Annual issue o( the Hubreclit Laboratory seat of the „Institut International d'Embryologie" (Embryological section of the I.U.B.S.j 0 t CONTENTS a) Introduction p. 5 b) List of names and addresses with subjects in preparation (alpha- betical order) P- 7 c) List of institutes with composition of scientific staffs (geographical order) p. 98 d) List of subjects with names of investigators (arranged according to organ systems and systematic groups) p. 121 General division p. 121 I Descriptive and comparative embryology . . . . p. 123 II Experimental developmental morphology . . . . p. 130 III Physiology of development p. 137 IV Development and genetics p. 146 V Development and pathology p. 148 VI Regeneration p. 150 VII Metamorphosis p. 151 e) General questions and announcements I The Hubrecht Laboratory p. II The Central Embryological Library (C.E.L. ) . . p. III The Central Embryological Collection of shdes and material p. IV The Photographic Reproduction Service .... p. V The Normal Table of Xenopus laevis p. f) Facilitation of exchange and acquisition of Laboratory Anima g) 53 53 53 54 55 s . p. 153 p. 155 Communications of the ..Institut International d'Embryologie" (Embryological Section of the I.U.B.S.) p. 155 h) Reviews of recently published textbooks on embryology . p. 158 75821 5 INTRODUCTION General set-up This year again very little changes have been made in the set-up. The major change is the renaming of the ..general rubric" III Developmental physiology into: III Physiology o[ development. This was done because it appears that many collaborators do not make a clear distinction between the rubrics II Experimental developmental morphology, and III Developmental physiology. This is caused by the fact that the term ..developmental physiology" denotes a field which historically originates from, and still partly covers the field of ,, experimental developmental morphology". In the classification of systematic groups a special heading was added for the Protista. The sending-in o[ data We ask your attention for the following points: 1 . We urgently request you to return the forms before August 1st. Data received after November 1st cannot be taken up any more. 2. A number of collaborators still sends us bibliographical data about their recent pubhcations. May we remind those that we only record current or planned investigations? We hope to provide in the bibliopraphical needs of the embryological world in another way, according to our plans exposed in chapter g of this issue (page 156). 3. Collaborators working on the same subject are requested to send in separate forms for each of them personally. Subscriptions The subscription-fee remains H.fl. 22.75 which corresponds to U.S. $ 6. — . We want to bring to your special attention that hence- forward supscriptions are supposed to run until fur- ther notice. We can announce that the periodical is financially self-supporting. The num- ber of subscribers is more or less stationery, but it is our conviction that a number of institutes did not yet decide to take out a subscription, although they might profit a great deal by this Service. On request we will send a free copy of a preceding issue to those who are personally interested, or know staff members Ukely to show interest. We again ask your collaboration to reach those who are work- ing in a developmental field, but did not yet send in data. Will you please draw their attention to this Service, and send us their addresses? General remarks This year no data were received from China. The data from South America have augmented considerably. We ask your special attention for two new plans: 1 . The facilitation of exchange and acquisition of labora- tory animals by means of the G.E.I. S. (see chapter /. page 155) 2. The setting up of an Abstracting Preview Service, which will take the place of the announced ..annual survey of embryological literature" (see chapter g, page 156). In chapter h you will find reviews of six new books and revised editions. Finally chapter g contains an up-to-date list of fellows of the Institut International d'Embryologie. In the hst of names and addresses we have added the abbrevation F.I.I.E. to the names of the fellows (former members and emeritus members) of the I. I.E. J. FABER. A 7 Amp LIST OF NAMES AND ADDRESSES with Subjects in Preparation (■Ipliabetlcal order) ABERCROMBIE, M. M.A., B.Sc. — Dept of Embryol., Univ. Coll. Lon- don, Gower Str., LONDON W.C. 1, England (U.K.) a. Transplantation experiments on blastoderm tissue culture. Gallus domes- ticus (Aves) b. Cinematographic study of cell relations in tissue culture. Gallus domes- ticus (Aves) (in collaboration with Miss J. E. M. HEAYSMAN) c. Regeneration and induced prohferation in the adult. Rattus norvegicus (Rodentia) (in collaboration with Miss J. E. SANTLER) ADAMS, D. J. M.B., Ch.B. — Dept of Anat., Univ. of Liverpool LIVER- POOL, England (U.K.) a. The vascularization of the pancreas in particular relation to its embryo- logical development. (Mammalia) ADAMSTONE, F. B. Ph.D., Prof. — Dept of Zool., Univ. of Illinois, URBANA, 111., U.S.A. a. Development of the amnion. Gallus domesticus (Aves) ADELMAN. H. B. F.I.I.E.. Dr, Prof. — Dept of Zool., Cornell Univ.. ITHACA, N.Y., U.S.A. (no data received) AHSAN-ul-ISLAM M.Sc. — Dept of Embryol., Univ. Coll. London, Gower Str.. LONDON W.C. 1, England (U.K.) a. Experiments on regional determination. Gallus domesticus (Aves) AKESSON, B. Fil.kand. — Embryol. Dept, Zool. Inst, of the Univ. of Lund. LUND, Sweden, a. Development of the larva. (Sipunculida) ALDEN, R. H. Ph.D., Prof. — Univ. of Tennessee, Fac. of Biol. Sci., Med. Units Div.. MEMPHIS 3, Tenn., U.S.A. a. Study of egg transport and implantation; early development of tropho- blast; embryo-maternal relationships during nidation. Mus (Rodentia) ALGARD, F. T. Ph. D. — Dept of Anat., Stanford Univ., STANFORD, Cal., U.S.A. a. A study of the cytology and migratory behaviour of neural crest melano- blasts utilizing phase microscopy. (Amphibia) ALLANSON, Miss M. Ph.D. — Dept of Zool., King's Coll., Strand, LON- DON W.C. 2, England (U.K.) a. Seasonal growth of reproductive organs of some South African mammals. Tatera afra and Tatera brantsi (Rodentia) ALTSCHUL, R. M.D., Prof. — Dept of Anat., Univ. of Saskatchewan, SASKATOON, Canada, (no data received over some years) AMPRINO, R. M. M.D., Prof. — Inst, of human Anat., Corso Massimo d'Azegho 52, TORINO. Italy. a. Qualitative and quantitative development of cornea and sclera in embryos following removal of parts of the eye anlage. Gallus domesticus (Aves) b. Regulative and regenerative capacities of the primary optic vesicle in embryos. Gallus domesticus (Aves) Anc 8 Aub ANCEL, P. A. F.I.I.E.. Dr, Prof. (Honor., Emer.) — Inst, de Biol, physico- chimique, Fac. de Med., 13 Rue Pierre Curie, PARIS V^, France. — 61 Avenue Niel, PARIS, France. a. Chimioteratogenese. Gallus domesticus (Aves) b. Determinisme de la symetrie bilaterale. (Amphibia et Aves) ANDERS, G. Dr Phil. — Zool.-vergl. Anat. Inst., Naturw. Fak., Univ. Zurich, Kunstlergasse 16, ZURICH 6, Schweiz. (no data received on Nov. 1*', 1952) ANDRES, G. Dr — Zool.-vergl. Anat. Inst., Naturw. Fak., Univ. Zurich, Kijnstlergasse 16, ZURICH 6, Schweiz. (no data received on Nov. 1^', 1952) ANTON, H.-J. — Zool. Inst, der Univ. Koln. Kerpenerstr. 13, KoLN-LIN- DENTHAL, Deutschland. a. Die Regenerationsleistungen heteroplastischer Keimblattchimaren. AOTO. T. Rigakushi (M.S.) — Zool. Inst., Fac. of Sci., Hokkaido Univ., North 8. West 5, SAPPORO, Japan. a. Morphology and physiology of testes. Triturus pyrrhogaster (Urodela) b. Gonadal development and incretory organs. Pandalus kessleri (Deca^ poda) and Porcellio scaber (Isopoda) ARIeNS KAPPERS, J. M.D.. Prof. — Anat.-Embryol. Lab. der Rijks Univ., Oostersingel 69, GRONINGEN, Holland, a. The development of the brain. Xenopus laevis (Anura) (Normal Table) ARKEL, G.A. van B.Sc. — Zool. Lab. der Rijks Univ., Janskerkhof 3, UTRECHT, Holland, a. Development of head. Pleuronectes (Teleostei) ARMSTRONG, P. B. B.S., M.D., Prof. — Dept of Anat., School of Med., State Univ. of New York, SYRACUSE 10, N.Y., U.S.A. a. Function in the developing liver. Ambystoma punctatum (Urodela) and Amiurus nebulosus (Teleostei) AROSIO, G. Dott. Sci. Biol. — 1st. di Zool. e Anat. Comp.. Univ. di Milano, Via Celoria 10, MILANO, Italia, a. Myosin. (Vertebrata) h. Immunological development (Amphibia and Mammalia) c. Paper chromatography of embryonic extracts. (Amphibia) ASAYAMA, S. M.Sc, Dr Sc, Prof. — Lab. Exp. Embryol., Inst, of Poly- techn., Osaka City Univ., Minami-Ogimati, Kita-ku, OSAKA, Japan. a. Effects of various proteinic and sterolic hormones upon the sex differen- tiation of the gonad. Hynobius nebulosus (Schlegel) (Urodela) b. Histochemical study of gonadogenesis. Triturus pyrrhogaster (Boie) and Hynobius nebulosus (Schlegel) (Urodela) ASSENMACHER, I. Dr en Med. — Inst. d'Embryol. et de Morphol. exper., Fac. de Med., 1 Place de I'Hopital, STRASBOURG, (Bas-Rhin), France, a. Development of gonads, hypophysis and hypothalamus. Gallus, Anas and Columba (Aves) (in collaboration with J. BENOIT) ATLAS, M. B.S., A.M., Ph.D., Assoc. Prof — Dept of Biol., Yeshiva Univ., 186th Str. and Amsterdam Ave, NEW YORK 33. N.Y., U.S.A. (no data received on Nov. 1^*, 1952) AUBRY, Miss R. Lie. es Sci. — Inst, de Zool., Lab. de Biol, gener., Fac. des Sci. de Strasbourg, 12 Rue de I'Universite, STRASBOURG, France. a. Etude de la lignee germinale. (Amphibia) Auer 9 * Bar AUER. J. M.D., D.M.Sc, Prof. — Holland Ave 435. OTTAWA, Quebec, Canada. (no data received over some years) AUSTIN. C. R. M.Sc. B.V.Sc. — Div. of Animal Health and Production, C.S.I.R.O., McMaster Animal Health Lab.. Parramatta Rd., Glebe. SYDNEY. N.S.W., Austraha. a. Investigation of fertilization and segmentation by histochemical methods and with phase-contrast and ultraviolet microscopy. Rattus rattiis (Ro- dentia) (in collaboration with A. W. H. BRADEN) b. Chemical and physical factors involved in the sperm penetration of the zona pellucida. Rattus rattus (Rodentia) and Onjctolagus cuniculus (Lagomorpha) (in collaboration with A. W. H. BRADEN) c. Distribution and passage of sperms trough female tract; significance of numbers. Rattus rattus (Rodentia) and Oryctolagus cuniculus (Lago- morpha) (in collaboration with A. H. W. BRADEN) AVEL, M. F.I. I.E.. Dr. Prof. — Fac. des Sci. de Bordeaux. 40 Rue Lamar- tine, TALENCE (Gironde), France. AVIS. F. R. A.B. Brown Univ. — Roscoe B. Jackson Memorial Lab.. BAR HARBOR, Me. U.S.A. (no data received on Nov. 1«*. 1952) BACCI. G. Dr, Prof. — Zool. Dept, Zool. Station, NAPLES, Italy. (no data received) BACKSTROM, S. A. A. — Wenner-Grens Inst, for experimental Biology, Norrtullsgatan 16, STOCKHOLM Va., Sv/eden. a. Morphological studies on hthium-treated and iodosobenzoic acid-treated developing eggs. Psammechinus miliaris (Echinoidea) BAGInSKI, S. M.D. — Inst, of Histol. & Embryol., Acad, of Med., Naruto- wicza 60, LODZ, Poland, a. Influence of suphonamides on the size of embryos. Gallus (Aves) BALINSKY, B.I. F.I. I.E., Dr of Biol.Sci. — Dept of Zool., Univ. of the Witwatersrand, Milner Park, JOHANNESBURG, South Africa. a. The eye-lens correlation. Xenopus laeuis, Bufo tegularis, Bufo carens, Phrynobatrachus natalensis, Pijxicephalus delalandii, Pyxicephalus adspersus (Anura) BAFFONI. G. M. Dr — Zool. Dept of the Univ. of Cagliari, Viale B. Bartolomeo 1, CAGLIARI, Sardegna. Italy. (no data received on Nov. 1*', 1952) BAKER, R. C. B.A., M.Sc, Ph.D., Prof. — Dept of Anat.. Ohio State Univ., COLUMBUS 10. Ohio, U.S.A. (no data received over some years) BALTZER, F. F.I. I.E., Dr, Prof. — Zool. Inst, der Univ. Bern. Sahlistr. 8. BERN, Schweiz. a. Entwicklung von Bastarden. Triton x Salamandra (Urodela) , (Echi- noidea) b. Chimaren. Triton x Bombinator (Amphibia) (in Zusammenarbeit mit H. EYMANN und W. HENZEN) c. Problem der Homologie. Chimaren. (Amphibia) BARCH, Mrs S. — Dept of Zool., State Univ. of Iowa. IOWA CITY, Iowa, U.S.A. a. Metabolic studies of the normal and thyroxin-stimulated skin of tadpoles. Rana pipiens (Anura) (in collaboration with J. J. KOLLROS) Bari 10 Baut BARIGOZZI, C. Dr Sc, Prof.Ord.Genet. — 1st, di Genet., Via Celoria 10, Univ. di Milano, MILANO, Italia, a. Development of tumours. (Urodela) h. Development of melanomes with different genotypes. Drosophila (Insecta) BARRY A. Ph.D., Assoc. Prof. — Dept of Anat., Univ. of Michigan^ Med. School. 2500 East Med. Bldg. ANN ARBOR, Mich., U.S.A. (no data received over some years) BARRY, T. H. M.Sc. — Zool. Inst.. Univ. of Stellenbosch, STELLEN- BOSCH, S. Africa, a. Ontogenesis of the skull. Bufo angusticeps (Anura) BARTELMEZ, G. W. Ph.D. — Dept of Embryol., Carnegie Inst, of Wash- ington, Wolfe and Madison Strs, BALTIMORE 5, Md. U.S.A. a. Blood supply of uterus. Macaca mulatta (Primates) b. Early development of optic vesicle. Homo sapiens (Primates) c. Earliest development of oral hypophysis. (Primates) BARTH, L. G. F.I. I.E., Ph.D., Prof. — Dept of Zool., Columbia Univ., NEW YORK 27, N.Y., U.S.A. a. Chemical embryology of the egg. (Amphibia) b. Determination of polarity. (Hydroidea, Hydrozoa) , (Ascidae, Urochor- data) BARTH, Mrs L. J. Ph.D. — Dept of Zool.. Fac. of pure Sci.. Columbia Univ.. Broadway and 166 Str.. NEW YORK 27. N.Y., U.S.A. a. Phosphate metabolism in the egg. Rana pipiens (Anura) BAST, T. H. Ph.D.. B.A., Prof. — Dept of Anat.. Univ. of Wisconsin. MADISON. Wis.. U.S.A. (no data received on Nov. U\ 1952) BATTAGLIA. B. D.Sc. — 1st. di Genet. dell'Univ. di Napoh, Fac. di Sci.. Via Mezzocannone 8. NAPOLI, Italia, (no data received over some years) BATTLE. Miss H. I. Ph.D.. Prof. — Dept. of Zool.. Univ. of Western Ontario. LONDON. Ont.. Canada. a. Effects of urethane (ethyl carbamate) on early developmental processes. Salmo trutta fario, Brachydanio rerio (Teleostei) h. A survey of the larval and young fish of central lake Erie. (Teleostei) c. Effects of urethane (ethyl carbamate) on development. Rana pipiens (Anura) BATTY Th. A.B. — Dept of Anat.. Univ. of Kansas. Med. School. LAW- RENCE. Kan.. U.S.A. a. Development of all systems in relation to behavior. Opsanus tau (Pisces) (in collaboration with H. C. TRACY and J. WINBLAD) b. Development of the gastro-intestinal tract in relationship to behavior. Opsanus tau (Pisces) c. Development of the skeletal, blood vascular, and muscular systems in relationship to behavior. Opsanus tau (Pisces) BAUMANN. J. A. Dr. Prof. — Inst. d'Anat.. 20, Rue Ecole de Med., GENfiVE. Suisse. (no data received over some years) BAUTZMANN. H. Dr Med., Prof. — Anat. Inst, der Univ. Hamburg. Schottmullerstr. 1. HAMBURG 20. Deutschland. a. Entwicklungsphysiologie der Primitiventwicklung. (Vertebrata, bcs. Amphibia) Bautzmann 11 Beng b. Entwicklung des lymphatischen Systems. (Vertebrata) c. Amnionentwicklung und Histologic. (Vertebrata) BAX, W. A. Med. Dr — Anat.-Embryol. Lab. of the Univ. of Leyden, Fac. of Med., Wassenaarseweg, Boerhaavekwartier, LEIDEN, Holland, (no data received on Nov. 1**, 1952) BAXTER, E. W. B.Sc. — Biol. Dept. Guy's Hosp. Med. School, LONDON S.E. 1, England (U.K.) a. Biology, including development and metamorphosis. Petromyzon (Cy- clostomata, Pisces) BEATTY, R. A. B.A., M.A., Ph.D. — Inst, of Anim. Genet.. Univ. Dept of Genet., King's Buildings, West Mains Rd, EDINBURGH 9, Scot- land (U.K.) a. Heteroploidy and parthenogenesis; egg transfer; operations on embryos. Mas musculiis and Lepus cuniculus (Rodentia) (in collaboration with G. G. SELMAN) b. Breeding of genetically tagged strains for use in experimental embryo- logy. Lepus cuniculus (Rodentia) BEAU, A. A. Dr, Prof. — Lab. d'Anat., Inst. Anat., Fac. de Med. 31 Rue Lionnois, NANCY (Meurthe & Moselle), France. a. Organogenese du poumon. Homo (Primates) (en collaboration avec A. DOLLANDER et M.. LAURENT) b. Organogenese dc I'articulation du coude. Homo (Primates) (en collabo- ration avec J. RABISCHONG) c. Organogenese de I'articulation du poignet. Homo (Primates) (en colla- boration avec J. CAYOTTE et J. SOMMELET) d. Organogenese de I'articulation tarso-metatarsienne (articulation de Lis- franc). Homo (Primates) BeLANGER, L. F. Prof. — Dept of Histol., Fac. of Med., Univ. of Ottawa, OTTAWA, Quebec, Canada, a. Mineralization during development. (Mammalia) h. Improvement of the Gomori technique for histological detection of phos- phatase activity, c. Technique of elemental analysis of tissue constituents making use of in vitro exchange and autoradiography. BELLAIRS— MORGAN, Mrs M. R. B.Sc, Ph.D. — Dept of Embryology. University College London, Gower Str., LONDON W.C. 1, England (U.K.) a. Development of the foregut. Gallus domesticus (Aves) BENAZZI, M. Prof. ord. — 1st. di Zool. e Anat. Comp. dell'Univ., Via A. Volta 4, PISA. Italia, a. Fertilization, pseudogamy, polyploidy and heredity. (Tricladidea, Turbel- laria) BENAZZI— LENTATI. Mrs G. Lib. Doc. — 1st. di Zool. e Anat. Comp. dell'Univ., Via A. Volta 4, PISA, Itaha. a. Ovo- and spermatogenesis; fertilization and cytology. Dugesia gonoce- phala and allied forms (Tricladidea, Turbellada) BENGMARK, S. Med. kand. — Tornblad-Inst. of comp. Embryol., Biskops- gatan 7, LUND, Sweden, a. Development of prostata. (Mammalia) h. Development of rhombencephalic nuclei. Mus musculus (Rodentia) team work with R. HUGOSSON and B. KALLfiN) Beno 12 Bil BENOIT, J. Dr en Med., Dr es Sc. Prof. — Lab. d'Histophysiol., Coll. de France, Place Marcelin Berthelot, PARIS V^, France. a. Development of gonads, hypophysis and hypothalamus. Gallus, Anas and Columba (Aves) (in collaboration with I. ASSENMACHER) BENOIT, J. A. A. Agr.d'Anat. — Ecole Nationale Veterinaire, TOU- LOUSE, France, a. Etude de la cinematique tardive des greffons d'organisateur. Triton, Pleurodeles, Ambystoma (Urodela) h. Localisation des rayons X avec I'appareil Philips de contact: application a I'embryogenie. Salmo fario (Teleostei) BER, A. Dr, Prof. — Dept of Endocrinol., Fac. of Med., Acad, of Lodz, Nowotki 137. L6DZ, Poland, (no embryological work in progress) BERG, W. E. A.B., M.S., Ph.D., Prof. — Dept of Zool., Univ. of CaUf., BERKELEY 4, Cal.. U.S.A. (no data received on Nov. 1^*, 1952) BETRGQUIST, H. — Tornblad-Inst. of comp. Embryol., Biskopsgatan 7, LUND, Sweden. a. The ontogeny of the diencephalon. (Reptilia and Mammalia) BERNSTEIN, M. H. Ph.D. — Dept of Zool., Univ. of Cahfornia, BER- » KELEY 4, Cal:, U.S.A. a. Nuclease and nucleic acid metabolism of embryonic material. Strongylo- centtotus purpuratus (Echinoidea) , Rana pipiens (Anura) b. Effects of homologous and heterologous nucleoproteins on early develop- ment. ( Echinodetmata) BERRILL, N. J. Ph.D., D.Sc, Prof. — Dept of Zool., McGill Univ., MON- TREAL. Quebec, Canada, (no data received on Nov. 1^', 1952) BIER, K. Dr rer.nat. — Inst, fiir Angewandte Zool. der Univ., Naturw. Fak., Rontgenring 10. WuRZBURG, Deutschland. a. Untersuchungen iiber das Schick^al des Polplasmas wahrend der Friih- embryogenese. Camponotus liguiperda, Formica tufa (Formicidae, Hyme~ noptera) b. Entwicklung der larvalen Gonaden. Formica rufa u.a. (Formicidae, Hy- menoptera) BIJTEL, Miss J. H. Dr Sc. — Anat.-Embryol. Lab. der Rijks Univ., Oos- tersingel 69, GRONINGEN, Holland. a. Investigations concerning the process of outgrowth of the tail with special reference to the role of the chorda dorsalis and the tail mesoderm. Amby- stoma mex., Triton taen. and Xenopus laevis (Amphibia) b. Experiments concerning the factors which determine the normal course of the outgrowing pronephric duct. Ambystoma mex., Triton taen. and Xenopus laevis (Amphibia) c. Development and phylogenetic origin of the columella auris. Ambystoma mex., Triton taen. and Xenopus' laevis (Amphibia) d. The development of the eye. Xenopus laevis (Anura) (Normal Table) BILLINGHAM, R. E. M.A., D.Phil. (Oxon) — Dept of Zool. and Comp. Anat., Univ. Coll. London, Gower Str., LONDON W.C. 1, England (U.K.) a. Development of capacity to respond to homologous antigens. Bos taurus (Artiodactyla) and Mus musculus (Rodentia) Bis 13 Bod BISHOP, D. W. Ph.D. — Dept of Embryol., Carnegie Inst, of Washington, Wolfe and Madison Streets. BALTIMORE 5. Md, U.S.A. a. Physiology and metabolism of spermatozoa. (Mammalia) h. Intra-tubal factors influencing sperm motility and transport. (Mammalia) BISS, R. Dr M. — Lab. des Travaux Anatomiques, Fac. de Med., 15 Rue Ecole de Medecine, PARIS V^. France. a. Developpement de I'encephale et des nerfs craniens. Homo (Primates) (en collaboration avec Ch. EYRIES) b. Oreille interne et complexe acoustico-facial. Homo (Primates) (en colla- boration avec Ch. EYRIES) BLEAKLY, M. C. D.Phil. — Zool. Dept, Univ. of Queensland. George Str.. BRISBANE, Queensland, AustraHa. (no embryological work in progress) BLECHSCHMIDT , E. Dr Med., o.o. Prof. — Anat. Inst, der Univ., Burg- strasse 51, GGTTINGEN, Deutschland. a. Wachstumbewegungen der Hautorgane beim Embryo. Homo (Primates) h. Entwicklung der Gliedmassen beim Embryo. Homo (Primates) c. Experimentelle Beeinflussung der Stoffwechselmechanik durch schwcres Wasser. Cricetus auratus (Rodentia) d. Metallbeschattung (Technik). e. Entwicklung der Zahnkeime beim Embryo. Homo (Primates) f. Funktionsentwicklung des Cortischen Organs beim Embryo. Homo (Primates) g. Entwicklung der Sehnenscheiden beim Embryo. Homo (Primates) BLOKZIJL, E. J. — Anat.-Embryol. Lab. der Rijks Univ., Oostersingel 69. GRONINGEN, Holland, a. A morphological and experimental study of the development of the hmb buds with special reference to the role played by the myotomes in the development of the musculature of the hmbs. Ambystoma mex. (Urodela) and Mus musculus albinus (Rodentia) BLOUNT, R. F. B. S., M.S., Ph.D., Prof. — Dept of Anat., Med. Branch, Univ. of Texas, GALVESTON, Tex., U.S.A. a. Relations of the hypophysis to development. Ambystoma maculatum (Urodela) b. Experimental hypertension and embryonic transplantation of hypophysis. Ambystoma maculatum (Urodela) c. Endocrine studies and development, time of beginning function. Mus musculus (highly inbred local strain) (Rodentia) BLUNTSCHLI, H. F.I.I.E., Dr, Prof. (Emer.) — Anat. Inst., Biihlstr 26. BERN, Schweiz. (no embryological work in progress) BODENSTEIN, D. — Chemical Corps Med. Labs, Army Chemical Center. MARYLAND, Md, U.S.A. a. Development of the dorsal fin; the relation of ectoderm and mesoderm in the process of fin induction. Ambystoma punctatum (Urodela) h. The humeral control of growth and metamorphosis, studied by trans- plantation and parabiosis experiments. Periplaneta americana (Insecta) c. Physiological mechanism of hormone actions; the relations of hormones to fat, protein and carbohydrate metabolism. Periplaneta americana and Drosophila species (Insecta) d. The role of the prothoracic gland in postembryonic development. Pen- planeta americana (Insecta) Boe H Bour BOEKE. J. F.I. I.E.. Dr. Prof. (Emer.) — Ramstraat 47. UTRECHT. Hol- land, (no data received on Nov. \^\ 1952) BOELL, E. J. Ph.D.. Prof. — Osborn Zool. Lab.. Yale Univ.. NEW HAVEN 11, Conn., U.S.A. (no data received on Nov. \'\ 1952) BONDI, C. Dott. — 1st. di Biol, gen., Fac. di Med., S. Pietro, PERUGIA. Italia, a. Ricerche sperimentali sulla catalasi (ossifiro di Spirito). Bufo uitidis e vulgaris (Anura) BONfi, E. — Lab. d'Embryol., Inst, de Zool.. Univ. de Louvain. 71, Rue de Namur, LOUVAIN. Belgique. (no data received over some years) BONIN, W. B.A., M.D.. Prof. — Dept d'Histol. et d'Embryol.. Univ. de Montreal. 2900 Boulevard du Mont-Royal. MONTREAL. Canada, (no embryological work in progress) BONNER. J. T. Ph.D., Assoc.Prof. — Dept of Biol., Princeton Univ., PRINCETON. N.J.. U.S.A. a. Problems of morphogenetic movements and differentation. Dictyostelium discoideum (Acrasiales) b. Problems of morphogenesis. Chondromyces crocatus (Myxobacteriales) 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 egg tot pre-adult. Egg deposition, culture methods, day to day observations and records of living larvae and juve- niles, study of fixed and sectioned material. Dasybranchus caducus (Polychaeta) h. 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) BOREI. H. Ph. D. — Wenner-Grens Inst, for experimental Biology. Norr- tullsgatan 16. STOCKHOLM Va.. Sweden. a. Respiration of eggs in different stages of development. Enzymatic con- stitution of eggs, kinetics of enzyme action. Arbacia punctulata, Lyte- chinus pictus, Psammechinus miliaris and other spec. (Echinoidea) b. Sulphur metabolism during embryonic development; participation of the enzyme rhodanase. Sulphur content at different developmental stages. Gallus domesticus (Aves) BOSSCHAERT, D. B.Sc. — Zool. Lab. der Rijks Univ.. Janskerkhof 3. UTRECHT. Holland, a. Analysis of lithium action. Limnaea stagnalis (Gastropoda) (in colla- boration with Miss C. H. M. BRAAT, Miss S. C. A. HAVE, Miss A. H. LYESEN. J. H. W. NICOLAI, Miss A. J. PARIS. Chr. P. RAVEN. F. van RIJCKEVORSEL and Miss L. G. de VRIES) BOUIN, P. Dr. Prof. (Emer.) — VENDRESSE. Ardennes. France. BOUNOURE, L. Prof. — Inst, de Zool.. Lab. de Biol, gener.. Fac. des Sci. de Strasbourg. 12 Rue de I'Universite. STRASBOURG, France. a. Initial development: primordial germ-cells, development of the gonads. (Amphibia) BOUR. |. W. H. Med. Drs — Anat.-Embryol. Lab. of the Univ. of Leyden. Fac. of Med.. Wassenaarseweg, Boerhaavekwartier, LEIDEN, Holland. (no data received on Nov. 1«*, 1952) Bov 15 Brc BOVEY R. Dr es Sc. — M.R.C. Biophysics Res. Unit. King's Coll.. Strand. LONDON W.C. 2, England (U.K.) (no data received over some years) BOVING B. G. A.B.. M.D. — Dept of Embryol.. Carnegie Inst, of Wash- ington. Wolfe and Madison Strs. BALTIMORE 5. Md. U.S.A. a. Blastocyst orientation and implantation mechanisms. Lepus cuniculus (Rodentia) b. Relation of trophoblast invasion to bloodvessels underlying uterine epithelium. Lepus cuniculus (Rodentia) BOYER, C. C. B.S.. M.A., Ph.D., Prof. — Univ. of Alabama. Med. Center. BIRMINGHAM 5, Alabama. U.S.A. a. Rate of metabolism during development. Gallus domesticus (Aves) h. Study of the development. Cricetus auratus (Rodentia) BRAAT Miss C. H. M. B.Sc. — Zool. Lab. der Rijks Univ., Janskerkhof 3, UTRECHT, Holland, a. Analysis of lithium action. Limnaea stagnalis (Gastropoda) (in collabo- ration with D. BOSSCHAERT, Miss S. C. A. HAYE, Miss A. H. LYE- SEN. J. H. W. NICOLAI, Miss A. J. PARIS. Chr. P. RAVEN, F. van RIJCKEVORSEL and Miss L. G. de VRIES) BRACHET, J. L. A. F.I. I.E., M.D., Prof. — Lab. de Morphol. anim., Univ. hbre de Bruxelles, 1850 Chaussee de Wavre. BRUXELLES-Auderghem, Belgique. a. Studies on the metabolism of letal hybrids. (Amphibia) b. Action of dinitrophenol and usnic acid on development. (Amphibia) c. Cytochemical observations on the first stages. (Amphibia) (in collabora- tion with J. J. PASTEELS) d. Action of heavy metals on development. Rana, Ambystoma (Amphibia) BRADEN, A. W. H. B.Sc. (Adelaide), M.Sc. — Div. of Animal Health and Production. C.S.I.R.O., McMaster Animal Health Lab., Parramatta Rd., Glebe. SYDNEY, N.S.W., Australia. a. Investigation of fertilization and segmentation by histochemical methods and with phase-contrast and ultraviolet microscopy. Rattus rattus (Rodentia) (in collaboration with C. R. AUSTIN) b. Chemical and physical factors involved in the sperm penetration of the zona pellucida. Rattus rattus (Rodentia) and Oryctolagus cuniculus (Lagomorpha) (in collobaration with C. R. AUSTIN) c. Distribution and passage of sperms through female tract; significance of numbers. Rattus rattus (Rodentia) and Oryctolagus cuniculus (Lagomor- pha) (in collaboration with C. R. AUSTIN) BRAMBELL. F. W. R. B.A., Ph.D.. D.Sc, F.R.S. — Dept of Zool., Univ. Coll. of North Wales. BANGOR, Caernarvonshire, N. Wales (U.K.) a. Immunological relations of mother and young. Oryctolagus cuniculus (Rodentia) BRANDT, W. M.D.. Ph.D. — Dept of Anat.. The Med. School. Birming- ham ilniv. Edgbaston. BIRMINGHAM 15. England (U.K.) a. Development of malformations of hmbs. (Amphibia) b. Investigations on pathological development. (Amphibia) c. Human embryology. Homo sapiens (Primates) BRETSCHER. A. Dr Phil.nat. — Abt. fur Zoophysiologie. Zool. Inst, der Univ.. Sahhstr. 