Rossi, A. — a Singer, M. — a Stultz, W. A. — a Takaya, H. — b Vahs, W. — c Vainio, E. T. — a Vintemberger, P. — a Benoit„ J. — a Clavert, J. — b Pflugfelder, O. — c Abercrombie, M. — a Bagiiiski, S. — b Bose, A. — b Clavert, J. — b Curtis, A. S. G. — b Evans, H. J. — a Harrison, J. R. — b Horn, E. C. — b Huble, J. — a Kawakami, Mrs K. I. — b Koecke, H.-U. — b Lutz, H. — b Lutz, H. and Lutz-Ostertag, Mrs Y. — May, R. M. — b Mookerjee, S., Adhikari, S. Balasubramaniam, K., Nurjahan, Miss B. and Bose, Miss A. — d Nicholas, J. S. — h Pflugfelder, O. — c Rembielinski, B. — a Vintemberger, P. — a Wolff, Et. C. — a, f Auerbach, R. — a Austin, C. R. — a Beatty, R. A. — a Bishop, M. W. H. — a Cheney, R. H. — b Dokter, H. }. — b J J (5)J (V5)J J J } J (5)1 J J (5)J } (5)HV K K L (5)L (4)L L L (6)L L (5)L L (5)L L L e. f (5; L L L L L L M M M M (5)M (5)M 167 II. 7a II. 7c Evans. H. J. — a (6)M Gates. H. J. — b M Grobstcm, C. — a M Hicks, S. P. — a (4)M Levak, Miss B. and Skreb, N. — a (5)M May. R. M. — ^ M McLaren, Mrs. A. and Michie, D. — a M Moog. Miss F. — b (6)M Nicholas. J. S. — f (4)M Nicholas. J. S. — g. h M Sauser, G. — a M Sinclair. J. G. — c (5)M Wolff, Et.C. — f M Wrba, H. — b M Complete development Partial development Battle. Miss H. I. — d Devillers, Ch. — b Colombo. G. — b Green, Mrs E. U. — a Manelli, E. and Pasquini, P. — d Mazzoni-De Cesare, Mrs I. and Pasquini. P. — d (4) J Takaya, H. — c (4)| Watanabe. T. — a (4) J Wilde Jr, C. E. — b J Zwilling, E. — a L Implantation and placentation (5)1 I (6)J (5)J (4)] Runner. M. N. — a (6)M Wrba. H. — b M b Topogenesis Nakamura, O. — a J Wilens, Miss S. W. — a I Schlesinger, A. B. — b L Seno, T. — a L Early development Lovtrup, S. — c Gastrulation and formation of germ layers Castigli-Pitotti. Mrs M. — a Lovtrup, S. — c Malan. Miss M. E. — a Neurulation Rossini, Miss M. C. — a 168 Formation of neural crest Boddingius, Miss J. — a J Mina. E. Y. — a J Rossini, Miss M. C. — b J Wilde Jr, C.E. — a J Azoubel. R. — a L Koccke, H.-U. — c L First larval development Kato, K. — a Muchmore, W. B. — a Fowler, I. — a c Induction, determination, etc. Alonso, Miss M. — a Balinsky, B. I. — a Brahma, S. K. — b Induction Englander, H. — a Eyal-Giladi, Mrs H. — a, b. c Gallera, J. — c Hama, T. — a Holtfreter. J. K. F. — b Jansen, J. G. O. — a Johnen, Miss A. G. — a, b Kuusi, Miss T. K. — e (5)j Lallier, R. A. — b Masui. Y. — a (5)] Mifune, S. — a Moore, J. A. — c Nieuwkoop. P. D. — a, b, c Reyer, R. W. — b Rollhauser-ter Horst, Mrs J. O. B. — a (5/6); Sala, M., S.J. — a Schreiber, B. — b Schreurs, A. F. — a Sladecek, F. — b Spofford. W. R. — a Takata, Miss C. and Yamada, T. — a Toivonen, S. I. — a, c Trampusch, H. A. L. — d Vahs. W. — a Woellwarth, C. v. — a, b Grabowski, C. T. — a, b, c L Schreiber, B. — b L Spratt Jr, N. T. — d L Woerdeman, M. W. — b L Mifune, S. — a M Nicholas. I. S. — b M II. 7c II. 7e. 2 Woerdeman. M. W. — b M Determination Citterio, P. — a Denis, H. A. — a Fischiarolo, G. — a Horstadius, S. — b Islam, A. — a Lallier, R. A. — c Mangold, O. — c Raunich, L. — c Spofford, W. R. — a Tahara, Y. — a Woerdeman, M. W. - -b L Woerdeman. M. W. - -b M Regulation and organization Hay, Miss D., Vivien, J. H. and Schott, J. — a Blackler. A. W. — b Boterenbrood, Miss E. C. — a Cury, G. — a Draisma, J. R. — a Mina. E. Y. — b Schreurs, A. F. — b Sembrat, K. — d Sembratowa-Opoczynska, Mrs Z. — a Sladecek, F. — a Amprino, R, M. — b, c Grabowski, C. T. — a, b, c Hampe, A. — a, b Kawakami, I. — a L L L M d Development of part of the organism Head Mangold, O. — b J Grabowski, C. T. — a, b, c L Huber, W. — a M Extremities Frangois, Y. — a I Harrison, R. G. — a O'Brien, J. P. — a Stinson, B. D. — c (4) Stultz, W. A. — b Wilde Jr, C. E. — a Amprino, R. M. — a, b L Hampe, A. — a L Saunders. J. W. — c, e, h L Zwilling, E. — c L Huygnard, C. — a M Tail Bijtel, Miss J. H. — a Farinella-Ferruzza, Mrs N. — a Kiortsis, V. — c (6) Nakamura, O. — b O'Brien, J. P. — a e Development of special organ systems Skin General subjects Lyne, A. G. — a M Exo'skeleton Teeth Brouwer, P. J. and Dankmeijer, J. — a M Cohn, S. A. — c M Niizima, M. — a M Hair, horns, nails Chase, H. B. — b Chase, H. B. — c Lyne, A. G. — a Feathers Kuhn, O. — b Saunders, J. W. — d Sengel, Ph. — b Watterson, R. L. — d Sense organs Glands Gomot, L. — a Lutz, H. — g Mammae Pigment cells and patterns Hama, T. — c Hishida, T. — c Mori, Y. — a, b Andres, G. — b Hama, T. — c Nowakowna, Miss J. — b Hamilton, H. L. — b Koecke, H.-U. — c Menkes, B. — a Sengel, Ph. — a WiUier, B. H. — b Chase, H. B. — b Markert, C. L. — b Nervous system General subjects Stefanelli, A. — a M (4)M M L L L (6)L (6) L L L L L M M 169 II. 7c. 2 Gallcra. J. — b Hollfroter, J. K. F. — b Spofford. W. R. — b Godina, G. — a, b Sidman. R. — a Thillard, Miss M. J. — a Wenger, B. S. — a Bodemer. C. W. — a Eayrs. J. T. — a Sidman. R. — a Central nervous system Bergquist. H. — a Olsson, R. — b Deroux. G. — a Baltzer. F. and Chen, P. S. Gallera, J. — c Jacobson, D. C.-O. — a Kallen, A. J. B. — a Kollros, M- — d Romanovsky, A. — a Sladecek, F. — a Takaya, H. — a Woellwarth, C. v. — a Corliss, C. E. — c Grabowski, C. T. — a, b. c Kallen, A. J. B. — b McCallion, D. J. — a Watterson, R. L. — d Bodemer, C. W. — a Brain Oppenheimer, Miss J. M. — Boterenbrood, Miss E. C. - Denis, H. A. — a Kollros. J. J. — a Coulombre, A. J. and Coulombre, J. L. — c Dossel, W. E. — a Grignon, G. — b Harkmark, W. — a Spinal cord Stultz, W. A. — c Accessory organs Paraphysis Parietal organ Pineal body Oksche, A. A. — b Moszkowska, A. — a Thillard. Miss M. J. — b Venzke. W. G. — c II. 7e. 3 I I J L L L L M (6)M M V V I L L L L (6)L M L L M M (4)] L L M Hypophysis (sec also under endocrine glands) Eyal-Giladi. Mrs H. — c Thurmond. W. — b Grignon, G. — a Ganglia Ccplialic ganglia Rebert, R. R. — a Spinal ganglia Nerves Sala, M., S.J. — b Para' and sympathetic and intramural nervous system Para- and sympathetic nervous system Hammond, W. S. and Yntema, C. L. — a Vacek, Z. — b Intramural nervous system Meninges Special sense organs Nasal organ Eye Baltzer, F. and Chen, P. S. — b Gable — Gubbay, Mrs V. — a Kollros, J. J. — g Mina, E. Y. — b Amprino, R. M. — c Harrison, J. R. — a Reinbold, R. — b Rugh, R. — c Sinclair, J. G. — d Eye (s.s.) Lopashov, G. V. — a Sembrat, K. — d Sembratowa-Opoczynska, Mrs Z. — a Stroeva, Miss O. G, — c Stroeva, Miss O. G. — b Lens Becker, U. — b Brahma, S. K. — b Reyer, R. W. — b Tahara, Y. — a McKeehan, M, S. — a Ear Benoit. J. A. A. — a Guardabassi, Miss A. — Harrison, R. G. — b Yntema, C. L. — a J (5)J M (5/6) J J I 170 II. 7e. 4 Benoit, J. A. A. — a L Schlesinger, A. B. — d, e M Lateral sense organs Skeleton General sttbjects Kalin, J. — b J Okada, T. and Waddington, C. H. — a J Schreiber, B. — b J Sirlin, J. L. and Waddington, C. H. — d J Kieny, Mrs M. A. — a L Schreiber, B. — b L Seno, T. — b L Zahnd. J. P. — a L Crelin, E. S. — a M Felts, W. J. L. — b M Okada, T. and Waddington, C. H. — a M Zaaijer, Miss J. J. P. — a M Embryonic temporary endo'skeleton Grabowski, C. T. — c L Skull and visceral skeleton Srinivasachar, H. R. — b I Coulombre, A. J. and Crelin, E. S. — f L Hammond, W. S. and Yntema, C. L. — b L Ford, E. H. R. — b (6)M Truncal skeleton Francois, Y. — a I Orska, Miss J. — b (4)1 Runner, M. N. — b M Skeleton of extremities Watterson, R. L. — d ( 6 ) L Joints Crelin, E. S. — a M Muscular system General subjects Konigsberg, I. R. — b (6)L Herrmann, H. and Konigsberg, Mrs U. Rothfels — c M Skeletal muscles (head, trunk and tail) Visceral muscles (head and trunk) Hammond, W. S. — c L Muscles of extremities Alimentary tract General subjects Nakamura, O. — c J II. 7e. 9 Mouth' and pharyngeal cavities Boschwitz, Miss B. D. — a J Intestinal tract Coulombre, A. J. and Coulombre, J. L. — a, e L Weniger, J. P. — a L Foley, Mrs E. P. — a M Weniger, J. P. — a M Proctodaeum Salivary glands Liver Croisille, Y. — a L Filogamo, G. — a L Marin — Lewin, Mrs L. — a L Watterson. R. L. — d (6)L Watterson, R. L. — f (5)L Pancreas Respiratory organs (jeneral subjects External gills Durante, Miss M. — a J Wilde Jr, C. E. — a J Internal gills Lungs and larynx Watterson, R. L. — e (6)L Wolff, Mrs Em. — a L Air-bladder Heart, vascular system and blood General subjects Condorelli, M. — a M Heart Haan, R. L. De — b (5)L Rychter, Z. — a L Arterial and venous system Rychter, Z. — a L Stephan, Fr. — b L Capillary system Blood Brodowa, Mrs Ch. Grabie — a (6) J Manelli, E. — b J Lemez, L. — b L Watterson, R. L. — d (6)L Coelomic cavities and endothelia, lymphatic system and connective tissue Coelomic cavities and endothelia Lympathic system Gyllensten, L. }. W. — a (6)M 171 II. 7e. 9 Coancctivc tJsMic Menschik. Z. - b Urogenital system and sexual differentiation General subject* Wolff. Et. C. Stcnc]cr-Haffcn. Mrs K., Wolff, Mrs Em. and Kicny. Mrs M. A. — d Grocncndijk — 'Huiibers. Mrs M. M. — a Reinboid, R. — a Watterson, R. L. — e Bengmark. S. and Forsberg, J. G. — b II. 7e. 11 M Kidneys Cambar, R. — a, b Fox, H. — a Fox. H. — b Manelli, E. — c Bens, J. — a Mitra, S. — a Ncphric ducts and bladder Bijtel, Miss J. H. — b HV L (6)L (6)L (6)M J (5)J J J K L Gonads Salzgeber, MissB. — b (5) Vannini. E. — b V Witschi. E. — f V D'Ancona, U. — a I Follenius, E. and J. H. Vivien — a I Bounoure, L. — a J Foote. Ch. L. and Foote. Mrs F. M. — b J Sabbadin, A. — b (6)1 Vannini, E. — c ] Stefan, Miss Y. and Vivien. J. H. — a K Hampe. A., Wolff. Et. C, Scheib-Pfleger. Mrs D., Salzgeber. Miss B. and Strudel, G. — c (6)L Limborgh, J. van — a L Marin. G. — a L Moszkowska. A. — a L Weniger. J. P. — a L Gaillard. P. J. — a M Rugh. R. — b (4)M Wcnigcr, J. P. — a Genital tracts Cambar, R. — d Stefan, Miss Y. and Vivien, J. H. — a Hampe, A., Wolff, Et. C., Scheib-Pfleger, Mrs D., Salzgeber, Miss B. and Strudel, G. — c Lutz-Ostertag, Mrs Y. — a Glenister, T. W. — a Accessory glands Sexual differentiation Salzgeber, Miss B. — a Querner, H. — ^b Yamamoto, T. — b Foote, Ch. L. and Foote, Mrs F. M. — a Hanaoka, K. I. — b Iwasawa, H. — b Lugli. Miss L. — a Romani, Miss M. L. — a Witschi, E. — c Witschi, E. — d Hampe, A., Wolff, Et. C, Scheib-Pfleger, Mrs D., Salzgeber, Miss B. and Strudel, G. — c Limborgh, J. van — b Lutz-Ostertag, Mrs Y. and Wolff, Et.— b Marin, G. — a Jost, A. D. — b Endocrine glands General subjects Iwasawa, H. — a Hypophysis (see also under nervous system) Dimond, Sister M. T. — a Grignon, G. — a Moszkowska, A. — a Lydecken, K. — a Thymus Thyroid gland Dossel, W. E. — b, c Tixier-Vidal, Mrs A. — a Brouwer, P. J. and Dankmeijer, J. — a Lydecken, K. — a 172 II. 7e. 11 Parathyroid glands Gonads Vannini, E. — b V Witschi, E. — f V Adrenals Willier, B. H. — a L Crowder, R. E. — b (6)M Pancreas Lievre, Miss Fr. — a (6)L f Histo- and cytogenesis Clark, H. — b Sauser, G. — e Shannon, J. E. — a Stefanelli, A. — a V Brouant, J. F. — a (5)J Steinberg. M. S. — b J Steinberg, M. S. — ^ c (5)J Levi. G. L. — b HV Wolff. Et. C.. Stenger-Haffen. Mrs K., Wolff, Mrs Em. and Kieny, Mrs M. A. — d HV Abercrombie, M. and Karthauser, Miss H. M. -b L Ebert, J. D. — d L May, R. M. — b L Moszkowska, A. — a L Sidman. R. — a L Zwilling. E. — b L Auerbach. R. — a M Grobstein. C. — a M Hintzsche, E. — c (4)M Sidman, R. — a M II. 8b a/b Growth and differentiation 8 Growth and differentiation (Invertebrates and Vertebrates) a Growth Cheney. R. H. — c (5) PL Altschul, R. — a (5/6) Green, Mrs E. U. — a (5)J Moment, G. B. — ^b J Oksche, A. A. — a (6) J Levi, G. L. — a HV Godina. G. — b L Thillard. Miss M. J. — a L Ford, E. H. R. — b (6)M Harrison, G. A. — a (4)M Hintzsche, E. — b (5)M Sauser. G. — e Wilde Jr. CE. — d (5)J Geigy-Heese. R. — d D Foote, Ch. L. and Foote. Mrs F. M. — b J Stone. L. S. — d J Wilde Jr. C. E. — d (2a)J Ebert. J. D. — d L May, R. M. — b L McKeehan. M. S. — a L Moszkowska. A. — a L Sidman. R. — a L Small, Miss J. E. — a L Sidman, R. — a M b Differentiation Bonner, J. T. — a PI Mookerjee. S.. Sanyal. S.. Nagarajan. S. N. and Sinha, A. — b B Tahmisian. T. N. — a D Lopashov, G. V. — b I Oppenheimer. Miss J. M. — b I Bondi, C. — c J Brouant, J. F. — a (5) J Draisma. J. R. — a J Kato. K. — a J Nakamura. O. — d J Okano, H. — a J Steinberg, M. S. — b J Steinberg, M. S. — c (5)J Takata, Miss C. and Yamada, T. — a J Wilde Jr, C. E. — b J Wolff. Et. C. Stenger-Haffen. Mrs K.. Wolff, Mrs Em. and Kieny, Mrs M. A. — d HV Clayton-Freedman, Mrs R. M. and Frohlich, A. — c L Fowler,- I. — b L Fowler, I. — c (5)L Kallen, A. J. B.— b L Zwilling, E. — a L Grobstein, C. — a M Markert, C. L. — b M Nicholas, J. S. — j M Schlesinger, A, B. — e M Stroeva. Miss O. G. — b M Wrba. H. — b M 173 III. PHYSIOLOGY OF DEVELOPMENT SUBDIVISION 1 Theoretical problems and general questions 2 Methods and techniques 3 General subjects (asexual development, reproduction, etc.) ■f Initial development a General subjects b Primordial germ cells c Gameto-, ovo- and spermatogenesis d Maturation c Ovulation and oviposition f Activation and fertilization g Parthenogenesis 5 Cleavage and mitosis a Cleavage b Mitosis 6 Further development of Invertebrates a General subjects (including complete development) b ..Primitiventwicklung" (including early development) ' c Induction and determination d Development of part of the organism e Development of special organ systems (Cf. general subdivision p. 153 — 155) f Histo- and cytochemistry g Serological and immunological studies 7 Further development of Vertebrates a General investigations 1 General subjects 2 Complete development 3 Later development 4 Implantation and placentation 5 Development of behaviour b ,, Primitiventwicklung" 1 Early development 2 Gastrulation 2,3 Gastrulation and neurulation 3 Neurulation 4 Development of neural crest c Induction, determination, etc. 1 Induction 2 Determination 3 Regulation and organization d Development of part of the organism 1 Head 2 Extremities 3 Tail e Development of special organ-systems (Cf. general subdivision p. 153 — 155) f Histo- and cytochemistry 74 III. 1 g Serological and immunological studies 8 Growth and differentiation (Invertebrates and Vertebrates) ^ a Growth a/b Growth and differentiation b Differentiation 9 Nutrition of embryo (Invertebrates and Vertebrates) CHARACTER OF INVESTIGATION ( 1 ) Metabolism and respiration (2) a) Biochemistry, b) Histochemistry, c) Cytochemistry (3) Physical properties (4) Physical treatment (5) Chemical treatment (6) Influence of hormones and vitamins III. 4c 1 Theoretical problems and Pasteels, J. — c (2c)EV general questions Mulnard. J. O.— b Weber, R. — b (2c)C C Willier. B. H. — c (6) Geilenkirchen. W. L. M. - -a (1)E 2 Methods and techniques Nijenhuis. E. D. — a (5)E Bednjakova, Mrs T. A. an Verejskaja, Miss V. N. — Roncoroni, G. — a d -b (4)D (2a)M Nijenhuis, E. D. — b Aketa, K. — b Brookbank. J. W. — a Brookbank. J. W. — b (2)E (2a/c)G (1)G (2c)G 3 General subjects Cheney. R. H. — d (1/5)G (asexual development, i reproduc- Hiramoto, Y. — b (3)G tion. etc.) Maggio. Miss R. ^ — a (1)G Johnson, D. C. — a Mulnard. J. O. — b (2c)G Spratt Jr, N, T. — f EV Aketa, K. — b (2a/c)I Gregg, J. H. — a P Ishida, J. — a (1)1 Mookerjee, S., Ganguly, B. and Sundell, L.-E. — a (1/2)1 Chowdhury, M. — c A Dollander, A. — a, b (3)J Nobih. R. — a C Minganti. A. — b J Crisp. D. J. — b D Rosenbaum. R. M. — c (2c)J Hanaoka, K. I. — a (6)D Sundell, L.-E. — a (1/2)J Frazer. J. F. D. — b {6)J Weber, R. — b J Butler, H. — a M Baiocchi, O.. Moricard, R . and Clegg, E. J. — a M Gothic. Miss M. M. C. S. Feo, V. J. De — a M - -a (1)M Gates, A. H. — a M McLaren, Mrs A. and Hunt, E. L. — b M Michi€, D. — b (6)M Pincus, G. — a M b Primordial germ cells Runner, M. N. — a Young, W. C — a,b M M c Gamete-, ovo- and spermatoge- nesis 4 Initial development Gray, J. and a General subjects Rothschild, Lord — a Jaffe, L. F.— a (3)P1 Tyler, A. — c EV+V Lehmann, F. E. — c EV Bielanska-Osuchowska, Minganti, A. — c (1)EV Mrs Z. — a (2)D 175 Ill 4c Rnnzoh, F. — a E Bernstcm, G. S. — a G Ficq. Mrs A. A. — c (1)G Vannini. E. — a (2)G Ranzoli, F. — a H Takeuchi. K. — a I Vannini. E. — a (2)1 Yamamoto. K. — a I Bernstein, G. S. — a J B.cbcr. S.— a (1)J Frazer. J. F. D. — a J Ficq. Mrs A. A. — c (1)J Ficq. Mrs A. A. — d (2a)I Glenister. T. W. — d (6) J Kemp. N. E. — a J Rostand. J. — c J Stefanelli. A. — d J Vannini, E. — a (2)J Stefanelli, A. — d L Austin, C. R. — a M Beatty, R. A. — e M Bernstein, G. S. — a M Bishop, D. W. — a (1)M Bishop. D. W. — b M Bishop, D. W. — c (2a)M Bishop. M. W. H. — a M Bodin, N.-O., Lindahl. P. E. and Ross, S. — a M Bryan, J. H. D. — a (2c)M Edwards, R. G. and Sirlin, J. L. — c M Glenister. T. W. — d (6)M Graumann, W. — a (2c)M Katsh. S. — a (5)M Kihlstrom. J.-E. — a M MacMillan, E. W. — b M Roosen-Runge. E. C. — a M d Maturation Bodenstein, D. — b (6)D Ando, S. — a I Humphries, A. A. — a J Belaisch, J., Moricard. R. and Gothic. Miss M. M. C. S. — a M Bryan, J. H. D. — b (2c/4)M c Ovulation and oviposition Kawakami, Mrs K.I. — e E Chang, C. Y. and Witschi, E. — b J Gothic, Miss M. M. C. S. and Moricard. R. — a M 176 III. 4g Strauss, F. — a M f Activation and fertilization Gray, J. and Rothschild, Lord — a Benazzi, M. — a C Colwin, A. L. and Colwin. Mrs L. H. — a C Dan. MrsJ. C. — b E Aketa, K. — a (1/2)G Ando, S. — b (1)G Bernstein, G. S. — b G Colwin, A. L. and Colwin, Mrs L. H. — a G Endo, Y. — b G Hagstrom, B. E. — a G Hori. R. — a (3)G Immers, J. — a (1/2)G Ishikawa, M. and Sugiyama, M. — a G Nakano, E. — a . G Numanoi. H. — a (2)G Runnstrom, }. A. M. — b G Swann, M. M. — a G Tyler, A. — a G Colwin, A. L. and Colwin, Mrs L. H. — a H Dettlaff. MrsT. A. — a (5) Dettlaff, Mrs T. A. — b {2} Hori. R.— a (3) Ito, S. — a. b, c Kanoh, Y. — b Kemp, N. E. — d Nakano, E. — a Yamamoto. T. — a Bernstein, G. S. — b Austin. C. R. — a M Beatty, R. A. — c M Belaisch, J.. Moricard, R. and Gothie, Miss M. M. C. S .—a M Bishop, M.W.H. — a M Chang. M. C. — a. b. c M Edwards, R. G. — b M Gothie, Miss M. M. C. S. a nd Moricard. R. — a M g Parthenogenesis Ishikawa. M. and Sugiyama. M. — a G Witschi. E. — a (1)J Schlesinger. A. B. — a (2/3)L Chang. M. C. — c, e M III. 5a III. 6b 5 Cleavage and mitosis a Cleavage Dan. K. — a G Dan, K. — b (2)G Geilenkirchen, W. L. M. and Zeuthen. E. — c {4)G Hiramoto, Y. — a G Kane, R. E. — a (2c)G Kojima-Kuno, M. — a G Sakai, H. — a (2)G Swann, M. M. — a G Zeuthen, E. — a (1)G Nicholas, J. S.—k V Belaisch, J., Moricard, R. and Gothie, Miss M. M. C. S. — a M Chang, M. C. — a M b Mitosis Okazaki, R. and Okazaki. MrsT. — b (1/2)P Swann, M. M. — b P Kuriki, Y., Okazaki, R. and Okazaki. Mrs T. — a (1/2)G Kuriki, Y., Okazaki, R. and Okazaki. Mrs T. — a (1/2) J Kuriki. Y.. Okazaki, R. and Okazaki. MrsT. — a (1/2)L Bryan, J. H. D. — b (2c/4)M 6 Further development o[ Invertebrates a General subjects (including complete development) Bautzmann, H. — c EV Billet, F., Perry, Miss M. M. and Waddington, C. H. — a {5)EV Cigada-Leonardi, Mrs M. — a (1)EV Mancuso. V. — a (1/2)EV Minganti. A. — c (1)EV Reverberi, G. — a EV Dasgupta, B. — a (2c)P Hanson, E. D. — b (2)P Mookerjee. S., Hajra, B.. Waidyasekara. L. and Alamelu. M. G. — a {2)P Brondsted. H. V. — b A Ganguly. B. — a (2c) A Mookerjee, S., Ganguly, B. and Chowdhury, M. — c A Lallier, R. A. — e B Mookerjee. S., Sanyal, S.. Nagarajan, S. N. and Sinha. A. — b B Amy. R. L. — b (4)D Bodenstein. D. — d (6)0 Brunold. Miss E. — a (2)D Crisp. D. J. — a D Denuce. J. M. — a D Engelmann. F. — a (6)D Isings. J. — a D Jones, B.M. — b (3)D Jura, Cz., Krzysztofowicz, Miss A, and W?glarska, Miss B. — b (2b)D Kato, M. — a D Kato, M. — a D Ludwig, D. — a, b (1)D Perry, Miss M. M., Waddington, C. H. and Selman, G. G. — b (2c)D Pflugfelder, O. — a (1/6)D Rae-Wickham. MrsC.A. — a (6)D Rockstein, M. — a D Rockstein, M. — b (2a )D Seidel, F. — b D Shulov, A. — a D Shulov, A. — b (1/2)D Tahmisian, T. N. — a (1)D Takami, T. — a D Geilenkirchen, W. L. M. — a ( 1 ) E Kawakami, Mrs K. I. — c (1)E Schneider. D. — a F Backstrom. S. A. A. — a (1)G Immers, J. — a (1/2)G Kaltenbach, Mrs J. C. and Perlmann, H. P. — a (2)G Lindberg, N. O. H. — a (l/2a)G Nakano, E. — a G Ranzi. S. — a (2a)G Yanagisawa. T. — b (1)G Durante. Miss M. — b (1/2)H Evola-Maltese, Mrs C. — a (1/2)H Fischiarolo. G. — b (1)H Restivo. Miss F. — a (2a)H b „Primitiventvvicklung" (including early development) Mancuso. V. — b EV Mulnard, J. O. — b (2c)C Amy, R. L. — a (4)D 177 III. 6c III. Clement. A. C. — b E Clement. A. C — c (l/2c)E Pastecls, J. — b (2)E Ando. S. — b (1)G Butros. I.M. — a (1/3)G Cheney. R. H. - d (1/5)G Gustafson. T. — a G Maggio. Miss R. — a (I)G Monroy. A. — a G Mulnard, J. O. — b (2c)G Okazaki. Miss K. — b G Pastcels. J. — b (2)G Tyler. A. — b G Dalcq. A. M. — a (2c)H c Induction and determination Horstadius, S. — a G Hultin. J. M. T. — a (1)G Runnstrom, J. A. M. — a G d Development of part of the organism c Development of special organ systems Skin Nervous system Hubl. H. — a Olsson. R — b Special sense organs Bodenstein, D. — e Skeleton Muscular system Alimentary tract Respiratory organs Heart, vascular system and blood Coelomic cavities and endothelia, lymphatic system and connective tissue Urogenital system and sexual differentiation Lallier. R. A. — d Legrand, J. J. — a Pantelouris. E. M. — a Endocrine glands Jones, B. M. — a Pflugfelder. O. — e f Histo-and cytochemistry Gustafson. T. — d ( 1 ) 178 C H (2a)D Pasteels. J. — c EV Hajra. B. — a P Hamburger, K., Plesner, P. and Zeuthen. E. — a P Mulnard. J. O. — b c: Weber, R. — a C Baltus, Miss E. — a G Mulnard. J. O. — b G Dalcq. A. M. — a H g Serological studies Finger. I. — a P Gregg, J. H. — a P Brookbank, J. W. — a. b G Kaltenbach. Mrs. J. C. and Perlmann. H. P. — a G Ranzi, S. — a G Tyler. A. — d G 7 Further development of Vertebrates a General investigations General subjects Castigli-Pitotti. Mrs. M. — c (1) Hartwig, H. — a (6) Kuhn. O. — a (6) Vanderhaege-Hougardy, Mrs F. — a Bautzmann.H. — c V Cigada-Leonardi, Mrs M. — -a (1)V Devillers. Ch. — a I Gilbert. P. W. — b I Nakano. E. — a I Takeuchi, K. — a I Tracy, H. C. — b I Zotin. A. I. — a (1)1 Backstrom, S. A. A. — a (1)J Bieber, S. — a (1)J Billett. F. — b (2a)J Bondi. C — b J Brachet, J. L. A. — c {2a)J Cheney. R. H. — f (5)J Curtis. A. S. G. — a (3)J Dent, }. N. — a (1)J Deuchar. Miss E. M. — a (1/5)1 Ficq. Mrs A. A. — a (5)J Finamore, F. J. — a (2a)J Finamore. F. J. — b (2b)J Goto, T. — a (2a)J Gregg, J. R. — a, b (1)J Hunt, E. L. — a (1)1 III. 7a III. 7a Karasaki, S. — b J Gonzalez, F. — a, b (4)L Kemp. N. E. — b (1)J Gonzalez, F. — c (2a)L Lallier, R. A. — a (2)J Hamilton, H. L. — a (1)L Liedke, Mrs K. Beyer — a (5)J Horn, E. C — a (2c)L Liotti, F. S. — a (1)J Horn, E.G. — b (5)L Lovtrup, S. — b (1/4)J Jones, B. M. — b {3)L Mookerjee, S., Adhikari, S., Konigsberg, I. R. — a (1/6)L Balasubramaniam, K., Lanzavecchia, G. — a (1)L Nurjahan, Miss B. and Markert, C. L. — d (1)L Bose, Miss A. — d J Menkes, B. — c {2a)L Moore. Mrs B. Clark — b (2c)J Moog, Miss F. — a (1)L Nace. G. W. — a (2a)J Mookerjee, S., Adhikari. S. Nicholas, J. S. — d, e J Balasubramaniam. K., Norman, C. — a (2c)J Nurjahan, Miss B. and Okano. H. — b J Bose, Miss A. — d L Perry. Miss M. M.. Rembielihski, B. — a (5)L Waddington. C. H. and Romijn, C. — a, b (1)L Selman, G. G. — b {2c)J Rudnick, Miss D. — a (1)L Peters. Th. — a (4)J Stefanelh, A. — c L Ranzi. S. — a (2a)J Steinberg, M. S. — a L Rappaport, Jr, R. — a J Wilt, F. H. — b (5)L Raunich, L. — f (2)J WiHiams, J. — a (2a)L Rocca, E. — a (2/3)J Alexander, G. — a M Rosenbaum. R. M. — a (1)J Adams, Miss E. C, Hertig, A.T. Selman, G. G. — b (3)J and McKay, D. G. — b (2)M Singer, M. — a (5)J Austin, C. R. — a M Stefanelli, A. — c J Berg, G. G. — b (2)M Steinberg, M. S. — a J Bishop, M. W. H. — a M Stultz, W. A. — a J Caspari, E. W. — a M Thomason, Miss D. — a {4)J Feldman, M. and Tiedemann, H. — a (2)J Yaffe, D. — a (2a)M Tiedemann-Waechter, Fitzgerald, L. R. — a (4)M Mrs. H. — a (2)J Fitzgerald, L. R. — c (1)M Tomita, H. — b J Grobstein, C. — a M Vahs, W. — c (5)J Hintzsche, E. — a (1)M Volpe, E. P. — a (4)J Hoessels, Miss E. L. M. J. Yanagisawa, T. — a (1)J — c (2a)M Bautzmann, H. — b HV Hunt, E. L. — b M Wolff, Mrs Em. — b (1)HV Langman, J. — b (2a)M Clark. H. — a K Markert, C.L. — d (DM Tencer. Miss R. — a (2a)L Moog, Miss F. — a (DM Barbieri, F. D, — a (4)L Moog, Miss F. — b (6)M Beard, R. G. — a (2a)L Mulnard, J. O. — a (1/2)M Billett, F. — b (2a)L Nicholas, J. S. — d, e (1/2)M Bose, A. — a (2a)L Osawa, S. and Clark, H. — a (1)L K. Takata — b (2a)M Croisille, Y. — b L Pantelouris, E. M. — b (2a)M Curtis, A. S. G. — a (3)L Retry, G. — a M Feldman, M. and Seidel, F. — a M Yaffe. D. — a (2a)L Stein, Miss K. F. — b (2b)M Eraser, R. C. — a L Waelsch, Mrs S. Gluecksoh n — bM 179 in. 7a Wrba. H. — a (DM Complete development G.lbcrt. P. W. — b I Later development Battle. Miss H. I. — d (5)1 Ignatjeva, Mrs G. M. — a (2a)I Fitzgerald. L. R. — b (1)M Implantation and placcntation Belaisch. ].. Moricard, R. and Gothic. Miss M. M. C. S. — a M Boving, B. G. — b M Corner. Jr, G. W.. Ramsey. Miss E. M. and W. N. Long — a M Feo.V. J. De — b (5)M Fee. V. J. De — c M Gitlin. G. — c M Graumann. W. — a (2c)M Hamilton. W. }. and Harrison, R. J. — b M Pincus, G. — a M Ramsey. Miss E. M. — b M Reynolds, S. R. M. — b M Wimsatt. W. A. — a (2b)M Development of behaviour Bautzmann, H. — c V Armstrong, P. B. — b I Harris, J. E. and Whiting, H. P. — a Tracy, H. C. — a Armstrong. P. B. — b Fankhauser. G. — c Sladecek. F. — a Menkes. B. — d L Hooker, D. — a. b M Hooker. D. and Humphrey, Miss T. — c M Humphrey, Miss T. — a M Rugh, R. — d (4)M b MPrimitiventwicklung" (including early development) Inoue. Miss K. and Ishikawa, T. — a, b (2a) Hishida, T. and Nakano, E. — a (1)1 Bautzmann. H. — a J Deuchar. Miss E. M. — b (1)J Green. Mrs E. U. — a (2c/5)J Ikushima, N. — a J 180 III. 7c Spratt Jr, N. T. — a (1)L Spratt Jr. N. T. — b (1/2)L Spratt Jr.. N. T. — e L Adams, Miss E. C.. Rock, J- Mulligan. W. J. and Hertig, A. T. — a (2)M Boving, B. G. — c M Dalcq. A. M. — a (2c)M Edwards, R. G. and Sirlin. J. L. — c (l)M Jurand. A. — c (5)M Early development Lovtrup, S. — c I Gastrulation Amelio. V. D' — a (2a)J Ceas, Miss M. P. — a (2a)J Lovtrup, S. — c J Tencer, Miss R. — c (1)J Neurulation Development o[ neural crest c Induction and determination, etc. Induction Becker, U. — a J Brachet, J. L. A. — d (2a)j Brahma, S. K. — a (3)J Brahma, S. K. and Sirlin, J. L. — c (2)J Ficq, Mrs A. A. — b J Fujii, T. — b (2)J Hama, T. — a (2)j Holtfreter, J. K. F. — a Jansen, J. G. O. — a Johnen, Miss A. G. — b Kawakami, I. — c, d Kuusi, Miss T. K. — a, b. c, d Mifune, S. — b (2) Nieuwkoop, P. D. — b Osawa, S., K. Takata and T. Yamada — a Saxen, L. O. and Toivonen, S. I. — a Schreiber, B. — a Tencer. Miss R. — b Vahs. W. — b (2) Woerdeman, M. W. — c Schreiber. B. — a L Woerdeman, M. W. — c L Kawakami, I. ^ — c. d M Mifune. S.