8, BERN. Schweiz. a. Development of the leg; Polydactyly. Gallus domesticus (Aves) Bretscher 16 Burns b. Development of the leg; influence of colchicine. Gallus domesticus (Aves) c. Development of the leg; influence of the epidermis. Gallus domesticus (Aves) d. The development of skeleton and muscles of the pelvic-girdle and hind limbs. Xenopus laevis (Anura) (Normal Table) BRETSCHNEIDER. L. H. — Zool. Lab., State Univ. of Utrecht, Fac. of Sci., Janskerkhof 3, UTRECHT. Holland. (no embryological work in progress) BRIEN, P. L. F.I.I.E., Dr, Prof. — Lab. de Zool.. Fac. des Sci.. Inst, de Zool. Torley-Rousseau, Univ. libre de Bruxelles, 50 Av. F.D. Roosevelt, BRUXELLES, Belgique. (no data received on Nov. 1^*. 1952) BRIGGS, R. W. Ph.D. — Lankenau Hospital Research Inst, and Inst, for Cancer Research, Burholme Ave, Fox Chase. PHILADELPHIA 11, Pa, U.S.A. a. The problem of nuclear differentiation, investigated by means of trans- plantation of embryonic cell nuclei into enucleated eggs. Rana (Anura) (in collaboration with T. J. KING) BRIONES. H. M.D. — Inst, de Biol. ..Juan Noe". Univ. de Chile, Casilla 2988. SANTIAGO. Chile, a. Interspecific transfer of eggs. (Rodentia) BROERS. C. J. M.Sc. — Anat.-Embryol. Lab. der Rijks Univ., Janskerkhof 3. UTRECHT. Holland, a. The development of the tympanic region and skull. (Mammalia) BR0NDSTED. H. V. F.I.I.E.. Dr Phil.. Prof. — Inst, for Aim. Zool., Uni- versitetsparken 3, COPENHAGEN p, Denmark. (no embryological work in progress) BRUNER, TAiss J. A. Ph.D. — Zool. Dept. State Univ. of Iowa. IOWA CITY. Iowa. U.S.A. a. Hormones and sex differentiation. Ambystoma (Urodela) b. Respiratory metabolism of eggs. Rana pipiens (Anura) c. Natural causes of teratogenic development. (Mammalia) BUCHER. N. — Zool.-vergl.Anat. Inst., Naturw. Fak., Univ. Zurich, Kiinstlergasse 16, ZURICH 6. Schweiz. (no data received on Nov. 1**, 1952) BUNO. W. F.I.I.E., B.S., Ph.D., Prof. — Dept de Histol. y Embriol., Fac. de Med., MONTEVIDEO. Uruguay. S. America. (no data received over some years) BURDON-JONES. C. B.Sc. Ph.D. — Dept. of Zool.. Univ. Coll. of North Wales. BANGOR, Caernarconshire. N. Wales (U.K.) a. Embryology. (Protochordata) BURNS. R. K. F.I.I.E.. A.B.. Ph.D.. — Dept of Embryol., Carnegie Inst, of Washington, Wolfe and Madison Strs. BALTIMORE 5. Md. U.S.A. — Hon. Prof, of Zool., Dept of Biol., The Johns Hopkins Univ.. BAL- TIMORE 18. Md, U.S.A. a. The experimental control of sex differentiation in the embryo by means of hormones. Didelphys virginiana (Marsupialia, Mammalia) b. A study of gonad modifications induced by hormones, and the reactions of the gonoducts and urogenital sinus to hormones. Didelphys virginiana (Marsupialia, Mammalia) But 17 Camp BUTLER, E. G. Ph.D.. Sc.D.. 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 and Ambystoma opacum (Urodela) h. Blastema formation and regeneration in limbs in which proximodistal polarity has been reversed. Ambystoma punctatum and Ambystoma opa- cum (Urodela) c. Regression (reduction) and subsequent reconstitution. Clavelina lepadi- [ormis (Tunicata, Urochordata) d. Effects of ultraviolet radiation on limb development and limb regene- ration. (Urodela) BUTROS, J. M.A. — Dept of Biol., Emory Univ., EMORY UNIVER- SITY, Ga, U.S.A. a. Physico-chemical studies on cell division. Ilyanassa obsoleta (Gastro- poda) BUTZ. P. — Zool. Inst, der Univ., Katharinenstr. 20, FREIBURG i. Brsg., Deutschland. a. Entwicklung der Sehleistung (Lepidoptera; Culicidae, Dipteta) (ge- meinsam mit H. LuDTKE und G. HAAS) CAIRNS, J. M. A.B., M.S., Ph.D., Asst Prof. — Dept of Anatomy, School of Medicine, University of Oklahoma, OKLAHOMA CITY, Okla., U.S.A. a. The induction of regional characteristics of feather structure. Gallus domestlcus (Aves) b. The action of genes (frizzled and silky) in the development of the feather. Gallus domestlcus (Aves) c. Study of the differentiation of the limb structure. Gallus domestlcus (Aves) CALLAN, H. G. M.A., D.Sc, Prof. — Dept of Zool., The University, ST ANDREWS, Scotland (U.K.) a. Reciprocal hybridisation with a view to studying cytoplasmic effects and hybrid meiosis. Triturus vulgaris, palmatus and cristatus (Urodela) h. Structure of chromosomes in oocytes. Triturus cristatus carnifex (Urodela) c. Morphological and physiological studies on germinal vesicle nucleus. Structure and properties of nuclear membrane, sap, etc. Triturus spp., Xenopus laevis (Amphibia) d. Structure of sperm heads and determination of shape. (Amphibia) CAMBAR, R. Dr — Lab. de Biol. Gen., Fac. des Sci. de Bordeaux, 40 Rue Lamartine, TALENCE (Gironde), France, a. Developpement du systeme renal. Xenopus laevis (Anura) (Normal Table) (en collaboration avec R. WILLIAUME) CAMPENHOUT, E. van F.I. I.E., Dr, Prof. — Inst. d'Anat., Univ. de Louvain, 38 Rue des Recollets, LOUVAIN, Belgique. a. Embryological development of the innervation of the gonads. (Aves) b. Regeneration of the central nervous system in the embryo. Gallus (Aves) c. Development of the peripheral nervous system. Homo (Primates) d. Development of the visceral nervous system. Crocodilus (Reptilia) e. Development of the cranial nerves. Crocodilus (Reptilia) Car 18 Cel CARPENTER, Miss E. B.A.. M.S.. Ph.D. — Zool. Dept. Smith College. NORTHAMPTON, Mass., U.S.A. a. Organ culture in vitro, particularly thyroid morphogenesis and his- tological differentiation. Gallus domesticus (Aves) and Rattus norvegicus (Rodertia) b. Effect of parathyroid hormone on developing bone in vitro. Mus musculus (Rodentia) CARTER, T. C. Ph. D. — Med. Res. Council. Inst, of Anim. Genet., King's Buildings, West Mains Rd.. EDINBURGH 9, Scotland (U.K.) a. Developmental study of the luxate (tibial h e m i m e 1 i a) mutant. Mus musculus (Rodentia) h. Study of abnormal embryos induced by injecting trypan blue into preg- nant animals. Mus musculus (Rodentia) (in collaboration with C. H. WADDINGTON) CASE. J. F. Ph.D. Johns Hopkins Univ. — U.S. Dept of Agriculture, Bureau of Animal Industry, BELTSVILLE, Md, U.S.A. (no data received on Nov. 1^*, 1952) CASPARI, E. W. Ph.D., Prof. — Dept of Biol., Wesleyan Univ., MIDD- LETOWN. Conn., U.S.A. a. Development of eye pigmentation in wild type, aa and wa wa strains. Ephestia kuhniella (Lepidoptera) h. Development of trail structure in normal, Brachyury, Kinky and Fused strains. Mus musculus (Rodentia) c. Mitochondria in development and heredity. 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. Pertromyzon fluviatilis (Cyclostomata) h. Azione e reazione nella metamorfosi. Bu[o vulgaris (Anura) c. Fermenti embrionali. Petromyzon (Cyclostomata) CASTIGLIONI. Miss M. C. Dr — 1st. di Genet., Via Celoria 10, Univ. di Milano. MILANO, Italia. a. Development of imagnial discs for the study of the compound eye forma- tion. Drosophila (Insecta) b. Transplantation of eye discs between stocks with developmental abnor- malities of the eye. Drosophila (Insecta) CATE, G. ten Physician — Anat.-Embrvol. Inst.. Gemeentelijke Univ. van Amsterdam, Mauritskade 61, AMSTERDAM O.. Holland, a. Study about the origin of the specific lens protein a- crystallin in deve- lopment. Rana a.o. (Amphibia), Gallus (Aves) CAYOTTE. J. — Lab. d'Anat., Inst. Anat., Fac. de Med.. 31 Rue Lionnois, NANCY (Meurthe & Moselle), France. a. Organogenese de I'articulation du poignet. Homo (Primates) (en colla- boration avec A. A. BEAU et J. SOMMELET) CEI, J. M. Dr Biol. Sc. — Inst, de Zool., Univ. Nac. de Tucuman. Miguel Lillo 205, TUCUMAN, Argentina, S. America. (no data received over some years) CELESTINO da COSTA, A. F.I.I.E., Drhon. causa: Bordeaux 1923. Tou- louse 1929. Prof. — Inst, de Histol. e Embriol. Fac. de Med., LISBOA. Portugal, (no data received over some years) Cen 19 Cheney CENACCHI, Miss M. Dr Nat.Hist. — 1st. di Anat. Comp., Via Belmeloro 8. BOLOGNA (103). Italia. a. Variations of total P during development. Rana esculenta (Anuta) CENTAMORI. M. Dott. — 1st. di Biol, gen., Fac. di Med., S. Pietro, PERUGIA. Italia, a. Comportamento degli acidi nucleinici in embrioni di vegetali. Lupinus albus (Lequminosae, Dialipetalae) CHAMBERS. W. W. B.S., Ph.D., Asst Prof. — Dept of Anat., School of Med.. Univ. of Pennsylvania, PHILADELPHIA 4, Pa., U.S.A. (no data received over some years) CHANG, C. M.S., Ph.D. — Zool. Dept, State Univ. of Iowa, IOWA CITY, Iowa, U.S.A. a. Sex determination by steroid hormones. (Anura) h. Parabiosis and sex differentiation. Xenopus (Anura) c. Inheritance of polymely. Bufo (Anura) CHANG KO B.Sc. — Lab. of Developm. Physiol., Inst, of Exper. Biol., Acad. Sinica, 865 Chang Ning Rd, SHANGHAI, China, (no data received on Nov. 1=*, 1952) CHANG, K. P. B.Sc. — Lab for Developm. Physiol.. Inst, of Exper. Biol.. Acad. Sinica, 865 Chang Ning Rd. SHANGHAI, China, (no data received on Nov. 1^*, 1952) CHANG M. C. Ph.D. — Worcester Foundation for Exper. Biol, 222 Maple Ave, SHREV/SBURY. Mass., U.S.A. a. Physiology of fertilization and cleavage. Transplantation of blastocysts. Development of ova at different stages in relation to ovulation time of recipients. Oryctolagus cuniculus (Rodentia) b. Cleavage of unfertilized ova. Mustela putorius [uro L. (Carnivora) c. Development of blastocyst. Bos taurus (Artiodactyla) d. Fertilizabilitv. Oryctolagus cuniculus (Rodentia) 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 (no embryological work in progress) 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) CHEN, J. M. — Strangeways Research Lab., Wort's Causeway, CAM- BRIDGE. England (U.K.) a. The effect of insuHn on the development of skeletal rudiments cultivated in vitro, (in collaboration with members of the Sir William Dunn Inst, of Biochemistry. Cambridge Univ.) CHENEY, R. H. B.S., A.M., S.M., Sc.D., Prof. — Dept of Biol., Brook- lyn College, Bedford Ave and Ave H. BROOKLYN 10, N.Y., U.S.A. a. Retardation effect of dimethylated xanthines on development. Arbacia punctulata (Echinoidea) b. Comparative effect of di- and trimethylated xantines on development. Arabacia punctulata (Echinoidea) c. Theophylhne, theobromine, and caffeine effects on fecundity and deve- lopment. Rattus norvegicus albinus (Rodentia) Cheney 20 Clay d. Effect of di- and trimethylated xanthines on root tip growth. Allium (Liliaceae) e. Effect of di- and trimethylated xanthines on enzymatic activity. CHENG CHU YING B.Sc. — Lab. of Developm. Physiol., Inst, for Exper. Biol.. Acad. Sinica, 865 Chang Ning Rd, SHANGHAI, China. (no data received on Nov. 1^', 1952) CHIANG TIEN CHI B.Sc. — Lab. of Developm. Physiol., Inst, for Exper. Biol., Acad. Sinica, 865 Chang Ning Rd, SHANGHAI, China. (no data received on Nov. 1^*, 1952) CHIRIBOGA, J. M.D. — Central de Investig., Minist. de Salud Publ. de la Nacion, Bolivar 1128, BUENOS AIRES, Argentina, a. Action of ACTH on development. Bu[o arenarum (Anura) h. Mucopolysaccharides in development. Bu[o arenarum. (Anura) CHOW, P. S. B.Sc. -- Dept of Biol., Nat. Univ. of Chekiang, HANG- CHOW, China. (no data received over some years) CHU. J. B.Sc. — Lab. of Developm. Physiol., Inst, for Exper. Biol., Acad. Sinica, 865 Chang Ning Rd, SHANGHAI, China. (no data received on Nov. \^K 1952) CHUANG HSIAO HUI F.I.I. E., Dr rer. nat., Dr rer. nat. habil. — Lab. of Developm. Physiol., Inst, of Exper. Biol., Acad. Sinica, 865 Chang Ning Rd, SHANGHAI, China. (no data received on Nov. 1^', 1952) CHURCH, G. A.B. — Dept of Biol. Sci., Stanford Univ.. STANFORD, Cal.. U.S.A. a. The growth of graft hybrids. (Amphibia) CICADA, Miss M. Dott. Sci. Biol. — 1st. di Zool. e Anat. Comp., Univ. di Milano, Via Celoria 10, MILANO, Italia, a. Protein changes in embryonic development ( Echinodermata, Amphibia and Aues) CITTERIO, P. Grad. stud. — 1st. di Zool. e Anat. Comp., Univ. di Milano, Via Celoria 10. MILANO, Italia. a. Determination in early development (Echinodermata and Amphibia) CLANCY, W. — Biol. Dept. Univ. of Oregon, EUGENE, Ore.. U.S.A. (no data received over some years) CLARK, E. R. A.B., M.D.. Sc.D., Prof. Emer. — Dept of Anat., School of Med.. University of Pennsylvania, PHILADELPHIA 4, Pa. U.S.A. (no data received on Nov. \^K 1952) CLARK, H. B.A., Ph.D., Prof. — Dept of Zool., Univ. of Connecticut. STORRS, Conn., U.S.A. (no data received on Nov. l^\ 1952) CLAVERT, J. Dr en Med., Dr es Sc, Prof. — Inst. d'Embryol., Fac. de Med., 1 Place de I'Hopital, STRASBOURG, France, a. Egg formation. (Role of female hormone in vitellogenesis). Columba, Anas and Gallus (Aves) CLAYTON— FREEDMAN, Mrs R. M. M.A. — Inst, of Anim. Genet., Univ. Dept of Genet., King's Buildings, West Mains Rd, EDINBURGH 9, Scotland (U.K.) a. Studies of differentiation by immunological and other techniques. Triton alpestris (Urodela) b. Studies of a locus in a highly inbred hne by immunological and aHied techniques: The loci pink eye. luxate, and agouti in CBA mice and albino in an inbred strain of this laboratory. Mus musculus (Rodentia) Cle 21 Con CLEAT. N. D. B.Sc. — Dept of Genet., The University, GLASGOW W. 2. Scotland (U.K.) a. Post-embryonic growth and development. Scheloribates laevigatas (Koch) (Oribatidae. Acarina. Arachnoidea) CLELAND. K. W. M.B.. B.S. — Dept of Histol. and Embryol., Univ. of Sydney, SYDNEY, N.S.W.. Australia, a. Carbohydrate metabolism and phosphorylation during fertilization and cleavage. Psammechinus miliaris. Echinus esculentus (Echinoidea) h. Effect of heavy metals on fertilization and cleavage. Psammechinus miliaris. Echinus esculentus (Echinoidea) CLEMENT, A. C. Ph.D., Prof. — Dept of Biol., Emory University, ATLANTA. Ga. U.S.A. a. Factors determining the cleavage pattern: experimental analysis. Ilyanassa obsoleta (Gastropoda) b. Localization of morphogenic factors: experimental analysis. Ilyanassa obsoleta (Gastropoda) COHN S. A. B.S.. M.S.. Ph.D. — Univ. of Tennessee, Fac. of Biol. Sci., Med. Units Div.. MEMPHIS 3, Tenn., U.S.A. a. The development of glands of ectodermal origin. Mus musculus (Roden- tia) , Gallus domesticus (Aves) b. Cytological. cytochemical and histochemical studies on the initiation of secretory activity in developing ectodermal glands. Mus musculus COLLISTER, Miss R. M. Physician — Anat.-Embryol. Lab. of the Univ. of Leyden. Fac. of Med.. Wassenaarseweg, Boerhaavekwartier, LEIDEN. Holland. (no data received on Nov. l^S 1952) COLOMBO. G. DrBiol.Sci. — 1st. di Zool. e Anat. comp., Fac. di Sci., Via Loredan 6, PADOVA, ItaUa. a. Chromosomes in early development. (Amphibia) h. Effects of hormones on cleavage and early development. (Amphibia) c. Caryometry in spermatogenesis. ( Arthropoda) COLWIN A. L. Ph.D., Prof. — Dept of Biol., Queens College, Flushing 67, L.I., NEW YORK. N.Y., U.S.A. a. Fertilization reaction. Saccoglossus (Enteropneusta) (in collaboration with Mrs L. H. COLWIN) b. Normal and experimental development. Saccoglossus (Enteropneusta) (in collaboration with Mrs L. H. COLWIN) c. Effect of certain chemicals on develooment. Mogula, Ciona and Styela (Tunicata, Urochordata) COLWIN, Mrs L. HUNTER Ph.D., Prof. — Dept of Biol.. Queens Coll., Flushing 67, L.I., NEW YORK, N.Y., U.S.A. a. Fertilization reaction. Saccoglossus (Enteropneusta) (in collaboration with A. L. COLWIN) b. Normal and experimental development. Saccoglossus (Enteropneusta) (in collaboration with A. L. COLWIN) c. Study of the development. Thyone (Holothuria) CONINCK. L. A. P. De Dr Sc, Prof. — Lab. voor Zool.. Afd. Morphol., Univcrsiteitstraat 14. GENT, Belgie. a. Action of alkaline growth-promoting beef anterior pituitary extract on regeneration of limbs and tail, with special consideration of ribonucleic acid and alkaline phosphatase. (Urodela) (in collaboration with. Fr. DIERCKS and J. M. DENUCfi) Conk 22 Csa CONKLIN. E. G. Dr, Prof. (Emer.) — Princeton Univ., PRINCETON, N.J., U.S.A. COPENHAVER. W. M. Dr, Prof. — Coll. of Phys. and Surg.. Columbia Univ.. 632 West 168th Str., NEW YORK City, N.Y.. U.S.A. (no data received) CORDEIRO, A. R. Dr — Lab. de Genet., Fac. de Filos., Avenida Joao Pesoa, PORTO ALEGRE, Brasil, S. America. (no data received on Nov. 1^', 1952) CORNER, G. W. F.I.I. E.. A.B.. M.D., D.Sc, Prof. — Dept of Embryol., Carnegie Inst, of Washington, Wolfe and Madison Strs, BALTIMORE 5, Md, U.S.A. a. Histology of uterus and ovaries in reproductive cycle. Chiefly Macacus rhesus (Primates) h. Physiology of uterine muscle. (Mammalia) COSTELLO, D. P. F.I.I.E., Ph.D., Prof. — Dept of Zool., Univ. of North Carolina, CHAPEL HILL, N.C., U.S.A. (no data received on Nov. 1,^*,- 1952) COTRONEI, G. F.I.I. E., Dott.. Prof. — 1st. di Anat. comp. dell'Univ., Fac. di Sci., Via Borelh 50, ROMA. Itaha. (no data received on Nov. 1^^ 1952) COULOMBRE, A. J. B.S., M.S. — Dept of Biol., The Johns Hopkins Univ., Charles and 34th Strs, BALTIMORE 18, Md, U.S.A. a. Experimental analysis of the developmental aspects of visual chemistry Gatlus domesticus (Aves) COUNCE, Miss S. J. B.A., M.A. — Inst, of Animal Genet., Univ. Dept of Genet., King's Buildings. West Mains Rd, EDINBURGH 9, Scotland (U.K.) a. Effect of three rudimentary alleles: fused, Lyra and deep orange, on embryonic development. Drosophila melanogaster (Insecta) COURRIER, R. Prof. — Lab. de Morphol. exper. et Endocrinol., Coll. de France. Place Marcelin Berthelot. PARIS Ve, France. (no data received over some years) CRARY. D. D. — Roscoe B. Jackson Memorial Lab., Box 558, BAR HARBOR, Me., U.S.A. (no data received on Nov. 1^', 1952) CRELIN, E. S. Ph.D. — Anat. Dept. School of Med., Yale Univ. NEW HAVEN 11, Conn., U.S.A. a. Physiological projection of the retinal quadrants on the optic tectum. Triturus v. viridescens (Urodela) (in collaboration with L. S. STONE) b. Excision and rotation of the developing optic tectum and subsequent visual behavior. Amby stoma punctatum (Urodela) (in collaboration with L. S. STONE) CRISP, D. J. Ph.D. — Marine Biol. Stat.., Univ. Coll. of N. Wales, BANGOR, N. Wales (U.K.) a. Breeding and development. Balanus hameri, B. porcatus, Clithamelus stel- latus ^British Cirripedia) CSAPO. A. I. M.D. — Dept of Embryol., Carnegie Inst, of Washington, Wolfe and Madison Strs, BALTIMORE 5, Md, U.S.A. a. Physiology of uterine muscle, including developmental physiology. Sus scrofa and Lepus cuniculus (Mammalia) h. Biochemistry of the myometrium. (Mammalia) c. Energetics of the myometrium. (Mammalia) Cza 23 Dav CZAPIK, Miss A. D.Sc. — Zool. Dept of the Jagellonian Univ., St Anne 6, KRAKOW (Cracow), Poland, a. Development of the heart. Agelastica alni L. (Coleoptera) DAINTY, J. — Inst, of Anim. Genet., Univ. Dept of Genet.. King's Buil- ding's, West Mains Rd. EDINBURGH, Scotland (U.K.) a. Studies on the permeability of undifferentiated and differentiated tissues, using radioactive tracers. Various species (Amphibia) (in collaboration with Miss E. M. DEUCHAR) DALCQ, A. M. F.I. I.E., M.D.. Prof. — Lab. d'Anat. et d'Embryol.. Fac. dc Med. de I'Univ., 97 Rue aux Laines, BRUXELLES. Belgique. a. Cytochemistry of early stages of development. (Rodentia and Insecti" vora) (in collaboration with coworkers) b. Cytochemistry in various buds (limbs, tail, genitalia). c. Regulation in blastula and gastrula stage. (Urodela and Anura) (in col- laboration with coworkers) DALTON. H. C. Ph.D., Asst Prof. — Dept of Zool., New York Univ.. NEW YORK, N.Y.. U.S.A. a. Gene action controlling development of pigmentation in white and dark strains. Ambystoma mexicanum (Urodela) h. Role of embryonic pituitary activity in development of pigment patterns. Ambystoma mexicanum (Urodela) DAMAS, H. F. C. Dr Sc. Agr. Zool. — Inst, de Zool. Ed. Van Beneden, Dept Morphol. des Chordes, Fac. des Sci., 22 Quai Ed. Van Beneden. LIEGE, Belgique. a. Etude descriptive et comparative du developpement. Pettomyzon matinus, Lampetra fluviatilis et L. planed (Cyclostomata, Pisces) DAN, Mrs J. C. Ph.D. — Embryol. Section, Dept of Biol.. Fac. of Sci.. Tokyo Metropolitan Univ., Meguro-ku, TOKYO, Japan. a. Experimental study of syngamy. (Echinoidea) b. Electron-microscope observation of spermatozoa under various experi- mental conditions. (Echinodetmata, Mollusca, Annelida) DAN, K. Ph.D., Rigaku Hakushi, Prof. — Embryol. Section, Dept of Biol., Fac. of Sci.. Tokyo Metropolitan Univ.. Meguro-ku. TOKYO, Japan. a. Research into causes of form change in early development, from preclea- vage through metamorphosis. (Echinoidea) b. Birefringence studies of dividing eggs. (Echinoidea) c. Mitotic spindle isolation and analysis. (Echinodea) D'ANCONA, U. Prof. — 1st. di Zool. e Anat. comp., Fac. di Sci., Via Loredan 6. PADOVA. Itaha. a. Differentiation of the gonad. (Vertebrata, esp. Pisces) DANKMEIJER, J. Med. Dr, Prof. — Anat.-Embryol. Lab of the Univ. of Leyden, Fac. of Med.. Wassenaarseweg, Boerhaavekwartier, LEIDEN, Holland. (no data received on Nov. !«', 1952) DATKOWNA. H. Dr — Zaktad Anat. Porownawczej U.J. Im. H. Hoyera. sw. Anny 6. KRAKOW. Poland. (no data received on Nov. 1*'. 1952) DAVIES. F. M.D., D.Sc. Prof. — Dept. of Anat., Fac. of Med.. Univ. of Sheffield. SHEFFIELD. England (U.K.) a. Histological studies of conducting system of the heart. (Mammalia) (in collaboration with E. T. B. FRANCIS. Dept of Zool.) Davies 24 Deu b. Comparative electrocardiographic studies. (Mammalia and Aves) (in collaboration with E. T. B. FRANCIS, Dept of Zool.) DAWSON. A. B. A.B., Ph.D., D.Sc, Prof. — Biol. Lab's. Harvard Univ.. Divinity Ave. CAMBRIDGE 38. Mass.. U.S.A. (no data received over some years) DE CESARE, Miss I. Ph.D. — 1st. di Anat. Comp.. Via Belmeloro S, BOLOGNA (103). Italia, a. Action of antimitotics on early development. (Amphibia) (in collabora- tion with P. PASQUINI) DEKKER. Miss A. Med. Dra — Anat.-Embryol. Lab. of the Univ.. Fac. of Med.. Wassenaarseweg, Boerhaavekwartier. LEIDEN. Holland, (no data received on Nov. 1^^ 1952) DELMAS. A. Prof.Agr. — Lab. des Travaux Anatomiques, Fac. de Med., 15 Rue Ecole de Medecine. PARIS V^, France. a. Developpement de I'encephale. Homo (Primates) b. Developpement anormal de I'encephale et des organes des sens. Mus rattus (Rodentia) DENT. J. N. A.B.. Ph.D.. Assoc. Prof. — Miller School of Biol.. Univ. of Virginia. CHARLOTTESVILLE. Va. U.S.A. a. Uptake of inorganic iodine during metamorphosis and effects thereof. Rana pipiens (Anura) b. The use of tadpoles in assay of secretions from hypophyseal tumors of the rat. Rana pipiens (Anura) and Mus norvegicus albicans (Rodentia) DENUCE. J. M. Lie. zool. sci. — Lab. voor Zool.. Afd. Morphol., Universi- teitstraat 14, GENT. Belgie. a. Action of alkaline growth-promoting beef anterior pituitary extract on regeneration of limbs and tail, with sf^cial consideration of ribonucleic acid and alkahne phosphatase (Urodelaj (in collaboration with L. A. P. DE CONINCK and F. DIERCKS) b. Cytochemical and biochemical analysis of factors involved in protein syn- thesis (spinning glands) during larval and post-larval development (nucleic acids, proteolytic enzymes, phosphatases). Bombyx mori L. (Lepidoptera) DEROUX. G. Lie. es Sc. — Lab. d'Embryogenie comp.. Coll. de France. Place Marcehn Berthelot. PARIS Ve. France. (no data received on Nov. 1**, 1952) DESCLAUX. P. Prof.agr. — Lab. d'Embryol.. Fac. de Med.. 15 Rue Ecole de Med.. PARIS V^. France. a. Embryologie descriptive du cerveau et specialement du diencephale. Homo ? (Primates) et Mus rattus (Rodentia) b. Influence teratogene des intoxications maternelles. Homo 9 (Primates) et Mus rattus (Rodentia) DETWILER, S. R. Dr. Prof. — Dept of Anat.. Coll. of Phys. and Surg.. Columbia Univ., 630 West 168th St. NEW YORK City. N.Y.. U.S.A. (no data received) DEUCHAR. Miss E. M. B.A., Ph.D. — Inst, of Anim. Genet., Univ. Dept of Genet., King's Buildings, West Mains Rd, EDINBURGH 9, Scot- land (U.K.) a. Effect of extirpation or addition of undetermined gastrula material on definitive size of tissues, particularly somites. Triton alpestris (Urodela) (in collaboration with C. H. WADDINGTON) Deuchar 25 Dor b. Influence of the duration and direction of invagination of the organiser on the nature of neural tissue induced. Triton alpestris (Urodela) (in collaboration with C. H. WADDINGTON) c. Histochemical studies on ribonucleoprotein content of non-competent ectoderm transplanted tot presumptive neural plate region. Triturus alpestris (Urodela) (in collaboration with C. H. WADDINGTON) d. Studies on the permeability of undifferentiated and differentiated tissues, using radioactive tracers. Various species (Amphibia) in collaboration with J. DAINTY) e. Attempts to isolate proteins and protein derivatives from embryos by ionophoresis. Various species (Amphibia) (in collaboration with G. G. SELMAN) DEVILLERS, Ch. Dr es Sc. — Lab. d'Embryogenie comp., Coll. de France, Place Marcelin Berthelot, PARIS Ve, France, (no data received on Nov. 1^^ 1952) DIDING. S. Fil.mag. — Embryol. Dept, Zool. Inst, of the Univ. of Lund, LUND, Sweden. a. Study of the embryology. (Brachiopoda) DIERCKS. Fr. — Lab. voor Zool., Afd. Morphol., Universiteitstraat 14, GENT, Belgie. a. Action of alkaUne growth-promoting beef anterior pituitary extract on regeneration of limbs and tail, with special consideration of ribonucleic acid and alkaline phosphatase. (Urodela) (in collaboration with L. A. P. DE CONINCK and J. M. DENUCE) DODD, J. M. B.Sc. — Gatty Marine Lab., The University. ST ANDREWS. Fife. Scotland (U.K.) (no data received on Nov. 1^*. 1952) DOHRN, P. M.D., Ph.D. — Zool. Station, NAPLES, Italy. a. Analysis of the cytoplasmic fraction of the egg having ,,antifertih2in" pro- perties. Arbacia lixula, Paracentrotus lividus, Sphaerechinus granulans, Psammechinus microtuberculatus (Echinoidea) h. Neurosecretory aspects of the eyestalks. (Crustacea) c. Analysis of the interactions between jelly-coat substance and egg pro- teins. (Echinodermata) (in cooperation with A. MONRO Y) DOHRN. R. Dr, Prof. — Zool. Station, NAPLES, Italy, (no data received) DOLLANDER, A. Dr, Delegue Agr. — Lab. d'Histol., Dept d'Embryol.. Fac. de Med., 31 Rue Lionnois, NANCY (Meurthe 6 Moselle), France. a. Etude des proprietes mecaniques des differents elements du cortex de I'oeuf. (Amphibia) (en collaboration avec Miss G. LABADIE) b. Regulation de I'oeuf. (Amphibia) (en collaboration avec P. LEVAN DIEM) c. Etude des proprietes de permeabilite du cortex de I'oeuf. (Amphibia) (en collaboration avec P. J. MELNOTTE) DONALDSON, J. C. Ph.B., M.D.. Prof. — Dept of Anat.. School of Med.. Univ. of Pittsburgh, PITTSBURGH 13. Pa. U.S.A. a. Studies on the developing pancreas. Homo (Primates) DONGEN, A. van — Zool. Lab. der Rijks Univ., Janskerkhof 3, UTRECHT. Holland, a. Development of the saccus vasculosus. Scijllhim stellare (Selachii) DORP van VLIET, N. O. van B.Sc. — Zool. Lab. der Rijks Univ., Jans- kerkhof 3, UTRECHT, Holland. Dorp 26 Edds a. Experimental investigation into the existence of a new imaginal ring in the mid part of the hindgut. Drosophila melanogaster Meigen (Insecta) (in collaboration with J. FABER and F. H. SOBELS) DREYER. Miss M. V. B.Sc. — Dept of Zool.. Univ. of O.F.S., BLOEM- FONTEIN, South Africa, a. The epithelio-neural bodies. Gallus bankiva (Aves) DRISCOLL. W. T. A.B., M.S. — Dept of Zool., Univ. of CaUfornia, BER- KELEY 4. Cal., U.S.A. a. The effect of sucrose on the determination of the hypophysis. Hyla regilla (Anura) DURANTE. Miss M. Dr — 1st. di Zool., Via Archirafi 18, PALERMO, Italia, a. Xenoplastic gill transplantations. (Amphibia) h. Investigations on overripe eggs. (Ascidiae, Urochordata) DUSHANE. G. Ph.D. Yale 1934, Prof. — Dept of Biol.. Stanford Univ., PALO ALTO, Cal., U.S.A. a. The regulation in size of spinal ganglia after removal of one-half of the primordium of the neural crest. Ambystoma punctatum (Urodela) b. Pigmentary relations in transplantations between white and black animals. Ambystoma mexicanum (Urodela) DUYKER— De BEER, Mrs A. S. B.Sc. — Anat.