— b (2)M III. 7c III. 7e. 2 Osawa, S., K. Takata and Tracy, H. C. — a I T. Yamada — a M Lavarack, J. O. — a (2)L Determination Hoessels, Miss E. L. M . J. -c (2a)M Regulation and organization Preto Parvis, Mrs V. — a (2c)M Tamanoi, I. — a (2)J Central nervous system Kawakami, I. — a Tamanoi, I. — a M (2)M Olsson, R. — b Shen, S. C. — a V (2)V d Development of part of the Boell, E. J. — b (1)J ^ganism Keller, L., Roofe, P. G. . and Head Wenger, Mrs E. L. ■ — a (2b)] Extremities Roofe, P. G., Mrs E. L. Wenger and B, S. Wenger — a (2a/c)J Milaire, J. — a (2c)V Stultz, W. A. — a J Stultz, W. A. — b J Tencer, Miss R. — b J Hinrichsen, K. — a (2)M Boell, E. J. — b (1)L Tail Watterson, R. L. — d, h (2/6)L e Development of special organ Wenger, B. S. — c Wyttenbach, C. R. — a (2a/b)L (2)L systems Brain Skin Miale, Miss I. — a (2b)V General subjects Oksche. A. A. — c V Preto Parvis, Mrs V. — d (2b)M Chang, C. Y. — a J Exo-skclcton Szentagothai, J. — a (5)J Teeth Assenmacher, I. • — a L Greulich. R. C. — b (2b/3)V Gayet, }. F. — a (2a)L Hinrichsen, K. — a (2)M Gayet, ]. F. and Hair, horns, nails Bonichon, Miss A. — c (2c)L Isings, J. — b M Gayet, J. F. and Feathers Schwander, J. ^ — b (2a)L Sense organs Schalekamp, M. A. D. H. — a (2a)L Glands Ariens Kappers, J. — a (2)M Gomot, L. — a L Preto Parvis, Mrs V. — c (2)M Cohn, S. A. — b (2)M Spinal cord Mammae Accessory organs Pigment cells and patterns Paraphysis Hama, T. — c Matsumoto, J. — a (2)1 (2a)I Parietal organ Mori. Y. — b (2)1 Pineal body Hama, T. — c (2)J Zwan, A. Van der — a Obika, M. — a (2a)I Pflugfelder, O. — c I Tomita, H. — b J Pflugfelder, O. — c J Ebert, J. D. — c (2b)L Pflugfelder, O. — c K Hamilton, H. L. — b L Andres, M. Y. — a L Saunders, J. W. — b L Pflugfelder, O. — c L Willier, B. H. — b L Venzke. W. G. — a L Saunders, J. W. — b M Hypophysis (see also under Nervous system endocrine glands) General subjects Assenmacher, I. — a L 181 III. 7c. 2 Ganglia Cephalic ganglia Sz^kcly, G. — a J Spinal ganglia Nerves Shcn. S. C. — b J Parm' and sympathetic and intramural nervous system Para- and sympathetic nervous system Guth. L. — a M Intramural ncriK>us system Special sense organs Nasal organ Eye Stone, L. S. — e J Harrison, J. R. — a L Meyer, D. B. and ORahilly. R. — a (2b)L Eye (s.s.) Lopashov, G. V. — a J Stroeva, Miss O. G. — c (5) J Takisawa, A. — b (2)1 Coulombre, A. J. and Coulombre. J. L. — b, d L Coulombre, A. J. and Coulombre, J. L. — g (2b) L Takisawa, A. — b (2)M Uns Gate. G. ten — a (2)J Gate, G. ten — a (2)L Doorenmalen, W. }. van — a (2b) L Langman. J. — a (2a)L Ear Skeleton General subjects Greulich, R. G. — b (2b/3)V Okada, T. and Waddington, G. H. — a J Schreiber, B. — a (2a)J Sirlin, J. L. and Waddington. G. H. — d J Kieny. Mrs M. A. — a (1)L Schreiber. B. — a (2a)L Okada, T. and Waddington. G. H. — a M Embryonic temporary endo-skcleton Skull and visceral skeleton Truncal skeleton Lavarack. J. O. — a (2)L 182 III. 7e. 8 Skeleton of extremities Joints Muratori< G. — a (2)L Muscular system General subjects Muchmore, W. B. — b (2a)J Wilde Jr, G. E. — c (2a) J Hayashi. Y. — a (2a) L Herrmann, H. and Konigsberg, Mrs U. R. — b L Herrmann, H., Konigsberg, I. R. and Samuels. A. J. — a (2)L Wilt, F. H. — c (1)L Skeletal muscles (head, trunk and tail) Visceral muscles (head and trunk) Muscles of extremities Templeton, M. and Wenger, B. S. — a (2a)L Alimentary tract General subjects Mouth- and pharyngeal cavity Intestinal tract Sigot, A. — a (1/2)L Sigot. M. — a (1/2)L Konopacka, Mrs B. — a (2)M Konopacka. Mrs B. — b M Proctodaeum Salivary glands Liver Armstrong. P. B. — a I Armstrong. P. B. — a J Weston. J. G. — a (2a/6)L Dick. D. A. T. — a M Pancreas Respiratory organs Creneral subjects Boell, E. J.— c J External gills Internal gills Lungs and larynx Wolff, Mrs Em. — a L Gruenwald, P. — b M Reynolds, S. R. M. — c M Heart, vascular system and blood General subjects Gondorelli, M. — a M Heart Ebert. J. D. and R.F.Ruth — a (2a)L III. 7e. 8 Ebert. J. D. and R. F. Ruth — b (1)L Haan, R. L. De — a (1)L Haan, R. L. De ^ b (5)L Chang, M. C. — d (4)M Hall, E. K. — a (5)M Arterial and venous system Muratori, G. — b (2)L Reynolds, S. R. M. — a, c, d M Capillary system Blood Manelli, E. — e (2a)J Lemez, L. — a L Venzke, W. G. — b L III. 7f Coelomic cavities and endothelia, lymphatic system and connective tissue Coelomic cavities and endothelia Lympathic system Connective tissue Preto Parvis, Mrs V. — b (2b) L Menschik, Z. — b M Urogenital system and sexual differentiation General subjects Stenger — Haffen, Mrs K. E. — c (1)L Backhouse, K. M. — a M Kidneys; nephric ducts and bladder Lynn, W. G. — b J Konopacka, Mrs B. — c (2b) M Gonads Foote, Ch. L. and Foote, Mrs. F. M. — b J Stefan, Miss Y. and Vivien, J. H. ~ a K Genital tracts Stefan, Miss Y. and Vivien, J. H. — a K Accessory glands Sexual differentiation Hanaoka, K. I. — b J Chang, C. Y. — c J Jost, A. D. — b M Endocrine glands General stibjects Witschi, E. — f V Querner, H. — a Rechenmann, R., Vivien, J. and Schott, J. — a Dimond, Sister M. T. — a Deth. J. H. M. G. van— a Konigsberg, I. R. — a Deth, J. H. M. G. van — a Jost, A. D. — a Moog, Miss F. — b Schaberg, A. — b Wells, L. J.— b Hypophysis (see also under nervous system) Nowakowna, Miss J. — a Radecka, Mrs E. Erdman — Sembrat, K. — c Szekely, G. — b Thurmond, W. — a, c Tixier-Vidal, Mrs A. — b Th5Tnus Thyroid gland Nowakowna, Miss J. — a Radecka, Mrs E. Erdman — Sembrat, K. — c Brodowa, Mrs Ch. Grabie — Koscielski, B. — a Lynn, W. G. — a Dossel, W. E. — c Sanir, Miss E. K. — a Parathyroid glands Gaillard, P. J. — b Gonads Leroy, P. J. M. — a Benirschke, K. — a Adrenals WiJlier. B. H.— a Kunski, H. — a Pancreas f HistO' and cytochemistry Fedoroff, S. — a Gustafson, T. — d Sauser, G. — b Kanoh, Y. and Yamamoto, T. S. — c Berg, G. G. — a Boell, E. J. — a Moore, Mrs B. Clark — b Schreiber, G. — a Stefanelli, A. — e H. I K L L M M M M M L M L (2b)M (2/4) (1) I (1)J J J J J 183 III. 7f Weber. R. — a J Tamanoi. I. Beard. R. G.-^ a L Clark. H. and Goldie, M. — d L Lavarack, J. O. — a 1^ Prcto Parvis. Mrs V. — b L Schreiber. G. — a L Stefanclh. A. — e L Berg, G. G. — a (1)M Dalcq, A. M. — a M Grauraann. W. — a M Johnson. F. R. — a M Martin. B. F. — a M Preto Parvis, Mrs V. — d M Roncoroni. G. — a M Schreiber, G. — a M g Serological and immunological studies Fedoroff, S. — b Inoue, Miss K. and Ishikawa, T. — a Bondi. C. — d J Clayton — Freedman, Mrs R. M. — a Kaltcnbach, Mrs J. C. — c Manelli, E. — a Muchmore, W. B. — b Nace. G. W. — a.b. c Ranzi, S. — a Tamanoi, I. — a Vainio, E. T. — b, c Billett, F., Clayton-Freedman, Mrs R. M. and Frohlich. A. — c L Ebert, J. D. — c L Ebert.J.D. and R.F.Ruth — a L Feldman, M. and Yaffe. D. — a L Langman, J. — a L Medawar, P. B. — a L Saunders, J. W. — g L Schalekamp, M. A. D. H. — a L Brambell, F. W. R. — a M Clayton — Freedman. MrsR. M. — d M Feldman. M. and Yaffe. D. — a M Halliday. R. — a M Hemmings, W. A. — a M Kelly. W. A. — a M Medawar, P. B. — a M Morris, I. G. — a M Saunders, J. W. — g M Short, B. F. — a M HI. 8b M 8 Growth and differentiation (Invertebrates and Vertebrates) a Growth Mitchison, J. M. — a Swann, M. M. — b Rockstein, M. — a Tuft, P. H. — a Gustafson, T. — b Greulich, R. C. — b Wurmbach, H. — a Baxter, E. W. — c Lahaye, Mrs J. — b Tuft, P. H. — a Andres, G. — a Green, Mrs E. U. — a Gustafson, T. — b Rappaport, Jr, R. — a Tisna-Amidjaja, D. A. Tuft, P. H. — a Wurmbach, H. — b Andres, G. — a Wurmbach, H. — b Beatty, R. A. — c Heim, W. G. — a P P D D (2/6)G (2b/3)V (6)V (6) (2c/5) (2/6) L L M M a/b Growth and differentiation Olbrich. E. — a (3) Vanderhaege-Hougardy, Mrs F. — a Hamburger, K., Plesner, P. and Zeuthen. E. — a (l/2a)P Fibers, P. F. — a E Foote, Ch. L. and Foote, Mrs F. M. — t I Stefanelli, A. — c J Wolff. Mrs Em. — b HV Croisille, Y. — b L Ebert, J. D. — d L O'Connor, R. J. — b (1)L Stefanelli. A. — c L Bryan, J. H. D. — d (2a)M O'Connor, R. J. — b (1)M b Differentiation Chiquoine, A. D. — a (2c) Finaer. I. — a P Mookerjee, S., Sanyal, S. Nagarajan. S. N. and Sinha, A. — b 184 III. 8b IV. 2a Sanyal, S. — a B Sirlin, J. L. — a (1)D Lopashov, G. V. — b (5)1 Clayton — ^Freedman, Mrs R. M. — a J Lovtrup, S. — a (2/4)1 Sirlin, J. L. — a (1)J Wilde Jr, C. E. — b (2)J Wilde Jr. C. E. — c (2a)J Grabowski, C. T. — a, b, c L Markert, C. L. — c L Sirlin. J. L. — a (1)J Clayton — Freedman, Mrs R. M. — d M Grobstein, C. — a M Markert, C. L. — c M 9 Nutrition o[ embryo (Invertebrates and Vertebrates) Macfadyen, A. — a C Baxter, E. W. — c I Tisna-Amidjaja, D. A. — a J Harrison, J. R. — a L Herrmann. H. and Konigsberg, Mrs U. Rothfels — b (6)L Schlesinger, A. B. — a L Simon. Mrs D. — a L Spratt Jr. N. T. — a L Williams, J. — a L Witschi, E. — g L Menschik, Z. — a M Miller, J. R. — a M Runner, M. N. — b M Wrba. H. — a M IV. DEVELOPMENT AND GENETICS SUBDIVISION 1 Theoretical problems and general questions 2 General genetical studies a General studies b Heteroploidy c Hybridization d Chimaera e Merogony 3 Analysis of influence of special genes and mutants a Special genes and mutants b Lethal factors 4 Phenocopies CHARACTER OF INVESTIGATION (1) Metabolism and respiration (2) a) Biochemistry, b) Histochemistry, c) Cytochemistry (4) Physical treatment (6) Influence of hormones and vitamins 1 Theoretical problems and general questions Landauer, W. — e Runner, M.N. — d 2 General genetical studies a General studies Callan, H. G. — a Finger, I, — a Benazzi, M. — a Naylor.E. — a C Papi, F. — a c L Astaurov, B. L. — ^d (4)D Barigozzi, C. — a D IVl Geyer-Duszynska, Mrs I. — -a,b D Johnson, G. — a D Legrand, J. J. — a D Poulson. D. F.— b, d D P Rothenbuhler. W. C. — a, b D C Ulrich, H. — a (4)D 185 IV. 2a Baxter. E. W. — b Hishida, T. — c Alonso. Miss M. — a Bondi, C. — c Colombo, G. — a Curtis, A. S. G. — a Elsdale, T. R. and Fischbcrg, M. — a Humphries. A. A. — b Moore, J. A. — a Volpe, E. P.— b Witschi, E. — c Bellvomini, H., Hoge, A. and Schreiber, G. — a K Curtis, A. S. G. — a L Mintz, Miss B. — b L Beatty, R. A. — b, e M Braden, A. W. H. — a M Caspari, E. W. — a M Eraser, F. C. — b M Gates. A. H. — b M Harrison, G. A. — a (4)M Harrison, G. A. — b, c M Huber, W. — a M McLaren, Mrs. A. and Michie, D. — a M Mintz, Miss B. — b M Rugh, R. — a M Sawin, P.B. — a M Waelsch, Mrs S. Gluecksohn — a M b Hctcroploidy Benazzi, M. — a C Costello, D. P. — a C Astaurov, B. L. — a D Rothenbuhler. W. C. — b D Fankhauser, G. and Humphrey, R. R. — a Fankhauser. G. — b, c Rosenbaum, R. M. — b (2c) Rostand, J. — a Schreiber, G. — a Schreiber, G. — a L Beatty, R. A. — a M Edwards, R. G. — a M Schreiber, G. — a M c Hybridization Astaurov, B. L. — b D Moore. A. R. — b G Minganti, A. — a H 186 IV. 3a Benazzi, M. — b J Brachet. J. L. A. — a (1)J Finamore, F. J. — c (1)} Gregg, J. R. - a, b (1)J Moore, Mrs B. Clark — a (2)J Moore, J. A. — c J Sawin, P. B. — c M Tisna-Amidjaja, D, A. — b J d Chimaera Baltzer, F. and Chen. P. S. — b J Romanovsky. A. — b J Mitchison. N. A. — a L Wolf. Et. C. — f L Wolff, Et. C. — f M e Merogony Astaurov, B. L. — b D Ortolani, Miss G. — a H 3 Analysis o[ influence o[ special genes and mutants a Special genes and mutants Okada, E.. Waddington. C. H. and Perry, Miss M. M. — - a Castiglioni, Miss M, C. — ^ c {2)D Chounick, A. — a D Chounick, A. — b (1)D Counce, Miss S. J. — a. b D Ede, D. A. — a D Fujii. S. — a D Kaji. S. — a D Kiihn, A. — b. c D Kuhn. A. — d (2)D Lobbecke. E.