-Embryol. Lab. der Rijks Univ., Oostersingel 69. GRONINGEN, Holland, a. Development of paraphysis cerebri. Scyllium canicula (Selachii) EAKIN, R. M. F.I.I.E., A.B.. Ph.D.. Prof. — Dept of Zool., Univ. of Cahfornia, BERKELEY 4. Cal.. U.S.A. a. Development of the pituitary. Study of independent or dependent diffe- rentiation of the partes buccales and pars nervosa of the pituitary. Hyla regilla (Anura) h. Studies in protein metabohsm of the embryo. IV — Peptides; V — Microbiological assay of animo acids. Rana pipiens and Hyla regilla (Anura) (in collaboration with W. E. BERG and P. B. KUTSKY) EALES. Miss N. B. D.Sc. (London) — Dept of Zool.. University. REA- DING. Berkshire. England (U.K.) a. Foetal anatomy. Monodon monoceros (Odontoceti, Cetacea) EAYRS, J. T. B.Sc, Ph.D. — Dept of Anat.. The Med. School. Birmingham Univ.. Edgbaston. BIRMINGHAM 15, England (U.K.) a. Influence of thyroidectomy and inanition on the development of the central nervous system (Rodentia) EBERT. J. D. Ph.D. — Dept of Zool.. Indiana Univ., BLOOMINGTON. Ind.. U.S.A. a. Investigating the ontogeny of the enzyme tyrosinase, by immunological techniques. Gallus domesticus (Aves) b. Investigating the time and manner of origin, and role of vitamins in the early blastoderm. Gallus domesticus (Aves) c. Investigating the mechanism of protein synthesis in the embryo, with special reference to the proteins of cardiac muscle. Gallus domesticus (Aves) d. Analysis of mechanism of synthesis of specific antigens of spleen. Gallus domesticus (Aves) EDDS. M. v.. Jr B.A.. M.A.. Ph.D.. — Arnold Biol. Lab.. Brown Univ., PROVIDENCE 12, R.I.. U.S.A. Edds 27 Endo a. Study of factors influencing the collateral regeneration of intact axons in partially denervated muscles. Miis norvegicus albinus (Rodentia) h. Study of factors influencing the diameter of nerve fibers. Mus norvegicus albinus (Rodentia) EDE, D. A. B.Sc, M.S. — Inst, of Animal Genet., Univ. Dept of Genet.. King's Buildings, West Mains Rd, EDINBURGH 9, Scotland (U.K.) a. Study of the developmental effects of embryonic lethal mutations. Dro- sophila melanogaster (Diptera, Insecta) EDGAR, G. W. F. Physician — Anat-Embryol. Lab. der Rijks Univ.. Janskerkhof 3, UTRECHT, Holland, a. Investigations into the lipid changes in the central nervous system of the growing animal, compared with the normal and pathological development of the myelin sheath. Lepus cuniculus (Rodentia) EDWARDS. L. F. B.A., M.Sc, Ph.D., Prof. — Dept of Anat., Ohio State Univ., COLUMBUS 10. Ohio, U.S.A. (no data received over some years) EEDEN, J. A. van D.Sc. — Dept van Dierk., Potchefstroom Univ., POT- CHEFSTROOM, Suid-Afrika. (no data received on Nov. 1^*, 1952) EGMOND, Miss M.T.C. van M.Sc. — Hubrecht Lab., Internat. Embryol. Inst.. Janskerkhof 2, UTRECHT, Holland. — Lab. d'Anat. et d'Embryol.. Fac. de Med. de I'Univ., 97 Rue aux Laines. BRUXELLES. Belgique. a. Preparing the catalogue of the Central Embryological Collection of shdes and ale. material of the Hubrecht Laboratory. (Mammalia) (in collabo- ration with Miss E. L. M. J. HOESSELS) b. Investigations on centrifuged oocytes. Rattus novergicus (Rodentia) ELBERS. P. F. M.Sc. — Zool. Lab. der Rijks Univ.. Janskerkhof 3. UTRECHT, Holland. a. Freeze-drying of tissue preparations for electron microscopy, (finished) b. Electron microscopical investigation on differentiation, insemination, growth and differentiation of the egg. Limnaea stagnalis (Gastropoda) ELOFF. F. C. D.Sc. — Zool. Inst., Fac. of Sci., Univ. of Pretoria, PRE- TORIA, South Africa, a. Further studies on the chondrocranium. Galago senegalensis (Primates) h. On the presence of pineal cartilages in the chondrocranium of a mammal, (Rodentia) EL SHATOURY. H. B.Sc.Hon. (Cairo) — Inst, of Anim. Genet.. Univ. Dept of Genet.. King's Buildings, West Mains Rd, EDINBURG 9, Scotland (U.K.) a. Survey of pupal lethals. Drosophila melanogaster (Diptera) ELSHOUT, Miss A. M. Physician — Anat.-Embryol. Lab. of the Univ. of Leyden. Fac. of Med., Wassenaarseweg, Boerhaavekwartier, LEIDEN, Holland, (no data received on Nov. 1^*, 1952) ENDO. Y. M.Sc. — Biol. Lab., Keio Univ., Hiyoshi, Kohoku, YOKO- HAMA, Japan. a. A chemical study of the processes of fertihzation membrane formation. (Echinoidea) b. Electron microscopical study of the fertihzation membrane. (Echinoidea) Eng 28 Far ENGELBRECHT, D. van Z. M.Sc. — Zool. Inst., Univ. of Stellenbosch, STELLENBOSCH, S. Africa, a. Cranial ontogenesis. Pyromelana sp. (Aves) ENGLANDER. H. Dr med. et rer.nat. — Zool. Inst, der Univ. Koln. Ker- penerstr. 13, K5LN-LINDENTHAL, Deutschland. a. Regionalspezifische Induktion. (Urodela) ESCH, G. J. van B.Sc. — Zool. Lab. der Rijks Univ., Janskerkhof 3, UTRECHT, Holland, a. Cytology of the pineal region. Torpedo ocellata (Selachii) 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. Gallus domesticus (Aves) EYAL— GILADl Mrs H. M.Sc. — Hebrew. Univ.. JERUSALEM. Israel. — Hubrecht Lab., Internal. Embryol. Inst., Janskerkhof 2. UTRECHT, Holland, a. Experimental analysis of the development of neural differentiation ten- dencies during gastrulation and neurulation. (Amphibia) EYMANN. H. — Zool. Inst, der Univ. Bern. Sahlistr. 8, BERN, Schweiz. a. Neuralchimaren. Triton x Bombinator (Amphibia) (in Zusammenarbeit mit F. BALTZER) EYRIES, Ch. DrM. — Lab des Travaux Anatomiques. Fac. de Med., 15 Rue Ecole de Medecine, PARIS V^. France. a. Developpement de I'encephalc et des nerfs craniens. Homo (Primates) (en collaboration avec R. BISS) b. Oreille interne et complexe acoustico- facial. Homo (Primates) (en collo- boration avec R. BISS) FABER, J. B.Sc. — Hubrecht Lab.. Internat. Embryol. Inst., Janskerkhof 2, UTRECHT, Holland. a. Description of the development of the pattern of chromatophores. Xeno- pus laevis (Anura) (Normal Table) b. Histology of the ring gland of the lethal mutant ,, lethal non evaginated." Drosophila melanogaster Meigen (Insecta) (in collaboration with Mrs. J. FLORSCHOTZ-de WAARD and F. H. SOBELS) FANKHAUSER. G. F.I.I.E.. Ph.D., Prof. — Dept of Biol., Princeton Univ., PRINCETON, N.J., U.S.A. a. Cytological study of polyploidizing effect of heat and cold on fertihzed eggs, and of parthenogenetic cleavage induced bij heat and cold treatment of unfertilized eggs. Triturus viridescens (Urodela) b. Study of effects of triploidy on development of gonads. Triturus virid. c. Study of the reactions of diploid and triploid larvae and metamorphosed animals to pituitary hormones. Triturus viridescens (Urodela) d. Thyroidectomy in diploid and triploid embryos. Effects of thiourea, etc. Triturs viridescens (Urodela) e. Study of progeny of triploid. tetraploid and other heteroploid individuals. Ambystoma mexicanum (Urodela) (in collaboration with R. R. HUM- PHREY) FARINELLA— FERRUZZA, Mrs N. Dr — 1st. di Zool.. Via Archirafi 18, PALERMO, Italia, a. Xenoplastic tail transplantations. (Amphibia) h. Transplantation of lithium-treated blastomeres upon a normal germ. (Ascidiae. Urochordata) Fau 29 Fitz FAURfi FRfiMIET. E. F.I. I.E.. Dr, Prof. — Coll. de France, Place Mar- celin Berthclot, PARIS Ve. France. (no data received) FAUTREZ, J. C. M.D., Prof. — Lab. of Anat., Fac. of Med., Univ. of Gent. Bylokekaai 1. GENT, Belgium, (no data received on Nov. 1^*, 1952) FAUTREZ— FIRLEFYN. Mrs N. J. — Lab. of Anat., Fac. of Med.. Univ. of Gent, Bylokekaai 1, GENT, Belgium, (no data received on Nov. 1*', 1952) FELDMAN. M. M.Sc. — Dept of Zool.. The Hebrew Univ., JERUSALEM. Israel. (no data received on Nov. 1^'. 1952) FELL Miss H. B. F.I. I.E.. Dr — Strangeways Research Lab., Wort's Cau- seway, CAMBRIDGE, England (U.K.) a. The effect of vitamin A on organ cultures in vitro, (in collaboration with Sir Edward MELLANBY) FEREMUTSCH. K. Dr Med. — Hirnanat. Inst, der Psychiatr. Univ. klinik, Med. Fak., Waldau. BERN, Schweiz. a. Endhirnentwicklung, speziell der Rindf> und Bauplan. Mas (Rodentia), Homo (Primates) b. Comparative development of the brain. Cricetus auratus (Rodentia) (in collaboration with F. STRAUSS) FERRIS, W. R. Doct. Cand. — Dept of Zool., Univ. of Chicago, CHI- CAGO 37, III, U.S.A. (no data received on Nov. 1^', 1952) FICQ. Mrs A. A. Lic.en Sci.Biol. — Lab. de Morphol. anim.. Univ. hbre 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 locahsation du Lithium dans des embryons. Ambystoma, Pleurodeles (Amphibia) FILOGAMO, G. Dr — Inst, of human Anat., Corso Massimo d'Azegho 52. TORINO. Italy, a. Histogenesis of the nervous cells of the sympathetic nervous system of the intestinal tract. Ovis (Ruminantia) h. Histochemical changes in the differentiating cells of the optic lobe follo- wing removal of the optic vesicle. Gallus domesticus (Aves) FISCHBERG, M. Dr Phil. (Zurich), M.A. (Oxford) — Dept of Zool, and Comp. Anat., Univ. Museum. OXFORD, England (U.K.) a. Experimental heteroploidy and parthenogenesis. Heteroploid hybrids — developmental potentialities and expression of species characters, sex determination. Triton alpestris and Triton palmatus (Urodela) b. Study of induced heteroploidy — Viabihty of polyploid embryos. Em- bryology of polyploid embryos. Mus musculus (Rodentia) c. Sex differentiation and experiments on sex reversal. Mus musculus (Rodentia) FISK, A. M.Sc. — St Mary's Hosp., Med. School. Norfolk Place, Padding- ton. LONDON W. 2, England (U.K.) (no data received on Nov. 1^*, 1952) FITZGERALD, L. R. Ph.D. — Univ. of Tennessee. Fac. of Biol. Sci., Med. Units Div., MEMPHIS 3, Tenn.. U.S.A. a. Effects of temperature on neonates and development of thermoregula- tory mechanisms. Mus musculus (Rodentia) Fitzgerald 30 Frank b. Metabolic characteristics of the neonatal period. Mas Musculus (Rodentia) FLEXNER, Louis B. B.S., M.D.. Prof. — Dept of Anat.. Univ. of Pennsyl- vania. School of Med., PHILADELPHIA 4, Pa, U.S.A. a. Enzyme activities in fetal liver and cerebral cortex, Cavia cobaya (Rodentia) h. Placental transfer using radioisotopes. Cavia cobaya (Rodentia) (data of 1951) FLORSCHuTZ-de WAARD. Mrs J. — Zool. Lab. der Rijks Univ., Jans- kerkhof 3, UTRECHT, Holland, a. Histology of the ring gland of the lethal mutant ., lethal non-evaginated". Drosophila melanogaster Meigen (Insecta) (in collaboration with J. FABER and F. H. SOBELS) FONSECA SACARRaO, G. da DrSc. — Museu e Lab. Zool. d. Fac. d. Ci., Univ. d. Lisboa, LISBOA, Portugal, a. Early development (germ-layers, gastrulation, blastokinesis, shell-gland). (Octopoda and other Cephalopoda) h. Comparative study of development, mainly the ontogenetic evolution of adaptability of the embryo to its yolk-organ. (Decapoda and Octopoda, Cephalopoda) FONTANA, J. S. — Central de Investig., Minist. de Salud Publ. de la Nacion, Bolivar 1128, BUENOS AIRES, Argentina. a. Action of ACTH on development. Bu[o arenarum (Anura) b. Mucopolysaccharids in development. Bufo arenarum (Anura) c. Induction of lens by normal eyecup. Bufo arenarum (Anura) FORD, P. B.Sc, Ph.D. (Lond.). Prof — Dept of Zool., Univ. of British Columbia, B.C., VANCOUVER. Canada. a. Distribution of nucleic acids in transplants and explants of gastrulae. G alius (Aves) b. The development of the gastric gland. Castor canadensis (Rodentia) FOX, H. B.Sc, Ph. D. — Dept of Zool, and Comp. Anat., Univ. Coll. Lon- don, Gower Str., LONDON W.C. 1, England (U.K.) a. Compensatory hypertrophy in the pronephros after unilateral pronephrec- tomy. Quantitative and quaUtative investigation. Triturus cristatus car- nifex (Urodela) b. The inductive effect of the pronephric duct on the development of the mesonephros. Triturus cristatus carnifex (Urodela) FRANCESCHINI, M. M.D. — Inst, of human Anat., Fac. of Med., Corso Massimo d'Azeglio 52, TORINO, Italy. (no embryological work in progress) FRANCIS, E. T. B., B.Sc Ph.D., Dr — Dept of Zool.. Univ. of Sheffield, SHEFFIELD, England (U.K.) a. The development and histogenesis of the conducting system of the heart. Ovis (Ruminantia) (in collaboration with F. DA VIES, Dept of Anat.) b. Comparative electrocardiographic studies (Mammalia and Aves) (in collaboration with F. H. DAVIES, Dept of Anat.) FRANCOIS. Y. Lie. es Sc. — Lab. d'Embryogenie comp.. Coll. de France, Place Marcehn Berthelot, PARIS Ve, France. (no data received on Nov. 1^*, 1952) FRANK, G. H. M.Sc. — Zool. Inst.. Univ. of Stellenbosch, STELLEN- BOSCH. S. Africa. Frank 31 Gen a. Cranial ontogenesis. Struthio (Aves) FRASER, A. S. B.Sc. M.Sc Ph.D. — Animal Genetics Section, C.S.I.R.O., Univ. of Sydney. SYDNEY. N.S.W., Australia. a. Epigenetics of the fleece. Ovis ammon (Artiodactyla) b. Skin graft incompatibility reactions. Development and morphology of hair and skin mutants. Mus musculus (Rodentia) FRICK. H. Dr med. — Dr Senckenberg. Anat. Inst., Med. Fak. der Univ.. Ludwig Rehnstr. 14, FRANKFURT/Main Sud, Dcutschland. a. Placenta. Roussetus and Rhinolophus (Chiroptera) b. The development of the skull. Myotis myotis ( Microchiroptera) FROUD. M. D. B.Sc. — Wye Coll., Univ. of London. ASHFORD. Kent. England (U.K.) a. Variation in aortic arches in late embryos. Gallus domesticus (Aves) b. Study of ductus arteriosus in relation to hatching. Gallus domesticus (Aves) GAILLARD, P. J. Med. Dr. Prof. — Lab. for Exper. Histol.. Fac. of Med.. Univ. of Leyden. Wassenaarseweg, Boerhaavekwartier, LEIDEN, Holland, a. Developmental potencies of the fetal germinal epithelium in explants. Homo (Primates) h. Primary genesis of thyroid follicles in explants and factors governing colloid formation. Gallus domesticus (Aves) GALINSKY, I. Dr — Dept of Pathol.. Coll. of Med.. Baylor Univ.. 1200 M.D. Anderson Blvd. Texas Med. Center. HOUSTON 5. Tex.. U.S.A. (no data received on Nov. 1^', 1952) GALLERA, J. Ph.D. — Inst. d'Histol. et d'Embryol.. Fac. de Med.. LAU- SANNE. Suisse. a. Changes in competences of ectoderm during gastrulation. (Urodela) h. Progressive modifications of ectodermal reactivity and cellular permea- bility. Triturus alpestris (Urodela) GALLIEN, L. Dr es Sc. Prof. — Lab. de Biol. anim. (P.C.B. section II). Fac. des Sci., Univ. de Paris, 12 Rue Cuvier, PARIS Ve. France; the following investigations are carried on at the Institute: a. Organogenese sexuelle. (Amphibia) b. Heteroploidie experimentale. (Amphibia) c. Regeneration. Xenopus lacvis (Anura) d. Organogenese sexuelle. (Insectivora) e. Viviparite. (Pisces) GARRETT, F. D. Ph.D.. Prof. — Dept of Anat.. Ohio State Univ.. COLUMBUS 10, Ohio. U.S.A. (no data received over some years) GEELEN. Miss J. F. M. — Zool. Lab. der Rijks Univ.. Janskerkhof 3, UTRECHT. Holland, a. Osmoregulation in the uncleaved egg. Limnae stagnalis (Gastropoda) GEIGY. R. Dr. Prof. — Schweiz. Tropeninst., Socinstr. 57. und Zool. Anstalt der Univ.. Rheinsprung 9. BASEL, Schweiz. (no data received on Nov. 1^*. 1952) GENNARO Jr. J. F. Ph.D.. Asst Prof. Biol. — Coll. of Pharmacy. St John's Univ., 96 Schermerhorn Street. BROOKLYN 2. N.Y., U.S.A. a. Effects of direct irradiation of the pituitary. Rattus norvegicus albinus (Rodentia) Gi 32 Godi GILBERT, Miss C. M.Sc, D.Sc. (Rand) — Anat. Dept. Med. School. Univ. of Witwatersrand, Hospital Hill, JOHANNESBURG, S. Africa, a. Study of the embryology. Papio ursinus (Anthropoidea) h. Congenital malformations. Rattus rattus norvegicus (Rodentia) (in collaboration with J. GILLMAN) c. A further report on the experimental production of congenital anomalies. Rattus rattus norvegicus (Rodentia) (in collaboration with J. GILL- MAN) d. Pregnancy in fourteen baboons. Papio ursinus (Cercopithecidae, Pri- mates) (in collaboration with J. GILLMAN) GILLMAN. J. D.Sc. M.B.. Ch.B, (Rand), Prof. — Physiol. Dept, Med. School. Univ. of Witwatersrand, Hospital Hill, JOHANNESBURG. S. Africa. a. Congenital malformations. Rattus rattus norvegicus (Rodentia) (in col- laboration with Miss C. GILBERT) b. Further study on the experimental production of congenital malforma- tions. Rattus rattus norvegicus (Rodentia) (in collaboration with Miss C. GILBERT) c. Pregnancy in fourteen baboons. Papio ursinus (Cercopithecidae, Prima- tes) (in collaboration with Miss C. GILBERT) GIRAUD, Miss D. Preparatrice Temp. — Lab. d'Embryogenie comp., Coll. de France, Place Marcehn Berthelot, PARIS Ve, France. (no data received on Nov. 1**, 1952) GIROUD, A. F.I.I.E., Prof. — Lab. d'Embryol., Fac. de Med., 15 Rue Ecole de Med.. PARIS V^, France, a. Developpement de I'encephale et specialement du diencephale. Etude structurale en rapport avec I'apparition des fonctions. Mus rattus (Rodentia) h. Recherches sur I'influence teratogene des avitaminoses maternelles. Mus rattus (Rodentia) c. Recherches sur I'influence teratogene des intoxications maternelles. Mus rattus (Rodentia) d. Etude des cas teratologiques individuels. Homo (Primates) e. Developpement anormal de I'oeil. Mus rattus (Rodentia) GLENISTER, T. W. M.B., B.S. — Anat. Dept, Charing Cross Hosp. Med. School, 62 Chandos Place, LONDON W.C. 2, England (U.K.) a. Development of the urethra. Homo (Primates) GLIMSTEDT, G. Med. Dr, Prof. — Tornblad-Inst. of comp. Embryol., Bis- kopsgatan 7, LUND, Sweden. a. Development of the ceruminous glands. (Aves) (team-work with P. HALL) b. Methods for studying the histochemistry of the foetus with isotopes. (Mammalia) (team-work with R. HAKANSSON) GLOOR, H. Ph.D., P.D. — Zool.-vergl. Anat. Inst., Naturw. Fak., Univ. Zurich, Kiinstlergasse 16, ZURICH 6, Schweiz. (no data received on Nov. 1^', 1952) GODINA, G. Prof. — Inst, of human Anat., Corso Massimo d'Azeglio 52, TORINO, Italy, a. Development of neurons and glia cells in the hyppocampus cortex. Ovis (Ruminantia) h. Development of the regulatory mechanism of the blood flow in large arteries. Sus scro/a (Artiodactyla) Godl 33 Grant GODLEWSKI. H. G. Med. Dr — Inst, of Histol. and Embryol.. Med. Acad.. GDANSK. Poland, (no data received over some years) GONTCHAROFF, Miss M. Dr es Sci. — Lab. d'evolution des etres orga- nises. Fac. des Sci. de Paris. 105 Boulevard Raspail, PARIS Vie, France, a. Regeneration du SNC et action de la lumiere. Lineus ruber. Linens san- guineus (Nemertini) GOODHART, C. B. M.A.. Ph.D. — Dept of Zool.. Downing Street, CAMBRIDGE. England (U.K.) a. Resemblances between regenerative and embryonic growth, and malig- nant tumours. (Amphibia) b. Physiology of development. (Vertebrata) c. Embryonic induction. Triturus (Urodela) d. Cleavage of the egg cell. (Invertebrata and Vertebrata) GOODMAN, D. B. B.S. — Dept of Biol. Sci.. Univ. of Pittsburgh, PITTS- BURGH 13, Pa, U.S.A. (no data received over some years) GOSZWALD, K. Dr Phil., Dr habil.rer.nat.. Prof. — Inst, fiir Angewandte Zool. der Univ., Naturw. Fak., Rontgenring 10, WuRZBURG, Deutschland. a. Embryologische Studien. Formica tufa u.a. (Formicidae, Hymenoptera) h. Determination der Ameisen-Kasten. Formica rufa, Lasius niger u.a. (For- micidae, Hymenoptera) c. Parthcnogenese. (Formicidae, Hymenoptera) d. Kiinstliche Begattung. (Lepidoptera, Coleoptera, Hymenoptera) GOTHIE, Miss M. M. C. S. M.D. — Lab. d'Hormonol. et de Cytol., Ecole Pratique des Hautes Etudes, PARIS; en sejour Lab. de Morphol. anim. de I'Univ. hbre de Bruxelles, 1850 Chaussee de Wavre, BRUXELLES- Auderghem, Belgique. a. Etude des substances tensioactivcs sur la morphogenese embryonnairc par microinjection dans de jeunes gastrulae. (Amphibia) b. Etude des injections de noyau.x et derives des nucleines dans de jeunes gastrulae. (Urodela) GOTO, T. M.A. — Biol. Lab., Keio Univ., Hiyoshi, Kohoku, YOKO- HAMA, Japan, a. Studies on the influence of the pterin substances upon development. Bombyx rnori (Lepidoptera) , Rana nigromaculata (Anura) GRABOWSKI, C. T. B.S.. Western Reserve U., Cleveland, Ohio — Dept of Biol., The Johns Hopkins Univ.. Charles and 34th Strs, BALTIMORE 18, Md. U.S.A. a. Mechanism of action of sex hormones in producing sex reversal. Gallus domesticus (Aves) GRANT. Ph. B.S.. M.A.. Ph.D. — Deot of Zool.. Fac. of pure Sci.. Colum- bia Univ.. NEW YORK 27, N.Y., U.S.A. a. Phosphate metabolism in oocytes with radioactive phosphorus. Rana [usca (Anura) b. Phosphate metabolism in gastrulae-halves with radioactive phophorus. Ambystoma punctatum (Urodela) c. Phosphate metabolism during regeneration. Tubularia crocea (Hydroi- dea) d. Locahzation of phosphate turnover in gastrulae. Rana pipiens (Anura) Grau 34 Gru GRAUMANN. W. Dr Med. — Anat. Inst, der Univ., Burgstr. 51, GoT- TINGEN, Deutschland. a. Histotopographie der Knochenentstehung im Bindegewebe. Homo (Primates) b. Histogenese des Subfornicalen Organs. Mus musculus and Cricetus auratus (Rodentia) c. Polysaccharide im embryonalen Organismus. Mus musculus und Cricetus auratus (Rodentia) GREEN, Mrs E. U. Ph.D. — Lankenau Hosp. Res. Inst, and Inst, for Cancer Res.. Burholme Ave, Fox Chase, PFilLAPELPHIA 11, Pa, U.S.A. a. Morphological, cytological and cytochemical studies of the effects of carcinogen-protein conjugates on cleavage and early development. Rana (Anura) GREEN, S. H. M.B., Ch.B. — Dept of Anat., The Med. School, Birmingham Univ., Edgbaston, BIRMINGHAM, England (U.K.) a. The study of oogenetic function ( Anthropoidea) , Mustela putorius furo L. (Catnivora) GREGG, J. R. Ph. D. — Dept of Zool., Fac. of pure Sci., Columbia Univ., Broadway and 116 Str., NEW YORK 27, N.Y., U.S.A. a. Metabolism of normal and hybrid gastrula explants. Rana pipiens and Rana pipiens x Rana sylvatica (Anura) GREULICH, R. C. — Dept of Anat., McGill Univ., MONTREAL, Quebec, Canada, a. The development of bones and teeth as shown by radioautographs with the help of radio-phosphorus and radio-carbon. (Vertebrata) (in collabo- ration with C. P. LEBLOND) GRIGNON, G. — Lab. d'Histol., Dept d'EmbryoL, Fac. de Med., 31 Rue Lionnois, NANCY (Meurthe & Moselle), France, a. Developpement de I'hypophyse. (Aves) GROBSTEIN, C. Ph.D. — Developmental Physiol. Unit., Nat. Cancer Inst.. BETHESDA, Md, U.S.A. a. Time and mechanism of neural cytodetermination. b. Morphogenesis and histogenesis of the salivary gland in vitro and on reimplantation. Mus musculus (Rodentia) c. Effects of mechanical and physiological disaggregation of tissues on their stability of cell type. Mus musculus (Rodentia) GRODZInSKI. Z. Prof. — Zaklad Anat. Porownawczej U. J. im. H. Hoyera, sw. Anny 6, KRAKOW, Poland. a. Physico-chemical properties of the yolk. (Chelonia) and Gallus (Aves) b. Heart rate and temperature. Salmo (Teleostei) c. Morphology and some physico-chemical properties of the yolk. Geoclemys reevesi (Chelonia) d. Influences of vagus nerve upon the heart rate at different stages. Salmo (Teleostei) e. Influence of temperature upon the isolated heart's rate of embryos. Salmo (Teleostei) f. Development of the blood vessels in the tail of embryos. Salmo (Teleostei) GRUENWALD, P. M.D. — Beth-El Hospital, Linden Boulevard and Rockaway Parkway. BROOKLYN 12. N.Y.. U.S.A. Gruenwald 35 Haas a. Embryonic development of selenium-induced malformations. Gallus domesticus (Aves) b. Systematic investigation of current cases of prenatal disease and malfor- mation in autopsy material (Part of ..Brooklyn Survey of Neonatal Pathology"). Homo (Primates) GRUNEBERG. H. Ph.D., M.D.. D.Sc — Dept of Genetics, Univ. Coll. London, Gower Str.. LONDON W.C. 1. England (U.K.) a. Developmental genetics of the skeleton; effects of major genes (conge- nital hydrocephalus, undulated, shaker with syndactylism and others). Development and genetics of spina bifida with tail twist. Mas miisculus (Rodentia) GRONTHAL, E. Dr — Hirnanat. Inst, der Psychiatr. Univ. klinik, Med. Fak., Waldau, BERN Schweiz. a. Hirnentwicklung: Bauplan von Zwischenhirn und Endhirn. Gallus (Aves), Mus (Rodentia) und Homo (Primates) GUARDABASSI, Miss A. Dr — Inst, of comp. Anat., Via Giovanni Gio- htti 34, TORINO, Italy. a. Study of the course and connections of the retinal fibers following rota- tion of the eye anlage. Bufo vulgaris and Rana esculenta (Anura) b. Autoplastic interchange of the eye anlages (left to right and viceversa) to study the course and arrangement of the retinal fibers. Rana esculenta, Bufo vulgaris (Anura) c. Influence of thyroxine and thymus on hme sacs of tadpoles. Rana dal- matina (Anura) GUBBAY, Miss V. B.Sc. Honours — Dept of Zoology, University of the Witwatersrand, Milner Park, JOHANNESBURG, South Africa, a. Early embryology. Eremitalpa granti (Insectivora) GUSTAFSON. G. S. Fil.mag. — Zootom. Inst.. Univ. of Stockholm. 116 Drottninggatan. STOCKHOLM. Sweden. a. Ontogeny of the skull. (Gadidae and Acanthopterygii, Teleostei) GUSTAFSON. T. Fil.Dr — Wenner-Grens Inst, for experimental Biology, Norrtullsgatan 16. STOCKHOLM Va., Sweden. a. Continued studies on the protein chemistry of normal and hthium- treated developing eggs (Studies on peptides and enzymes). Psammechi- nus miliaris and other spec. (Echinoidea) b. Continued studies on the ..dorsoventral" (oral-aboral) organization of the unfertillized egg. Echinocardium cordatum and other spec. (Echi- noidea) c. Studies on mitochondria and mitochondrial distribution in developing eggs. Psammechinus miliaris (Echinoidea) GUYeNOT, E. Dr Med., Dr Sc. — Inst, de Zool. et Anat. comp., Univ. de Geneve, Rue de Candolle. GENfiVE. Suisse. (no data received over some years) GYLLENSTEN. L. J. W. Med. lie. — Embryol. Dept, Histol. Inst.. Karo- Hnska Inst., Solnavagen 1, STOCKHOLM 60, Sweden. (no data received on Nov. 1^', 1952) HAAS, G. — Zool. Inst, der Univ., Katharinenstr. 20, FREIBURG i. Brsg., Deutschland. a. Entwicklung der Sehleistung. (Lepidoptera; Culicidae, Diptera) (gemein- sam mit H. LuDTKE und P. BUTZ) Had 36 Hall HADORN, E. F.I.I. E., Dr Phil.. Prof. — Zool.-vergl. Anat. Inst.. Naturw. Fak., Univ. Zurich, Kiinstlergasse 16, ZURICH 6, Schweiz. (no data received on Nov. 1^*, 1952) HAFFEN, Miss K. Lie. es So. — Lab. de Zool. de la Fac. des Sci. et Lab. d'Embryol. et Teratol. exper. du C.N.R.S., Inst, de Zool. et de Biol, gen., 12 Rue de I'Universite, STRASBOURG, France, a. Etude du developpement et de la regression du mesonephros. Gallus (Aves) h. Recherches sur la differenciation in vitro des gonades embryon- naires. (Avcs) (en collaboration avec Et. WOLFF) c. Recherches sur les besoins nutritifs des gonades embryonnaires en culture in vitro. (Aves) HAGET, A. Lie. es Sci. — Fac. des Sci. de Bordeaux, 40 Rue Lamartine, TALENCE (Gironde), France, a. Analyse experimentale des processus d'induction dans le developpe- ment. Lepidoptera (Coleoptera) h. Analyse experimentale de la morphogenese de la gonade embryonnaire. Leptinotarsa (Coleoptera) HaGQVIST. G. Prof. — Embryol. Dept, Histol. Inst., Karolinska Inst., Solnavagen 1, STOCKHOLM 60, Sweden, (no data received on Nov. 1^*, 1952) HAGSTRoM, B. E. B.A. — Wenner-Grens Inst, for experimental Biology, Norrtullsgatan 16. STOCKHOLM Va., Sweden, a. Studies in cytology and development. (Echonoidea) HAIJE. Miss S. C. A. — Zool. Lab. der Rijks Univ., Janskerkhof 3, UTRECHT. Holland. a. Analysis of lithium action. Limnae stagnalis (Gastropoda) (in collabo- ration vv^ith D. BOSSCHAERT, Miss C. H. M. BRAAT, Miss A. H. LYESEN, I. H. W. NICOLAI, Miss A. J. PARIS, Chr. P. RAVEN, F. van RIJCKEVORSEL and Miss L. G. de VRIES) HAINES. R. W. M.B., B.S.. D.Sc. — Dept of Anat., Fac. of Med., Univ. of Sheffield, SHEFFIELD, England (U.K.) a. Development of the knee joint. Homo (Primates) HAKANSSON, R. Tandlakare — Tornblad-Inst. of comp. Embryol., Bis- kopsgatan 7, LUND, Sweden. a. Methods for studying the histochemistry of the foetus v.ath isotopes. (Mammalia) (team-work v/ith G. GLIMSTEDT) HALE. L. J. Ph.D. — Dept of Zool., Univ. of Edinburgh, West Mains Rd, EDINBURGH 9, Scotland (U.K.) a. The early development of the scleral bones, with special reference to the differentiation of the osteoblasts. Gallus domesticus (Aves) HALL, E. K. Ph.D., D.Sc. — Dept of Anat., School of Med., Univ. of Louisville. 