-A. — a, b D Nef, W. and Rosin, S. — a D Poulson. D. F. — c, d D Waddington. C. H. — b D Wolsky. A. — a D Hishida, T., Yamamoto, T. and Tomita, H. — b I Kajishima. T. — a I Rostand, J. — b J Hollander, W. F. — d L Kieny, Mrs M. A. — b L Landauer. W. — a, c L Loewenthal. Miss L. A. — a (2b)L Mintz. Miss B. — a L Zwilling, E. — c L Borghese, E. — a M Bryan, J. H. D. — c M IV. 3a Carter, T. C. — a, b M Caspari, E. W. — c M Clayton — Freedman, MrsR. M. — b M Griineberg, H. — a M Hollander, W. F. — a, c M Hummel, Miss K. P. — a, b M Jost, A. D. — c M Lyon, Miss M. F. — a, b, c M Markert, C. L. — a M McNutt, C W. — a,b M Sawin, P. B. — b M Stein, Miss K. F. — a M Stein, Miss K. F. — b (2b)M Stevens, L. — b M Truslove, Miss G. M. — a M Wolsky, A. — a M b Lethal factors Benz. G. A. — a Chounick, A. — b Ede, D. A. — a Shiomi, T. — a Baltzer, F. — a Moore, Mrs B. Clark — a Hollander, W. F. — a, b Hummel, Miss K. P. — a 4 Phenocopies Kuhn, A. — c Wolsky, A. — a Landauer, W. — d Runner, M. N. — c Walker, B. E. — b Wolsky, A. — a V. 2a (2a)D (1)D D D G 1)J M M D D L (DM M M V. DEVELOPMENT AND PATHOLOGY SUBDIVISION 1 Theoretical problems and general questions 2 General investigations in pathological development a General subjects b Relation between host and graft c Pathological influence of chemical treatment and deficiencies d Pathological influence of physical treatment e Teratology 3 Development of special malformations and pathological development of special organs a Development of special malformations b Pathological development of special organs (Cf. general subdivision p. 153 — 155) 4 Tumours 1 Theoretical problems and general questions Clegg, E. J. — b M Runner, M.N. — d M 2 General investigations in pathological development a General subjects Fedoroff, S. — b Geigy-Heese, R. — c D Bretschneider, L. H. — a E Ashley. G. T. — a V Lutz, H. and Lutz-Ostertag, Mrs Y. — c I Brunst, V. V. — b J Liedke, Mrs K. Beyer — b J Rosenbaum, R. M. — a J Wurmbach, H. — b J Corliss, C. E. — c L Grabowski, C. T. — d L Lutz. H. — b L Lutz, H. and Lutz-Ostertag, Mrs Y. — e L Mintz, Miss B. — b L Robertson, G. G. — a L Wolff, Et. C — a L Wurmbach, H. — b L Bartelmez, G. W. — d M Dokter, H. J. — b M 187 V. 2a Giroud. A — b Grucnwald, P. — a, b, c Gyllcnstcn. L. J. W. — b Hunt. E. L. — b Katsh, S. — a Mintz. Miss B. — b Schroder, R. K. P. — a Wells. L. J. — b b Relation between host and graft Anton. H. J. — b J Bondi, C. — c J Nicholas. J. S. — h L Felts. W.J. L. — d M Huygnard. C. — b M Nicholas. J. S. — h M c Pathological influence of chemi- cal treatment and deficiencies M M M M M M M M V. 3« EV + V P Kuhn. O. — c Geilenkirchen. W. L. M. and Raven. Chr. P. — b E Cheney. R. H. — e G Harvey, Mrs E. Browne — g G Bondi. C. — d I Cheney, R. H. — f J Dollander. A. and Marconnet. R. — c Green. Mrs E. U. — a Raunich. L. — e J Singer. M. — a ] Bagiiisky, S. — b L Dokter. H. J. — a L Fowler, I. — c L Herrmann, H. and Konigsberg. MrsU. Rothfels — b L Landauer, W. — b L Watterson, R. L. — a, b, c L Corhss. C. E. — b M Eraser, F. C. — a M Giroud, A. — a M Lefebvrcs-Boisselot, Mrs J. — a M Martinet. Mrs M. — a. b M Menschik. Z. — a. b M Miller. J. R. — a M Walker. B. E. — b M Wilson. I. G. — a M d Pathological influence of physical treatment Kirrmann. J. M. — a 188 Astaurov, B. L. — c Hanson, E. D. — a Astaurov, B. L. — c, d Bednjakova. Mrs T. A. — a Brunold, Miss E. — a Tahmisian, T. N. — a, b, c Timmermans, C. J. — a Ulrich. H. — a Verejskaja, Miss V. N. — a Cheney, R. H. — e O'Brien, J. P. — d Welander, A. D. — a Borden, J. van der and Trampusch, H. A. L. — a Luther, W. — b O'Brien, J. P. — a, c Peters, Th. — a Reyss-Brion, Mrs M. — a Stinson, B. D. — c Thomason, Miss D. — a Trampusch, H. A. L. — a Barbieri, F. D. — a Mintz, Miss B. — a Reyss-Brion, Mrs M. — a Borden, J. van der and Trampusch, H. A. L. — a Bryan. J. H. D. — b, c Chang, M. C. — f Chase, H. B. — c Hicks, S. P. — a Hintzsche, E. — c Hollander. W. F. — b, c Luther, W. — b Mintz, Miss B. — a O'Brien, J. P. — c Rugh, R. — c c Teratology Krause, G. — a Moore, A. R. — c Pflugfelder, O. — b Baginski. S. — a Pflugfelder. O. — b Wolff, Et. C — a Giroud, A. — c Shaner, R. F. — b 3 Development o[ special mal- formations and pathological development o[ special or- gans A V. 3a V. 4 a Development of special malfor- mations Witschi, E. — b V Rostand, J. — b J Landauer, W, — c L Watterson, R. L. — g L Adams, Miss E. C, McKay, D. G., Benirschke, K., Bardawil, W. and Hertig, A. T. — c Chase, H. B. — a Eraser, F. C. — b Jost, A. D. — c Lefebvres-Boisselot, Mrs J. — Settle, G. W. — a Singer, R. — b, c Walker, B. E. — b b Pathological development of special organs Skin Raynaud, A. — b, c M Nervous system Olsson, R. — b H Olsson, R. — b V Watterson, R. L. — a, b L Watterson, R. L. — g L Bailey, J. C. — a,b M Delmas, A. — b M Eayrs, J. T. — a M Faassen, F. van, Stam, F. and Scholten, F. C. — a M Giroud, A. — d M Huber. W. — a M Lefebvres-Boisselot. Mrs J. — b M Murakami, U. — a M Ramirez de Arellano, Miss M. I. R. and Ranck, J. — a M Sinclair, J. G. — b M Windle, W. F. — c M Special sense organs Castiglioni, Miss M. C. — b D Delmas, A. — b M Rugh, R. — c M Schlesinger, A. B. — c M Skeleton Takeuchi, K. — b I Sedra, S. N. — b J Watterson, R. L. — c L Felts, W.J. L. — c M Ford. E. H. R. — b M Muscular system Alimentary tract Foley, Mrs E. P. — a M Kleiss, E. — a M Respiratory organs Heart, vascular system and blood Dankmeijer, }. and Los, J. A. — a V Mitchison, N. A. — a L Rychter. Z. — b L Condorelli, M. — a M Dankmeijer, J., Snellen, H. A., Dekker, Miss A., and Ingen, Miss H. C. van — d M Reis, R. H. — a, b M Shaner, R. F. — a, c M Sinclair, J. G. — b M Stephan, Fr. — b L Coelomic cavities and endothelia. lymphatic system and connective tissue Mitchison, N. A. — a L Menschik, Z. — b M Urogenital system and sexual differentiation Bielariska-Osuchowska, Mrs Z. — c M Boyer. C. C. — b M Roux, C. — a M Stevens, L. — a M 4 Tumours Gonzalez-Ramirez, J. — a Vanderhaege-Hougardy, Mrs F. — a Wolff, Mrs Em. and Wolff, Et. C. — c Barigozzi, C. — a Castiglioni, Miss M. C. — a Hartung, E. W. — a Curtis, A. S. G. — a Holtfreter, }. K. F. — b Kawakami, I. — d Leone, V. — a Norman, C. — a O'Brien, J. P. — b Saxen, L. O. and Toivonen, S. I. — a Spirito, A. — a 189 VI. 3a ^.ur.ny ii. T. — a. C Curtis. A. S. G. — a Frascr. R. C — d Ko€ckc. H.-U— a O Connor. R. J. — b Saunders. J. W. — g J Hcim. W. G. — a L Kawakami, I. — d L Koecke. H.-U. — a L Makino. S. — a, b L O'Connor, R. J. — b L Saunders, J. W. — g VI. REGENERATION SUBDIVISION ; Theoretical problems and general questions 2 General ini'cstigations, including total regeneration 3 Partial regeneration a General subjects b Tail regeneration c Limb regeneration d Regeneration of special organ systems (Cf. general subdivision p. 153 — 155) CHARACTER OF INVESTIGATION (4) Physical treatment (5) Chemical treatment (6) Infuence of hormones and vitamins ; Theoretical problems and general questions Polezhayev, L. V. — b J 2 General investigations, including total regeneration Kuhn, C — d Faure-Fremiet, E. and Hamard, Miss M. — a P Mookerjee, S., Ganguly, B. and Chowdhury, M. — c A Mookerjee, S., Sanyal, S., Nagarajan, S. N. and Sinha. A. — b B Nagarajan. S. N. — a B Stagni. Miss A. M. — a B Bondi, C. — a C Brondsted, H. V. — a C Butros, ). M. — b C Ghirardelli, E. — c C Grcca, M. La — b C Hubl, H. — a.b C Kanatani, H. — a C Kawakami, Mrs K. I. — a C Kido. T. — a C M M M M M M Moment, G. B. — a, c Needham, A. E. — a Pedersen, K. J. — a Ranzoli, F. — c Sprattjr, N. T. — c Stephan-Dubois, Mrs Fr. — a Sugino, H. — a Wolff. Et. C. — c Kiihn, A. — a Schneider, D. — c Butler, E. G. — b Brunst, V. v. — c Coninck, L. A. P. De — a Jochems, D. J. and Trampusch, H. A. L. — a Polezhayev, L. V. — b Woerdeman, M. W. — c Woerdeman, M. W. — c Jochems, D. J. and Trampusch, H. A. L. — a 3 Partial regeneration a General subjects Morgan, Miss J. A., Stock, A. and O'Farrell, A. F. — a (6)D 190 VI. 3a Voy, A. — a D Wolsky, A. — c D Kawakami, Mrs K. I. — c, d E Nowakowna, Miss J. — a (6)V Radecka, Mrs E. Erdman — a (6) V Sembrat. K. — c (6)V Wurmbach, H. — a (6)V Anton, H. J. — a Benz. G. A. — b Bieber. S. — a Dent. J. N. — b Jurand, A. — a (5) Kielbowna, Miss L. — a (6) Kiortsis, V. — c Lehmann, F. E. — d Liotti, F. S. — b Luther, W. — b (4) Newth, D. R. — a Rieck, A. F. — a (6) Singer, M. — b, c Stefanelli, A. — e Stinson, B. D. — b Wolff, Et. C. — c Wolsky, A. — c Stefanelli, A. — e L Johnson, F. R. — ^b M Luther. W. — b (4)M McMinn. R. M. H. — a M Mintz. Miss B. — a M b Tail regeneration Kiortsis, V. — b, c J Lehmann, F, E. — b (5)J Raunich, L. — b (5)J c Limb regeneration Goss, R. J. — a 1 Bodemer, C. W. — b J Butler, E. G. — a J Butler, E. G. — c (4)J Deck, J. D. — a. b, c J Faber, J. — a J Eraser, R. C. — c J Gitlin, G. — b J Glade. R. W. — a J Goss, R. J. — c J Kiortsis, V. — a J Lahaye, Mrs J. — a I Luther, W. — a J Mettetal, C. — a J Rieck, A. F. — b J Rieck, A. F. — c (4)J VL 3d (5)J J (4/6)J (4)J J J Singer, M. — a Singer, M. — b, c Stinson, B. D. — a Thornton, C. S. — a Thornton, C. S. — b Trampusch, H. A. L. — Yntema, C. L. — b J d Regeneration of special organ systems Naylor, E. — a C Pohley, H.-J. — a,b D Skin Luther, W. — a J Lender, Th. — b C Nervous system Bodenstein, D. — a D Olsson, R. — b H Olsson, R. — b V Stefanelli, A. — b V Kollros, J. J. — c. e J Leghissa, S. and Pasquini, P. — a (5)J Romanovsky, A. — a J Menkes, B. — b L Polezhayev, L. V. — c M Windle, W. F. — a M Special sense organs Lender, Th. — a C Eguchi, G. — a Frost, D. — a Lopashov, G. V. — c Mazzoni-De Cesare, Mrs. L and Pasquini, P. — a Mina, E. Y. — b Reyer, R. W. — b Reyer, R. W. and Stone, L. S. — a Sembrat, K. — d Sembratowa-Opoczynska, Mrs Z. — a Steinitz, H. — a, b, c Stone, L. S. — a, b, c Stroeva, Miss O. G. — a Stroeva, Miss O. G. — c (5) Sangvichien, S. — a K Amprino, R. M. — c L Doorenmaalen, W. J. van — b L Woerdeman, M, W. ^ — a L Stroeva, Miss O. G. — a M 191 VI. 3d VII. 3b Goss, R. J. — b Polezhayev. L. V. — a Woerdcman. M. W. — a I M M Muscular system Alimentary tract O'Connor, R. J. — a Wilson. J. W. — a M M Respiratory organs Heart, vascular system and blood Coelomic cavities and endothelia, lymphatic system and connective tissue Urogenital system Follenius, E. and J. H. Vivien — a Endocrine glands Heckerman. R. O. — b VII. METAMORPHOSIS SUBDIVISION 7 Theoretical problems and general questions 2 General investigations a General subjects b Hormones and metamorphosis c Metamorphosis of part of the organism d Metamorphosis of special organ systems (Cf. general subdivision p. 153 — 155) CHARACTER OF INVESTIGATION (5) Chemical treatment 1 Theoretical problems and general questions 2 General investigations a General subjects Knight-Jones, E. W. — a Bookhout. C. G. — b Costlow, J. D. — a Gloor, H. J. — a Ito, T. — a, c Pohley, H.-J. — a. b Rockstein, M. — a, b Thompson, T. E. — b Harvey, Mrs E. Browne — c Okazaki, Miss K. — c Brewin, B. I. — a Baxter, E. W. — a Castigli-Pitotti, Mrs M. — b Dent, J. N. — c Jurand, A. — b Kaltenbach, Mrs J. C. — c 192 Leghissa, S. and Pasquini, P. — a (5) J Niizima, M. — b J Stuchly, Z. — a J Yanagisawa, T. — ^a J b Hormones and metamorphosis c Bodenstein, D. — d D D Geigy-Heese, R. — a D D Highnam, K. C — a D D Ichikawa, M. and D Nishiitsutsuji-Uwo, Mrs. J. — a D D Luscher. M. — b D D Rae-Wickham, Mrs C. A. — a D E Nowakowna, Miss J. — a V G Radecka, Mrs E. Erdman — a V G Sembrat, K. — c V H Wurmbach, H. — a V I Eraser, R. C. — b J J Iwasawa, H, — a J J Kaltenbach, Mrs J. C. — b J J KoUros. J. J. — b.f J J Lynn, W. G. — a J VII. 3b Saxen, L. O. and Toivonen, S. I. — b J c Metamorphosis of part of the organism Lobbecke, E.-A. — a, b D Schoeller, Miss J. — b D d Metamorphosis of special organ systems Skin Andres, G. — b J Nervous system Niiesch, H. — c D Special sense organs Steinitz, H. — c J Takisawa, A. — b J Wilt, F. H. — a J Witschi, E. — e J Takisawa, A. — b M VII. 3d Skeleton Muscular system Niiesch, H. — b D Takisawa, A. — a J Alimentary tract Harder, W. — a I Respiratory organs Heart, vascular system and blood Coelomic cavities and endothelia, lymphatic system and connective tissue Stuchly, Z. — a J Urogenital system Cambar, R. — c J Lynn, W. G. — b J Endocrine glands 193 NEW TECHNICAL METHODS in Developmental Biology (arrantfrd accordinif to anbjectt) This chapter contains data on methods pubhshed during the two-year period elapsed between the appearance of the previous and of the present full issue. CLASSIFICATION OF SUBJECTS I/II Descriptive and experimental embryology III Physiology of development IV Development and genetics V Development and pathology VI Regeneration a microscopy, photography and reconstruction b histology and cytology c operation and marking d culturing (of organisms, organs, tissues and cells) c physiology f histochemistry and cytochemistry g biochemistry h biophysics Descriptive and Experimental Embryology Microscopy, photography and reconstruction 1. The use of plastic in reconstruction from serial sections. UV. photography of the reconstructions. (General) Boyer. C. C. — Anat. Rec, 125, 433-442. 1956 2. Measurement of nuclear and cytoplasmic volumes. (General) Dick. D. A. T. — Nature. 177, 236-237, 1956 3. Study of cell division by phase microscopy, (General) Makino, S. & H. Nakahara — J. Heredity, 46, 5, 145-251 4. Phase contrast microscopy of developing eggs. (Echinoidea) Holter, H. 6 E. Zeuthen — Pubbl. Staz. Zool. Napoli, 29, 285-306. 1957 5. Fluorescence microscopy of germ cells. (Mammalia) Bishop. M. W. H. 6 }. Smiles — Nature. 179, 307-308, 1957 Histology and cytology 6. A quick cytological method for mounting embryos of some species. Geyer-Duszynska, I. — Zoologica Poloniae, 7, 1956 (Diptera) 7. Microtomie dotterreicher Eier. (Insecta) Krause. G. 6 J. Krause — Zool. Jb. (Anat.), 75, 481-550, 1957 194 8. Intravital staining of parts of the Amnion's formation by injection of dithizon. (Mammalia) Fleischhauer, K. & E. Horstmann — Z. f. Zcllforsch.. 1957 Operation and marking 9. U.V.-Strahlenstichmethode. (General) Seidel. F. — Zool Anz., Suppl. 19, 371-380, 1956 10. Insertion of transplants into the mesenchyme beneath the epithelium. Kido, T. — Sci. Rep. Kanazawa Univ.. 5, I, 1957 ( Turbellada) 11. A method for the destruction in situ of larval gonads. (Insecta) Pantelouris, E. M. & D. Poggendorf — Experientia, 11, 38, 1955 12. Use of the Mitchison-Swann elastimeter as an aid in micromanipulation. Tyler, A. — Biol. Bull., 109. 369-370. 