101 West Chestnut Str.. LOUISVII/E 2, Ky. U.S.A. a. Intrinsic contractility in the embryonic mammalian heart and its parts. Mus norvegicus albinus (Rodentia) b. Developmental abnormalities of the fetal eye after various experimental procedures. Mus norvegicus albinus (Rodentia) HALL. P. — Tornblad-Inst. of comp. Embryol., Biskopsgatan 7. LUND, Sweden. a. Development of the ceruminous glands. (Aves) (in team-work with G. GLIMSTEDT) Hall 37 Hardy HALL. T.S. Ph.D., Prof. — Dept of Zool.. Washington Univ., Lindell and Skinker Aves. ST LOUIS 5, Mo., U.S.A. (no data received on Nov. 1'', 1952) HAMA, T. M.A., Dr, Asst Prof. — Biol Lab., Keio Univ. Hiyoshi, Kohoku, YOKOHAMA. Japan. a. Morphogenetical and chemical analysis of the organizer. Triturus pyrrho- gaster (Urodela) b. Studies on the influence of the pterins and their like upon the develop- ment in various animals. (Arthropoda, Pisces, Amphibia etc.^ HAMBURGER, V. F.LLE.. Ph.D.. Prof. — Dept of Zool., Washington Univ., Lindell and Skinker Aves. ST LOUIS 5, Mo., U.S.A. a. Neuro-embryology. Gallus domcsticus (Aves) (in collaboration with Miss R. LEVI-MONTALCINI) HAMILTON. H. L. Ph.D., Prof. — Dept of Zool. and Entomol., Div. of Sci., Iowa State Coll., AMES, Iowa, U.S.A. a. Experiments on the visceral pouches to ascertain their derivatives. Gallus domesticus (Aves) b. 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 (U.K.) a. Investigation on the growth and histology of the placenta in situ from the third month until term. Homo (Primates) (in collaboration with J. D. BOYD. Cambridge) b. Growth and atresia of the ovarian folhcles. Mustela putorius [uro L. (Carnivora) (in collaboration with R. J. HARRISON, London) c. The development for the first seven days of pregmancy. Cricetus cvicetus (Rodentia) d. Placentation. (Cervidae) (in collaboration with R. J. HARRISON, London) HAMMOND, W. S. Ph.D., Prof. — Dept of Anat.. School of Med., State Univ. of New York. SYRACUSE 10. N.Y., U.S.A. a. Development of the autonomic nervous system. Gallus domesticus (Aves) (in collaboration with C. L. YNTEMA) b. Differentiation of sensory neurons. Gallus domesticus (Aves) c. Development of the thymus. Gallus domesticus (Aves) d. Effects of sulfa drugs on the embryo. Mus musculus (Rodentia) (in collaboration with C. L. YNTEMA) HANSON, Miss E. J. Ph.D. — M.R.C. Biophysics Res. Unit. King's Coll.. Strand, LONDON W.C. 2. England, (no data received over some years) HARDER, W. Dr rer.nat. — Max-Planck-Institut fiir Meeresbiologie, Abt. Fischereibiologie, Anton-Dohrn-Weg, WILHELMSHAVEN, Deutsch- land (Brit. Zone), a. Postembryonale Entwicklung, insbesondere die Umwandlungen des Ver- dauungsapparates wahrend der Metamorphose. Vergleichende Unter- suchungen inncrhalb einer Familie. Clupea harengus, C. sprattus, C. piU chardus, Engraulis encrasicholus u.a. (Clupeidae, Teleostei) HARDY, Miss M. H. M.Sc. Ph.D. — Div. of Animal Health and Produc- tion, C.S.I.R.O.. McMaster Animal Health Lab., Parramatta Rd.. Glebe, SYDNEY, N.S.W.. Austraha. (Guest-worker from C.S.I.R.O., Wool Hardy 38 Harr Biol. Lab.. 17 Randle St. SYDNEY. N.S.W.) a. Induction of hair follicle formation. Mus musculus and Ovis (Mammalia) b. Pigmentation processes in skin and hair tissue culture. Mus musculus (Rodentia) c. Relation of dermis to epidermis in differentiation of skin and hairs by in vivo and in vitro techniques. Mus musculus (Rodentia) d. Histochemistry of hair follicle development in vivo and in vitro — nucleic acids, phosphatases, sulphydryl groups. Mus musculus and Ovis (Mammalia) e. Analysis of causes of pattern and density of hair folhcles in skin. Ovis (Artiodactyla) HARKMARK. W. Cand.med. — Anat. Inst.. Univ. of Oslo. OSLO, Nor- way. a. Morphological and experimental investigation on the pontine and inferior ohvary nuclei. Gallus domesticus (Aves) h. Experimental investigation of factors influencing the morphogenesis of the inferior olive and pons. Gallus domesticus (Aves) HARRIS, M. Ph.D., A.B., Prof. — Dept of Zool.. Univ. of Cahfornia. BER- KELEY 4, Cal., U.S.A. a. Utilization of sugars by heart fibroblasts in dialyzed media. Gallus (Aves) b. Bicarbonate as an essential growth factor for heart fibroblasts in dialyzed media. Gallus (Aves) c. Growth factors in alcoholic extracts of embryos. Gallus (Aves) HARRISON. R. G. F.I.I.E.. M.D., Ph.D., Sc.D.. L.L.D.. Prof. (Emer.) — Osborn Zool. Lab.. Yale Univ.. NEW HAVEN 11. Conn.. U.S.A. (no data received on Nov. 1^*, 1952) HARRISON, R. G. M.A.. D.M. — Dept of Anat.. Univ. of Liverpool, LIVERPOOL. England (U.K.) a. The dependence of spermatogenesis on the vascularization of the testis. (Mammalia) b. The importance of the epididymis and its vascularization for spermato- genesis. (Mammalia) (in collaboration with E. W. MACMILLAN) c. The study of a presomite embryo showing an early stage of the secon- dary yolk-sac. Homo (Primates) HARRISON, R. J. M.A.. D.Sc. M.B.B.Chir. — Anat. Dept, London Hosp. Med. Coll.. Turner St, LONDON E. 1., England (U.K.) a. Early development. (Mammalia) h. Changes in the ovary. (Mammalia) c. Growth and atresia of the ovarian follicles. Mustela putorius furo L. (Carnivora) (in collaboration with W. J. HAMILTON) d. Placentation and changes in reproductive tract. (Cervidae) (in collabora- tion with W. J. HAMILTON) e. Changes in reproductive tract and placenta. (Pinnipedia, Carnivora) (in collaboration with L. HARRISON MATTHEWS) f. Distribution of radio-potassium in placenta and uterus. (Rodentia, Car- nivora) HARRISON MATTHEWS. L. D.Sc. — c/o The Zool. Soc. of London, LONDON. England (U.K.) a. Changes in reproductive tract and placenta. (Pinnipedia, Carnivora) (in collaboration with R. J. HARRISON) Hart 39 Hem HARTUNG, E. W. Ph.D. (Harvard Univ), Assoc. Prof. — Dept of Zool.. Univ. of Rhode Island, KINGSTON, R.I., U.S.A. a. Factors influencing tumor incidence. A study of the developmental, envi- ronmental and genetic factors operative in the development of so-called ,, melanin tumors". Drosophila melanogaster (Insects) HARTWIG, H. Dr Phil. — Zool. Inst, der Univ. Koln. Kerpenerstr. 13, KOLN-LINDENTHAL, Deutschland. a. Einfluss von Thyroxin auf fruhe Entwicklungsstadien. (Amphibia) b. Osteogene Substanzen, Wirkung von Organfragmenten und -extrakten. HARVEY, Mrs E. BROWNE F.I.I.E., A.B., M.A., Ph.D. — 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- nodermata) h. Monograph, including classified compilation of all experimental work. Arabacia punctulata (Echinoidea) HARVEY, E. B. B.S. — Dept of Zool., Univ. of CaUfornia, BERKELEY 4, Gal.. U.S.A. a. The effects of high hydrostatic pressure coupled with centrifugation on development of eggs. (Invertebrata and Anamnia) HAYASHI, Y. M.A. (Rigakushi) — Biol. Inst.. Fac. Sci., Nagoya Univ., Chigusa-Ku. NAGOYA, Japan. a. Regional induction through heterogeneous inductors. Triturus pyrrho- gaster (Amphibia) b. Biochemical and histological studies of oogenesis. Triturus pyrrhogaster (Amphibia) (in collaboration with S. OS AW A) HAYES, E. R. Ph.D., Prof. — Dept of Anat., Ohio State Univ., COLUM- BUS 10, Ohio, U.S.A. (no data received over some years) HEATH, H. D. Ph.D. — Dept of Biol. Sci., Stanford Univ., STANFORD, Cal., U.S.A. a. Blastema formation in limb regeneration. (Amphibia) HEAYSMAN, Miss J. E. M. B.Sc, Ph.D. — Dept of Embryol., Univ. Coll. London, Gower Str., LONDON W.C. 1, England (U.K.) a. Cinematographic study of cell relations in tissue culture. Gallus domestic cus (Aves) (in collaboration with M. ABERCROMBIE) HECKERMAN R. O. M.S. — Univ. of Pittsburgh, PITTSBURGH, Pa, U.S.A. (no data received on Nov. 1^', 1952) HEILBRUNN. L. V. Ph.D., Prof. —Dept of Zool., Univ. of Pennsylvania, PHILADELPHIA 4, Pa. U.S.A. (no data received over some years) HEIM, W. G. A.B., M.S. — Dept of Zool., Univ. of Cahfornia. LOS ANGELES 24, Cal.. U.S.A. a. Electrophoresis of serum of developing embryo. Gallus domesticus (Aves) HEIMANN, H. Dr Med. — Hirnanat. Inst, der Psychiatr. Univ.-khnik, Med. Fak., Waldau, BERN, Schweiz. a. Endhirnentwicklung. (Teleostei) HEMMINGS, W. A. B.A. — Dept of Zool., Univ. Coll. of North Wales, BANGOR, Caernarvonshire. N. Wales (U.K.) a. Study of the immunological relations of mother and foetus. (Mammalia) Hen 40 Hert HENDERSON— PHILLIPS, Mrs M. B.Sc. Ph.D. — Dept of Zool.. Univ. Coll. of North Wales, BANGOR, Caernarvonshire, N. Wales (U.K.) a. Immunological relations of mother and young. Oryctolagus cuniculus (Rodentia) HENKE, K. F.I.I.E., Dr Phil., Prof. — Zool. Inst, der Univ. Gottingen. Mathem.-Naturw. Fak., Nikolausbergerweg 75. GoTTINGEN, Deutschland. a. Embryonale und post-embryonale Entwicklungsgeschichte. Carausius morosus (Phasmida, Insecta), Corixa spec. (Hemiptera) (mit Mit- arbeitern) b. Entwicklungsphysiologie. Drosophila mel. (Diptera), Ephestia kiihniella (Lepidoptera), Anas boschas (Aues) (mit Mitarbeitern) c. Genetik. Drosophila mel. (Diptera), Ephestia kiihniella (Lepidoptera) (mit Mitarbeitern) HENLEY, Miss C. M.A., Ph. D. — Dept of Zool., Univ. of North Carolina, CHAPEL HILL. N.C.. U.S.A. (no data received on Nov. 1^*, 1952) HENZEN, W. — Zool. Inst, der Univ. Bern, Sahlistr. 8, BERN, Schweiz. a. Augenentwicklung und Epidermisderivate der Mundregion in Chimaren. Triton X Bombinatot (Amphibia) (in Zusammenarbeit mit F. BALT- ZER) HERLANT— MEEWIS, Mrs H. Dr Zool. — Lab. de Zool., Fac. des Sci., Inst, de Zool. Torley-Rousseau, Univ. libre de Bruxelles, 50 Av. F.D. Roosevelt, BRUXELLES, Belgique. (no data received on Nov. 1^*, 1952) HERMANN, G. — Zool. Inst, der Univ., Katharinenstr. 20, FREIBURG i. Brsg., Deutschland. a. Entwicklung der Sehleistung. Mus rattus (Rodentia) (gemeinsam mit H. LUDTKE) HERRMANN. H. Dr. Prof. — Dept of Pediatrics. Med. School, Univ. of Colorado. 4200 East Ninth Ave, DENVER 7, Col.. U.S.A. a. Chemistry of muscle differentiation. Gallus (Aves) (in collaboration with B. J. NEUKOM) b. Determination and fractionation of nucleoproteins and determination of enzymes in somites from the 2nd tot the 5th day of incubation and in differentiating muscle from the 7th day of incubation to hatching. Gallus (Aves) (in collaboration with B. J. NEUKOM) c. Chemical fractionation of cell nuclei and mitochondria of differentiating muscle. Gallus (Aves) (in collaboration with B. J. NEUKOM) d. Study of differentiation of somites in explants (Spratt technique). Gallus (Aves) (in collaboration with U. ROTHFELS) e. Study of developmental disturbances related to nutritional deficiencies investigated by application of anti-vitamins and anti-animo acids to the intact egg and to explants (somites). (Aves) (in collaboration with L. LUBCHENCO, J. MACKENZIE and U. ROTHFELS) HERTIG, A. T. B.S., M.D., Prof. — Harvard Univ., Med. School Dept of Pathol., 25 Shattuck Str., 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. Development of ova from fertilization to 14 days (first missed menstrual period). Homo (Primates) (in collaboration with J. ROCK) Hertig 41 Hiller b. A morphologic description of 3 segmenting embryos; a 2-ccll tubal ovum. a 50-cell early blastula (4-clays-uterinc), and a 100-cell blastula (43^—5 days uterine). Homo (Primates) (in collaboration with W. J. MULLI- GAN and J. ROCK) HETTIG, R. A. M.D.. Prof. — Dept of Anat.. Coll. of Med.. Baylor Univ., 1200 M.D. Anderson Blvd. Te.xas Med. Center, HOUSTON 5, Tex.. U 5 /^ (no data received over some years) HEUSER C H. F.LLE., Prof. (Emer.) — Dept of Anat., Med. School, Univ. of Georgia, AUGUSTA, Ga. U.S.A. (no data received over some years) HEYN. C. B. M.B. — Anat.-Embryol. Lab. of the Univ., Fac. of Med., Wassenaarseweg, Boerhaavekwartier, LEIDEN, Holland. (no data received on Nov. 1^', 1952) HEYNINGEN, Miss H. E. van — Zool. Lab. der Rijks Univ., Janskerkhof 3, UTRECHT, Holland, a. Cytology of the saccus vasculosus. Scijllium stellate (Selachii) HILL J P. F.I. I.E., F.R.S., Prof. (Emer.) — Dept of Embryol.. Univ. Coll. London. Gower Str., LONDON W.C. 1. England (U.K.). Private addr.: „Kanimbla", DolHs Ave. Finchley, LONDON N. 3, England (U.K.). a. Studies in development, especially placentation. (Mammalia) h. Development of neural crest. (Aues), (Mammalia) HILLEMANN. H. H. B.S.. M.A., Ph.D. — Dept of Zool., Oregon State Coll., CORVALLIS, Ore., U.S.A. a. The pattern of circulation in the placenta. Cricetus auratus (Rodentia) b. Ossification and calcification from postnatal day 8 to the adult condition. Cricetus auratus (Rodentia) c. The morphological relations and development of the bony ear. Cavia porcellatus (Rodentia) d. Flame photometric analysis for Na, K and Ca in the placenta throughout gestation. Cricetus auratus (Rodentia) e. Flame photometric analysis for Na, K and Ca from birth to the adult condition. Cricetus auratus (Rodentia) f. Attempts at regeneration, Mus norvegicus albinus (Rodentia) g. Experimental analysis of the development of the visceral skeleton and columella auris. Gallus domesticus (Aves) h. The effects of supplements of vitamins A and E on the htter size. Cricetus auratus (Rodentia) j. Glycogen studies in the fetal liver (and other tissues). Cricetus auratus (Rodentia) k. Studies on glycogen, fat, iron and the cell types in the placenta. Cricetus auratus (Rodentia) 1. The effects of simple interference on the development and hatchability. Gallus domesticus (Aves) m. Attempts at nutritional prevention and remission from experimentally induced benzpyrene cancer. Cricetus auratus (Rodentia) n. The use of organic chelating agents in the histological study of bone and teeth. Cavia porcellata (Rodentia) o. The histology of the isthmus and uterus in relation to egg shape and egg rotation. Gallus domesticus (Aves) HILLER. S. M.D. — Inst, of Histol. and Embryol.. Med. Acad.. GDANSK. Poland. (no data received over some years) Hin 42 Holmg HINTZSCHE, E. Dr Med., Prof.ord. — Anat. Inst., Buhlstr. 26, BERN, Schweiz. a. Anorganischer Stoffwechsel, Fermentchemische Untersuchungen. Homo and other spec. (Mammalia) b. Experimentelle Studien iiber Zellvermehrung in Gewebekulturen. Ein- wirkung fordernder und hemmender Substanzen. Gallus (Aves), Orijc- tolagus cuniculus (Rodentia) , Homo (Primates) HJELMMAN, G. M. D., Prof. — Dept of Anat., Fac. of Med., Univ. of Helsinki, HELSINKI. Finland, a. The appearance of the mastcells. (Mammalia) HOESSELS, Miss E. L. M. J. — Hubrecht Laboratory, Internat. Embryol. Inst., Janskerkhof 2, UTRECHT. Holland. a. Preparing the catalogue of the Central Embryological Collection of slides and ale. material of the Hubrecht Laboratory. (Pisces) (in collaboration with Miss M. T. C. van EGMOND) HOFF-JORGENSEN, E. Dr Phil. — Inst, of Biochem., Fac. of Med.. Univ. of Copenhagen, JuHane Mariesvej 30, COPENHAGEN 0, Denmark, a. Determination of desoxyribonucleic acid in eggs and embryos, evidence of cytoplasmic desoxyribosides. (Amphibia) (in collaboration with E. ZEUTHEN) HOFFMAN. H. A. B., M.S. — Dept of Zool.. Univ. of Cahfornia. LOS ANGELES 24, Cal.. U.S.A. a. Electrophoresis of hver extracts during development and carcinogenesis, (in collaboration with A. M. SCHECHTMAN) HOGEWONING, C. H. — Lab. for Exper. Histol., Fac. of Med., Univ. of Leyden, Wassenaarseweg, Boerhaavekwartier, LEIDEN, Holland, a. Influence of estrogens on the development and calcification of embryonic endosteal tissue in vitro. Gallus domesticus (Aves) h. Influence of vitamine D3 on the development and calcification of endo- steal bone and cartilage in vitro. Gallus domesticus (Aves) HOGUE. Miss M. J. A.B.. Ph.D.. Assoc.Prof. — Dept of Anat.. School of Med.. Univ. of Pennsylvania. PHILADELPHIA 4, Pa, U.S.A. a. Study of neurons and glia cells from the different parts of the brain, especially from the cerebellum of human fetuses, newborn babes and adult humans. Homo sapiens (Primates) 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) HOLMDAHL. D. E. F.I.I.E.. Med. Dr. Prof. — Anat. Inst., Univ. Uppsala, UPPSALA. Sweden. a. Untersuchungen iiber die friihe Korperentwicklung. (Vettebrata) b. Riickenmarkentwicklung. (Vettebrata) c. Neuralleistenentwicklung und Mesenchymbildung. (Vertebrata) d. Entwicklung der Blutgefasse und des Blutes. (Vertebrata) e. Spina Bifida-Genese. (Vertebrata) f. Teratomgenese. (Vertebrata) g. Probleme der Korperentwicklung. (Amniota) h. Morphogenese des Plexus chorioideus. (Vertebrata) HOLMGREN. N. F. Dr Sc, Prof. (Emer.) — Zootom. Inst.. Univ. of Stockholm, 116 Drottninggatan. STOCKHOLM, Sweden. a. Origin of tetrapods; the limb problem. (Tetrapoda) Holt 43 Hub HOLTER, H. Ph.D. — Cytochem. Dept, Carlsberg Lab., 8 GI. Carls- bergvej, COPENHAGEN Valby, Denmark, a. Enzyme development in embryos. (Echinodermata) h. Study with Cartesian divers of mitotic rhythm in metabolism during cleavage period. (Echinodermata and Amphibia) (in collaboration with E. ZEUTHEN) HOLTFRETER, J. K. F. F.I. I.E., Ph.D.. Prof. — Department of Biology, College of Arts and Sciences, University of Rochester, ROCHESTER 3, N.Y., U.S.A. a. Effects of carcinogens on successive developmental stages of embryos. Amby stoma (Urodela), Rana pipiens and Xenopus laevis (Anura) b. Relationship between size of inductive graft and size and pattern of induction. Ambystoma (Urodela) and Rana (Anura) HOLTZER H. Ph.D. — Dept of Anat.. School of Med., Univ. of Pitts- burgh, PITTSBURGH 13, Pa, U.S.A. a. Development of regional functional properties in the spinal cord, tested by defect and transplantation experiments. (Urodela) h. Selectivity in outhgrowth and terminations of embryonic nerves. (Ver- tebrata) c. Role of the spinal cord in the morphogenesis of the vertebral column. Ambystoma (Urodela) d. Factors influencing the organization of the neural action systems in the brachial spinal cord. Ambystoma (Urodela) HOOKER D. Ph.D., Sc.D. (Hon.), Prof. — Dept of Anat., School of Med.. Univ. of Pittsburgh, PITTSBURGH 13. Pa, U.S.A. a. Study of the physiological responses of fetuses. Homo (Primates) b. Study of the reactivity of the fetus to exteroceptive stimulation. Homo (Primates) HORN E. C. B.S., A.M., Ph.D., Prof. — Dept of Zool., Duke Univ.. DUR- HAM. N.C.. U.S.A. a. Organogenesis during development and changes at metamorphosis. Ichthyomyzon (species undescribed) (Cydostomata, Pisces) h. Tail regeneration in Ammococtes. Ichthyomyzon (Cydostomata, Pisces) HORSTADIUS, S. F.I. I.E., Fil.Dr. Prof. — Zool. Inst.. Uppsala Univ., UPPSALA. Sweden. a. Determination in the egg: Analysis of the gradients and the processes behind them. (Echinoidea) b. Determination within the head. Ambystoma (Urodela) HO TSE YING. Miss B.Sc. — Lab. of Developm. Physiol., Inst, of Exper. Biol.. Acad. Sinica, 865 Chang Ning Rd, SHANGHAI. China. (no data received on Nov. 1^*, 1952) HOWORKA, E. I. M.D., Ph.D. — Klinika Ginekologiczna Poznan, Polna 33, POZNAN, Poland. (no data received on Nov. 1^', 1952) HUBER, W. Dr es Sc. — Lab. de Zool. de la Fac. des Sci. et Lab. d'Embryol. et Teratol. exper. du C.N.R.S., Inst, de Zool. et de Biol. gen., 12 Rue de I'Universite, STRASBOURG, France, a. Developpement de la tete. Etude morphologique et experimentale de developpement de la forme encephalique en rapport avec le crane; cour- bure et redrcssement de la tete; position des yeux. Analyse de races a forme encephahque abcrrante. Gallus domesticus (Aves) Hubl 44 Hunt HUBL H. Drrer. nat. — Zool. Inst, der Univ., Naturw. Fak., Rontgen- ring 10, WORZBURG, Deutschland. a. Einfluss des Colchicins auf die Regeneration. Lumbricus und Tubifex (Oligochaeta) h. Untersuchungen iiber die neurosekretorischen Zellen im Gehirn und deren Einfluss auf die Regeneration. (Lumbricidae, Oligochaeta) HUBLfi, J. Lie. Zool. — Afd. Morphol., Lab. voor Zool., Universiteitstraat 14, GENT, Belgie. (no data received on Nov. I'*'. 1952) HUGOSSON, R. Med. kand. — Tornblad-Inst. of comp. Embryo!., Biskops- gatan 7, LUND, Sweden. a. Development of rhombencephalic nuclei. Mus muscu/us (Rodentia) (team work with S. BENGMARK and B. KaLLeN) HULTIN, J. M. T. Fil.lic. — Wenner-Grens Inst, for experimental Biology, Norrtullsgatan 16. STOCKHOLM Va., Sweden, a. Isotope studies of the metabolism during early development. (Echinoidea) HUMMEL, Miss K. P. Ph.D. — Jackson Memorial Lab., Box 558, BAR HARBOR, Me.. U.S.A. (no data received on Nov. 1^', 1952) HUMPHREY, R. R. F.I.I. E., A.M.. Ph.D., ProL — Dept. of Anat., School of Med., Univ. of Buffalo, 24 High Str., BUFFALO, N.Y.. U.S.A. a. Studies on spontaneous haploidy and polyploidy. Ambystoma mexicanum (Urodela) (in collaboration with G. FANKHAUSER) b. The offspring of polyploids; their chromosome number, mortality, patho- logy etc. Ambystoma mexicanum (Urodela) (in collaboration with G. FANKHAUSER) c. Matings especially of dark 2n x white 2n to obtain haploids (white) to determine whether they are androgenetic or gynogenetic. Ambystoma mexicanum (Urodela) d. Triploid, tetraploid and other heteroploid females are mated with 2n males, and the offspring studied. Ambystoma mexicanum (Urodela) e. Genetic factors in metamorphosis. Ambystoma mexicanum (Urodela) f. Modification of a lethal trait by the genotype of the mother. Ambystoma mexicanum (Urodela) HUMPHREY. Miss T. M.D., Ph.D. — Dept of Anat., School of Med., Univ. of Pittsburgh. PITTSBURGH 13. Pa. U.S.A. a. Further studies on the descending root fibers of the trigeminal nerve in embryos during 7.5 to 8.5 weeks age period. Morphological study based on serially sectioned, pyridine silver impregnated embryos. Correlation of the anatomical findings on embryos with neurological observations and neurosurgical procedures. Homo (Primates) b. Pancreatic developmental studies. Homo (Primates) c. Relation of anoxia to action of different types of reflex arcs and to the observations on fetal behavior. A study deahng with the apphcation of neurophysiological data to fetal behavior studies. (Mammalia) d. Diplomyeha in embryos: cases with one spinal cord located dorsal to the other. Homo (Primates) HUNT. E. L. Ph.D., Prof. — Dept of Biol., Emory University, ATLAN- TA, Ga.. U.S.A. a. Studies on the distribution of certain radio-isotopes in the embryo. Gallus (Aves) Hunt 45 Jaf b. Studies on the distribution of radio-iodine. (Amphibia) ICHIKAWA. A. Rigakushi (M.S.), Rigakuhakushi (Dr). Prof. — Zool. Inst.. Fac. of Sci.. Hokkaido Univ., North 8, West 5. SAPPORO, Japan, a. Histological changes during regeneration. Bdellocephala bninnea and Duqesia gonocephala (Tricladidca, Turbellaria) ICHIKAWA. 'M. Ph.D.. Prof. — Lab. of Embryol. and Exp. Morphol., Zool. Inst.. Dept of Sci.. Kyoto Univ., KYOTO, Japan. a. Hormonal mechanism of metamorphosis. Bombyx mori, Luehdorfia yapo- nica, Dictyoploca japonica (Lepidoptera) (in collaboration with co-workers) b. Development of ears. Triturus pyrrhogaster (Urodela) IKUSHIMA, N. — Lab. of Embryol. and Exp. Morphol., Zool. Inst.. Dept of Sci., Kyoto Univ., KYOTO, Japan, a. Redoxpotential of early embryo. Triturus pyrrhogaster and Rhacophorus schlegelii (A.mphibia) h. Regional specificity of the inductive faculty of the organizer. IMBRIANO, O. — Central de Investig., Minist. de Salud Publ. de la Nacion, Bolivar 1128. BUENOS AIRES, Argentina, a. Mucopolysaccharides in development. Bufo arenarum (Anura) IMMERS, J. Mag.rer.nat. — Wenner-Grens Inst, for experimental Biology, Norrtullsgatan 16. STOCKHOLM Va.. Sweden. a. Biochemistry of fertilization, espec. on carbohydrates metabolism. Echinus esculentus, Echinocardium cordatum, Paraccntrotus lividus, Strongylo- centrotus droeb., etc. (Echinoidea) INCE, Miss F. E. M.Sc. — Dept of Zool.. Bedford Coll.. Regent's Park, LONDON N.W. 1, England (U.K.) a. Study of development. Arion (Pulmonata, Gastropoda) ISHIKAWA, M. M.A. (Rigakushi) — The Sugashima Marine Biol. Stat., Nagoya Univ., SUGASHIMA-MURA, Shima-gun, Mie-ken, Japan, a. Physiological studies on fertilization and parthenogenesis. Strong yiocen- trotus pulcherrimus, Pseudocentrotus dcpressus (Echinoidea) (in colla- boration with M. SUGIYAMA) ISINGS, J. M.Sc. — Vezel Inst. T.N.O.. Mijnbouwstraat 16a. DELFT. Holland. a. Cytochemistry of hair development. (Mammalia) b. Physiology and endocrinology of hair development. Cauia cobaya Marcor and Mus musculus (Rodentia) c. Investigation of hair development by means of radioautography. Mus musculus (Rodentia) IVEY. W. D. M.S. — Dept of Biol.. Emory Univ.. EMORY UNIVER- SITY, Ga, U.S.A. a. Effect of lithium on differentiation. Ilyanassa obsolete (Gastropoda) JACOBSEN. A. A.B. — Dept of Biol. Sci.. Stanford Univ.. STANFORD. Cal., U.S.A. a. Experiments on development of the optic vesicle. (Amphibia) JAFFE, L. F. B.S. — Dept of Embryol.. Div. of Biol.. Cahfornia Inst, of Technol.. PASADENA 4, Cal., U.S.A. a. Study of spawning stimuli. Pelvetia fastigiata, Hcsperophycus harveya- nus (Fucales, Algae) b. Using developing eggs, search for gradient in CO._. output. Pelvetia fastigiata. Hcsperophycus harveyanus (Fucales, Algae) Jag 46 Kal JAGERSTEN, K. G. M. Fil.Dr. Prof. — Zool. Inst.. Uppsala Univ.. UPPSALA, Sweden. a. Larval development. (Polychaeta) JANSEN, J. M.D. — Anat. Inst., Univ. of Oslo, OSLO, Norway. a. Morphogenesis of the rhombencephalon. Balaenoptera physalus (Cetacea) b. Development of the rhombencephalic nuclei. Balaenoptera physalus (Cetacea) JAROS. Mrs R. M. M.D. — Univ. of Chicago, Dept of Zool., CHICAGO 37. 111., U.S.A. (no data received on Nov. 1^^ 1952) JOHNELS, A.G. Phil.Dr — Zootom. Inst., Univ. of Stockholm, 116 Drott- ninggatan, STOCKHOLM, Sweden. a. Development and morphology of the skeleton of the head. (Dipnoi), (Siluridae, Teleostei) JOHNEN, Miss A. G. — Zool. Inst, der Univ. Koln, Kerpenerstr. 13, KOLN-LINDENTHAL, Deutschland. a. Die Wirkungsspezifitat abnormer Induktoren in der Entwicklung (Amphibia) JOHNSON, F. R. M.D., B.Ch., B.A.O. — Dept of Anat., Fac. of Med., Univ. of Sheffield, SHEFFIELD, England (U.K.) a. Fiinctional histology of urinary passages of kidney. (Mammalia) JONES, B. M. D.Sc. — Dept of Zool., Univ., of Edinburgh, West Mains Rd, EDINBURGH 9, Scotland (U.K.) a. Post-embryonic morphogenesis. (Acarina, Arachnoidea) b. Photcreactivation of ultra violet inactivated organisms in relation to diapause and other developmental phenomena. JORDAN. H. Ph.D., M.S., M.A., Prof. — Lab. of Histol. and Embryol.. Dept of Anat.. Coll. of Med., Univ. of Vermont, BURLINGTON. Vt. U.S.A. (no data received over some years) JOST. A. D. Dr Sc, Prof. — Lab. de Biol. anim. du P.C.B.. Fac. des Sci., Univ. de Paris, 7 Rue Cuvier, PARIS Ve, France. Developmental physiology of the fetus, and fetal endocrinology. Orycto- lagus cunicuhis, Mus rattus (Rodentia): a. Hormonal control of sex differentiation (gonads, hypophysis). b. Physiology of the fetal hypophysis, thyroid, adrenals. c. Sexual differentiation studied in vitro (organ culturing experiments). d. Production of limb abnormalities by hormonic treatment. The problem of congenital amputations. KAJISHIMA, T. Rigakushi. Asst Prof. — Biol. Inst., Seikei Univ., Musa- shino-shi. TOKYO, Japan. a. Experimental studies on the mechanism of a blastoderm differentiation. (Crustacea) b. Histochemical investigations on the mosaic eggs. (Crustacea) KALIN, J. Prof. — Zool.-vergl.-anat. Inst, der Univ.. FREIBURG. Schweiz. a. Die Entwicklung des Beckens. Semnopithecus (Anthropoidea) h. Vergleichend embryologische Untersuchung iiber den Tarsus, insbeson- dere der niederen Katarrhinen. (Anthropoidea) c. Die hormonale Beeinflussung der Metamorphose. Xenopus laevis Daudin (Anura) Kalk 47 Kat KALK Mrs M. J. B.Sc. (London) — Dept of Zool.. Univ. of the Witwaters- rand, Milner Park. JOHANNESBURG, South Africa. a. An investigation into the biochemical ontogeny of muscle by an immuno- logical technique. Xenopiis laevis (Aniira) KALLfiN, B. Docent — Tornblad-Inst. for comp. Embryol., Biskopsgatan 7, LUND, Sweden. a. Morphogenetic significance of the ncuromeres. Mus musciilus (Rodentia) b. Development of rhombencephalic nuclei. Mu5 mascu/as (Rodentia) (team work with S. BENGMARK and R. HUGOSSON) c. Influence of anaesthesia on embryonic development. Mus musculus (Rodentia) (team work with B. LINDSKOG) KAMER. J. C. V. d. Dr Sc. — Zool. Lab der Rijks Univ., Janskerkhof 3. UTRECHT, Holland. a. Comparative cmbryological study of pineal cytology. Esox lucius (Teleostei), Rana temp. (Anura) b. Normal development and cytology of the pineal region. Torpedo ocellata and Torpedo marmorata (Selachii) c. Normaldevelopment of the ear. Xenopus /aeui5 (Anura) (Normal Table) d. Normal development and cytology of the saccus vasculosus. Scyllium stellate and Scyllium canicula (Selachii) KANOH, Y. Rigakushi (M.S.), Asst Prof. — Zool. Inst., Fac. of Sci., Hok- kaido Univ., North 8, West 5, SAPPORO, Japan. a. Morpho- and physiological investigations on activation of eggs. Onco- rhynchus keta W. (Teleostei) b. Experimental analysis of fertilization process. Clupea pallasii C. & V. (Teleostei) (in collaboration with R. YANAGIMACHI) KAN TIEN LI B.Sc. — Lab. for Developm. Physiol., Inst, of Exper. Biol.. Acad. Sinica. 865 Chang Ning Rd, SHANGHAI, China, (no data received on Nov. 1^^ 1952) KARCZMAR, A. G. Ph.D. — Georgetown Univ., School of Med., WASH- INGTON 7, D.C., Md, U.S.A. a. The alkaline phosphatase activity in regenerating hmbs. The compa- rison of the activities of this enzyme in dedifferentive, growth and diffe- rentiation stages of regeneration on one hand and in hmb ontogeny on the other. Activities of alkaline phosphatase in experimentally induced chan- ges of regenerative fate. Ambystoma punctatum and opacum (Urodela) b. The effect of antimitotics and carcinogens on regeneration. The effect of nitrogen mustard as compared to that of denervation. The comparison of the effects of these agents during various stages of regeneration, with special emphasis on the effect of carcinogens on dedifferentive stage of regeneration and on experimentally induced exaggerated dedifferentia- tion (regression). Ambystoma punctatum and opacum (Urodela) c. Effect of pharmacological agents during progressive stages of differen- tiation. Change of response to agents acting on central and peripheral system during morphogenesis. Ambystoma punctatum and opacum (Urodela) d. Dissociation of the effects of carcinogens on dedifferentiation, growth and differentiation phase of regeneration. Ambijstoma punctatum and opacum KATAKURA, Y. M.A — Biol. Lab., Keio Univ., Hiyoshi, Kohoku, YOKO- HAMA. Japan, a. Differentiation of the primordial germ cell. Bombyx mod (Lepidoptera) Kav 48 Kil b. The sexual characters of the gynandromorph. Bombijx mori (Lepidop- tera) KAVANAU, J. L. B.S., M.S., Ph.D. — Wenner-Grens Inst, for exper. Biol., Norrtulisgatan 16. STOCKHOLM 23, Sweden. a. The free amino acid, peptide and protein metabolism of normal and lithium-treated developing eggs. Strong ylocentrotus purpuratus, Paracen- trotus liuidus and other species (Endocyclica, Echinoidea) KAWAKAMI, I. D.Sc. — Biol. Inst., Fac. of Sci.. Kyushu Univ.. FUKUOKA, Japan. a. Inductive effect and embryonic field, with special reference to the deve- lopmental mechanism of the cephaHc sensory organs. (Amphibia) h. The metabolic basis of morphogenesis. Bufo vulgaris and Rana nigroma- culata (Anura) c. Mechanism of regeneration. Eisenia faetida and Planaria gonocephala (Plathelminthes) KEMP, N.E. Ph.D. — Dept of Zool, Univ. of Michigan. ANN ARBOR, Mich., U.S.A. a. Synthesis and utilization of yolk during morphogenesis. Rana pipiens and Ambijstoma punctatum (Amphibia) h. Differentiation of viscera and survival of tadpoles with opened body cavities. Rana pipiens (Anura) c. Differentiation and respiration in tadpoles with excised hearts. Rana pipiens (Anura) KENT D E. A.B. — Dept of Zool., Univ., of North Carolina, CHAPEL I-ilLL, N.C.. U.S.A. (no data received on Nov. 1^'. 1952) KERKHOF. Miss. A. M. Physician — Anat.-Embryol. Lab. of the Univ. Fac. of Med.. Wassenaarseweg, Boerhaavekwartier, LEIDEN, Holland. (no data received on Nov. 1*'. 1952) KERR, J. Graham Dr. Prof. (Emer.) — Dalney Veed. ROYSTON (Herts), Barley. England (U.K.) KIENY. Miss M.A. Lie. es Sc. — Lab. de Zool. de la Fac. des Sci. et Lab. d'Embryol. et Teratol. exper. du C.N.R.S., Inst, de Zool. et de Biol. gen., 12 Rue de I'Universite, STRASBOURG, France. a. Recherches sur la morphogenese et les besoins nutritifs des os de carti- lage en culture in vitro. Gallus 'gallus (Aves) b. Problemes relatifs aux causes de I'achondroplasie. Gallus gallus, var. Creeper (Aues) KIESSLING, K.-H. Fil.mag. — Inst, for Zoophysiol., Fac. of Mat.-Nat.Sci., ViUavagen 9, UPPSALA, Sweden, a. Metabolic reactions in egg cells. (Echinoidea) KIHLSTROM, J.-E. Fil.Mag. — Inst, for Zoophysiol., Fac. of Mat.-Nat. Sci., ViUavagen 9. UPPSALA, Sweden, a. The physiology of ripening in spermatozoa. (Mammalia) h. The mechanism of agglutination of spermatozoa. (Mammalia) KILLE, R. A. B.Sc. — Dept of Zool., Univ. of Edinburgh, West Mains Rd, EDINBURGH 9, Scotland (U.K.) a. The early development of the skull bones developing in connection with the sensory line canals. Salmo spp. (Teleostei) b. The first formation and further development of the sensory lines. Salmo spp. (Teleostei) Kin 49 Kol KINDAHL, Miss M. E. Phil.Dr — Zootom. Inst., Univ. of Stockholm. 116 Drottninggatan, STOCKHOLM, Sweden, a. The development of the teeth. (Insectiuora) KING, R. — Dept of Biol. Sci., Stanford Univ., STANFORD, Cal., U.S.A. a. A study of melanophore differentiation, utilizing melanin inhibitors (e.g. phenylthiourea). (Amphibia) KING, T. J. B.S., M.S. — Lankenau Hosp. Res. Inst, and Inst, for Cancer Res., Burholm Ave, Fox Chase, PHILADELPHIA 11. Pa, U.S.A. a. The problem of nuclear differentiation, investigated by means of trans- plantation of embryonic cell nuclei into enucleated eggs. Rana (Anuta) (in collaboration with R. W. BRIGGS) KING, T. S. M.B., Ch.B. — Dept of Anat.. Fac. of Med.. Univ. of Shef- field, SHEFFIELD. England (U.K.) a. Development of face and correlated innervation. Homo (Primates) KLAPPER, C. E. A.B., Ph.D. — Univ. of Alabama. Med. Center. BIR- MINGHAM 5. Alabama, U.S.A. a. Development of the pharyngeal derivatives. Cricetus cricetus (Rodentia) h. Development and structure of salivary glands. Cricetus cricetus (Rodentia) KLOFT, W. Dr rer.nat. — Inst, fiir Angewandte Zool. der Univ., Naturw. Fak., Rontgenring 10, WURZBURG, Deutschland. a. Embryonic development and metamorphosis. Tropinota hirta (Coleop- tera) h. Reduktion der Fliigel und Fliigelmuskulatur bei von Nematoden infi- zierten Tieren. Lasius niger u.a. (Formicidae), Myrmica rubra u.a. (Mytmicinae, Formicidae) und Vespa germanica (Vespidae, Hyme- noptera) c. Abhangigkeit der Entwicklung verschiedener cecidogener Pflanzenlause von der Gallenbildung ( Aphidoidea, Coccidoidea) KNIGHT, Miss P. A.B.. M.S. — Dept of Zool.. Univ. of Cahfornia, LOS ANGELES 24, Cal., U.S.A. a. Biological characteristics of the developing serum of the embryo. Gallus domesticus (Aves) (in collaboration wath A. M. SCHECHTMAN) KNIGHT-IONES, E. W. D.Phil. — Marine Biol. Stat., Univ. Coll. of N.Wales, BANGOR, North Wales (U.K.) a. Factors inducing metamorphosis in larvae of marine benthic inverte- brates. Spirorbis borealis (Polychaeta) and Balanus balanoides (Cirri- pedia) KNOUFF. R. A. Ph.D., Prof. — Dept of Anat., Ohio State Univ., COLUMBUS 10, Ohio, U.S.A. (no data received over some years) KOCHER, W. — Zool. -vergl. Anat. Inst., Naturw. Fak., Univ. Zurich, Kiinstlergasse 16, ZURICH 6, Schweiz. (no data received on Nov. 1^', 1952) KOLLROS, J. J. Ph.D., Prof. — Dept of Zool.. State Univ. of Iowa, IOWA CITY, Iowa. U.S.A. a. The development of the spinal cord and nerves. Xenopus laevis (Anuta) (Normal Table) b. Influence of peripheral and intracentral factors upon the growth of the midbrain, Rana, Bufo, Pseudacris (Anura) c. Metamorphic effects of locally applied thyroxin (midbrain and gut). Rana, Bufo, Pseudacris, Ambystoma (Amphibia) Kollros 50 Kropp d. Regeneration of the midbrain in embryos and larvae. Rana, Bufo, Pseu- dacris, Xenopus (Anura) c. Development of the optic tectum following repeated crushing of the optic nerve. Xenopus (Anura) (in collaboration with Mrs V. PEPER- NIK) f. Metabolic studies of the normal and thyroxin-stimulated skin of tadpoles. Rana pipiens (Anura) (in collaboration with Mrs S. BARCH) g. The normal development of the cells of the mesencephalic V nucleus. (Anura) KONIGSBERG, I. R. A.B. Brooklyn Coll. — Dept of Biol.. The Johns Hopkins Univ.. Charles and 34th Strs. BALTIMORE 18. Md. U.S.A. a. Ontogeny of hormonal correlation of carbohydrate metabolism. Func- tional differentiation of the endocrine pancreas. Gallus domesticus (Aves) b. Carbohydrate levels in the decapitated embryo. Gallus domesticus (Aves) KONOPACKA. Mrs B. Dr, M.V.S.S. — Inst, of Histol. and Embryol., Acad, of Med., ul. Chalubinskiego 5. WARSZAWA, Poland. a. Observations on the chemical cytology of the placenta. Homo sapiens (Primates) b. Observations on the chemical cytology of the placenta. Mus musculus (Rodentia) KOPSCH, Fr. F.I.I.E.. DrMed.. Prof. (Emer.) — Archivstr. 9, BERLIN- DAHLEM, Deutschland. (Anat. Inst, der Humboldt Univ., Ostsektor) KRABBE, K. H. Dr Med. — Tornblad-Inst. of comp. Embryol., Biskops- gatan 7, LUND, Sweden, (from Kommunehospitalet, COPENHAGEN, Denmark) a. Morphogenesis of the brain. (Aves) KRAInSKA, Mrs M.K. Mag. of Sci. — Inst, of Histol. and Embryol.. Acad. of Med., ul. Chalubinskiego 5, WARSZAWA. Poland, a. Cytochemistry of oogenesis. (Insecta) KRAUSE, W. DrMed. — Anat. Inst, der Univ. Wien, Wahringerstr. 13. WIEN IX, Oesterreich. (no data received on Nov. 1^^ 1952) KRAUSS. M. Ph.D. — Biophysics Branch, Chemical Corps, Med. Labs, Army Chemical Center, MARYLAND, Md, U.S.A. a. Investigations on tissue hemolysins in adult and embryonic organs. Mus, Oryctolagus cuniculus (Rodentia) b. Effects of specific antisera on growth and differentiation. (Mammalia) c. Tissue regeneration following traumatic injury. (Mammalia) t KREDIET, G. F.I.I.E., Dr, Prof. — Veter.-Anat. Inst., Biltstr. 172, UTRECHT, Holland. KREMER, Miss A. K. — Zool. Lab. der Rijks Univ., Janskerkhof 3, UTRECHT. Holland. (no embryological work in progress) KRISZAT, G. Dr rer.nat. — Wenner-Grens Inst, for experimental Biology, Norrtullsgatan 16, STOCKHOLM Va., Sweden. a. Physiology of fertihzation and development; cell physiology (proto- plasmic state and chemical factors). b. Action of periodate on the egg surface. (Echinoidea) (in collaboration with J. A. M. RUNNSTROM) KROPP, B. N. A.M., Ph.D.. Prof. — Med. School. Queen's Univ., KING- STON, Ont., Canada. (no embryological work in progress) Kru 51 Lai KRUGELIS. Miss E. J. Ph.D. — Osborn Zool. Lab., Yale Univ., NEW HAVEN 11. Conn.. U.S.A. (no data received over some years) KUGLER, O. E.. Ph.D., Assoc. Prof. — Dept of Zool., Univ. of Illinois. URBANA. 111., U.S.A. (no embryological work in progress) KOHN, A. Dr Phil.h.c. Dr rer.nat.. Prof. — Max-Planck-Inst. fiir Biol., Spemannstr. 34, TUBINGEN, Deutschland. a. Wundhcilung und Regeneration. Ephestia und Ptychopoda (Lepidoptera) h. Entwicklung der Schuppen bei verschiedenen Mutanten und unter expe- rimentellen Bedingungen. Ephestia und Ptychopoda (Lepidoptera) c. Genwirkung und Phaenocopien bei der Ausbildung von Zeichnungs- mustern. Ephestia und Ptychopoda (Lepidoptera) d. Vergl. Untersuchungen der Furchung und Keimblatterbildung bei div. spec. (Hydroidea, Hydrozoa) e. Eiwachstum. (Cladocera, Branchiopoda) 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. KUNO, M. M.A. (Rigakushi) — Biol. Inst., Fac. Sci., Nagoya Univ., Chigusa-Ku. NAGOYA. Japan, a. Physiological studies on the cleavage of eggs. Strongylocentcotus pul- cherrimus, Pseudocentrotus depressus (Echinoidea) KURKIEWICZ. T. Dr Sc, Prof. — Inst. d'Histol. et d'Embryol., Fac. de Med. de I'Acad. de Med. a Poznan, ul. Swiecickiego 6, POZNAN, Pologne. (no data received on Nov. 1^*, 1952) KUTSKY, Miss P. B. A.B., Ph.D. — Dept of Zool.. Univ. of Cahfornia, BERKELEY 4, Gal.. U.S.A. (no data received on Nov. 1^', 1952) KUTSKY. R. J. A.B.. M.A. — Dept of Zool., Univ. of Cahfornia, BER- KELEY 4. Cal.. U.S.A. a. Fractionation of embryo extract for growth promoting factors in tissue culture. (Gallus domesticus (Aves) KUUSI, Miss T. K. DrPhil. — Zool. Lab., Univ. of Helsinki. Dept of Physiol.. P. Rautatiekatu 13, HELSINKI, Finland. — Lab. de Morphol. anim.. Univ. Libre de Bruxelles, 1850 Chaussee de Wavre. BRUXELLES-Auderghem, Belgique. 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. Triton (Urodela) b. Study on the process of induction caused by granular fractions containing ribonucleic acid marked with P32, analyzed by aid of radio-autographic methods. Triton (Urodela) LABADIE, Miss G. — Lab. d'Histol.. Dept d'Embryol., Fac. de Med., 31 Rue Lionnois, NANCY (Meurthe 6 Moselle). France, a. Etude des proprietes mecaniques des differents elements du cortex de I'oeuf. (Amphibia) (en collaboration avec A. DOLLANDER) LALLIER. R. A. Lic.es Sci. — Inst, de Biol, physicochimique, 13 Rue Pierre Curie. PARIS V. France, a. Li et developpement embryonnaire, etude de la biochimie des embryons hthines. Rana fusca. Ambystoma mexicanum (Amphibia) Lallier 52 Leb b. Etude de I'induction. Triton taeniatus (Urodela) c. Insuline et developpement embryonnaire. Rana [usca (Anura) d. Etude de la determination. Rana [usca (Anura), Paracentrotus lividus et Arbacia punctulata (Echinodermata) LAMY, F. M.A. — Dept of Biol., Massachusetts Inst, of Technology, CAM- BRIDGE 39, Mass., U.S.A. (no data received on Nov. 1^*, 1952) LANDAUER, W. Ph.D.. Prof. — Dept. of 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 chondrodystrophy" etc. Gallus domesticus (Aves) b. A causal analysis of teratogenic action of insuhn on developing embryos. Gallus domesticus (Aves) c. Hereditary (lethal) cyclocephaly and cyclopia. Gallus domesticus (Aves) d. Teratogenic action of boric acid in the embryo. Gallus domesticus (Aves) LANGEVOORT, H. L. M.Drs — Anat.-Embryol. Lab. der Rijks Univ., Oostersingel 69, GRONINGEN, Holland, a. Development of paraphysis and the circulation of the cerebrospinal fluid. Gallus (Aves) h. Development of meninges. Gallus (Aves) LANGMAN, J. — Anat. Lab., Vrije Univ., AMSTERDAM. (no embryological work in progress) LARAMBERGUE, M. de Dr es Sc, Prof. — Lab. de Zool., Fac. des Sci.. POITIERS, Vienne, France, a. Recherches sur le developpement embryonnaire de I'appareil genital her- maphrodite. (Gastropoda) h. Differenciation des gametes chez des formes hermaphrodites. (Gastro- poda) c. Genetique des races euphalhques et aphalhques. Bulinus truncatus (con- tortus) (Gastropoda) LASH, J. W. Doct. Cand. — Univ. of Chicago, Dept of Zool, CHICAGO 37, 111., U.S.A. (no data received on Nov. 1=^ 1952) LATIMER. H. B. Ph.D., Prof. — Dept of Anat., Med. School, Univ. of Kansas, LAWRENCE, Kansas, U.S.A. a. A study of the relative proportions in both thickness and weight of the free walls of the right and left ventricles of the heart, at various weights and heart sizes. Various animals, including Homo b. A quantitative study of the prenatal increase in weight and also in per- centage weight of the hypophysis, thyroid, thymus and suprarenal glands. Canis (Carnivora) c. 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 (Rodentia) LAURENT, M. — Lab. d'HistoL, Dept d'Embryol., Fac. de Med., 31 Rue Lionnois, NANCY (Meurthe & Moselle), France, a. Action de differentes substances chimiques sur le developpement embryonnaire. (Amphibia et Rodentia) LEBLOND, C. P. M.D.. Ph. D., Prof. — Dept of Anat., McGill Univ.. MONTREAL, Quebec, Canada, a. Development of the thyroid gland. (Vertebrata) Leblond 53 Lcl b. The development of bones and teeth as shown radioautographs with the help of radio-phosphorus and radio-carbon. (Vertebrata) (in colla- boration with R. GREULICH) LECAMP. M. — Lab. d'evolution des etres organises, Fac. des Sci. de Paris. 105 Boulevard Raspail, PARIS Vie, France, a. Regeneration — facteurs determinants. Alytes obstetricans (Anura) LEFEBVRES-BOISSELOT, Mrs J. Dr es Sc. — Lab. d'Embryol., Fac. de Med., 15 Rue Ecole de Med.. PARIS VI^ France, a. Teratogenese par carence en vitamines B. Mus rattus (Rodentia) h. Developpement anormal de I'oeil. Mus rattus (Rodentia) LEGHISSA. S. Ph.D. — 1st. di Anat. Comp., Via Belmeloro 8. BOLOGNA, (103), Italia, a. Study of egg-cortex. Fusion of blastomeres. (Ascidiae, Urochocdata) h. Differentiation and morphology of nervous tissue. (Coelenterata) c. Comparative neurology. (Vertebrata) d. Effects of antimitotics on regeneration of peripheral nerves and on meta- morphosis. Rana, Bufo (Anura) (in collaboration with P. PASQUINI) e. Regeneration of peripheric nerves. (Vertebrata) f. Action of vitamins (A, B group. C) on the histophysiology of endocrine glands during metamorphosis. Rana (Anura) LEGRAND, J.-J. Dr es Sc, Prof. — Lab. de Zool., Fac. des Sci., POITIERS, Vienne. France. a. Determination ct differenciation du sexe. (Oniscoidea et Cymothoidea, Isopoda, Crustacea) b. Developpement des coaptations. (Oniscoidea, Isopoda; Decapoda, Crus- tacea), (Insecta) c. Etude de la croissance. Porcellio dilatatus Brandt (Oniscoidea. Isopoda, Crustacea et Anilocra physodes L. (Cymothoidea, Isopoda. Crustacea) d. Modahtes de la reproduction. Platyarthtus schoblii (Oniscoidea) e. Analyse biometrique des populations de deux especes soeurs dans le nord et le midi de la France. Philoscia muscorum Scopoli et P. affinis Verhoeff (Oniscoidea) LEHMAN H. E. M.A., Ph.D., Prof. — Dept of Zool., Univ. of North Carolina, CHAPEL HILL, N.C., U.S.A. (no data received on Nov. 1^*. 1952) LEHMANN, F. E. F.I. I.E., Dr Phil., Prof. — Abt fur Zoophysiol., Zool. Inst, der Univ., Sahhstr. 8, BERN, Schweiz. a. Allometrisches Wachstum. (Amphibia) (in Zusammenarbeit mit diversen Mitarbeitern) b. Schwanzeregeneration, normal und chemisch beeinflusst. Xenopus (Anura) (in Zusammenarbeit mit diversen Mitarbeitern) c. Elektronenmikroskopische Struktur von tierischen Eiern. (Echinodermata, Ascidae und Tubifex) d. Regeneration (Bedeutung der I-Zellen). (Hydrozoa. Coelenterata) (in Zusammenarbeit mit P. TARDENT) e. Erzeugung van Teratomen bei Larven. Xenopus (Anura) LEHN, H. — Max-Planck-Inst. fur Biol., Spemannstr. 34, TUBINGEN. Deutschland. a. Reparationsleistungen. Hydra (Hydrozoa) LELIeVRE, a. Anc. Chef de Travaux — Lab. d'Embryol.. Fac. de Med.. 15 Rue Ecole de Med., PARIS VI^ France. Lelievre 54 Levy a. Etude des anomalies de divers types. Homo (Primates) LENDER, Th. Dr es Sc, Prof. — Lab. de Zool. de la Fac. des Sci. et Lab. d'Embryol. ct Teratol. exper. du C.N.R.S., Inst, de Zool. et de Biol, gen., 12 Rue de I'Universite, STRASBOURG. France, a. Regeneration des yeux. Role dus systeme nerveux dans la regeneration des yeux. Poly cells nigra (Tricladidea, Turbellaria) LEONE, V. M.D. — 1st. di Zool. e Anat. Comp., Univ. di Milano, Via Celoria 10, MILANO, Italia, (from 1st. di Anat. umana norm. dell'Univ. di PALERMO) a. Urea action on embryonic development. (Amphibia) b. Paper chromatography of embryonic extracts. (Amphibia) LEPORI, N. G. Lib.Doc, Prof. — 1st. di Zool. e Anat. Comp. dell'Univ.. Via A. Volta 4. PISA, Italia. — Lab. de Zool. de la Fac. des Sci. et Lab. d'Embryol. et Teratol. exper. du C.N.R.S., Inst, de Zool. et de Biol, gen., 12 Rue de I'Universite, STRASBOURG, France. a. Ovo- and spermatogenesis — chromosome cycle. Polycelis tenuis (Tri- cladidea, Turbellaria) h. Ovo- and spermatogenesis — chromosome cycle. Helix adspersa (Gas- tropoda) c. Recherches sur la differenciation de la peau et de la pigmentation. (Aves) LERMAN, L. Ph.D. — Dept of Pediatrics, Med. School, Univ. of Colorado, 4200 East Ninth Ave, DENVER 7, Col., U.S.A. a. Incorporation of labelled amino acids into protein fractions of muscle tissue. Gallus domesticus (Aves) LESHER, S. W. — Dept of Anat., Univ. of Kansas, Med. School, LAW- RENCE, Kan., U.S.A. a. Microchemical study of the developing salivary gland. Drosophila robusta (Insccta) (in collaboration with B. S. WENGER) (data of 1951 ) LEVAN DIEM, P. — Lab. d'Histol., Dept d'Embryol., Fac. de Med., 31 Rue Lionnois, NANCY (Meurthe & Moselle), France, a. Regulation de I'oeuf. (Amphibia) (en collaboration avec A. DOL- LANDER) LEVER, J. Dr Phil., Prof. — Zool. Inst., Free Calvinistic Univ., de Lai- ressestr. 174, AMSTERDAM-Z, Holland. a. Descriptive embryology. Colisa labiosa (Teleostei) LEVI, G: L. F.I. I.E.. Dr, 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) h. Recherches sur les caracteres de la structure et des proprietes biologiques dans les tissus cultives in vitro (Amniota) LEVI-MONTALCINI, Miss R. M.D.. Assoc. Prof. — Dept of Zool.. Washington Univ., Lindell and Skinker Aves, ST LOUIS 5, Mo, U.S.A. a. Neuro-embryology. Gallus domesticus (Aves) (in collaboration with V. HAMBURGER) LEVY, Mrs G. Dr es Sc, laureat de I'Acad.Med. — Lab d'Embryol., Fac. de Med., 15 Rue Ecole de Med., PARIS V^. France, a. Vitamines chez la mere et le foetus. Mus rattus (Rodentia) h. Teratogenese par carence. Mus rattus (Rodentia) Lew 55 Lip t LEWIS, F. Th. F.LLE., A.M.. M.D., Prof. — Harvard Med. School. 25 Shattuck Str., BOSTON 15, Mass.. U.S.A. LEWIS, W. H. F.I. I.E.. Dr. Prof. (Emer.) — Wistar Inst, of Anat. and Biol., PHILADELPHIA 4. Pa., U.S.A. (no data received) LI, Miss S. C. B.S. — Dept of Zool., Coll. of Sci., Nat. Univ. of Peking, Ching Shan Tung Chieh, PEIPING, China. (no data received over some years) LIAO Y. K. B.S. — Dept of Zool., Coll. of Sci., Nat. Univ. of Peking, Ching Shan Tung Chieh, PEIPING, China. (no data received over some years) LILLIE, R. S. Ph.D.. Sc.D. — Physiol. Lab.. Univ. of Chicago. CHICAGO 37. 111., U.S.A. — Marine Biol. Lab., WOODS HOLE. Mass.. U.S.A. a. Artificial activation of unfertilized marine eggs. Determination of physio- logical (and physico-chemical) factors concerned in the change of the egg from the resting to the active and developing state. Asterias [orbesii and Arbacia punctulata ( Echinodecmata) (data of 1951) LIMBORGH. J. van Med. Drs — Anat.-Embryol. Lab. der Rijks Univ., Janskerkhof 3, UTRECHT, Holland, a. Origin, of the asymmetry of the gonads in bird-embryos. Anas boschas (Aues) h. Differentiation of sex in birds. Anas boschas (Aves) LINDAHL, P. E. F.I. I.E., Fil.Dr, Prof. — Inst, for Zoophysiol., Fac. of Mat.-Nat.Sci., Villavagen 9, UPPSALA, Sweden, a. Large scale separation of macromeres, mesomeres and micromeres of the developing egg. ( Echinoidea) h. Changements of dehydrogenase system at fertihzation. (Echinoidea) c. The biochemical mechanism of the animahzation of the unfertilized egg. (Echinoidea) d. The biochemical background for the vegetalization of the egg by Li + , (Echinoidea) e. The physiology of ripening in spermatozoa. (Mammalia) f. The mechanism of agglutination of spermatozoa. (Mammalia) g. The primary sex rate. (Mammalia) LINDBERG, N. O. H. Phil.Dr — Wenner-Grens Inst, for experimental Biology, Norrtullsgatan 16. STOCKHOLM Va., Sweden, a. On surface reactions of the egg with special attention to phosphate- metabolism. On the dehydrogenase systems of the egg. (Echinoidea) LINDSKOG. B. Med. kand. — Tornblad-Inst. of comp. Embryol., Biskops- gatan 7. LUND, Sweden, a. Influence of anaesthesia on embryonic development. Mus musculus (Rodentia) (team work with B. KALLfiN) LIPSCHUTZ, A. M.D.. Prof. — Depto de Med. Exper. del Servicio Nacio- nal de Salubridad, Av. Irarrazaval 849, SANTIAGO, Chile, S. America. a. Abnormal ovarian differentiation due to , .hormonal imbalance" with deranged gonadotrophic activity of the anterior lobe of the hypophysis. Cavia cobaya (Rodentia) b. Abnormal differentiation of the different parts of the Wolffian body, due to hormones. Cavia cobaya (Rodentia) Lis 56 Lumb LISON L. — Lab. d'Anat. et d'Embryol., Fac. de Med. de I'Univ., 97 Rue aux Laines, BRUXELLES. Belgique. a. Photometric quantitative determinations of desoxyribonucleic acid (D.N. A.) in resting cells, mitosis, spermatogenesis and development (in collaboration with J. J. PASTEELS) LITTLE, C. C. Sc.D., Prof. — Jackson Memorial Lab.. Box 558, BAR HARBOR, Me, U.S.A. (no data received on Nov. 1^', 1952) LITTRELL, J. L. Dr — Baxter Laboratories, MORTON GROVE, 111., U.S.A. a. Factors influencing regeneration of nerve fibers in the central nervous system of adult animals. Felis domestica (Carnivora) and (Anthropoidea) (in collaboration with W. F. WINDLE and E. G. STUART) b. Growth and regeneration of the severed spinal cord in embryos. Gallus domesticus (Aves) (in collaboration with W. F. WINDLE and E. G. STUART) LIU J C. B.S., Ph.D., Asst Prof. — Dept of Anat., School of Med., Univ. ' of Pennsylvania, PHILADELPHIA 4, Pa, U.S.A. a. Restoration of the intrinsic neurons following damage. LOMBARD, G. L. Ph.D. — Zool. Inst., Fac. of Sci., Univ. of Pretoria, PRETORIA, S. Africa. — Hubrecht Lab., Internat. Embryol. Inst., Janskerkhof 2, UTRECHT, Holland (until November 1952). a. Investigations into the effects of LiCl on the early development. Xeno- pus laevis Daudin and Ambystoma mexicanum (Amphibia) b. Homoplastic transplantations of presumptive neural areas between Lithium-treated and normal blastulae/early gastrulae, respectively. Tri- turus, Ambystoma, Plemodeles (Urodela) LPVTRUP, S. Mag.scient. — Cytochem. Dept, Carlsberg Lab., 8 Gl. Carlsbergvej, COPENHAGEN Valby, Denmark. a. Proteolytic enzymes during development. Ambystoma mexicanum (Urodela) h. Metabolism (Oo-consumption) at different temperatures. Ambystoma mexicanum (Urodela) LUBCHENCO, L. M.D. — Dept of Pediatrics, Med. School, Univ. of Colorado, 4200 East Ninth Ave, DENVER 7, Col, U.S.A. a. Study of developmental disturbances related to nutritional deficiencies investigated by application of anti-vitamins and anti-animo acids to the intact egg and to explants (somites). (Aves) (in collaboration with H. HERRMANN, J. MACKENZIE and U. ROTHFELS) LUDTKE, H. Dr, Prof. — Zool. Inst, der Univ., Katharinenstr. 