1955 (Echinodetmata) 13. Infusion of microquantities of chemicals in solution into the embryo and the regenerate. (Amphibia) Singer. M., D. Flinker & R. L. Sidman — J. Exp. Zool., 131, 267-300, 1956 14. Tracing of morphogenetic movements by means of labelled cells. (Am- Sirlin. J. L. — Roux'Archiv, 148, 489-493. 1956 phibia, Aves) 15. An improved method of operating on early blastoderms in ovo. (Aves) Grabowski. C. T. — J. Exp. Zool.. 133. 301-344, 1956 16. Nouvelle technique de transplantation: la greffe intra-oculaire; application a I'epiphyse. (Aves) May, R. M. 6 M. S. Thillard — C. R. Acad. Sci.. 244. 1553-1555. 1957 17. Isolation of melanocytes free of other cell types; use for grafting (seeding) or tissue culturing. (Aves) Reams, W. M.. Jr. — J. Morphol., 99, 3, 513-548, 1956 18. A method for experimental closure of extraembryonic vessels. (Aves) Rychter, Z. & L. Lemez — Cs. morfologie, 4, X'^lASl, 1956 19. Labelling of early eggs for transplantation. (Mammalia) Edwards, R. G. 6 J. L. Sirlin — Proc. Sec. World Congr. Pert. Ster.. 1957 20. Ionizing radiation as an extirpative tool in experimental embryology. (Mammalia) Hicks. S. P.. B. L. Brown & C. J. D.'Amato — Am. J. Pathol., 33, 459-481. 1957 21. Labelling of sperm. (Mammalia) Sirlin. J. L. & R. G. Edwards — Exp. Cell Res., % 596-599, 1955 22. Operative Entnahme und in vitro Zucht einzelner Keime. (Mammalia) Wrba, H. — Verh. Deutsch. Ges. Pathol., 39 Tgg., 345-349. 1955 195 Culturing (of organisms, organs, tissues and cells) 23. Methods for obtaining and handling marine eggs and embryos of about 90 species. (All Classes from Porifeta to Teleostei) Costello, D. P.. M. E. Davidson, A. Eggers, H. M. Fox and C. Henley — Pubhshed by Marine Biological Laboratory. Woods Hole, Mass., U.S.A., Nov. or Dec, 1957 24. Confinement of a single larva in a micro-aquarium. (Marine eggs) Dan, K. & K. Okazaki — Biol. Bull., 110, 29-42, 1956 25. Induction of division and growth synchrony in axenic cultures. Tetra- hymena pyriformis (Holotricha, Ciliata) Scherbaum. O. & E. Zeuthen — Exp. Cell Res., Suppl. 3, 312-325, 1955 26. Larval development in the laboratory. Balanus eburneus (Cirripedia) Costlow. J. D., Jr. & C. G. Bookhout — Biol. Bull., 112, 3, 313-324 27. Culture of tissue fragments in fluid culture. (Vertebrata) Moog. F. & M. H. Kirsch — Nature, 175, 722, 1955 28. In vitro culture of larval tissues. (Amphibia) Niizima, M. — Okaj. Folia Anat. Jap., 28, 59-69, 1956 29. In vitro cultivation of embryonic spinal ganglia. (Aves) Peterson, E. R. — Am. J. Anat., 96, 319-356, 1955 30. Technique de culture in vitro de blastodermes entiers. (Aves) Simon, D. — Arch. Anat. Microsc, 1956 5ee also entries no. 17, 22 Physiology of Development Microscopy, photography and reconstruction See entry no. 5 Physiology 31. A method for determination of the average life span of primitive erythro- cytes (EI). (Vertebrata) Lemez, L. — Cs. morfologie. 5, 201-208, 1957 32. Applikation von Steroidhormonen mit Hilfe eines Losungsvermittlers. Querner, H. — Biol. Zentr. bl., 75, 28-51, 1956 (Pisces) 33. Direct and indirect calorimetry of the embryo. (Aves) Romijn, C. — Poultry Sci., 1957 34. A micromethod for determination of the circulating blood volume. (Aves) Rychter, Z., M. Kopecky & L. Lemez — Nature. 175, 1126-1127. 1955 5ee also entries no. 13, 25 196 Histochemistry and cytochemistry 35. Differential staining with a mixture of safranin and fast green F.C.F. (qualitative staining of nucleic acids and proteins). (General) Bryan. J. H. D. — Stain Technol., 30, 153-157, 1955 36. Estimation and localization of antigens by means of autoradiography fol- lowing the treatment of sections by radio-iodinated antisera. (General) Clayton, R. M. & M. Feldman — Experientia, 11, 1, 29, 1955 37. Histo-serological reaction. (General) Doorenmalen, W. J. van — Thesis, 80 pp., Amsterdam, 1957 38. Modifications of Gomori's techniques for acid and alcaline phosphatase reactions applicable to young stages of development. (Evertebrata, Mammalia) Mulnard, J. — Arch, de Biol., 64, 525-685, 1955 39. Method for obtaining efficient incorporation of radiosotopes into eggs. Nakano, E. & A. Monroy — Experientia, 1957 (Echinodermata) See also entry no. 8 Biochemistry 40. Determination of protein changes by "salting out" method. (General) Ranzi, S. & P. Citterio — Exper. Cell Res., Suppl. 3, 287-293. 1955 41. Cell-diffusion analyses of immobilization antigens. (General) Finger. I. — Biol. Bull., Ill, 358-363, 1956 42. Use of 1131 and filter paper chromatography for the study of development of the thyroid in vitro. (General) Gonzales, F. — Exp. Cell Res., 10, 181-187, 1956 43. Elimination and correction methods for contaminant in eggs which inter- feres with the diphenylamine reaction for DNA. (Amphibia) Finamore. F. J. — Exp. Cell Res., 12, 356-362, 1957 See also entry no. 13 Biophysics 44. A method for investigating electrical properties of egg cells. (Echinoder- mata) Tyler, A., A. Monroy, C. Y. Kao & H. Grundfest — Biol. Bull., Ill, 153-177. 1956 45. Rontgen-Teilbestrahlung von Zellplasma. (Utodela) Peters, Th. — Naturwiss., 44, 9, 1957 5ee also entry no. 33 197 Development and Genetics Operation and marking See entries no. 19. 21 Biophysics 46. A method for inducing complete heterospermic androgenesis by heat treatment alone or combined with heavy X-raying of female sex cells. (Lepi' d opt era) Astaurov, B. L. & V. P. Ostrjakova-Varshaver — Izvestija Akad. Nauk SSSR, Ser. Biol., 2, 154-175, 1957 Development and Pathology Operation and marking 5ee entries no. 9, 13, 20 Physiology See entry no. 13 Biochemistry See entry no. 13 Biophysics 47. Abnormal embryonic development induced by treatment with ultrasonic waves. (Insects) Selman, G. G. & S. J. Counce — J. Embryol. Exp. Morphol., 3, 121-141, 1955 5ee also entry no. 45 Regeneration Operation and marking 5ee entries no. 9. 10, 13 Physiology 5ee entry no. 13 Biochemistry See entry no. 13 198 ..SUPPLY AND DEMAND" SERVICE for Laboratory Animals It was decided henceforth to omit the information concerning birds and mammals. This decision is due to the fact that an "International Committee on Laboratory Animals" has been estabhshed, under the sponsorship of Unesco. This Committee will, for the time being, be primarily concerned with the supply of birds and mammals. Informations concerning the programme developed by this Committee may be obtained from its Honorary Executive Secretary, Dr. W. Lane-Petter, Director of the Laboratory Animals Bureau, Medical Research Council Laboratories, Holly Hill, Hampstead, London, N.W. 3, England. Transactions should be carried out directly between the interested parties. We do not take any responsibilities either for the transactions themselves, or in matters relating to prices, in- and export regulations, animal protection regulations etc. With each new list all previous hsts become invalid. A. LIST OF SPECIES AVAILABLE with numbers referring to List B. Unless otherwise indicated, most items available throughout the year. GENERAL Australian spp. 43^) Marine animals (Gulf of Naples) 49 VERMES Euplanaria polychroa (cloned) 46 Planaria vitta (cloned) 46 ARTHROPODA Insecta Aedes spp. 54 Anopheles spp. 54 Bombyx mori 41 Culex spp. 54 Dictyoptera (various spp.) 43 Drosophila hydei 52 Drosophila melanogaster 52 Drosophila simulans 52 Ephestia Kiihniella (inbred strains, mutants a, va, Rt, rt) 6 Habrobracon juglandis (= Mi- crobracon hebetor, wild stock no. 33) 26 Ornithodoros moubata (Argasi- dae; Tanganyika) 54 Rhodnius spec. (Reduviidae) 54 Triatoma spec. (Reduviidae) 54 Xenopsylla cheopis (Pulicidae) 54 Zaprionus ghesquierei 52 MOLLUSCA Campeloma spec. 33 Goniobasis spec. 33 Physa spec. 33 Planorbis spec. 33 Watasenia scintillans (females with ripe eggs, May-July) 42 ECHINODERMATA Lytechinus variegatus (not in June, July, Aug.) 7 Mellita quinquiesperforata (not in June, July, Aug.) 7 PISCES Gasterosteus spec. 33 Salmo fario (ova) 4 Umbra limi 33 ^) on special request. 199 AMPHIBIA Urodela Ambystoma maculatum 33 Ambystoma mexicanum (young animals) 37'-) Ambystoma mexicanum 45-^), 48-<) Ambystoma opacum 33 Ambystoma punctatum (Apr.-May) 29^) Ambystoma tigrinum 33 Hynobius nebulosus 40«) Hynobius retardatus (March-May) 39 Molge boscai 53 ^ological Collectors, etc. 201 15.* CHASE WILD ANIMAL FARM. Lawson Road, EGYPT, Mass. 16.* SUPPLY DEPT, Marine Biol. Lab., WOODS HOLE, Mass. 17.* TRANS-MISSISSIPPI BIOLOGICAL SUPPLY. 892 West County Road B., ST PAUL, Minn. 18.* CAROLINA BIOL. SUPPLY CO.. ELON COLLEGE, N.C. 19.* J. C. NICHOLLS, Jr., Zoological Collector, MURPHY, N.C. 20.* CHAMPLAIN BIOLOGICAL SERVICE, GLEN GARDNER. N.J. 21.* E. R. NEUENFELDT, P.O. Box 29, CHAMPLAIN, N.Y. 22.* STANDARD SCIENTIFIC SUPPLY CO.. 34-38 West 4th Street. NEW YORK CITY. N.Y. 23.* WARDS NATURAL SCIENCE ESTABL., 3000 Ridge Road East. ROCHESTER, N.Y. 24.* MRS. R. C. CASSELBERRY. 55 Edgemont Road. SCARSDALE, N.Y. 25.* PORTLAND BIOLOGICAL SUPPLY CO., P.O. Box 6671 Lents Sta- tion, PORTLAND 66. Ore. 26. BIOLOGY DEPT. Susquehanna University, SELINSGROVE. Pa. 27.* SOUTHWESTERN BIOLOGICAL SUPPLY CO.. P.O. Box 4084, St. A., DALLAS. Tex. 28.* EARLE JARVIS, Zoological Collector. ALBURG, Vt. 29. COLLEGE OF MEDICINE. University of Vermont, BURLINGTON. Vt. 30.* VIRGINIA BIOLOGICAL SUPPLY, CHARLOTTESVILLE. Va. 31.* NORTHWESTERN BIOL. SUPPLY CO., Route 3, ANACORTES. Wash. 32.* COLLEGE BIOLOGICAL SUPPLY CO., 9230 Woodlawn Ave. SEATTLE. Wash. 33.* THE LEMBERGER CO.. P.O. Box 482. OSHKOSH. Wis. 34.* E. G. STEINHILBER & CO., OSHKOSH, Wis. ASIA India 35.* VITA LIMITED. 31 Ropewalk Street. Fort. BOMBAY 36.* BIOLOGICAL SUPPLY CONCERN. 14 Hare Street, CALCUTTA 1 Israel 37. DEPT OF ZOOLOGY, Hebrew University, JERUSALEM Japan 38. BIOLOGICAL INSTITUTE, Fac. of Sci.. Niigata University. NII- GATA 39. DEPT OF ZOOLOGY, Fac. of Sci., Hokkaido University, SAPPORO 40. DEPT OF ANATOMY, Tokyo Med. and Dent. University, Yushima 3, Hongo, TOKYO 202 41. SERICULTURAL EXPERIMENT STATION, Koenji. Suginami-ku. TOKYO 42. BIOLOGICAL INSTITUTE. Fac. of Liberal Arts. Toyama University. Hasumachi 22, TOYAMA AUSTRALIA Australia 43. DEPT OF ZOOLOGY, New England University. ARMIDALE, N.S.W. EUROPE Belgium 44.* REPTILAMPHIBIA (Felix Vandevelde), Remerstraat. BAAL, Brabant Czechoslovakia 45. ZOOLOGICAL INSTITUTE. Charles University, Vinicna 7. PRAHA II Denmark 46. INSTITUTE F. ALM. ZOOL., Universitetspark 3, COPENHAGEN 0 Germany 47. ZOOLOGISCHES INSTITUT der Universitat Koln, Kerpenerstr. 13, KOLN-LINDENTHAL Hungary 48. DEPT OF ANATOMY, University Medical School, Dischka u. 5. PECS italy 49.* STAZIONE ZOOLOGICA. Villa Comunale, NAPOLI (101) 50. ISTITUTO DI ZOOLOGIA, Via Archirafi 18, PALERMO 51. ISTITUTO DI ZOOLOGIA E ANAT. COMP., Universita di Pisa. Via A. Volta 4. PISA Netherlands 52. GENETISCH INSTITUUT der Rijksuniversiteit, 5e Binnenvestgracht 8, LEIDEN Spain 53.* HERMANN GRuN, Linares de Riofrio. SALAMANCA Switscrland 54. SCHWEIZ. TROPENINSTITUT, Socinstrasse 51, BASEL United Kingdom 55. MEDICAL SCHOOL, Charing Cross Hospital, Chandos Place, LON- DON W.C. 2. 203 Communications Ironi the Hubreciil Laboratory I The Laboratory In the year 1958 (March 15th — September 15th) the third international team work on embryology will be held at the Hubrecht Laboratory under the joint direction of Prof. Dr Chr. P. Raven of the University of Utrecht, and of Dr P. D. Nieuwkoop, Director of the Laboratory. The topic for the third team will be: "A morphological and physiological analysis of regulative and non-regulative processes in the development of "mosaic" eggs of several terrestrial and freshwater invertebrates" . As far as is known at the present moment, the following scientists will parti- cipate in this team (alphnhctical order): Miss A. Andrew, M.Sc. Johannesburg, South Africa Dr J. C. George. Baroda. India Dr C. Jura, Krakow, Poland Dr J. B. Morrill, Tallahassee. Flor.. U.S.A. Dr I. Nakamura, Tokyo, Japan Mr E. Suminsky, M.V.Sc, Warszawa, Poland Dr G. Szekely, Pecs, Hungary Dr S. Seo, Fukuoka, Japan II The Central Embryological Library (C.E.L.) A Extension of reprint collection Recently a programme of collaboration has been established with the Ex- cerpta Medica Foundation. Amsterdam, which will enable us to have regular access to the most recent literature received by this Foundation. This means, firstly, that the reprint collection will be more complete, and secondly, that in many cases it will be possible to acquire reprints at a much earlier date than has been the case until now. B Services rendered by the C.E.L.; conditions for borrowing 1 . Every erabryologist can ask for information about literature of certain authors, for surveys of literature on certain subjects (according to the classification-system of the G.E.I.S.), for surveys of newly published literature, etc. 2. Every embryologist can borrow reprints which are not available in his own country. Books and Normal tables are usually not lent out, volumes of periodicals are only lent out to investigators in the Nether- lands. Conditions: a. Reprints may be borrowed for 3 months at the utmost (for the Netherlands 1 month), time for shipment not included. b. The receipt added to the consignment must be returned by return of post, after having been controlled and signed. c. In case of high forwarding charges these have to be partly carried by the applicant. 