20, FREI- BURG i.Brsg., Deutschland. a. Entwicklung der Sehleistung. Notonecta glauca (Heteroptera, Hemip- teroidea, Insecta) h. Entwicklung der Sehleistung. Mus rattus (Rodentia) (gemeinsam mit G. HERMANN) c. Entwicklung der Sehleistung. (Lepidoptera; Culicidae, Diptera) (gemein- sam mit G. HAAS und P. BUTZ) LUMB, Miss E. S. Ph.D. — Dept of Biol., Coll. of Arts and Sci., Univ. of Rochester, ROCHESTER 3, N.Y., U.S.A. a. A cytochemical study of the nucleic acids in the differentiating spinal nervous system. Gallus domesticus (Aves) Lun 57 Macm LUNDBORG, H. A. — Embryol. Dept, Histol. Inst., Karolinska Inst., Sol- navagen 1, STOCKHOLM 60, Sweden. (no data received on Nov. 1^', 1952) LUSCHER, M. DrPhil. (Basel) — Zool. Anstalt. Univ. Basel, BASEL. Schweiz (and Swiss Tropical Inst., BASEL, Schweiz) a. Differentiation of castes in termites, especially the determination of sup- plementary reproductives in primitive termites. Kalotermes flavicollis (Fabr.) (Isoptera, Hexapoda) h. Descriptive and experimental study of the glands producing moulting + metamorphosis hormones. Zootermopsis nevadensis (Hagen) (Isoptera, Hexapoda) LUTHER, W. Dr Phil.. Prof. — Zool. Inst, der Univ.. MARBURG, Deutschland (no data received over some years) LUTZ H. DresSci. — Lab. de Zool.. Fac. des Sci., 1 Avenue Vercinge- torix, CLERMONT-FERRAND, France, a. Developpement du blastoderme pendant les premieres heures de I'incu- bation. Anas (Aves) h. La polyembryonie experimentale; I'orientation des embryons. (Aves) c. Polvembryonie experimentale. Salmonidae (Teleostei) (en collaboration avec Mrs LUTZ— OSTERTAG) LUTZ— OSTERTAG, Mrs Y. Lic.es Sci — Lab. de Zool., Fac. des Sci.. 1 Avenue Vercingetorix. CLERMONT-FERRAND. France. — Lab. de Zool. de la Fac. des Sci. et Lab. d'Embryol. et Teratol. exper. du C.N.R.S., Inst, de Zool. et de Biol, gen., 12 Rue de I'Universie. STRASBOURG. France. a. La genese de Tasymmetrie du tractus genital et la regression des canaux de Miiller par la methode d'explantations. Gallus (Aves) b. Role des hormones dans la differenciation primaire du sexe. Gallus (Aves) (en collaboration avec Et. WOLFF) c. Polyembryonie experimentale. Salmonidae (Teleostei) (en collaboration avec H. LUTZ) LYESEN, A. H — Zool. Lab. der Rijks Univ.. Janskerkhof 3, UTRECHT. Holland, a. Analysis of lithium action. Limnaea stagnalis (Gastropoda) (in collabo- ration w^th D. BOSSCHAERT, Miss C. H. M. BRAAT, Miss S. C. A. HAIJE. J. H. W. NICOLAI, Miss A. J. PARIS, Chr. P. RAVEN. F. van RIJCKEVORSEL and Miss L. G. de VRIES) LYON, Miss M. F. Ph.D. — Med. Res.Council, Inst, of Anim. Genet., King's Buildings. West Mains Rd. EDINBURGH 9, Scotland (U.K.) a. Developmental study of absence of otoliths. Mus musculus (Rodentia) h. Developmental study of the zigzag mutant. Mus musculus (Rodentia) MACKENZIE, }. Ph.D. — Dept of Pediatrics, Med. School, Univ. of Colo- rado, 4200 East Ninth Ave, DENVER 7, Col., U.S.A. a. Study of developmental disturbances related to nutritional deficiencies investigated by application of anti-vitamins and anti-animo acids to the intact egg and to explants (somites). (Aves) (in collaboration with H. HERRMANN, L. LUBCHENKO and U. ROTHFELS) MACMILLAN, E. W. Dr. — Dept of Anat., Univ. of Liverpool, LIVER- POOL. England (U.K.) a. The importance of the epididymis and its vascularization for spermato- genesis. (Mammalia) (in collaboration with R. G. HARRISON) Mak 58 Mang MAKING. S. Nogakushi, Rigakuhakushi (Dr). Prof. — Zool. Inst., Fac. of Sci., Hokkaido Univ., North 8, West 5, SAPPORO. Japan. a. Chromosome study in mammals. Felis leo, F. bengalensis, F. dom. (Car- nivora), (Anthropoidea) b. Effects of some chemicals such as caffein, acryflavine, podophyllin and mustard upon the cell and nuclear divisions, with reference to the remar- kable behaviour of mitochondria. Podisma sapporoense (Orthoptera) c. 1. Cytological studies on the Yoshida sarcoma, an ascites tumor of white rats, with regard to the mitotic abnormahties. mitotic rate and variation of the chromosome number. 2. Characteristics and individuahty of chro- mosomes in tumor cells of the Yoshida sarcoma which contribute to the growth of the tumor. Effect of podophillin upon tumor cells of the Yos- hida sarcoma. 3. Behaviour of tumor cells in a transplant generation. Rattus noTuegicus (Rodentia) d. Induction of new ascites sarcoma by the application of azo dye. with a survey on the karyological changes occuring in treating tissue cells. Rattus norvegicus (Rodentia) e. A study of the changes of the nuclear elements during carcinogenesis of ascites sarcomas. Rattus norvegicus (Rodentia) f. A study of the chromosome constitutions and their individuahty in the strain cells of certain ascites sarcoma, which contribute to the growth of the tumor. Rattus norvegicus (Rodentia) g. Growth inhibition by podophyllins in ascites sarcomas. Rattus norv. h. A study of cell division in living rat sarcome cells and in grashopper spermatocytes by motion pictures utihzing phase microscopy. (Rodentia and Orthoptera) MALAN, Miss M. E., D.Sc. — Zool. Inst., Univ. of Stellenbosch, STEL- LENBOSCH, S. Africa. — Laboratoire d'Anat. et d'Embryol., Fac. de Med. de I'Univ., BRUXELLES, Belgique. a. Gastrulation. growth of primative streak and presumptive area map (vital staining). Gallus domesticus (Aves) MALTESE. Miss C. Dr — 1st. di Zool.. Via Archirafi 18, PALERMO. Italia, a. Hatching enzymes. (Amphibia) MANARESI, Miss A. Dr Nat.Hist. — 1st. di Anat. Comp., Via Belmeloro 8, BOLOGNA (103). Italia, a. Histogenesis of motor nuclei of cranial nerves. (Vertebrata) MANCUSO, V. Dr — 1st. di Zool.. Via Archirafi 18, PALERMO, Italia. a. The distribution of enzymes and of other substances in the germ during development. (Ascidiae, Urochordata) b. Enzymes and other substances in embryonic development. (Pulmonata, Gastropoda) MANDL, Miss A. M. B.Sc.(Lond.), Ph.D.(B'ham) — Dept of Anat.. The Med. School, Birmingham Univ., Edgbaston. BIRMINGHAM 15. England (U.K.) a. Study of oogenetic function. (Rodentia) MANGOLD, O. F.I.I.E., Dr, Prof. — Heihgenberg-Inst., (17b) HEILI- GENBERG, Kreis Ueberlingen/Bodensee, Deutschland. a. Entstehung und Determination der Geschlechtszellen und Gonaden. Triton (Urodela) (gemeinsam mit O. STARK) Mangold 59 Maz b. Determinationsvorgangc in der Gastrula und Neurula. Triton (Urodela) (gemeinsam mit Miss H. WAECHTER) c. Einfluss ungiinstiger aussercr Bedingungen auf Entwicklung. Triton (Urodela) (gemeinsam mit Miss H. ^VAECHTER) d. Regulationsvorgange an experimentell hergestellten eineiigen Zwillingen. Triton (Urodela) (gemeinsam mit I. TESTA) MANHOFF, L. J. M.D. — Rob't B. Green Hosp.. SAN ANTONIO, Texas, U.S.A. a. Experimental production of anomalies of the fourth and sixth aortic arches by microelectrocoagulation in 3-day embryos. Gallus (Aves) MANTON. S. M. F. R. S., M. A.. Sc.D. — King's Coll.. Strand. LONDON W.C.2, England (U.K.) a. Embryology. Peripatopsis (Onychophora, Annelida) MARCHLEWSKI. J. H. Dr — Zaklad Anat. Porownawczej U.J. im. H. Hoyera. sw. Anny 6, KRAKOW, Poland. a. Artificial inseminations with semen stored in different conditions. Gallus domesticus (Aves) b. The rearing of European forms. Tetraonidae (Galliformes, Aves) MARJANEN, P. — Zool. Lab., Univ. of Turku. TURKU, Finland. (no embryological work in progress) MARKERT. C. L. Ph.D. — Dept of Zool., Univ. of Michigan. ANN ARBOR, Mich., U.S.A. a. Influence of cellular genotype on substrate specificity of tyrosinase in melanoblasts cultured in vitro. Gallus domesticus (Aves) and Pero- myscus maniculatus (Rodentia) h. Role of nucleic acid synthesis in cellular differentiation. Ascidia nigra (Urochordata and Lytechinus variegatus (Echinoidea) c. The effects of metabolite analogs on embryonic development. Rana pipiens (Amphibia) MARLIER, G. — Lab. de Zool., Fac. des Sci., Inst, de Zool. Torley-Rous- seau, Univ. libre de Bruxelles, 50 Av. F. D. Roosevelt. BRUXELLES. Belgique. (no data received on Nov. l^S 1952) MASLIDA, H. — Lab. of Embryol. and Exp. Morphol., Zool. Inst., Dept of Sci.. Kyoto Univ.. KYOTO, Japan, a. Behaviour of phosphor in early development. Triturus pyrrhogaster (Urodela) h. Induction in regenerating blastema. Triturus pyrrhogaster (Urodela) c. Regional differences of induced structure. MASY. Miss S. — Inst. d'Anat.. Univ. de Louvain, 38 Rue dcs Recollets, LOUVAIN. Belgique. a. Experimental analysis of the development of the appendicular skeleton in the embryo. Gallus (Aves) h. The peripheral nervous system of the head of a young embryo. Homo (Primates) MATHER, W. B. M.Sc. — Zool. Dept. Univ. of Queensland. George Str., BRISBANE, Queensland, Australia, a. Superimplantation. Oryctolagus cuniculus L. (Rodentia) MAZIA, D. Ph.D. — Dept of Zool., Univ. of Cahfornia. BERKELEY 4, Gal., U.S.A. (no data received on Nov. !«*, 1952) McC 60 Mia McCAFFERTY. R. E. Ph.D. — Dept of Anat., School of Med., Univ. of Maryland, BALTIMORE 1, Md, U.S.A. a. Retardation of growth in the fetus by maternally administered beta radia- tion. Miis musculus (Rodentia) McGALLION, D. J. B.A., M.A., Ph.D., Prof. — Dept of Biol.. Acadia Univ., WOLFVILLE, Nova Scotia, Canada, (no data received on Nov. 1^', 1952) McKEEHAN, M. S. M.S., Ph.D. — School of Anat., Univ. of Virginia, CHARLOTTESVILLE, Va, U.S.A. a. A study of the effects on lens induction of blocking contact between retina and lens ectoderm with various membranes. Gallus domesticus (Aves) h. The self-differentiating capacity of the developing lens as tested by transplantation experiments. Gallus domesticus (Aves) MEDAWAR, P. B. M.A., D.Sc. — Dept of Zool. and Comp. Anat., Univ. Coll. London. Cower Str., LONDON W.C.I, England (U.K.) a. Development of capacity to respond tot antigens. Bos taurus ? (Artio- dactyla) and Mus musculus (Rodentia) MELLANBY, Sir Edward — National Institute for Med. Research, Mill Hill, LONDON, England (U.K.) a. The effect of vitamin A on organ cultures in vitro, (in collaboration with Miss H. B. FELL. Cambridge) MELNOTTE, P. J. — Lab. d'HistoL, Dept d'EmbryoL, Fac. de Med.. 31 Rue Lionnois, NANCY (Meurthe & Moselle), France, a. Etude des proprietes de permeabiHte du cortex de I'oeuf. (Amphibia) (en collaboration avec A. DOLLANDER) MENSCHIK, Z. M.B., Ch.B.. M.D., Prof. — Dept of Anat., Fac. of Med., Univ. of Ottawa, OTTAWA. Canada. a. Influence of dietary fats on development with special reference tot deve- loping adipose tissue. Oryctolagus cuniculus (Rodentia) b. New histochemical methods for demonstration of phospholipids and unsaturated fatty acids to be used for the study of developing adipose tissue. Oryctolagus cuniculus (Rodentia) MERRITT, Mrs J. K. M.S. — Dept of Embryol. Div. of Biol. CaHfornia Inst, of Technol.. PASADENA 4, Cal.. U.S.A. a. Investigations of the chemical and biological properties of fertilizins of invertebrates. Strongylocentrotus purpuratus and Arbacia punctulata (Echinoidea) (in collaboration with A. TYLER) METTETAL, C. Dr es Sci. — Lab. de Biol. Anim., Centre d'fitudes 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. — Osborn Zool. Lab., Yale Univ.. NEW HAVEN 11, Conn., U.S.A. (no data received over some years) MEYER. R. de — Inst. d'Anat.. Univ. de Louvain. 38 Rue des Recollets, LOUVAIN, Belgique. a. EmbryolOgical development of the nodal tissue in the heart. (Aves) MIALHE, P. — Lab. d'evolution des etres organises, Fac. des Sci. de Paris, 105 Boulevard Raspail, PARIS Vie, France, a. Action of antithyroid drugs on development of the pancreas. Gallus gallus (Aves) Mich 61 Monr MICHAEL. Milad I. B.Sc. — Dept of Zool., Farouk I Univ., Moharram Bey. ALEXANDRIA. Egypt, a. The metamorphosis of the hyobranchial skeleton. Bu[o regularis (Anura) (in collaboration with Shokralla N. SEDRA) MICKIEWIECZ, Miss Z. Physician — Inst, of Histol. & Embryol.. Acad, of Med., Narutowicza 60, LODZ, Poland, a. Influence of sulphonamides on monstruosities in embryos. Gallus (Aves) h. Influence of sulphonamides on the size of embryos. Gallus (Aves) MILLARD— BOKENHAM, Mrs N. A. H. Ph.D. — Dept of Zool., Univ. of Cape Town, Rcndebcsch, CAPE TOWN, S. Africa. a. Complete development of the veins and arteries. Xenopus laevis (Anura) (Work complete but Normal Table still to be done) MINGANTI, A. Dr — 1st. di Zool.. Via Archirafi 18, PALERMO, Italia, a. The cytology of hybrids. Lethal hybrids. (Ascidiae, Urochordata) h. The physiology of fertilization. (Ascidiae, Urochordata) c. Phosphatases in embryonic development and metamorphosis. (Ascidiae, Urochordata) MINTZ, Miss B. M.S., Ph.D, Asst Prof. — Whitman Lab.. Univ. of Chicago, 5700 S. Ingleside. CHICAGO 37, U.S.A. a. Role of hormones in sex differentiation: intracoelomic embryonic gonad grafts between species. Gallus and Anas (Aves) h. Sex development of embryonic hosts receiving intracoelomic grafts of experimentally sex-reversed gonads. Gallus domesticus (Aves) c. In vivo explants of paired embryonic gonads. Gallus domesticus (Aves) MIYAMORI-YAMAMOTO, H. M.Sc. — Lab. Exp. Embryol., Inst, of Polytechn., Osaka City Univ., Minami-Ogimati, Kita-ku, OSAKA, Japan, a. Effects of various proteinic and sterolic hormones upon the sex-differen- tiation of gonad. Hynobius nebulosus (Schlegel) (Urodela) MOLL, J. Dr Med. — Anat. -Embryol. Lab. der Rijks Univ.. Oostersingel 69, GRONINGEN, Holland, a. Embryological development of the roof of the fourth ventricle and the area postrema. (Mammalia and Aves) h. Joint development. Homo (Primates) and Mus musculus (Rodentia) MONET, Miss N. A. — Central de Investig., Minist. de Salud Piibl. de la Nacion. Bolivar 1128, BUENOS AIRES, Argentina, a. Mucopolysaccharides in development. Bufo arenarum (Anura) MONNE, L. Phil.Dr, Prof. — Statens veterinarmedic. anstalt, Experimen- talfaltet, STOCKHOLM 50, Sweden, a. Correlations between structure and function of the cytoplasm. (Echinoidea) h. Topochemistry of developing eggs and embryos. (Echinoidea) MONROY, a. M.D.. Prof. — Istituto di Anatomia comparata, Universita di Palermo. PALERMO. Italia. a. Continued investigations on the role of pigment in morphogenesis. (Echinodermata) (in cooperation with Miss M. de NICOLA) b. Analysis of the changes in the protein systems of the egg as a result of fertilization. (Echinodermata) (in cooperation with Miss L. TOSI) c. Analysis of the interactions between jelly-coat substance and egg pro- teins. (Echinodermata) (in cooperation with P. DOHRN) Mont 62 Mori MONTALENTI. G. Dr Sc. Prof. — 1st. di Genet. dell'LIniv. di Napoli. Fac. di Sci, Via Mezzocannone 8, NAPOLI, Italia. (no data received over some years) MONTEFOSCHI. Miss S. Dott. Sci. Biol. — Stazione Zool. di NAPOLL Italia. a. Metabolism of nucleic acids in ovogenesis. (Isopoda, Decapoda) b. Physiology of fertilization. (Echinoidea) MONTEROSSO, B. Prof, ord., Dir. — 1st di Zool. e Anat. comp., Univ. Via Androne 25, CATANIA, Italia. (no data received on Nov. 1^', 1952) MOOG. Miss F. Ph.D., Assoc. Prof. — Dept of Zool., Washington Univ., Lindell & Skinker Aves, ST LOUIS 5, Mo, U.S.A. a. Development of enzyme systems in the embryo. Gallus domesticus (Aves) and (Mammalia) MOOKERJEE, S. M.Sc Ph.D. — Cell Research Unit, Chittranjan Cancer Hospital, CALCUTTA 26, India. a. Cytochemical studies of embryonic cells during tissue formation. Gallus (Aves), Rana, Bufo (Anura) b. Cell movements and shape changes in embryos. Triton (Urodela) (in collaboration with C. H. WADDINGTON) c. Phase contrast study of denuded corneal cells after beta ray treatment and their reaction to sub-lethal cytolysis. Mus musculus (Rodentia) (in collaboration with S. SANYEL) d. Localization of enzymes in cancer cells in vitro. Homo (Primates) MOORE, A. R. Ph.D., Prof. — Physiol. Lab., Coll. of Sci., Univ. of Port- land. PORTLAND 3, Ore., U.S.A. a. On the architecture of blastula and gastrula. Dendraster excentricus (Clypeastroidea, Echinoidea) and Patiria miniata (Spinulosa, Asteroidea) MOORE, Mrs B. C. A.B., A.M., Ph.D. — Dept of Zool, Fac. of pure Sci.. Columbia Univ., Broadway and 116 Str., NEW YORK 27, N.Y., U.S.A. a. A study of nucleo-proteins in development. Photometric analysis of haploid and diploid embryonic tissues. Rana pipiens (Anura) MOORE, C. R. Dr, Prof. — Dept of Zocl., Univ. of Chicago, CHICAGO, 111., U.S.A. (no data received on Nov. U\ 1952) MOORE, J. A. A.B., M.A., Ph.D., Prof. — Dept of Zool, Fac. of pure Sci.. Columbia Univ., Broadway and 116 Str., NEW YORK 27, N.Y.. U.S.A. a. Competence of androgenetic (haplo-hybrid) gastrula ectoderm, tested by xenoplastic and heteroplastic transplantation to diploid hosts. Rana pipiens and Rana sylvatica (Axnura) h. Gastrula ectoderm competence and dorsal lip potency in hybrid embryos tested by xenoplastic and heteroplastic transplantations to diploid hosts. Rana pipiens 2 x Rana clamitans $ (Anura) MORI. H. M.A.. Asst Prof. — Biol. Lab.. Keio Univ., Hiyoshi. Kohoku, YOKOHAMA, Japan, a. Insecticide action on eggs, larvae and adults. (Insecta) MORI, Y. M.A.. Prof. — Biol. Lab.. Keio Univ.. Hiyoshi. Kohoku, YOKO- HAMA, Japan, a. On the cause of disappearance of cutaneous melanophores of young animals. Carassius auratus (Teleostei) Moric 63 Na MORICARD, R. Dr en Med., Dr es Sci. — Lab. d'Hormonol. et Cytol. exper., Ecole des Hautes Etudes, Univ. Hopital Broca, III Rue L.M. Nordmann, PARIS XIII^ France. a. Recherches sur la maturation de I'ovocyte. Oryctolagus cuniculus (Rodentia) b. Recherches sur la fecondation de I'ovocyte. Oryctolagus cuniculus (Rodentia) MORLON, Miss C. — Lab. d'Embryol., Fac. de Med., 15 Rue Ecole de Med., PARIS VI^ FRANCE, a. Retentisscment des privations d'oxygene et intoxication par le CO sur des embryons. Homo (Primates) et Mus rattus (Rodentia) MOSSMAN, H. W. Ph.D., B.S., M.S.. Assoc. Prof. — Dept of Anat., Univ. of Wisconsin, MADISON, Wis., U.S.A. (no data received on Nov. 1^*, 1952) MOTOMURA, I. Dr Sc, Prof. — Lab. of Embryol., Inst, of Biol., Tohoku (Imperial) University, SENDAI, Japan. (no data received on Nov. 1^*, 1952) MUCHMORE, W. B. Ph.D. — Dept of Biol.. Coll. of Arts and Sci., Univ. of Rochester, ROCHESTER 3, N.Y.. U.S.A. a. Early differentiation of trunk mesoderm. Ambystoma maculatum (Urodela) MULLIGAN, W. J. M.D. — Free Hospital for Women, 245 Pond Ave. BROOKLINE. Mass., U.S.A. a. Development of ova from fertiHzation to 14-days (first missed menstrual period). Homo (Primates) (in collaboration with A. T. HERTIG and J. ROCK) b. A morphologic description of 3 segmenting embryos; a 2-cell tubal ovum, a 50-cell early blastula (4 days-uterine), and a 100-cell blastula (4j/2 — 5 days-uterine). Homo (Primates) (in collaboration with A. T. HER- TIG and J. ROCK) MULNARD, J. M.D. — Lab. d'Anat. et d'Embryol.. Fac. de Med. de rUniv., 97 Rue aux Laines. BRUXELLES, Belgique. a. Cytochemical observations on oogenesis and development. Acanthosce- lides (Coleoptera) and Drosophila (Diptera) h. Study of the nucleoles of the giant cells. (Diptera) c. Study of the atypical spermatogenesis and its eventual relations to poly- ploidy. Acanthoscelides (Coleoptera) MURRAY, P. D. F. F.I. I.E., M.A., D.Sc. Prof. — Dept of Zool.. Univ. of Sydney. SYDNEY. N.S.W.. Australia, a. Development of the membrane bones of the skull. (Anura), (Lacertilia), (Chelonia), Gallus domesticus (Aues) h. Development in vitro of the scleral bones. Gallus domesticus (Aves) MUSTAKALLIO, M. M.D., Prof. — Dept of Anat., Fac. of Med., Helsinki Univ.. HELSINKI, Finland. (no data received on Nov. 1^*, 1952) NACE, G. W. B.A.. M.A., Ph.D., Asst Prof. — Zool. Dept, Duke Univ., DURHAM, N.C., 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) Nak 64 Newell NAKAMURA, O. Ph.D., Prof. — Lab. of Morphol., Osaka Liberal Arts Univ.. IKEDA, Osaka Pref., Japan, a. Map of presumptive regions and formative movements. Triturus, Hynobius, Rana (Amphibia) h. Experimental analysis of development of tail. Triturus (Urodela) c. Formation of digestive tract. Rana, Triturus, Hynobius (Amphibia) NAKANO. E. M. A. (Rigakushi) — Biol. Inst., Fac. Sci., Nagoya Univ.. Chigusa-Ku, NAGOYA. Japan, a. Respiratory metabolism during early development. Experiments with Cartesian divers. Oryzias latipes (Teleostei) h. Analysis of the action of lithium on development. Oryzias latipes (Teleostei) c. Mechanism of monospermy. Hemicentrotus pulcherrimus (Echinoidea) NEEDHAM. A. E. M.A.. B.Sc. — Dept of Zool. and Comp. Anat.. The Univ. Museum. OXFORD. England (U.K.) a. The central nervous system and limb-regeneration. Asellus aquaticus (L.) (Isopoda, Crustacea) h. Investigation into the failure of regeneration. Glossiphonia (Rhynchob- dcllida, Hirudinea) c. Nitrogen excretion during regeneration. Carcinus moenas Leach (Deca- poda, Crustacea) d. Glycogen, ribonucleic acid, alkaline phosphatase content of tissues during regeneration. Asellus aquaticus (L. ) (Isopoda, Crustacea) NEEDHAM, J. F.I.I.E., Dr, Prof. — Gonville and Cains Coll.. CAM- BRIDGE. England, (no data received) NEF, W. — Zool. Inst, der Univ. Bern, Sahlistr. 8, BERN, Schweiz. a. Entwicklungsphysiologie einer Fliigel-Borsten-Mutante. Drosophila (Insecta) (in Zusammenarbeit mit S. ROSIN) NEUKOM. B. J. B.S. — Dept of Pediatrics. Med. School. Univ. of Colo- rado, 4200 East Ninth Ave, DENVER 7, Col., U.S.A. a. Chemistry of muscle differentiation, determination of actin and myosin and phosphate fractions in muscle of embryos after the 7th day of deve- lopment (concluded). Gallus (Aves) (in collaboration with H. HERR- MANN) b. Determination and fractionation of nucleoproteins and determination of enzymes in somites from the 2nd to the 5th day of incubation and in differentiating muscle from the 7th day of incubation to hatching. Gallus (Aves) (in collaboration with H. HERRMANN) c. Chemical fractionation of cell nuclei and mitochondria of differentiating muscle. Gallus (Aves) (in collaboration with H. HERRMANN) 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. a. Comparison of normal head development with that of the mutant tumo- rous head which produces asymmetrical, abnormal growths on the eye, antenna or other head parts other than the mouth. Drosophila spec. (Diptera) NEWELL. G. E. B.Sc. Ph.D. — Dept of Zool.. Queen Mary Coll.. Univ. of London. Mile End Rd., LONDON E. 1, England (U.K.) (no embryological work in progress) Newth 65 Nieuw NEWTH. D. R. B.Sc. Ph.D. — Dept of Zool. and Comp. Anat., Univ. Coll. London, Gower Str., LONDON W. C. 1. England (U.K.) a. The fate of the neural crest. Lampetra planed (Cyclostomata) b. The measurement of the forces involved in neurulation. (Urodela) 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. a. Continued investigation by homologous and heterologous transplantation of embryonic material relating to its development in the anterior chamber in the eye using the method developed by H. S. N. GREENE. Homo, Cavia and Mus musculus (Mammalia) b. Continuation of investigations deahng with the heterotransplantability of neoplasms, utihzing the anterior ocular chamber of the guinea pig and the rabbit. Canis and Homo (Mammalia) c. An investigation deahng with the transplantability of Hodgkin's Disease Tissue in foreign species, using growth stimulating substances and modi- fying the donor tissue in various ways, (in collaboration with D. ZACKRY and J. M. ROSE) NICHOLAS, J. S. F.LLE., Ph.D., Prof. — Osborn Zool. Lab., Yale Univ., NEW HAVEN 11, Conn., U.S.A. (no data received on Nov. 1^', 1952) NICOLA, Miss Marina De Dr Sci. — 1st. di Genet. dell'Univ., Fac. de Sci., Via Mezzocannone 8, NAPOLI, Italia, a. Continued investigations on the role of pigment in morphogenesis. (Echinodermata) (in cooperation with A. MONRO Y) NICOLAI, J. H. W. — Zool. Lab. der Rijks Univ., Janskerkhof 3, UTRECHT, Holland, a. Analysis of lithium action. Limnaea stagnalis (Gastropoda) (in collabo- ration with D. BOSSCHAERT, Miss C. H. M. BRAAT, Miss S. C. A. HAIJE, Miss A. H. LYESEN, Miss A. J. PARIS, Chr. P. RAVEN, F. van RIJCKEVORSEL and Miss L. G. de VRIES) NICOLETTI, B. — 1st. di Biol, gen., Fac. di Med., S. Pietro, PERUGIA, Italia, a. Anelli di Liesegang e sviluppo embrionale. Bufo (Anura) NIESSING, K. Dr Med., Prof. — Anat. Inst, der Univ., Robert Kochstr. 6, MARBURG/Lahn, Deutschland. a. Entwicklung der autonomen Ganglien. Xenopus (Anura) NIEUWKOOP, P. D. Phil.Dr — Hubrecht Lab.. Internat. Embryol. Inst., Janskerkhof 2, UTRECHT, Holland. a. Early development from fertilization till end of neurulation. Xenopus laevis (Anura) (Normal Table) b. Analysis of the regulative potencies of the invaginating archenteron roof and the induced neural plate along the dorso-ventral and cranio-caudal axes, by heteroplastic transplantation of parts of the dorsal blastoporal lip. Tritucus alpesttis, taeniatus and cristatus (Urodela) (in collabo- ration with S. TOIVONEN) c. Experimental analysis of the gastrulation process (vital staining and transplantation). Xenopus laevis (Anura) d. Analysis of the neural induction and subsequent organization of the central nervous system (to be continued). Interaction of embryonic fields. Various Urodela (Amphibia) Nieuwkoop 66 Oka e. Analysis of the neural induction and subsequent organization of the central nervous system. Galliis domesticus (Aves) f. Further analysis of the relationship between the morphogenetic influence of the Li + ion and the respiration of the developing embryo. (Ascidia) g. Electron-microscopical analysis of induction and activation of the central nervous system. Gallus domesticus (Aves) h. Operation techniques. Gallus domesticus (Aves) NISHIHARA. T. A.B.. M.S.. Ph.D. — Dept of Zool., Univ. of CaHfornia. LOS ANGELES 24. Cal.. U.S.A. a. Serological studies of nuclei from various organs and its significance for the general theory of differentiation, (in collaboration with A. M. SCHECHTMAN) NISHIITSUTSUJI, Miss J. — Lab. of Embryol. and Exper. Morphol.. Zool. Inst., Dept of Sci., Kyoto Univ., KYOTO, Japan. (no data received on Nov. 1^*, 1952) NIU. M. C. Dr — Dept of Biol. Sci., Stanford Univ.. STANFORD. Cal.. U.S.A. a. The differentiation of macrophages into melanophores following their ingestion of pigmentary debris released by degeneration of preexisting melanophores. (Amphibia) (in collaboration with V. C. TWITTY) b. The transformation of differentiated xanthophores into typical melano- phores. (Amphibia) c. The migratory behaviour of single neural crest meianoblasts isolated in capillary tubes of extremely small bore. (Amphibia) (in collaboration with V. C. TWITTY) d. The role of mesodermal cells in epidermis formation. (Amphibia and Mammalia) e. New experiments on the origin of pigment cells. (Amphibia) NOVIKOFF. A. B. Ph.D., Prof. — Dept of Anat., Coll. of Med., Univ. of Vermont. BURLINGTON. Vt. U.S.A. (no data received over some years) NOESCH. H. DrSc. P.D. — Zool. Anstalt der Univ., Rheinsprung 9. BASEL, Schweiz. (no data received over some years) NYHOLM, K. G. Fil.Dr — Zool. Inst., Uppsala Univ., UPPSALA, Sweden. a. Study of the development. ( Echinoderidae, Aschelminthes) b. Study of the development. Labidoplax buskii ( Echinodermata) c. Study of the life-history of monothalamous forms. (Rhizopoda) O'BRIEN. B. R. A. — Dept of Histol. and Embryol, Univ. of Sydney, SYDNEY, N.S.W.. Austraha. a. Enzymatic pattern in normal and regenerating tissue in relation to capacity for. and rate of regeneration. (Annelida) O'BRIEN, J. P. Ph.D. — Dept of Biol., Marquette Univ., 1131 West Wis- consin Avenue, MILWAUKEE 3, Wis., U.S.A. (no data received on Nov. 1-', 1952) O'CONNOR, R. J. M.D., D.T.M. — Westminster Med. School. Horsferry Rd., LONDON S.W. 1. England (U.K.) a. The metabolism of cell division ond cell differentiation. (Vertebrata) b. Metabolic measurement during ontogenesis. (Aves) OKA, H. Ph.D. (Tokyo), Prof. — Inst, of Zool., Univ. of Education. Otsuka-Kubomachi 24, Bunkyoku, TOKYO, Japan. Oka 67 Ors a. Limb induction. Hynobius tokyoensis (Urodela) b. Experimental induction of strobilization. Policitor mutabilis f,. Com- pound" Ascidiae) c. Budding in various species, f', .Compound" Ascidiae) OKADA, T. — Lab. of Embryol. and Exp. Morphol., Zool. Inst.. Dept of Sci.. Kyoto Univ.. KYOTO, Japan. a. Developmental mechanism of entoderm differentiation. Triturus pyrrho- gaster and Hynobius nebulosus (Urodela) b. Role of the yolk mass in early morphogenetic movement. Triturus pyr- rhogaster and Hynobius nebulosus (Urodela) c. Regional differences of induced structure. OKAZAKI. Miss K. — Embryol. Section, Dept of Biol., Fac. of Sci., Tokyo Metropolitan Univ., Meguro-ku, TOKYO, Japan, a. Metamorphosis of partial larvae. Peronella (Clypeastroidea, Echinoidea) h. A study of skeleton formation. ( Echinodermata) OKSCHE, A. A. Dr Med. — Anat. Inst, der Univ., Robert Kochstr. 