3. Every embryologist can personally consult the C.E.L. at all times. 4. The C.E.L. will be at the disposal of every embryologist working at the Hubrecht Laboratory. 204 III The Central Embryological Collection of slides and material A Housing of the Collection The entire Collection has been moved to a large underground strong-room in the new administration building of the University of Utrecht (formerly a Bank building). This means, firstly, that the Collection is now housed as safely as possible, and secondly, that the space formerly occupied by it in the Hubrecht Laboratory can now be used for other urgent purposes. B Conditions for borrowing Conditions: 1. Slides, material in paraffin and/or material in alcohol can only be bor- rowed for one year, after which it has to be returned automatically if no special request for extension of the loan has been made by the investigator and has been approved by the staff of the Hubrecht Labor- atory. 2. Material in alcohol or paraffin has to be returned as such or in the form of well prepared slides which have been sectioned, stained and embedded properly, clearly labeled (name of species, thickness and direction of sectioning, method of staining, etc.) and numbered according to given indications. 3. Costs of transport may be charged if these exceed reasonable limits. 4. Two copies of those publications dealing with material from the Central Embryological Collection should be sent to the Central Embryological Library of the Hubrecht Laboratory. 5. If material of the Central Embryological Collection has been used in investigations, it is respectfully requested that this be indicated in the publications concerned. Restrictions: 6. Very rare or regularly consulted material can only be studied at the Hubrecht Laboratory. 7. Material of great historical value cannot be lent out. 8. If material has not been treated properly or (after special request) has not been returned in time by an investigator, material will no longer be lent out to the person in question. IV Photographic Reproduction Service The Hubrecht Laboratory makes photostats on request of papers present in the Central Embryological Library or borrowed from elsewhere. The negatives will remain at the Laboratory. Price list (both text and plates): Positive microfilm (24 X 36 mm): p.p. / 0.25 = $0.07 Enlarged prints 7 X 10 cm (box camera size): p.p. / 0.40 = $ 0.10 13 X 18 cm (average page size): p.p. / 0.50 = $ 0.13 18 X 24 cm (large page size): p.p. / 0.65 = $0.17 205 Communications of the ..Institiit International dhnibryologie** (Eiiil>ryological Section ol tlic i.l .h.S ) The I. I.E. has to announce with great regret the loss of its Honorary Presi- dent, Prof. Dr. J. Boeke. who died in September. 1956. and of its active fellows Prof. Dr. K. Henke. who died in September. 1956. and Prof. Dr. G. B. Wis- locki. who died in October, 1956. The I.I.E. held an extra General Assembly on September 4th. 1957 in St. Andrews. Scotland, at which meeting the following resolutions were passed: a) The meetings of the Sections of Cell Biology and Embryology of the I.U.B.S. will be coordinated in time and space. The meetings will be held in reasonable proximity, but not in the same place and without overlapping in time or subject. A coordination of subjects will also be aimed at with the Genetical Section. b) The cooperation between the I.I.E. and the Hubrecht Laboratory has been extensively discussed and the following statements have been made: 1 ) The administration of the I.I.E. will remain at the Hubrecht Laboratory. 2) The I.I.E. accepts an advisory- role with respect to the international admi- nistrative (General Embrs'ological Information Service etc.) and scientific acti\ities (Normal Table, international team work, etc.) of the Hubrecht Laborators-. The latter is however subsidized and directed by the Royal Dutch Academy of Sciences. 3) In order to make the advisory role of the I.I.E. as effective as possible. at least once a year an advisory committee, consisting of the president and secretary of the I.I.E. together with two other fellows, will visit the Hubrecht Laboratory- in order to discuss both forms of international activity. ■i) The General Assembly expressed its high appreciation as to the interna- tional team work project as an opportunity for young scientists to be trained in the methods of experimental embr\'ology. It funher declared that it is of great interest for the improvement of developmental biology that the Hubrecht Laboratorv' is ready at ever>' period to receive young and more advanced workers in the field of embryology and to supply them with living embryolo- gical material of various native and foreign animals. c) The president Prof. Dr. M. W. Woerdeman and the secretary Prof. Dr. Chr. P. Raven had expressed the wish to retire from the Board. Prof. Dr. A. M. Dalcq. replacing the president at this meeting, thanked both retiring func- tionaries for their important contributions to the development of the I.I.E. After election of new functionaries the composition of the Board for the next penod is as follows: President. Prof. Dr. A. M. Dalcq (member of the Board since 19-18) Secretarv-treasurer. Prof. Dr. F. E. Lehmann (since 1949) Vice President. Prof. Dr. P. A. Weiss (since 1949) Member. Dr. H. B. Fell (smce 1952) Prof. Dr. S. Horstadius (since 1956) Prof. Dr. Et. C. Wolff (since 1957) Prof. Dr. S. Ranzi (since 1957) Adftmct Secretary-treasurer. Dr. P. D. Nieuwkoop. 206 d) The invitation by Prof. Dr. S. Ranzi to hold the next General Assembly in Italy was accepted with thanks. The General Assembly will be held in 1960, preferably from September 6th or 7th in Milano or Pallanza, and will be combined with an Embryological Congress. Electionoffellowsandmembers The fellows W. Buno, F. de Castro and CI. Estable have been regarded as having resigned from fellowship. In order to fill up the open places in the college of fellows 8 persons have been elected as new fellows at a separate meeting. Thus the college of fellows has the following composition: (hst drawn up Dec. 1st, 1957, in alphabetical order and with year of (for full addresses see Alphabetical List in this periodical) election) M. Abercrombie, London. Eng. (1956) H. B. Adelmann. Ithaca. N.Y. (1948) P. A. Ancel. Paris (Emer.) (prior to 1933) B. L. Astaurov, Moscov/ (1956) M. Avel, Bordeaux (1948) B. I. Balinsky, Johannesburg (1948) F. Baltzer, Bern (Emer.) (1948) L. G. Barth. New York. N.Y. (1948) Sir G. R. de Beer, London, Eng. (1938) H. Bluntschh. Bern (Emer.) (prior to 1933) J. D. Boyd. Cambridge. Eng. (1957) J. Brachet. Bruxelles (1948) F. W. R. Brambell. Bangor, N. Wales (1956) P. L. Brien, Bruxelles (1948) A. J. P. van den Broek, Utrecht (Emer.) (1936) H. V. Br0ndsted, Kcbenhavn (1948) R. K. Burns. Baltimore, Md (1952) E. G. Butler, Princeton, N.J. (1956) E. van Campenhout, Louvain (1948) Chuang Hsiao-Hui, Shanghai (1948) G. W. Corner, Baltimore, Md (1952) D. P. Costello. Chapel Hill, N.C. (1948) G. Cotronei. Roma (Emer.) (1948) A. M. Dalcq. Bruxelles (1933) N. I. Dragomirov, Moscow (1948) R. M. Eakin, Berkeley. Calif. (1948) G. Fankhauser, Princeton, N.J. (1948) E. Faure Fremiet, Paris (Emer.) (1933) Miss H. B. Fell, Cambridge, Eng. (1936) T. Thomson Flynn, Jamaica (Emer.) (1938) L. Gallien, Paris (1956) P. Gerard, Bruxelles (Emer.) (1933) A. Giroud, Paris (1948) H. Gruneberg, London, Eng. (1956) E. Hadorn. Ziirich (1948) V. Hamburger. St. Louis, Mo (1948) W. J. Hamilton, London, Eng. (1948) R. G. Harrison. New Haven. Conn. (Emer.) (1912) Mrs E. B. Harvey, Princeton, N. J. (Emer.) (1948) Ch. H. Heuser, Augusta, Ga. (Emer.) (1948) L. Hoadley, Cambridge, Mass. (1948) J. K. F. Holtfreter. Rochester. N.Y. (1936) S. Horstadius, Uppsala (1948) R. R. Humphrey, Buffalo. N.Y. (1949) A. Kiihn. Tubingen (Emer.) (1957) W. Landauer, Storrs, Conn. (1957) F. E. Lehmann, Bern (1948) G. L. Levi, Torino (Emer.) (prior to 1933) 207 W. H. Lewis. Philadelphia. Pa (Emer.) (prior to 1933) P. E. Lindahl. Uppsala (1948) G. V. Lopashov. Moscow (1948) 0. Mangold, Heiligenberg (prior to 1933) A. Monroy, Palermo (1957) P. D. F. Murray, Sydney (1948) J. Needham, Cambridge, Eng. (1948) J. S. Nicholas, New Haven. Conn. (1948) P. D. Nieuwkoop. Utrecht (1957) Y. K. Okada. Tokyo (1952) S. Pai. Shanghai (1948) P. Pasquini. Bologna (1957) J. J. Pasteels, Bruxellcs (1938) L. V. Polezhayev. Moscow (1948) S. Ranzi. Milano (1948) Chr. P. Raven. Utrecht (1941) G. Reverberi, Palermo (1948) J. A. M. Runnstrom, Stockholm (1948) A. M. Schechtman, Los Angeles. Calif. (1948) D. Starck. Frankfurt a/M. (1952) At the General Assembly 54 new members have been elected. At present acceptance of their nomination has not yet been received from: G. Andres (Tubingen). W. E. Berg (Berkeley, Calif.). C. Y. Chang (Iowa City, Iowa), Mrs J. C. Dan (Tokyo), K. Dan (Tokyo). J. R. Gregg (New York). M. Hasek (Prague), I. Jit (Amritsar), I. Kawakami (Fukuoka). H. E. Lehman (Chapel Hill. N.C.). Miss B. Mintz (Chicago. 111.). A. Moscona (Jerusalem). 1. Motomura (Sendai). O. Nakamura (Osaka). E. Nakano (Nagoya), K. Okada (Tokushima), E. C. Sensenig (Birmingham, Ala), H. Sugino (Osaka), M. Sugiyama (Toba), G. Vandebroek (Louvain), A. H. Whitely (Seattle, Wash.) The following members have joined the I. I.E.: (list drawn up Dec. 1st, 1957, in alphabetical order and with year of (for full addresses see Alphabetical List in this periodical) election) A. Stefanelli. Roma (1952) L. S. Stone. Nev^ Haven. Conn. (1948) S. I. Toivonen, Helsinki (1948) G. Tondury, Zurich (1948) T. C. Tung. Tsingtao (1948) V. C. Twitty. Stanford. Calif. (1948) A. Tyler. Pasadena, Calif. (1948) L. von Ubisch, Paradis (Emer.) (1948) C. H. Waddington. Edinburgh (1948) A. Weber, Geneve (Emer.) (1933) P. A. Weiss. New York. N.Y. (1948) V. B. Wigglesworth. Cambridge. Eng. (1957) B. H. Willier. Baltimore. Md (1948) E. Witschi. Iowa City. Iowa (1948) M. W. Woerdeman. Amsterdam (prior to 1933) Et. C. Wolff. Paris (1948) T. Yamada, Nagoya (1957) C. L. Yntema. Syracuse, N.Y, (1948) R. D. Allen. Princeton. N.J. (1957) C. R. Austin. London. Eng. (1957) R. A. Beatty. Edinburgh (1956) M. Benazzi. Pisa (1956) H. Bergquist, Goteborg (1957) Miss J. H. Bijtel. Groningen (1956) D. Bodenstein, Maryland, Md (1956) E. J. Boell. New Haven. Conn. (1957) E. Borghese, Pa via (1956) 208 B. G. Boving, Baltimore. Md. (1957) R. W. Briggs. Philadelphia, Pa (1956) R. Cambar. Bordeaux (1957) G. ten Gate. Amsterdam (1956) Mrs M. Cigada. Milano (1957) J. Clavert. Strassbourg (1957) A. C. Clement, Atlanta, Ga (1957) A. L. Colwin. New York, N.Y. (1956) H. F. C Damas. Liege (1957) U. D'Ancona, Padova (1956) Mrs T. A. Dettlaff. Moscow (1956) Miss E. M. Deuchar, London. Eng. (1957) Ch. DeviUers, Paris (1957) J. D. Ebert, Baltimore, Md (1956) J. C. Fautrez. Gent (1957) M. Fischberg, Oxford, Eng. (1957) L. B. Flexner, Philadelphia. Pa (1956) Ch. L. Foote, Carbondale, 111. (1957) J. Gallera, Geneve (1957) C. Grobstein, Bethesda, Md (1956) T. Gustafson, Stockholm (1956) H. L. Hamilton, Ames. Iowa (1956) H. Holter, Kobenhavn (1957) D. Hooker, New Haven, Conn. (1956) J. M. T. Hultin, Stockholm (1956) Miss T. Humphrey, Pittsburgh, Pa (1956) A. D. Jost, Paris (1956) N. E. Kemp, Ann Arbor, Mich. (1957) J. J. Kollros, Iowa City, Iowa (1956) G. Krause, Tubingen (1956) Miss T. K. Kuusi, Helsinki (1956) J. Langman, Montreal (1956) V. Leone, Milano (1957) Mrs R. Levi-Montalcini, St. Louis, Mo (1956) H. Lutz, Clermont Ferrand (1957) C. L. Markert, Baltimore, Md (1957) C. B. Metz, Tallahassee. Fla (1956) A. Minganti, Palermo (1956) Miss F. Moog, St. Louis, Mo (1956) J. A. Moore, New York. N.Y. (1957) H. W. Mossman. Madison, Wis. (1956) J. Mulnard, Bruxelles (1957) D. R. Newth. London, Eng. (1957) M. C Niu, New York, N.Y. (1956) Miss J. M. Oppenheimer, Bryn Mawr. Pa (1956) F. Orts Llorca, Madrid (1956) T. Perri. Roma (1956) L. Raunich, Ferrara (1956) Miss M. E. Rawles, Baltimore, Md (1956) R. W. Reyer, Morgantown, W.Va (1956) S. M. Rose, Urbana. 111. (1956) Miss D. Rudnick, New H.iven. Conn. (1956) R. Rugh, New York. N.Y. (1956) T. Sato. Nagoya (1957) J. W. Saunders, Milwaukee, Wis. (1956) O. E. Schotte, Amherst, Mass. (1956) B. Schreiber, Parma (1956) S. J. Segal, New York, N.Y. (1957) A. Spirito. Perugia (1956) N. T. Spratt Jr.. Minneapohs, Minn. (1956) H. Takaya, Kobe (1957) A. C. Taylor, New York. N.Y. (1957) H. A. L. Trampusch, Amsterdam (1956) H. Tuchman-Duplessis, Paris (1956) E. Urbani, Roma (1956) E. Vannini, Modena (1956) A. J. Waterman. Williamstown, Mass. (1956) R. L. Watterson, Evanston, 111. (1956) C. E. Wilde, Philadelphia. Pa (1957) W. A. Wimsatt. Ithaca, N.Y, (1956) C. von Woellwarth, Hei\igenberg (1956) E. Zeuthen, Kobenhaven (1957) A. Zimmerman, Chicago. 