6. MARBURG/Lahn, Deutschland. a. Aenderungen des Kaulquappen-Wachstums nach beiderseitiger Augen- Extirpation. Es soil hierbei die Rolle des Hypophysen-Zwischenhirn- Systems und der Epiphyse untersucht werden. Bufo vulgaris (Anura) b. Die Feinstruktur der Sinneszellen des Organon frontale bei quahtativ und quantitativ modifiziertem Lichtreiz. Verhalten der spezifischen, mit Eisen-Hacmotoxyhn farbbaren Zellstrukturen wahrend des Individual- zyklus. Bu[o vulgaris (Larven) (Anura) OLIVO, O. M. Med. Dr, Ord. Prof. — 1st. di Istol. e Fisiol. gen.. Fac. di Med., Via Belmeloro 8. BOLOGNA, Italia, (no data received on Nov. 1^*, 1952) OLSSON R. Fil.mag. — Zootom. Inst., Univ. of Stockholm. 116 Drottning- gatan, STOCKHOLM. Sweden, a. Development and anatomy of the nuclei and merve fibers in the brain. Polypterus (Brachiopterygii) OMODEO, P. Dr Sc, — 1st. di Biol, e Zool. gen., Fac. di Med.. Piazza S. Agostino 4. SIENA. Italia. a. Embryology and teratology. (Oligochaeta) h. Gametogenesis and polyploidy. (Oligochaeta) c. Liver regeneration. (Urodela) OORT. J. — Lab. for Exper. Histol., Fac. of Med., Univ. of Leyden, Wassenaarseweg. Boerhaavekwartier. LEIDEN, Holland, a. Development of the anterior hypophysis. Larus ridibundus (Aves) OPPENHEIMER. Miss J. M. B.A.. Ph.D. — 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) ORLANDI, Miss A. Dott. Sci. Biol. — 1st. di Zool. e Anat. Comp., Univ. di Milano, Via Celoria 10, MILANO, Italia, a. Nucleoproteins and myosin. (Vertebrata) h. Nucleoproteins and chromosomes. (Arthropoda and Vertebrata) ORSKA, Miss J. Ph.D. — Zaklad Anat. Porownawczej. Inst. Zool. Uniw.. ul. Sienkiewicza 21. WROCLAW. Poland, a. Development of the vertebral column centra. (Salmonidae and Cyprino- dontidae, Teleostei) Ort 68 Parn ORTOLANI. Miss G. Dr— 1st. di Zool., Via Archirafi 18, PALERMO, Italia. a. The map of the presumptive organ territories in the germ. (Ascidiae, Urochordata) b. Structure and potencies of the egg before cleavage. (Ascidiae, Urochot' data) ORTS LLORCA, F. Prof. — Lab. de Anat. y Embryo!., Fac. de Med.. CADIZ, Spain. a. Embryology of the heart. (Mammalia) b. Embryologie of the lungs. (Mammalia) c. Cyclopy. Homo sapiens (Primates) OSAWA, S. M.A. (Rigakushi) — Biol. Inst., Fac. of Sci., Nagoya Univ., Chigusa-Ku, NAGOYA, Japan. a. Significance of glycogen utilization in the developing embryos, studied quantitatively. Tritmus pyrrhogaster (Urodela) (in collaboration with T. YAM AD A) b. Microphotomietric estimation of desoxyribonucleic acid in the nuclei of different presumptive regions of the developing eggs. (Vertebrata and Evertebrata) (in collaboration with T. YAM AD A, H. NAORA and A. SIBATANI) c. Biochemical and histological studies of oogenesis. Tritmus pyrrhogaster (Urodela) (in collaboration with Y. HAYASHI) OVERTON, Miss J. Dr — Dept of Zool., Univ. of Chicago, CHICAGO 37, 111., U.S.A. (no data received on Nov. \^\ 1952) PADOA. E. Dr, Prof. — 1st. di Biol, e Zool. gen., Fac. di Med., Piazza S. Agostino 4, SIENA, Itaha. (no embryological work in progress) PAI, S. F.I.I.E., Drrer. nat. — Lab. of Developm. Physiol., Inst, of Exper. Biol., Acad. Sinica, 865 Chang Ning Rd, SHANGHAI, China. (no data received on Nov. 1^^ 1952) PAI. Mrs TSENG MI B.Sc. — Lab. of Developm. Physiol., Inst, of Exper. Biol.. Acad. Sinica, 865 Chang Ning Rd, SHANGHAI, China. (no data received on Nov. 1^*, 1952) PARI. F. Dott. in Sci. — 1st. di Zool. e Anat. Comp. dell'Univ., Via A. Volta 4, PISA, Italia, a. Reproduction and cytology. (Rhabdocoela, Turbellaria) PARDI, L. Lib. Doc. — 1st. di Zool. e Anat. Comp. dell'Univ., Via A. Volta 4, PISA, Italia, a. Oviposition, parthenogenesis, cytology of italian races. Solenobia (Lepidoptera) PARIS, Miss A. |. — Zool. Lab. der Rijks Univ., Janskerkhof 3, UTRECHT, Holland, a. Analysis of lithium action. Limnaea stagnalis (Gastropoda) (in colla- boration with D. BOSSCHAERT, Miss C. H. M. BRAAT. Miss S. C. A. HAIJE, Miss A. H. LYESEN, J. H. W. NICOLAI. Chr. P. RAVEN. F. van RIJCKEVORSEL, and Miss L. G. de VRIES) PARMENTER, C. Ph.D., Prof. — Dept of Zool., Univ. of Pennsylvania, PHILADELPHIA 4, Pa, U.S.A. (no data received over some years) PARNELL. I. W. B.A., Ph.D. — Dept of Zool.. Univ. of Edinburgh, West Mains Rd, EDINBURGH 9, Scotland (U.K.) a. Effect of temperature and chemicals on the development of the free living stages. fBursate Nematoda) Pas 69 Pen PASCHMA, M. M.Ph. — Zaktad Zool. Ogolnej. Inst. Zool. Uniw. we Wroctawiu, ul. Sienkiewicza 21, WROCLAW, Polska (Poland), (no data received on Nov. 1**, 1952) PASQUINI, P. Ph.D., Prof. — Inst, di Anat. Comp., Via Belmeloro 8, BOLOGNA (103), Italia. a. Effects of antimitotics on early development and on lens-regerenation. Rana esculenta, Triton and Ambystoma (Amphibia) (in collaboration with Miss I. DE CESARE) b. Effects of antimitotics on the regeneration of peripheral nerves. (Urodela and Anura) (in collaboration with S. LEGHISSA) c. Effects of low temperature on early development. (Amphibia) (in colla- boration with L. RAUNICH) PASSALACQUA, Miss A. Dr— 1st. di Zool, Via Archirafi 18, PALER- MO, Italia. a. Combined xenoplastic explantations of gastrula fragments. (Amphibia) b. Development of eggs treated with SCN salts. (Ascidiae, Urochordata) PASTEELS, J. J. F.I. I.E., M.D., Agr. Ens. sup.. Prof. — Lab. d'Anat. et d'Embryol., Fac. de Med. de I'Univ., 97 Rue aux Laines, BRUXELLES. Bislgique. a. General survey of development. Chrysemis, Pseudemys, Chelone (Che- Ionia), Chamaeleo, Mabuya (Sauria) b. Cytochemical observations on the first developmental stages. (Amphibia) (in collaboration with J. BRACHET) c. Photometric quantitative determinations of desoxyribonucleic acid (D.N. A.) in resting cells, mitosis, spermatogenesis and development, (in collaboration with L. LISON) d. The early development from late neurula stage to an advanced tailbud stage (esp. morphological data for experimental work). Xenopus laevis (Anura) (Normal Table) PATANE', L. Dr, Aiuto — 1st. di Zool. e Anat. comp.. Via Androne 25, CATANIA. Italia. (no data received on Nov. l''*, 1952) PATTEN, B. M. Ph.D., Prof. — Dept of Anat.. Med. School. Univ. of Michigan. 2500 East Med. Bldg, ANN ARBOR. Mich.. U.S.A. (no data received over some years) PEASE, D. C. Dr. Prof. — Dept. of Zool., Coll. of Phys. and Surg.. Co- lumbia Univ., NEW YORK City, N.Y., U.S.A. (no data received) PEHRSON, G. T. Dr Phil, Prof. — Zootom. Inst., Univ. of Stockholm, 116 Drottninggatan, STOCKHOLM, Sweden. a. Development and morphology of the skull and of the lateralis system. (Osteoglossidae and Characinidae, Teleostei) h. Ontogeny of the skull. Polypterus (Crossopterygii) t PENNERS, A. F.I. I.E., Prof. — Zool. Inst, der Univ., Naturw. Fak., Ront- genring 10, WORZBURG, Deutschland. (the undermentioned investigations are carried on at the Institute by his collaborators) a. Regeneration auf verschiedenen Altersstadien. Tubifex tivulorum (Cli- tella, Oligochaeta) h. Cytochemische Untersuchungen der Oogenese und Spermatogenese. Tubifex nvulorum (Clitella, Oligochaeta) c. Beeinflussung der Regeneration durch Naphtachinon und Phenanthren- chinon. Tubifex nvulorum (Clitella, Oligochaeta) Penners 70 Pia d. Entwicklung des Eies unter Beeinflussung durch Colchicin und Ront- genstrahlen. Cyclops viridis (Copepoda) PENTZ. Miss K. M.Sc. — Zool. Inst., Univ. of Stellenbosch, STELLEN- BOSCH. S. Africa, a. Ontogenesis of the skull. Hynobius [uscus (Urodela) PEPERNIK. Mrs V. — Dept of Zool., State Univ. of Iowa, IOWA CITY. Iowa, U.S.A. a. The development of the optic tectum following repeated crushing of the optic nerve. Xenopus (Anura) (in collaboration with J. J. KOLLROS) PERLMANN, H. P. — Wenner-Grens Inst, for experimental Biology, Norr- tullsgatan 16, STOCKHOLM Va.. Sweden. a. Serological and chemical studies on the proteins of developing eggs. Paracentrotus lividus and Arbacia lixula ( Echinoidea) PERRI, T. Dott., Prof. — 1st. di Anat. comp. dell'Univ., Fac. di Sci., Via Borelh 50, ROMA, ItaHa. (no data received on Nov. 1^', 1952) PERRY, J. H. Ph.D., Prof. — Dept. of Anat., Coll. of Med., Baylor Univ., 1200 M.D. Anderson Blvd, Texas Med. Center, HOUSTON 5, Tex.. U.S.A. (no data received over some years) PESONEN, S. K. Drfil. — Womens Clinic of Helsinki, HELSINKI. Finland. a. On the effect of some proteins on the further development of chemically activated egg-cells. Mas norvegicus albinus (Rodentia) b. Fertilization. Mus norvegicus albinus (Rodentia) PETER, K. F.I.I.E., Dr. Prof. (Emer.) — BIRKENSTEIN, Post FISCH- BACHAU, Oberbayern, Deutschland. (no data received) PETZOLD, R. — Dept of Zool.. Univ. of Chicago. CHICAGO 37. 111.. U.S.A. (no data received on Nov. 1**, 1952) PFLEGER, Miss D. Lie. es Sc. — Lab. de Zool. de la Fac. des Sci et Lab. d'Embryol. et Teratol. exper. du C.N.R.S., Inst, de Zool. et de Biol. gen., 12 Rue de I'Universite, STRASBOURG, France, a. Role des hormones dans la differenciation sexuelle. Etudes biochimiques sur la regression des canaux de Miiller. Gallus (Aves) PFLUGFELDER, O. Dr rer.nat.. Prof. — Zool. Inst, der Landwirtschaftl. Hochschule, STUTTGART-HOHENHEIM (Ha), Deutschland. a. Tumorentstehung nach Storung des Hormonhaushalts. (Evertebrata und Vertebrata) b. Einfluss der Pinealektomie auf die Postembryonalentwicklung. Leb^stes reticulatus Peters (Cyprinodontidae, Teleostei) c. Schwanzmissbildungen. Anas, Gallus (Aves) PHILLIPS, Miss R. J. S. B.Sc. — Med. Res. Council, Inst, of Anim. Genet., King's Buildings, West Mains Rd, EDINBURGH 9, Scotland (U.K.) a. Developmental study of a new fifth-toe Polydactyly and urogenital abnormalities in a stock of mice. Mus musculus (Rodentia) PIATT. J. A.B., M.A., Ph.D., Assoc. Prof. — Dept of Anat., School of Med.. Univ. of Pennsylvania. PHILADELPHIA 4. Pa, U.S.A. (no data received over some years) Pie 71 Que PIEPHO, H. Dr Phil.. Prof. — Zool. Inst, der Univ. Gottingen, Mathem.- Naturw. Fak.. Nikolausbergerweg 75, GOTTINGEN, Deutschland. a. Metamorphose. Galleria mellonella (Lepidoptera) PINCUS, G. Dr, Prof. — Worcester Foundation for Exper. Biol., 222 Maple Ave. SHREWSBURY, Mass.. U.S.A. a. Physiology of reproduction. (Mammalia) b. Early development of eggs. (Mammalia) PISANO. A. Dr. Biol. Sc. — Inst, de Zool., Univ. Nac. de Tucuman, Miguel Lillo 205, TUCUMAN, Argentina, S. America. (no data received over some years) PLANQUE, B. A. de M.Sc. — Hubrecht Lab., Internal. Embryol. Inst.. Janskerkhof 2. UTRECHT, Holland, a. Regulation potencies in the neural plate. Formation of neural crest by regulation after implantation of young neural plate tissue in the ventral side of neurulae, or by homogenetic induction after implantation in middle gastrulae (heteroplastic transplantation). Tritutus taeniatus, alpesttis and cristatus (Ucodela) PLETZEN, R. van D.Sc. (Stellenbosch) — Dept of Zool., Univ. of O.F.S.. BLOEMFONTEIN. South Africa. a. Ontogenesis of skeleton and muscles of shoulder girdle and forelimbs. Xenopus laevis (Anura) (Normal Table) PORTMANN. A. Dr Phil., Prof. — Zool. Anstalt der Univ., Rheinsprung 9, BASEL, Schweiz. (no embryological work in progress) POULSON. D. F. Ph.D., Prof. — Osborn Zool. Lab.. Yale Univ.. NEW HAVEN 11, Conn., U.S.A. (no data received over some years) PRETO PARVIS, Mrs V. Dott. Med.. Prof. — 1st. di Anat. umana norm. dell'Univ. di Milano. Via Mangiagalh 31, MILANO, Italia. a. Modifications of contents in nucleinic acids and of the nuclear apparatus in nervous cells during development in relation with their degree of growth and functional maturity. (Methods: Piekarsky-Robinow; Feulgen; Golgi; Cajal) (Mammalia) b. Study of the development of cytoarchitecture and genesis of the furrows in some areas of the cerebral cortex. Homo and Felis (Mammalia) c. Morphological and histochemical studies of histogenesis of chondroid and mucous tissues. (Aves and Mammalia) d. Histochemical study of histogenesis of cartilage. Mus rattus (Rodentia) (in collaboration with G. RONCORONI) PRIESCHING, A. M.D. — Anat. Inst, der Univ. Wien. Wahringerstr. 13, WIEN IX. Oesterreich. a. Development of peritoneal folds and adhesions separating different parts of the bursa omentalis. Homo sapiens (Primates) PRINS, F. X. M.Sc — Zool. Inst., Univ. of Stellenbosch, STELLEN- BOSCH, S. Africa. a. Ontogenesis of the vertebral column. Spheniscus demetsus (Aves) PROP, N. B.Sc. — Anat.-Embryol. Lab. der Rijks Univ., Ooster- singcl 69, GRONINGEN, Holland, a. Development of the egg by means of vital staining. Ambystoma (Urodela) QUERNER, H. Dr rer.nat. — Inst, fiir Entwicklungsphysiol. der Univ. Koln, Amsterdamerstr. 36, KoLN-Riehl, Deutschland. Querner 72 Raw a. Hormonphysiologische Uuntersuchungen. (Cyprinodontidae, Teleostei) b. Untersuchungen iiber Wachstum und Sexualitat. (Annelida) RABISCHONG. J. Lab. d'Anat.. Inst. Anat., Fac. de Med., 31 Rue Lion- nois, NANCY (Meurthe & Moselle), France, a. Organogenese de I'articulation du coude. Homo (Primates) (en colla- boration avec A. A. BEAU) RADECKA, Mrs E. M.Ph. — Zaklad Zool. Ogolnej. Inst. Zool., Uniw. we Wroclawiu, ul. Sienkiewicza 21, WROCLAW, Polska (Poland), (no data received on Nov. 1^*. 1952) RAMSEY, Miss E. M. A.B., M.D. — Dept of Embryol., Carnegie Inst, of Washington, Wolfe and Madison Strs, BALTIMORE. Md, U.S.A. a. Placentation. Study of marginal sinus and venous drainage of placenta. Macaca mulatta (Primates) RAMULT, M. Ph.D. — Dept of Zool.. Univ. of Edinburgh. West Mains Rd. EDINBURGH 9, Scotland (U.K.) a. The later stages of development and growth. (Turbellaria) RANDALL, J. T. Prof., F.R.S. — M.R.C. Biophysics Res. Unit, King's Coll., Strand, LONDON W.C. 2, England, (no data received over some years) RANZI, S. F.I.I.E., Dott. Sci. Nat., Prof. — 1st. di Zool. e Anat. Comp., Univ. di Milano. Via Celoria 10, MILANO, Italia, a. Proteins in embryonic development. (Echinodermata) , (Amphibia) and Gallus domesticus (Aues) RAPPAPORT Jr., R. B.S.. M.S.. Ph.D. — Biol. Dept, Union Coll., SCHENECTADY 8. N.Y.. U.S.A. a. Uptake of water in the development of tissues. Rana pipiens and Ambys- toma punctatum (Amphibia) RAUNICH. L. Ph.D., M.D. — 1st. di Anat. Comp., Via Belmeloro 8, BOLOGNA (103). Italia, a. Development of blood and vascular system. Petromyzon (Cyclostomota, Pisces), Amia and Lepidosteus (Holostei, Pisces) h. Action of growth-substances on tail-regeneration. Rana, Bufo (Anura) c. Determination of neural plate. Triton, Ambystoma (Urodela) d. Neural crest development. (Amphibia) e. Effect of low temperature on early development. (Amphibia) (in col- laboration with P. PASQUINI) f. Action of carcinogenic hydrocarbons. (Amphibia) RAVEN. Chr. P. F.I.I.E. F.R.A., Dr Sc, Prof. — Zool. Lab. der Rijks Univ., Janskerkhof 3; Hubrecht Lab., Internal. Embryol. Inst.. Janskerk- hof 2, UTRECHT, Holland. a. Development of cranial nerves. Xenopus laevis (Anura) (Normal Table) b. Analysis of lithium action. Limnaea stagnalis (Gastropoda) (in colla- boration with D. BOSSCHAERT. Miss C. H. M. BRAAT, Miss S. C. A. HAIJE. Miss A. H. LYESEN, J. H. W. NICOLAI. Miss A. J. PARIS, F. van RIJCKEVORSEL. and Miss L. G. de VRIES) c. Influence of Hthium on morphogenesis. Aplysia limacina (Gastropoda) RAWLES. Miss M. E. Ph.D. — Dept of Biol., The Johns Hopkins Univ., Charles and 34th Strs, BALTIMORE 18. Md. U.S.A. a. Analysis of the development of regional differences in feather color pattern. Factors affecting the distribution and development of melanin pigment-forming cells. Gallus domesticus (Aves) Rawles 73 Reyn b. Analysis of the processes involved in the development of pigmentation and pigmentation patterns in the hair and skin. Mus spec. (..Hooded rat") and Mus spec. (..C57" Black Mouse) (Rodentia) c. The origin and development of the dermis. Gallus domesticus (Aves) and Mus spec. (,,C57" Black Mouse) (Rodentia) d. The origin and development of the trunk musculature. Gallus domesticus (Aves) RAYNAUD, A. Dr es Sc. — Lab. d.'Embryol. du Lab. Pasteur de I'lnst. du Radium, 26 Rue d'Ulm, PARIS Ve, France. (no data received over some years) REEVE, E. C. R. B.A., Ph.D. — Inst, of Anim. Genet., Univ. Dept of Genet., King's Buildings. West Mains Rd, EDINBURGH 9, Scotland (U.K.) a. Developmental study of hnes selected for large and small body size. Drosophila melanog aster (Insecta) (in collaboration with F. W. ROBERTSON) REINBOLD. R. Lie. es Sc. — Lab. de Zool. de la Fac. des Sci. et Lab. d'Embryol. et Teratol. exper. du C.N.R.S.. Inst, de Zool. et de Biol. gen.. 12 Rue de I'Universite, STRASBOURG, France, a. Differenciation sexuelle normale et conditionnement hormonal du tuber- cule genital chez I'embryon. Gallus (Aves) REIS R. H. Ph. D. — Dept of Biol.. Marquette Univ., 1217 West Wis- consin Ave, MILWAUKEE 3, Wis.. U.S.A. a. A study of the anomalous renal vessels and inferior vena cava. Canis familiaris and Felis domestica (Carnivora) REMOTTI, E. Prof. — Inst, di Anat. e Fisiol. comp., Univ. di Genova, GENOVA, Italia. (no data received over some years) REVERBERI. G. F.I.I. E., Dr, Prof. — 1st. di Zool., Via Archirafi 18, PALERMO, Itaha. a. The morphogenetic role of the yolk material, studied by means of hete- rospecific transplantations and of treatment with chemical substances. (Amphibia) b. Investigations on overripe eggs. (Ascidiae, Urochordata) REYER, R.^W. Ph.D. — Dept of Anat.. School of Med.. Univ. of Pitts- burgh, PITTSBURGH 13, Pa. U.S.A. a. An experimental 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, Salamandra salamandra, Amby stoma punctatum (Urodela) (in collaboration with L. S. STONE, New Haven) b. A study of lens induction: an analysis of lens induction in terms of the duration of lens inducing capacity in the eye anlage and of lens compe- tence in the flank ectoderm. Triturus viridescens, Ambystoma punctatum (Urodela) REYNOLDS. S. R. M. A.B., M.A., Ph.D.; D.Sc, Dr hon. causa (Univ. Catol. de Chile) — Dept of Embryol., Carnegie Inst, of Washington, Wolfe and Madison Strs, BALTIMORE 5. Md. U.S.A. a. Fetal vascular physiology. Homo, Lepus and Ovis (Mammalia) b. Uterine contraction patterns. Homo (Primates) c. Pulmonary vasculature, fetal and neonatal condition. Ovis (Artiodac- tyla) Reynolds 74 Rock d. Architecture of umbilical blood vessels, distended and non-distended. Homo (Primates) RHODES. Mrs M. B. B.S. — Dept of Genet.. Coll. of Agric. Univ. of Connecticut, Storrs Agric. Exper. Stat.. STORRS. Conn., U.S.A. a. Effects of experimental treatments (insulin, eserine sulfate, sulfanila- mide, nicotinamide, riboflavin etc.) on the succinic dehydrogenase system of embryos. Galliis domesticus (Aves) RHODES, S. A. M.A. — Franklin College, FRANKLIN, Ind., U.S.A. a. Lens induction. Rana clamitans, Rana catesbiana (Anura) b. A cytological and histochemical study of lens development. Rana cates- biana, Rana clamitans (Anura) RICHTER, K. M. B.A., M.A., Ph.D.. Assoc. Prof. — Dept of Anat., School of Med., Univ. of Oklahoma, OKLAHOMA CITY, Okla., U.S.A. a. Studies on the influence of carcinogenic substances on development. Gal- lus domesticus (Aues) b. Experimental studies on the influence of carcinogenic substances on the growth of the embryonic heart in culture. Gallus domesticus (Aves) c. The anatomy of a new 14 day old embryo. Homo sapiens (Primates) d. Revision of Work-text on Human Embryology, by Richter. K.M. RIDLEY. Miss E. J. M.S. — Dept. of Biol. Sci., Univ. of Pittsburgh, PITTSBURGH 13, Pa, U.S.A. (no data received over some years) RIJCKEVORSEL. F. van — Zool. Lab. der Rijks Univ.. Janskerkhof 3, UTRECHT. Holland, a. Analysis of lithium action. Limnaea stagnalis (Gastropoda) (in colla- boration with D. BOSSCHAERT. Miss C. H. M. BRAAT, Miss S. C. A. HAIJE. Miss A. H. LEYSEN, J. H. W. NICOLAI. Miss A. J. PARIS. Chr. P. RAVEN and Miss L. G. de VRIES) RINALDINI. L.M. — Strangeways Research Lab., Wort's Causeway, CAM- BRIDGE, England (U.K.) a. The synthesis of ascorbic acid in embryos. (Aves and Mammalia) RISLEY, P. L. A.B., M.S., Ph.D., Prof. — Dept. of Biol., Univ. of Oregon, EUGENE, Ore., U.S.A. (no data received over some years) RIZZOLI, C. M.D., Dr — 1st. di Istol. e Fisiol. gen., Fac. di Med.. Via Belmeloro 8, BOLOGNA, Itaha. (no data received on Nov. 1^*, 1952) ROBERTSON, F. W. B.Sc, Ph.D. — Inst, of Anim. Genet., Univ. Dept of Genet. King's Buildings, West Mains Rd, EDINBURGH 9, Scotland (U.K.) a. Developmental study of lines selected for large and small body size. Drosophila melanogaster (Insecta) (in collaboration with E. C. R. REEVE) ROBERTSON, G. G. Ph.D., Prof. — Dept of Anat., Coll. of Med.. Baylor Univ., 1200 M. D. Anderson Blvd, Texas Med. Center, HOUS- TON 5, Tex., U.S.A. (no data received over some years) ROCK, J. M.D. — Free Hospital for Women, 245 Pond Ave, BROOK- LINE, Mass., U.S.A. — Harvard Univ., Med. School, Dept of Pathol., 25 Shattuck Str., BOSTON 15, Mass., U.S.A. a. Development of ova from fertilization to 14-days (first missed menstrual period). Homo (Primates) (in collaboration with A. T. HERTIG and W. J. MULLIGAN) Rock 75 Ross b. A morphologic description of 3 segmenting embryos; a 2-ccll tubal ovum, a 50-cell early blastula (4 days-uterine), and a 100-ccll blastula (4j/^ — 5 days-uterine). Homo (Primates) (in collaboration with A. T. HER- TIG and W. J. MULLIGAN) ROGERS. K. T. A.B., M.A. — Dept of Anat. Med. School, Univ. of Michigan. 2500 East Med. Bldg, ANN ARBOR, Mich., U.S.A. (no data received over some years) ROLLHAUSER. H. Dr Med. — Anat. Inst, der Univ., Robert Kochstr. 6. MARBURGLahn, Deutschland. a. Aenderungen in der Ultrastruktur der Sehnen nach Lahmung des zuge- horigen Muskels und nach Wiederherstellung der Funktion. Es wird die Beziehung zwischen Feinbau und Beanspruchung der Sehnen unter- sucht in alien Altersstadien von der Geburt an. Cauia cobaya (Rodentia) 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 denselben heterogenen Induktor. Behandlung der Gastrulae mit Hormonen, NaF, Butylalkohol u.a. Mit dem isolierten Ektoderm dieser Gastrulae werden Stiicke erwachsener Triton-Leber umhiillt. Triton alpestris (Urodela) RONCORONI, G. — 1st. di Anat. umana norm. dell'Univ. di Milano, Via Mangiagalh 31, MILANO, Italia, a. Histochemical study of histogenesis of cartilage. Mas rattus (Rodentia) (in collaboration with Mrs V. PRETO PARVIS) ROOFE. P. G. Ph.D., Prof. — Dept of Anat., Univ. of Kansas, LAW- RENCE. Kansas. U.S.A. a. Cytochemical and microchemical study of the developing nervous system and its relationship to developing behaviour patterns. Ambystoma macu- latum (Urodela) (in collaboration with Mrs E. L. WENGER) ROOSEN-RUNGE, E. C. M.D. — Dept of Anat., School of Med., Univ. of Louisville. 101 West Chestnut Str., LOUISVILLE 2, Ky, U.S.A. a. Quantitative studies in spermatogenesis. (Mammalia) ROSE, J. M. — Dept of Pathol., Coll. of Med., Baylor Univ., 1200 M.D. Anderson Blvd, Texas Med. Center, HOUSTON 5, Tex.. U.S.A. a. An investigation dealing with the transplantability of Hodgkin's Disease Tissue in foreign species, using growth stimulating substances and modi- fying the donor tissue in various ways, (in collaboration with B. L. NEWTON and D. ZACKRY) ROSE. S. M. Ph.D., Assoc. Prof. — Dept of Zool., Univ. of Illinois, URBANA, 111., U.S.A. (no embryological work in progress) ROSENBAUM, R. M. B.S. — Biol. Lab., Harvard Univ., CAMBRIDGE 38, Mass. U.S.A. (no data received over some years) ROSIN, S. Dr, P.D. — Zool. Inst, der Univ. Bern. Sahlistr. 8, BERN, Schweiz. a. Borstenmuster und Fliigelentvv-icklung. Drosophila (Insecta) (in Zusammenarbeit mit W. NEF) ROSS. Miss J. R. W. B.Sc, M.B., Ch.B. — Dept. of Anat.. Charing Cross Hosp. Med. School, 62 Chandos Place. LONDON W.C. 2, England (U.K.) (no data received on Nov. 1^', 1952) Rossi 76 Runns ' ROSSINI. Miss M. C. Ph.D. — 1st. di Anat. Comp.. Via Belmeloro 8, BOLOGNA (103). Italia, a. Action of podophyllin on early development. Rana (Anura) 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.): comportement hereditaire et physiologic genetique. (Amphibia) c. Modifications des noyaux au cours de I'ontogenese. (Amphibia) d. Survie de I'ovule in vitro, a basse temperature. (Amphibia) ROTHFELS, U. Ph.D. — Dept of Pediatrics, Med. School, Univ. of Colo- rado, 4200 East Ninth Ave, DENVER 7, Col.. U.S.A. a. Study of differentiation of somites in explants (Spratt technique). Gal- lus (Aves) (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. L. LUBCHENKO and J. MACKENZIE) R02EWSKA, Miss J. W. Physician — Inst, of Histol. & Embryol., Acad, of Med., Narutowicza 60, LODZ, Poland. a. Influence of sulphonamides on the development of germinal layers. Gallus (Aves) b. Influence of sulphonamides on the size of embryos. Gallus (Aves) RUDEWICZ. Mrs Cz. Physician — Inst, of Histol. & Embryol., Acad., of Med., Narutowicza 60, LODZ, Poland. a. Influence of sulphonamides on the structure of cell nuclei. Gallus (Aves) b. Influence of sulphonamides on the size of embryos. Gallus (Aves) RUDNICK, Miss D. Ph.D. — Osborn Zcol. Lab., Yale Univ.. NEW HAVEN 11, Conn.. U.S.A. a. Histo- and cytogenesis of early embryonic tissues. Gallus (Aves) h. Protein-synthesising mechanisms in development. Gallus (Aves) RUGH, ROBERTS A.B.. M.A., Ph.D. — Radiological Research Lab., Dept of Radiology, Coll. of Physicians & Surgeons, Columbia Univ., NEW YORK 32, N.Y.. U.S.A. a. Radiobiology. , b. Experimental Embryology. RUNNER. M. N. Ph.D. — Roscoe B. Jackson Mem. Lab.. BAR HAR- BOR. Me. U.S.A. a. Naturally occurring congenital abnormalites in inbred mice studied as ,. environmental indicators". Mus musculus (Rodentia) b. Factors influencing the survivability of transplanted ova. Mus musculus c. Inherited susceptibility to environmental influences during prenatal deve- lopment. Mus musculus (Rodentia) d. Inheritance of hormonal balance of the ovary and pituitary during adolescence. Mus musculus (Rodentia) RUNNSTROM. J. A. M. F.I.I.E.. Ph.D.. M.D., Prof. — Wenner-Grens Inst, for experimental Biology, Norrtullsgatan 16. STOCKHOLM Va.. Sweden, a. (Cf. work on the Institute). Physiology of fertihzation and development. ( Echinodermata) Runnstrom 11 Saun b. Analyzation of the nature of the egg antifertihzin. (Echinodermata) (in collaboration with A. MONROY) c. Action of periodate on the egg surface. (Echinoidea) (in collaboration with G. KRISZAT) d. Action of SH-reagents on the development. (Echinoidea) e. The action of fertilizin. (Echinoidea) RUUD. Miss G. Cand. real. — Zool. Lab., Univ. of Oslo, BLINDERN, Norway. (no data received on Nov. l'^', 1952) RYKE. P. A. J. M.Sc. — Dept van Dierk., Potchefstroom Univ.. POT- CHEFSTROOM, Suid-Afrika. (stud.: Sool. Inst., STELLENBOSCH) a. The ontogenesis of skeleton and muscles of the trunk region. Xenopus laevis (Anura) SABBADIN, A, Dr — 1st. di Zool. e Anat. comp., Fac. di Sci., Via Loredan 6. PADOVA, Italia. a. Differentiation of gonads. (Amphibia) b. Sex differentiation. (Ascidiae, Urochordata) SACERDOTE, Miss M. Dr — Inst, of Comp. Anat., Via Giovanni Gio- litti 34, TORINO, Italy, (no embryological work in progress) SALZGEBER, Miss B. Lie. es Sci. — Lab. de Zool. de la Fac. des Sci. et Lab. d'Embryol. et Teratol. exper. du C.N.R.S., Inst, de Zool. et de Biol, gen., 12 Rue de I'Universite, STRASBOURG. France. a. Recherches sur Taction d'agents physiques et chimiques sur la differen- ciation sexuelle. b. Recherches sur I'intersexualite experimentale produite par irradiation aux rayons X. (Aves) (en collaboration avec Et. WOLFF) SANDISON. Miss E. E. B.Sc. — Dept of Zool., Univ. of Edinburgh. V/cst Mains Rd. EDINBURGH 9. Scotland (U.K.) a. The identification of the Nauplii of some South African forms with notes on their life histories. (Cirripedia) SANTLER. Miss J. E. B.Sc. — Dept of Embryol.. Univ. Coll. London. Gower Str.. LONDON W.C. 1, England (U.K.) a. Regeneration and induced proliferation in the adult. Rattus norvegicus (Rodentia) (in collaboration with M. ABERCROMBIE) SANYEL, S. — Cell Research Unit., Chittranjan Cancer Hospital. CAL- CUTTA 26. India, a. Phase contrast study of denuded corneal cells after beta ray treatment and their reaction to sub-lethal cytolysis. Mus musclus (Rodentia) (in collaboration with S. MOOKERJEE) SATO. T. D.Sc. Dr phil.nat..Prof. — Biol. Inst., Fac. Sci.. Nagoya Univ.. Chigusa-Ku. NAGOYA. Japan, a. Linsenbildende Potenz des Pigmentepithels. Hynobius tokyoensis und Tritiirus pyrrhogaster (Urodela) h. Linsenregeneration. Cobitidinae f'und verwandte Teleostei) SAU\^DERS, J. W. Ph.D. — Dept of Biol., Marquette Univ., 1217 West Wisconsin Ave. MILWAUKEE 3, Wis., U.S.A. a. Identification of prospective pigment cells. Gallus domesticus (Aves) and Mus musculus (Rodentia) b. Factors affecting the rate of melanin synthesis in embryonic tissues. Gallus domesticus (Aves) and Mus musculus (Rodentia) c. The role of the ectoderm in the development of the wing. Gallus domes- ticus (Aves) Saunders 78 Schnet d. An analysis of the factors affecting tract-specificity in embryonic feather areas. Gallus domesticus (Aves) e. Effect of temperature on X-ray resistance of embryonic tissues. Gallus domesticus (Aves) and Mus musculus (Rodentia) SAUSER. G. Dr, Dr, Mr, Prof. — Histol.