111. (1956) E. Zwilling. Storrs, Conn. (1956) It seems desirable to give some information as to the procedure of the election of fellows and members. Proposal of candidates for fellowship can only be made by fellows. New fellows are elected by the college of fellows among persons of outstanding merit in the field of morphogenesis with a 2/3 majority 209 of votes of the present fellows and subsequent ratification by all fellows. The number of fellows is limited to 75. Candidates for membership are usually recommended to the Board by two fellows. The fellows should have previously convinced themselves that their candidates like to join the I. I.E. Candidates for membership can however just as well come forward directly or can be suggested by one of the members of the I. I.E. In that case the Board should however be requested to ask for recom- mendation among the fellows before or at the next General Assembly. After subsequent approval of the Board candidates for membership are elected by the General Assembly by majority of votes. In order to maintain certain standards it has been decided at the General Assembly in Providence in 1956 that candidates for membership should have been active in the field of morphogenesis for at least 10 years or, in case of a shorter period, should have made important contributions in this field. The Adjunct Secretary-treasurer, P. D. NIEUWKOOP 210 Announcements of recently published books on development and related subjects It has been decided to give these announcements a simpler form (cf. Intro- duction). Since they consequently no longer express personal opinions, they will henceforth bear no signature. Group A (books for instruction): BARBER, A. N., 1955 — "Embryology of the Human Eye" CHeVREMONT, M., 1957 — "Notions de Cytologic et Histologic" GIROUD, A. & LELIfiVRE, A., 1957 — "Elements d'embryologic" (4th revised edition) KOPSCH, Fr. (revised by KUESE, K. K.), 1957 — "Nomina Anatomica. Vergleichende llebersicht der Basler, Jenaer und Pariscr Nomenklatur" (5th edition ) McEWEN, R. S., 1957 — "Vertebrate Embryology" (4th edition) SACHWATKIN, A. A., 1956 — "Vergleichende Embryologie der niedcren Wirbellosen" (translated from the Russian edition, Moscow, 1949) SIRKS, M. J., 1956 — "General Genetics" (translated from the 5th Dutch edition) VERNE, J. (formerly Branca, A. & Verne, J.), 1956 — "Precis d'histologie" (4th edition) Group B (books for investigators): ABELOOS, M., 1956 — "Les metamorphoses" BEATTY, R. A., 1957 — "Parthenogenesis and polyploidy in mammalian development" CONGRESS REPORT, 1955 — "Le macromolecole dei viventi" FLEXNER, L. B. & VILLEE, C. A. (editors). 1954-1956 — "Gestation" HARTMANN, M., 1956 — "Die Sexuahtat" (2nd revised edition) HARVEY, Ethel Browne, 1956 — "The American Arbacia and other Sea Ur- chins" KOSTER, E., 1956 — "Experimentellc Zcllforschung, Hinwcisc auf ihre wich- tigsten Aufgaben" (3rd edition) SNELL, G. D. (editor). 1956 — "Biology of the laboratory mouse" SPECTOR, W. S. (editor), 1956 — "Handbook of Biological Data" TYLER, A., von BORSTEL, R. C. & METZ, C. B. (editors), 1957 — "The beginnings of embryonic development" WADDINGTON, C. H., 1957 — "The strategy of the genes" WARDLAW. C. W.. 1955 — "Embryogenesis in plants" WINDLE, W. F. (editor), 1957 — "New Research Techniques of Neuro- anatomy" 211 ■'EMBRYOLOGY OF THE HUMAN EYE " 1955 by Aelcta N. Barber The C.V. Mosby Co. 236 pp. with 193 figs St Louis This manual was designed primarily for students and practitioners of oph- thalmology. In order to keep the book within limits, the comparative embryo- logy of the eye as well as theoretical considerations have been omitted. There is no bibliography, and no reference to literature is made in the text. An effort has been made to emphasize the concomitant sequence and significance of the developmental events rather than to demarcate developmental stages sharply. Due attention is also given to abnormal development of the eye. The material is arranged in three sections, viz. Embryogenesis, Organo- genesis and Differentiation, each followed by a short summary. The book is concluded by what may be called a "normal table", in which the development of the individual structures is briefly indicated in relation to the crown-rump length of the embryo for successive 1 — 2 month periods of development. The book is illustrated with numerous beautiful photomicrographs and drawings, which are for the greater part original. Typography and appearance of the book are of a very high level. "NOTIONS DE CYTOLOGIE ET HISTOLOGIE" 1957 by M. Chevremont Editions Desocr 994 pp. with 636 figs Liege The basis for the present text-book was formed by the author's lecture- notes used in his instruction to medical and zoological students. It is meant for both biologists and medical scientists. More space than usual has been allotted to cytology, because of the recent rapid extension of this field as a result of the development of several new techniques. The book is concerned mainly with higher vertebrate material. Embryological information is used occasionally rather than systematically. Much attention is paid to the functional aspects of cells and tissues. The introductory chapter contains short surveys of the main technical methods, classical as well as modern, whereas the first chapter of the cytology section gives a comprehensive survey of cyto- and histochemical methods in use to-day. comprising 69 pages. Several of the chapters are followed by short lists of the most important recent literature. The numerous illustrations are beautifully reproduced. Particularly the cytology section is characterized by many striking photomicrographs, often grouped in series showing dynamic changes of cell-constituents. The book is well printed, but too large for easy use. The binding seems rather weak for a book of this size and weight. "ELEMENTS D'EMBRYOLOGIE' (4th revised edition) 1957 by A. Giroud and A. Lelievre Librairic E. le Frangois 335 pp. with 227 figs Paris The present concise manual of embryology has been written especially for 212 the use of medical students (both authors lecture at the Medical Faculty of Paris). It follows that the book deals mainly with human development, and that only essential points from comparative embryology are used where neces- sary for better understanding. The text has intentionally been kept as simple as possible, while many good diagrammatic and semi-diagrammatic drawings elucidate elementary relation- ships and processes. The fact that the book is meant exclusively for purposes of instruction is clearly reflected in the absence of any literature references and of an alphabetical index. A very useful feature for medical students is the inclusion of numerous data on developmental abnormalities, printed in different type, which greatly facilitates their localization. "NOMINA ANATOMICA, Vergleichende Uebersicht der Easier, Jenaer und Pariser Nomenklatur" 5th edition, 1957 by Fr. Kopsch Georg Thieme Verlag, Stuttgart (revised by K. K. Kuese) Price: D.M. 6.40 155 pp. Into this new edition of Kopsch' comparative list of anatomical names have been incorporated the names adopted at the 6th International Congress of Anatomy, held in Paris in 1955. "VERTEBRATE EMBRYOLOGY" 4th edition, 1957 by R. S. McEwen Henry Holt and Co., Inc. 701 pp. with 343 figs New York Price: $ 6.50 The first edition of this book appeared in 1923, the third edition in 1949. It was written primarily as an introductory text for general Zoology students. Since its first appearance the book has not been essentially modified. It is primarily descriptive, but also gives a certain amount of experimental results, including some of the most recent data. These serve to stimulate the student's interest, and to elucidate firmly established principles. The basis of the book is formed by moderately complete accounts of the development of the frog and the chick. These are supplemented by chapters presenting brief comparisons, in the first place with mammalian development (pig), but also with other significant vertebrate groups (Teleosts and Gym- nophiona). The book is opened by a chapter on germ cells, meiosis, and general features of fertilization and early development, followed by a des- cription of the early development of Amphioxus. The lists of literature references contain the most important older and recent literature, and thus point the way for further study. The illustrations are numerous, and particularly the line drawings are generally good. There is an extensive subject index. The book is well-printed, well-bound and of handy size. 213 "VERGLEICHENDE EMBRYOLOGIE DER NIEDEREN WIRBELLOSEN" 1956 by A. A. Sachwatkin V.E.B. Deutscher Verlag (translated from the Russian edition, der Wissenschaften, Berlin Moscow. 1949) Price: D.M. 29.20 401 pp. with 125 figs According to the introduction, this book is meant as a contribution to "evo- lutionary embryology", in other words to the problem of the historical origin of multicellularity and ontogenesis in Metazoa. It is at the same time meant to be a contribution to a revival of the "materialistic tradition of classical Rus- sian embryology", which is said to be founded on the work of Metschnikow. In this sense, according to the author, the book opposes the "disproportionately stressed and unjustified development of the methodologically inadequate disci- pline of developmental mechanics, which has in practise banished from Em- bryology all progressive trends". It follows that the character of the book is highly theoretical. As a conse- quence of its theoretical starting-point, it deals mainly with the unicellular and the "lower" multicellular organisms, so that among the embryonic processes discussed the stress comes to lie on cleavage, segregation of sex cells and primary metamorphosis (including gastrulation). The bibliography (composed by the editors) is not very extensive, but makes mention of many papers and books from outside Eastern Europe. The illustra- tions, all line-drawings, are well executed without exception. "GENERAL GENETICS" 1956 by M. J. Sirks Martinus Nijhoff. The Hague 628 pp. with 238 figs and 5 pis Price: H.fl. 35.— (translated from the 5th Dutch edition) This book is the revised and augmented English translation of a Dutch book, the first edition of which appeared in 1922, and the latest in 1951. The book tries to establish an equilibrium between genetics as it was built up before 1940, and genetics as it has developed since. Therefore, consider- able attention is devoted to the earlier work in this field of science, and this work is time and again used as a basis for the discussion of more recent work. In connection with this feature, in the extensive bibliography the older literar ture is particularly well represented. This general trend of the book makes it seem particularly well suited as a text book for students and teachers, and so do also the numerous and very well reproduced illustrations, and the didactically clear style of writing. The typography and appearance of the book are excellent. "PRECIS D'HISTOLOGIE" 4th edition. 1956 by J. Verne Masson et Cie., Paris (formerly A. Branca & J. Verne) Price: Fr.fr. 2600 (sewn), 690 pp. with 408 figs 3200 (cloth bound) The first edition of this concise handbook appeared in 1934. It is meant in 214 the first place for students, but the authors have also tried to make it a concise reference work for physicians and biologists, by adding more detailed infor- mation in smaller type. The present edition has been brought up to date once more, particularly in the fields of cytochemistry and electron microscopy. The section on endocrine glands has been re-examined in the light of the most recent data. The book's handy size and clear typography make it very easy to consult. The illustrations are less satisfactory. The sparsely used photomicrographs are not very well reproduced, whereas the black-and-white drawings, in majority original, are usually not very distinct and often reproduced on too small a scale. Coloured plates are lacking. "LES METAMORPHOSES" by M. Abeloos Libr. Armand Colin, Paris 208 pp. with 37 figs Collection Armand Colin, no. 312 (pocket book size) This is the first book that deals exclusively with the phenomenon of meta- morphosis in a general way. This phenomenon is definable as the transforma- tion of a post-embryonic "larval" stage into an adult form with a different mode of life, and it is sufficiently distinguishable from other developmental phenomena to justify its separate treatment in book-form. In the first two chapters the author treats the best known phenomena of metamorphosis, viz. those occurring in the amphibians and insects respectively. The third chapter is devoted to a survey of the phenomena of metamorphosis throughout the entire animal kingdom. The last chapter discusses the problem of the relationships between meta- morphosis and evolution. The book has no alphabetical index and only a very limited bibliography (26 titles). It is illustrated with simple hne-drawings. "PARTHENOGENESIS AND POLYPLOIDY IN MAMMALIAN DEVELOPMENT" 1957 by R. A. Beatty Cambridge University Press, London 132 pp. with 5 figs (no. 7 of the "Cambridge Monographs and 2 pis in Experimental Biology") Price: 15 s. The present monograph serves the aim of bringing together all the present knowledge, until now widely scattered in the literature, concerning spontaneous and experimental parthenogenesis and polyploidy in mammals, while at the same time the non-mammahan (mainly amphibian) background is outlined for comparative purposes. The facts are of mainly cytological and embryological nature; those facts relating to postnatal stages still being highly controversial. However, some extrapolation into the post-natal period is attempted by way of working hypothesis. 215 The main feature of the book is the classification of the subject matter under a number of specific "routes of development", which are characterized by the operation or non-operation, either singly or in combination, of four cytological variables: 1. suppression of the first polar body; 2. of the second polar body; 3. of the first cleavage division; 4. genetic absence of spermatozoa. The author thus distinguishes a major group of sixteen routes of development (eight apo- mictic - parthenogenetic, and eight amphimictic routes), and a minor group of some ten routes, which are less well understood. The introductory chapter gives an outline of eutherian development, and furthermore contains the necessary terminological definitions as well as basic information regarding chromosome preparations and chromosome counting. The concluding chapters discuss a variety of subjects, among which are e.g. polyploid evolution in mammals; viability of polyploid mammals; genetic con- trol, sex determination, fertility and growth in parthenogenones and polyploids. Typographically the book has received the same care as preceding numbers of the series. "LE MACROMOLECOLE DEI VIVENTI" 1955 Congress Report Rendiconti dell* 1st. Convegno Antonio Baselli Lomb. di Sci. e Lettere a Milano, Pallanza. July. 1955 CI. di Sci., Vol. 89 (22 contributors) Price: $ 5. — 348 pp. This book represents a report on a Congress on biological macromolecules, held in Italy during 1955. It is in the form of a series of papers. Of the 22 contributors, 8 are from Italy, 7 from the U.S.A., 4 from England and 3 from other Western-European countries. The contributions are written in English (9), Italian (5), French (2) and German (1). The Italian papers are preceded by a summary in English, all other papers by an italian summary. The two papers concerned directly with embryonic stages are entitled: ,,Le macromolecole nella determinazione embrionale" (by S. Ranzi, 24 pp.) and ,,La lipovitellina dell'uovo di polio" (by G. Lanzavecchia, 20 pp.). The book is concluded by author and subject indexes. "GESTATION" Conference Trans. 1954—1956 edited by L. B. Flexner (1st Conf., The Josiah Macy, Jr Foundation, 1954) and C. A. Villee (2nd & 3rd Conf., New York 1955 and 1956) Price: 1st Conf. $ 5.— Total no. of pp. 720, figs 304, tabs 45 2nd Conf. $ 5.— 3rd Conf. $ 4.75 The Conferences reported on here are part of the Conference Programme of the Josiah Macy, Jr Foundation. This consists of a number of small groups of scientists in medicine and allied disciplines, mainly from the U.S.A.. who meet annually for a period of five or more years. At present the first three reports of the gestation group are available in the 216 form of three neatly printed and bound books, with a great number of good illustrations. The books contain a total of 22 contributions followed by group discussions. Most of these are concerned with the placenta, but some deal with such subjects as lactation, implantation, fetal circulation, fetal growth, fetal endocrine glands and sex differentiation. Each contribution is followed by a reference list, and each book contains an extensive index. "DIE SEXUALITAT" 2nd revised edition, 1956 by M. Hartmann Gustav Fischer Verlag, Stuttgart 463 pp. with 288 figs Price: D.M. 54.— The first edition of this book appeared in 1943. The book is dedicated to C. Correns, and is based to a great extent on Correns' theories of sexuality. The subject matter is divided into four parts, a division based on the one hand on the distinction between genotypical (chromosomal) and "phenotypical" (non-chromosomal) sex determination, and on the other hand on the phase (haploid or diploid) during which sex determination takes place. The book is concluded by chapters on general sex theory and general theory of fertilization. The general plan and the theoretical basis have not been changed in this new edition. Of course much new material has been incorporated, but some of the older theoretical matter that has been disproved in the meantime, has been omitted. The chapter on diplo-genotypical sex determination (chromosomal sex determination during the diploid phase, occurring in nearly all vertebrates) has been rewritten and considerably extended. In particular a separate section has been devoted to the developmental-physiological basis of this type of sex determination. The number of illustrations has been increased from 245 to 288, and most of the old figures have been redrawn. "THE AMERICAN ARBACIA AND OTHER SEA URCHINS" 1956 by Ethel Browne Harvey Princeton University Press 298 pp. with 12 text figs and (lay-out by G. J. Thieme, N.V., 16 pis (245 photogr.) Nijmegen, Netherlands) Price: $ 6. — The present book is unusual both in form and content. It deals almost ex- clusively with one species, Arbacia punctulata, viewed from many different angles. The book is composed of four parts. The first of these deals with the subjects of natural history, sex, breeding and classification, but besides this supplies interesting information on such varied subjects as etymology, historical des- criptions, fossils and the use of sea urchins as food and medicine. Parts two and three deal respectively with normal development and with egg centrifugation experiments. The chapters on normal development give equal attention to morphology and physiology. Clear diagrams have been added of the arrangement of membranes and layers before and after fertiliza- tion, according to Harvey and Dan. A special chapter is devoted to the sperm. 217 That this book has arisen from long years of personal experience is clear from the addition of many technical notes to the text. Again a quite different approach is followed in the fourth part, a compila- tion of experimental work on Arbacia punctulata arranged alphabetically under topics. With each topic a few important references to other species are given. The whole section comprises 83 pages written in note form and printed in small type. The bibliography according to the author includes all the important papers and books written on Arbacia punctulata (and also many on other sea urchins) from about 1850 until 1954. It covers 50 pages of small print. The original photographic illustrative material is brought together in the form of plates. The total number of photographs is 245. Their reproduction is excellent, as are the typography and lay-out of the book as a whole. "EXPERIMENTELLE ZELLFORSCHUNG. Hinweise auf ihre wichtigsten Aufgaben" . 3rd edition. 1956 by E. Kiister V.E.B. Gustav Fischer Verlag, Jena 73 pp. Price: D.M. 6.20 (sewn) The contents of this booklet by the deceased German plant cytologist, author of ,,Die Pflanzenzelle", are sufficiently characterized by the title. The first edition appeared in 1947; the present edition has been brought up to date by the author's wife from the author's own notes. It must be stressed that the author keeps almost exclusively to the botanical side of the problems throughout the booklet, a fact which is also evident from the author-index. "BIOLOGY OF THE LABORATORY MOUSE" 1956 by the Staff of the "^'VlJiflii *, f [;I Dover Publications, Inc. Roscoe B. Jackson Mem. Lab. New York (editor: G. D. Snell) Price: $ 6.— 497 pp. with 172 figs This is an unaltered reprint of the first edition of 1941 (Blakiston Com- pany). Therefore, it is perhaps superfluous to mention that the book contains two chapters of particular significance! to embryologists, viz. "The early em- bryology of the mouse", and ,. Reproduction", both by G. D. Snell. Also of interest is a list of gene and chromosome mutations. That the book has been reprinted without alteration implies that no literature of the last sixteen years has been incorporated. The book has been well printed, but unfortunately the numerous photo- micrographs have not been reproduced very well, which considerably reduces their value. This does not hold for the beautiful line drawings. 218 "HANDBOOK OF BIOLOGICAL DATA" 1956 Editor: W. S. Spector W. B. Saunders Co. 584 pp. small print Philadelphia, London This book is the outcome of a project of compilation that has taken seven years, and in which haven taken part some 17.000 biological scientists. Its object is to serve the student, the teacher and the biological and medical expert who seeks information outside his own area of specialization. The book has taken the form of a series of condensed tabular surveys, con- taining what is considered as , .established fact or recognized theory, free of controversies, and representing the consensus of expert judgment and expe- rience in any given field". There are 445 such tables, grouped in 10 categories (e.g. "Genetics, cytogenetics, and reproduction", 141 tables; "Development and morphology", 43 tables). There is a subject index, covering 38 pages, which should be used in coni- junction with the table of contents. As stated by the editor, the data as presented are by no means complete, but represent only the most generally useful, informative, and comprehensive material. A series of monographs, covering in more detail certain areas in this handbook, are in preparation. "THE BEGINNINGS OF EMBRYONIC DEVELOPMENT" 1957 edited by A. Tyler, American Association R. C. von Borstel and C. B. Metz for the Advancement of Science, (15 contributors) Washington D.C. 400 pp. with many figs Publ. no. 48 Price: $ 8.75 The basis for this book was formed by a symposium on "Formation and early development of the embryo", held at Atlanta in December, 1955. In order to extend its coverage, some additional articles were requested from investigators working in the same field. The total number of articles included is 13. All contributors are leading authorities, respectively from the U.S.A. (10), Italy (3) and England (2). The investigations presented cover descriptive, experimental and physiological work in many classes of animals. Each article is followed by an extensive list of references. The book is con- cluded by an alphabetical index. Printing and binding are very good. "THE STRATEGY OF THE GENES (A discussion of some aspects of theoretical biology)" 1957 by C. H. Waddington George Allen and Unwin Ltd (with and appendix by H. Kacser) London 262 pp. with 47 figs Price: 28 s. The nature of the present book is mainly theoretical. It consists of six essays, the last of which is by H. Kacser. 219 The first essay. "Form, end niid time", is concerned with the nature of biological organisation as such, while the second essay, entitled "The cyber- netics of development", deals with the processes which bring biological orga- nisation into being. The following three essays contain considerations of the theory of evolution. They are entitled respectively: "Selection of, for and by", "The organisation of the gene pool", and "The survival of the adaptable". After a short philosophical epilogue to the first five essays, which pleads for an epigenetic, rather than a purely phylogenetic consideration of evolution, the last essay treats "Some physico-chemical aspects of biological organisation". Extensive sub-headings for each chapter, given in the table of contents, pro- vide a useful "abstract" of the subject matter. The book is concluded by a bibliography and an alphabetical index. "EMBRYOGENESIS IN PLANTS" 1955 by C. W. Wardlaw Methuen & Co. Ltd, London 381 pp. with 84 figs John Wiley & Sons, Inc., New York Price: 45 s. In this book — the first of its kind — the author has wanted to give a comprehensive survey of initial development in all classes of plants, thus using the term "embryo" in its wider sense, including germs developing from spores. Along with the morphological facts, the author has included, wherever pos- sible, references to the physiological and genetical aspects of development, and to experimental work, thereby acknowledging trends which are much more recent in plant embryology than in the science of animal development. Lastly, the author considers the implications of embryology for the problems of phylogeny. in particular the questions of parallel and convergent evolution. The book has an extensive bibliography and alphabetical index. It is well printed and the illustrations are generally of good quality. "NEW RESEARCH TECHNIQUES OF NEURO-ANATOMY" 1957 edited by W. F. Windle Charles C. Thomas (10 contributors) Springfield, 111. 98 pp. with 25 figs Price: $ 4.75 This book represents a report of a Symposium sponsored by the National Multiple Sclerosis Society (U.S.A.). Although not bearing strictly on develop- ment, it is worth mentioning here because it supplies important information about recent technical developments in such fields as electron microscopy, sil- ver impregnation, tissue culture and histochemistry. The chapter "Tissue cul- ture studies of neural tissue", by Margaret R. Murray, is of more direct inter- est to embryologists. 220 II I ^unLll^'^^ LIBRARY UH lBt,5 Q