-Embryol. Inst, der Univ. INNS- BRUCK. Tyrol Austria. a. Morphomechanik. Homo (Primates) h. Histophysiologie und quantitative Cytologic. c. Farbungs- und Konservierungstechnik. Homo (Primates) SAWIN, P. B. Sc.D., Prof. — Roscoe B. Jackson Memorial Lab., Box 558, BAR HARBOR. Me. U.S.A. (no data received on Nov. 1^*, 1952) SCARANO, E. Dr — 1st. di Anat. comp.. Univ. di Palermo, PALERMO. Italy. (no data received on Nov. l^S 1952) SCHECHTMAN, A. M. F.I.I. E.. A.B., Ph.D.. ProL — Dept of Zool., Univ. of Cahfornia. LOS ANGELES 24, Cal., U.S.A. a. Surface active materials: quantitative changes during the course of deve- lopment. b. Serology of serum in the developing embryo. Gallus domesticus (Aves) (in collaboration with A. O. SCHJEIDE) c. Electrophoresis of liver extracts during development and carcinogenesis, (in collaboration with H. HOFFMAN) d. Serological studies of nuclei from various organs and its significance for the general theory of differentiation, (in collaboration with T. NISHIHARA) e. Studies of the lipid in the serum of the developing embryo. Gallus domes- ticus (Aves) (in collaboration with E. WELLER) f. Biological characteristics of the developing serum of the embryo. Gallus domesticus (Aves) (in collaboration with P. KNIGHT) g. Electrophoresis of serum of the developing embryo. Gallus domesticus (Aves) SCHENK, R. DrMed. — Anat. Inst, der Univ. Gloriastr. 19. ZURICH, Schweiz. a. Ein junger Embryo mit 4 Somiten in situ. Homo (Primates) b. Ein Fall von Craniorachischisis. dargestellt im Lichte entwicklungs- physiologischer Ergebnisse. Homo (Primates) c. Der Einfluss von Nitrogen mustard auf die Furchung von Eiern. Pleu- rodeles (Urodela) (in Zusammenarbeit mit J. RICKENBACHER) SCHJEIDE, A. E. A.B., M.S.. Ph.D. — Dept of Zool. (Atomic Energy Project). Univ. of Cahfornia. LOS ANGELES 24, Cal. U.S.A. a. Serology of serum in the developing embryo. Gallus domesticus (Aves) (in collaboration with A. M. SCHECHTMAN) SCHNEIDER. R. Dr med. — Dr Senckenberg. Anat. Inst.. Med. Fak. der Univ.. Ludwig Rehnstr. 14. FRANKFURT/Main Siid, Deutschland. a. Development of the skull. Bradypus tridactylus (Edentata. Mammalia) SCHNETTER. M. Dr phil. — Zool. Inst, der Univ., Katharinenstr. 20, FREIBURG i.Brsg., Deutschland. a. Differenzierungsleistungen isolierter Eiteile in der Embryonalentwick- lung. Apis mellifica (Hymenoptera) b. Die Bedeutung des Dottersystems in der Embryonalentwicklung. Apis mellifica (Hymenoptera) Scho 79 Seng SCHOTTe, O. E. Dr. Prof. — Dept of Biol., Amherst Coll., AMHERST, Mass.. U.S.A. (no data received) SCHREIBER, B. Dott. Sci. Nat., Prof. — 1st. di Zool. e Anat. Comp.. Univ. di Milano, Via Celoria 10, MILANO, Italia, a. Bone induction. (Amphibia) SCHUURMANS, A. J. — Zool. Lab. der Rijks Univ., Janskerkhof 3, UTRECHT. Holland, a. Development of the saccus vasculosus. Scyllium canicula (Selachii) SCHWARTZ, v.— Max Planck-Inst. fiir Biol., Spemannstr. 34, TUBIN- GEN. Deutschland. a. Ontogenese des Fliigelmusters. Plodia (Lepidoptera) SCOTT, A. C. Ph.D. — Union Coll., SCHENECTADY 8, N.Y., U.S.A. (no data received over some years) SEDRA, Shokralla N. B.Sc, M.Sc. Ph.D., F.Z.S. — Dept of Zool.. Farouk I Univ.. Moharram Bey. ALEXANDRIA, Egypt. a. Stages in normal development. Bu[o regularis (Anura) b. The development of skull and visceral muscles during metamorphosis. Xenopus laevis (Anura) (Normal Table) c. The metamorphosis of the hyobranchial skeleton. Bufo regularis (Anura) (in collaboration with Milad I. MICHAEL) SEIDEL, F. DrPhil., Prof. — Max Planck-Inst. f. Tierzucht und Tier- ernahrung. (20a) MARIENSEE Kreis NEUSTADT a. Rubenberge (Brit. Zone). Deutschland. a. Morphologische und physiologische Untersuchungen an der embryonalen Entwicklung. Oryctolagus cuniculus (Rodentia) b. Morphologische und physiologische Untersuchungen an der embryo- nalen Entwicklung. Platycnemis (Diptera), Gryllus (Orthoptera) und Ascaris (Nematoda) SELMAN, G. G. Ph.D. — Inst, of Anim. Genet.. Univ. Dept of Genet. King's Buildings, West Mains Rd, EDINBURGH 9. Scotland (U.K.) a. Study of the effects of destroying the primary organisation of mosaic and regulation eggs by ultrasonic treatment. (Amphibia), (Insecta), (Inver- tebrata) h. Some measurem.ent of morphogenetic forces and the mechanical properties of the tissues concerned. (Amphibia) c. Induced haploidy. (Amphibia) d. Attempts to isolate proteins and protein derivatives from embryos by ionophoresis. (Amphibia) (in collaboration with Miss E. M. DEU- CHAR) e. Parthenogenesis. (Mammalia) (in collaboration with R. A. BEATTY) SEMBRAT. K. Ph.D.. Prof. — ZaHad Zool. Ogolnej, Inst. Zool. Uniw. we Wroctawiu, ul. Sienkiewicza 21. WROCLAW, Polska (Poland). (no data received on Nov. 1^', 1952) SEMBRATOWA. Mrs Z. M.D.. Prof. — Zaklad Histol. i Embryol.. Akad. Medycznej. ul. Chalubinskiego 6a, WROCLAW, Polska (Poland) (no data received on Nov. 1^', 1952) SENGEL, Ph. }. Lie. es Sc. — Lab. de Zool. de la Fac. des Sci. et Lab. d'Embryol. et Teratol. exper. du C.N.R.S., Inst, de Zool.. et de Biol. gen., 12 Rue de I'Universite, STRASBOURG, France, a. Sur les conditions de la regeneration normale du pharynx. Dugesia (^==Euplanaria) lugubris O. Schm. (Tricladidea, Turbellaria) Sengel 80 Sin b. Developpement du systeme nerveux de rembryon en cultures in vitro. Gallus (Aues) SENSENIG, E. C. B.A.. M.S., Ph.D., Prof. — Univ. of Alabama, Med. Center. BIRMINGHAM 5. Alabama, U.S.A. a. Development of the vertebral canal and its contents. Homo sapiens (Primates) h. Developmental anomahes of the vertebrae, meninges and spinal cord. Homo sapiens (Primates) c. The normal and abnormal development of the skull and its related struc- tures. Homo sapiens (Primates) 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 scro[a (Artiodactyla) h. Study of a collection of abnormal embryos of an age corresponding to the third month of human development with the aim of throwing light on the development of various human abnormalities. Sus scro[a (Artio^ dactyla) c. Study of the development of truncus arteriosus persistens communis in abnormal hearts. Sus scrofa (Artiodactyla) SHAPIRO, H. B.S.. A.M., Ph.D., Prof. — Nat. Inst, of Health, BETHES- DA, Md, U.S.A. (no data received over some years) SHAVER. J. R. A.B.. Ph.D. — Dept of Zool., Univ. of Missouri, COLUM^ BIA, Missouri, U.S.A. a. Initial development (Artificial parthenogenesis). Rana pipiens (Anura) b. Physiology of fertilization. Rana pipiens (Anura) c. Physiology of cleavage. Rana pipiens (Anura) SHEN, S. C. Ph. D. — Osborn Zool. Lab., Yale Univ., NEW HAVEN 11, Conn., U.S.A. (no data received on Nov. 1^*, 1952) SHEN SHU MING B.Sc. — Lab. for Developm. Physiol., Inst, for Exper. Biol., Acad. Sinica, 865 Chang Ning Rd, SHANGHAI, China, (no data received on Nov. 1^^, 1952) SHULOV, A. Dr — Dept of Zoology, Hebrew Univ., JERUSALEM, Israel, a. Ecological conditions of development of the eggs. Artificially induced interruption of development (eggs) (The changes in yearly development cycles under influence of dryness or|and humidity). Tmethis cisti, Prio- nosthenus sp., Anacridium aegyptium, Pareuprepocnemis syriaca and Pezotettix judaica (Acrididae, Orthoptera) , Latrodectus XIII guttatus Rossi (Theridiidae, Araneida) SIGOT. A. — Inst, de Zool.. Lab., de Biol, gener., Fac. des Sci. de Stras- bourg. 12 Rue de I'Universite, STRASBOURG, France, a. Etude de la sensibihte hereditaire au gaz carbonique. Drosophila mela- nogaster (Diptera) SILeN. L. K. p. Fil. Dr — Zootom. Inst., Univ. of Stockholm, 116 Drott- ninggatan, STOCKHOLM, Sweden, a. Development of free stages including settling and metamorphosis. Phoro- nis hippocrepia, miilleri, pallida, ovalis (Phoronidea) SINCLAIR, J. G. B.S., M.S., Ph.D.. Prof. — Dept of Anat., Med. Branch, Univ. of Texas, GALVESTON, Tex., U.S.A. a. Early embryos, structure, conditions of implantation. Homo (Primates) Sinclair 81 Snc b. Effects of urethane on reproduction and on the young across the pla- centa. Mus musculus (C57 and CBA strains) (Rodentia) c. Anterior cerebral nerve plexus in adult and fetus. Tursiops truncatus, Orytolagus cuniculus, Mus musculus and Homo (Mammalia) SINGER M.' A.M., Ph.D., Prof. — Dept of Zool.. Cornell Univ., ITHACA, N.Y., U.S.A. a. Regeneration. Ameiurus nebulosus (Pisces) SINHA, T. P. B.S., M.S.. M.B.. Prof. — Dept. of Anat., Prince of Wales Med. Coll., PATNA, Behar, India, (no data received over some years) SIPPEL. T. O. A.B. — Osborn Zool. Lab.. Yale Univ., NEW HAVEN 11, Conn., U.S.A. (no data received on Nov. 1^*. 1952) SIRLIN', J. L. Grad.Biol.Sc. — Central de Investig., Minist. de Salud Piibl. de'la Nacion, Bolivar 1128, BUENOS AIRES. Argentina, a. Action of ACTH on development. Bufo arenarum (Anura) h. Induction of lens by normal eyecup. Bu[o arenarum (Anura) c. Mucopolysaccharides in development. Bu[o arenarum (Anura) d. Origin of sympathetic ganglia. Bufo arenarum (Anura) SKREB, N. DrMed. — Inst, de Biol., Fac. de Med., Salata, ZAGREB. Yougoslavie. a. Cytologic et cytochimie des premiers stades du developpement. Rhino- lophus, Miniopterus (Chiroptera) 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, Mammalia) SLOTWInSKI, J. Dr, Prof. — Inst. d'Histol. norm, et d'Embryol. de I'Univ. Poznan, ul. Swiecickiego 6. POZNAN, Pologne. (no data received over some years) SMIT, A. L. M.Sc. — Zool. Inst., Univ. of Stellenbosch, STELLEN- BOSCH, S. Africa, a. Ontogenesis of the vertebral column. Xenopus laevis (Anura) SMITHBERG. M. Ph.D. — Roscoe B. Jackson Mem. Lab., BAR HARBOR, Me, U.S.A. a. Maternal influences upon prenatal development. Mus musculus (Rodentia) b. Factors influencing survivability of transplanted ova. Mus musculus (Rodentia) SMITHBERG, M. A.B. (Biol.) — Dept of Biol., Coll. of Arts and Sci., Univ. of Rochester, ROCHESTER 3, N.Y., U.S.A. a. The origin of the tail, determined by use of vital stains; defect; isolation of primordia; transplantation of primordia of the tail forming area of the neurula stage. Rana pipiens (Anura) SMRECZYnSKI. S. Ph.D. — Zool. Dept of the Jagellonian Univ.. KRA- KOW (Cracow). St Anne 6. Poland, a. Determination of early developmental stages. Agelastica alni (Coleop- tera) (this work is temporarily in abeyance) SNELLEN, H. A. Med. Dr — Anat.-Embryol. Lab. of the Univ., Fac. of Med., Wassenaarseweg, Boerhaavekwartier, LEIDEN, Holland, (no data received on Nov. 1**, 1952) Sno 82 Spr SNOOK T B Sc M.Sc, Ph.D. — Dept of Anat.. School of Med., Univ. of Pittsburgh, PITTSBURGH 13, Pa, U.S.A. a. Studies on the development of the spleen. Homo (Primates) b. The relation of reticulum to epidermis in the developing hoof. Sus (Artiodactyla) c. Correlation of nerve endings in muscle with observed foetal activity. Homo (Primates) SNYDER F. F, M.D., A.M., Prof. — Dept of Obstetrics and Anat., Har- vard'Med. School. 25 Shattuck Str., BOSTON 15. Mass., U.S.A. a. Action of analgesic agents on fetal respiration — Meperidine and levo- isomethadone. Lepus cuniculns L. (Rodentia) b. Antidotal action of N-allylnormorphine to depression of fetus by mor- phine, meperidine, levo-isomethadone. Homo sapiens (Primates) SOBELS, F. H. DrSc. — Genet. Inst, der Rijks Univ., Stationsstraat 9, UTRECHT, Holland, a. Genetics and developmental physiology of a polygenically determined mutant type ,, Asymmetric" with special reference to its abnormal abdo- men character. Drosophila melanogaster Meigen (Insecta) h. Developmental genetics of mutants. Drosophila melanogaster Meigen (Insecta) (in collaboration with N. O. van DORP van VLIET, Mrs J. FLORSCHilTZ-de WAARD and W. van UTRECHT) SOMMELET, J. — Lab. d'Anat., Inst. Anat., Fac. de Med., 31 Rue Lion- nois. NANCY (Meurthe & Moselle), France. a. Organogenese de I'articulation du poignet. Homo (Primates) (en colla- boration avec A. A. BEAU et J. CAYOTTE) SPAR I. L. B.S. — Dept of Biol., Coll. of Arts and Sci., Univ. of Rochester, ROCHESTER 3, N.Y., U.S.A. a. Antigenic differences among early embryonic stages. Rana pipiens pipiens (Anura) SPIEGEL M. B.S. — Dept of Biol., Coll. of Arts and Sci., Univ. of Roches- ter, ROCHESTER 3, N.Y., U.S.A. a. Enzymatic digestion of the vitelline membrane and jelly. Rana pipiens pipiens (Anura) b. The action of specific antisera on cell affinity. Rana pipiens pipiens (Anura), (Porifera) SPIRITO, A. Dott., Prof. — 1st. di Biol, gen., Fac. di Med., S. Pietro, PERUGIA, Itaha. a. Origine e natura dei tumori. Bufo (Anura) SPOFFORD W. R. Ph.D.. Prof. — Dept of Anat., School of Med., State Univ. of New York, 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.. 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 blas- toderms). Gallus domesticus (Aves) b. Survey of dehydrogenase enzymes in early embryos: 1. Locahzation of enzyme activity. 2. Structural integrity and enzyme activity. Gallus domesticus (Aves) St 83 Stephen STARCK, D. F.I.I.E., Dr med., o.Prof. — Dr Scnckenberg. Anat. Inst., Med. Fak. der Univ., Ludwig Rehnstr. 14, FRANKFURTyMain Siid, Deutschland. a. Chondrocranium and osteocranium. Scotophiliis temmincki and Myotis mijotis ( Microchiroptera) b. Chondrocranium and osteocranium, especially orbitotemporal region of skull. Struthio, Sula, Diomedea and Spheniscus (Aves) STARK, O. J. Dr rer.nat. — Zool. Inst, der Univ., Katharinenstr. 20, FREI- BURG i.Brsg., Deutschland. a. Entstehung und Determination der Geschlechtszellen und Gonaden. Triton (Urodela) (gemeinsam mit O. MANGOLD) STEFANELLI, A. F.I. I.E., Dr, Prof. — 1st. di Zool., Univ. di Stato, Viale S. Bartolomeo 1, CAGLIARI, Sardegna, ItaHa. (no data received over some years) STEINER, H. Ph.D.. Prof. — Zool.-vergl. Anat. Inst., Naturw. Fak., Univ. Zurich, Kiinstlergasse 16, ZURICH 6, Schweiz. (no data received on Nov. 1**, 1952) STEINERT, M. Lie. Sc. Zool. — Lab. de Morphol. anim., Fac. des Sci., Univ. librc de Bruxelles, 1850 Chaussee de Wavre, BRUXELLES- Auderghem, Belgique. a. Studies on nucleic acid synthesis during morphogenesis. (Amphibia) b. Etude de purines hbres dans I'embryon. Rana, Pleurodeles, Ambystoma STEINITZ. H. Ph.D. — Dept of Zool., Hebrew Univ. JERUSALEM, Israel. — Osborn Zool. Lab., Yale Univ., NEW HAVEN 11, Conn. U.S.A. a. Regeneration of retina from transplanted retinal pigment epithelium. Triturus v. viridescens (Urodela) (in collaboration with L. S. STONE, New Haven) b. The role of retinal pigment cells in various types of retinal injuries. Tritu- rus V. viridescens (Urodela) (in collaboration with L. S. STONE) c. Role of endocrines in regeneration of the retina and lens. Triturus v. viri- descens (Urodela) (in collaboration with L. S. STONE) STEPHAN, Fr. Dr es Sc. — Lab. de Zool. de la Fac. des Sci et Lab. d'Embryol. et Teratol. exper. du C.N.R.S., Inst, de Zool. et de Biol. gen.. 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 Sc. — Lab. de Zool. de la Fac. des Sci. et Lab. d'Embryol. et Teratol. exper. du C.N.R.S.. Inst de Zool. et de Biol, gen., 12 Rue de I'Universite. STRASBOURG. France. a. Migration des neoblastes dans la regeneration. Facteurs qui declen- chent cette migration. Etude de I'arret de la migration. Euplanaria lugu- bris (Tricladidea, Turbellaria) b. Migration des neoblastes dans la regeneration. Tubifex tubifex (Tubi- ficidae. Oligochaeta) et Lumbriculus variegatus (Lumbriculidae, Oligo- chaeta) STEPHENSON. N. G. M.Sc. — AUCKLAND Univ. Coll., New Zealand, (no data received on Nov. 1'*, 1952) Stev 84 Struch STEVENS, L. C. Grad. stud. — Dept of Biol.. Coll. of Arts and Sci.. Univ. of Rochester. ROCHESTER 3, N.Y., U.S.A. (no data received on Nov. 1«', 1952) STICH, H. Drrer. nat. — Max Planck-Inst.. WILHELMSHAVEN, Deutschland. a. Das Vorkommen von Ribonucleinsaure in Kernsaft und Spindel sich teilender Kerne. Cyclops strenuus (Entomostraka) h. Das Vorkommen von Kohlehydraten im Ruhekern und wahrend der Mitose. Cyclops strenuus (Entomostraka) c. Das Vorkommen und die Bedeutung von Polysacchariden wahrend der Furchung. Sabellaria (Polychaeta), (Pisces) und Triton (Urodela) d. Der Einfluss von Colchicin auf den Ribonucleinsaure- und Kohlenhy- dratcyklus wahrend der Mciose und Mitose. Cyclops strenuus (Ento- mostraka) und Sabellaria spinulosa (Polychaeta) e. Der Einfluss von Trypaflavin und Streptomycin auf den Ribonuclein- saure- und Kohlenhydratcyklus wahrend der Mitose. Cyclops strenuus (Entomostraka) und Sabellaria (Polychaeta) STOCKARD, A. H. Ph.D. — Dept of Zool.. Univ. of Michigan, ANN ARBOR, Mich., U.S.A. (no data received on Nov. 1^', 1952) STONE, L. S. F.I.I.E., Ph.D., Prof. — Anat. Dept, School of Med., Yale Univ. — Osborn Zool. Lab., Yale Univ., NEW HAVEN 11, Conn., U.S.A. a. Regeneration of retina from pigment cells. (Amphibia) b. Development of vision in transplanted eyes. Ambystoma punctatum and Triturus v. viridescens (Urodela) c. Factors controlling the inhibition and release of lens regeneration. (Urodela) d. Regeneration of the lens. Salamandra s. salamandra (Urodela) (in colla- boration with R. W. REYER, Pittsburgh) e. Regeneration of retina from transplanted retinal pigment epithelium. Triturus v. viridescens (Urodela) (in collaboration with H. STEINITZ, Jerusalem) f. The role of retinal pigment cells in various types of retinal injuries. Tri^ turus V. viridescens (Urodela) (in collaboration with H. STEINITZ, Jerusalem) g. Role of endocrines in regeneration of the retina and lens. Triturus v. viridescens (Urodela) (in collaboration with H. STEINITZ, Jerusalem) h. Physiological projection of the retinal quadrants on the optic tectum. Triturus v. viridescens (Urodela) (in collaboration with E. S. CRELIN) j. Excision and rotation of the developing optic tectum and subsequent visual behavior. Ambystoma punctatum (Urodela) (in collaboration with E. S. CRELIN) STRAUSS, F. M.D. — Anat. Inst., Biihlstr. 26, BERN, Schweiz. a. The oviduct during the passage of the egg. (Mammalia) b. Comparative implantation. (Mammalia) c. Comparative development of the brain. Cricetus auratus (Rodentia) (in collaboration with K. FEREMUTSCH, Waldau-Bern) STRUCHLY. Z. Dr — ZaWad Zool. Ogolnej, Inst. Zool. Uniw. we Wroclawiu, ul. Sienkiewicza 21, WROCLAW. Polska (Poland), (no data received on Nov. 1^*, 1952) Strud 85 Takata STRUDEL. G. Lie. es Sc. — Lab. de Zool. de la Fac. des Sci. et Lab. d'Embryol. et Teratol. exper. du C.N.R.S., Inst, de Zool. et de Biol, gen., 12 Rue de I'Universite. STRASBOURG, France, a. Les correlations nerveuses chez I'embryon, etudiees par les methodes d'excision chirurgicale. Origine des ganglions rachidiens et du systeme sympathique. Gallus gallus (Aves) STUART E. G. Dr — Dept of Anat.. School of Med., Univ. of Penn- sylvania. PHILADELPHIA 4, Pa. U.S.A. a. Factors influencing regeneration of nerve fibers in the central nervous system of adult animals. Felis domestica (Carnivora) and (Anthro- poidea) (in collaboration with J. L. LITTRELL and W. F. WINDLE) b. Growth and regeneration of the severed spinal cord in embryos. Gallus domesticus (Aves) (in collaboration with J. L. LITTRELL and W. F. WINDLE) SU Tchou Dr es Sc. — Lab. of Developm. Physiol., Inst, of Exper. Biol. Acad. Sinica, 865 Chang Ning Rd. SHANGHAI, China, (no data received on Nov. 1^', 1952) SUGIYAMA. M. Dr Sci. — The Sugashima Marine Biol. Stat., Nagoya Univ.. SUGASHIMA-MURA, Shima-gun, Mie-ken, Japan, a. Physiological studies on fertihzation and artificial parthenogenesis. Strongylocentrotus pulcherrimus, Pseudocenttotus depressus (Echi- noidea) (in collaboration with M. ISHIKAWA) SWEDMARK, B. G. Fil.mag. — Inst, for Zoophysiol., Fac. of Mat.- Nat.Sci.. Villavagen 9. UPPSALA, Sweden. a. Sulphate metaboHsm in development. (Echinoidea) SYREN, J. Lie. es Sc. — Lab. de Zool. de la Fac. des Sci. et Lab. d'Embryol. et Teratol. exper. du C.N.R.S., Inst, de Zool. et de Biol. gen.. 12 Rue de I'Universite, STRASBOURG, France, a. Recherches sur le developpement et la regulation de I'oeil en culture i n vitro. Gallus gallus (Aves) SZARSKI, K. W. Ph.D. — Zaklad Anat. Porownawczej. Inst. Zool. Uniw.. ul. Sienkiewicza 21, WROCLAW, Poland, a. Development of the kidneys. (Teleostei and Anura) h. Development of genital tracts and accessory glands. (Chiroptera) SZE L.C. Ph.D. — Dept of Zool., Fac. of pure Sci., Columbia Univ., Broadway and 116 Str., NEW YORK 27. N.Y., U.S.A. a. Biochemical gradients. Rana pipiens (Anura) h. D N A change in development. Rana pipiens (Anura) TAHARA, Y. — Lab. of Morphol., Osaka Liberal Arts Univ., IKEDA, Osaka Pref., Japan, a. Study of development. Cipago paludina japonica (Gastropada) h. Tail formation. Rana nigromaculata and Rana japonica (Anura) c. Formation of digestive tract. Rana, Triturus, Hynobius (Amphibia) TAKAMOTO. K. M.Sc. — Lab. Exp. Embryol., Inst, of Polytechnics, Osaka City Univ., Minami-Ogimati, Kita-ku, OSAKA, Japan. a. Histochemical study of gonadogenesis. Triturus pyrrhogaster (Boie) and Hynobius nebulosus (Schlegel) (Urodela) h. Studies on the effect of chemical reagents on the morphological develop- ment of the early embryo. Triturus pyrrhogaster (Boie) (Urodela) TAKATA, K. M.A. (Rigakushi) — Biol. Inst., Fac. of Sci., Nagoya Univ.. Chigusa-Ku, NAGOYA. Japan. Takata 86 Toi a. Behaviour of some phosphorous compounds in developing embryos. Triturus pyrrhogaster (Urodela) (in collaboration with T. YAM ADA) b. Ribonuclease activity in different presumptive regions of developing embryos. Triturus pyrrhogaster (Urodela) TAKAYA, H. Ph.D.. Asst Prof. — Lab. of Embryol. and Exp. Morphol., Zool. Inst., Dcpt of Sci., Kyoto Univ., KYOTO, Japan. a. Production of situs inversus viscerum. Triturus, Hynobius, Rana, Bufo (Amphibia) b. Sex-reversal. Triturus, Rana (Amphibia) c. Regional specificity of the inductive faculty of the organizer. Triturus, Hynobius (Urodela) TARDENT, P. — Abt. fiir Zoophysiologie, Zool. Inst, der Univ., Sahlistr. 8, BERN. Schweiz. a. Regeneration (Bedeutung der I-Zellen). (Hydrozoa, Coelenterata) (in Zusammenarbeit mit F. E. LEHMANN) TESTA, Italo Dr — Heihgenberg-Inst., (17b) HEILIGENBERG, Kreis Ueberlingen/Bodensee, Dcutschland. a. Regulationsvorgange an experimentell hergestellten eineiigen Zwillingen. Triton (Urodela) (gemeinsam mit O. MANGOLD) TEYSSEYRE. Miss J. Dr en Med. — Lab. d'Embryol., Fac. de Med.. 15 Rue de I'Ecole de Med., PARIS V^, France, a. Repercussions du fonctionnement thyroidien maternel sur le developpe- ment du systeme nerveux de I'embryon. THEILER, K. Dr Med. — Anat. Inst, der Univ., Gloriastr. 19. ZURICH, Schweiz. a. Ueber die Entstehung von Wirbelkorperfehlbildungen. Homo (Primates) b. Ueber die Entwicklung von Missbildungen der Wirbelsaule. Homo, Gallus und Mus (Vertebrata) THERMES, G. Dr — 1st. di Zool.. Univ. di Stato, Viale S. Bartolomeo 1, CAGLIARI, Sardegna, Itaha. (no data received over some years) THOMAS, R. Lie. Sc. Chim. — Lab. de Morphol. anim., Fac. des Sci., Univ. Libre de Bruxelles, 1850 Chaussee de Wavre, BRUXELLES- Auderghem, Belgique. (no data received on Nov. 1^*, 1952) THOMASON. Miss D. B.A. (Hons.) — The Royal Free Hospital School of Med.. 8 Hunter St.. LONDON W.C. 1. England (U.K.) a. Absorption and localisation of phosphate in embryos during development, using P 32. (Amphibia) THOMSON FLYNN. T. F.I.I.E., Dr., Prof. — Fac. of Sci., Queens Univ.. BELFAST, Ulster, Eire (U.K.) (no data received) THORSSELL, Miss G. — Inst, for Zoophysiol, Fac. of Mat.-Nat.Sci., Villa- vagen 9, UPPSALA, Sweden, a. The primary sex rate. (Mammalia) THURMOND, W. A.B., M.A. — Dept of Zool., Univ. of Cahfornia, BER- KELEY 4, Cal., U.S.A. a. The determination of the first appearance of intermedin in ontogeny. Hyla regilla (Anura) TOIVONEN, S. I. F.I.I.E., Ph.D., Prof. — Zool. Lab., Univ. of Helsinki, Dept of Physiol.. P. Rautatiekatu 13. HELSINKI. Finland, a. The specific action of heterogenous inductors. Triton (Urodela) Toivonen d)7 Tram b. Analysis of the regulative potencies of the invaginating archenteron roof and of the induced neural plate along the dorsoventral and craniocaudal axes by heteroplastic transplantation of parts of the dorsal blastoporal lip. Triturus alpestris, taeniatus and cristatus (Urodela) (in collabora- tion with P. D. NIEUWKOOP) c. Thyroid gland and adenohypophysis in delayed metamorphosis. Xenopus laevis (Anura) d. The development of mouth- and pharyngeal cavity. Xenopus laevis (Anura) (Normal Table) e. Induction of bone cells by chemical agents in the adult animal. Lepus cuniculus (Rodentia) TONDURY, G. F.I. I.E.. Prof. — Anat. Inst, der Univ., Gloriastr. 19, ZURICH, Schweiz. a. Systematische Untersuchungen typischer menschlicher Missbildungen unter Bezugnahme auf die Ergebnisse entwicklungsphysiologischer For- schung. Gegenwartig werden Kopfmissbildungen und sireniforme Miss- bildungen analysiert. Homo (Primates) b. Untersuchungen iiber die Entwicklung des Gesichts und ihre Beziehun- gen zur Entstehung der Hasenscharte und anderer Spaltbildungen. Homo c. Untersuchungen zur Frage der Gonadenentwicklung und der Potenzen des Ovarepithels beim Erwachsenen. Homo (Primates) d. Embryologische Untersuchungen zur Frage der Embryopatia rubeolosa. (Mammalia) e. Untersuchungen zum Wirkungsmechanismus der Sexualhormone auf Wachstum und Differenzierung. (Amphibia) f. Experimentelle Untersuchungen zum Induktionsproblem. (Amphibia) g. Experimentelle Untersuchungen zur Wirkung der Chorda dorsalis. Gal- lus (Aues) h. Untersuchungen iiber die Wirkung von Viren auf die Embryonalent- wicklung. TOSI, Miss L. Dott. Sci. Biol. — 1st. di Zool. e Anat. Comp., Univ. di Milano, Via Celoria 10, MILANO, Italia. — 1st. di Anat. Comp., Univ. di Palermo, PALERMO, Italia. a. Physiology of fertilization. (Echinodermata and Amphibia) b. Analysis of the changes in the protein systems of the egg as a result of fertilization. (Echinodermata) (in cooperation with A. MONROY) TOWNES, Ph. L. Grad.stud. — Dept of Biol., Coll. of Arts and Sci., Univ., of Rochester, ROCHESTER 3, N.Y., U.S.A. a. Selective cellular adhesion in embryonic germ layers. (Urodela and Anura) TRACY, H. C. Ph.D.. Prof. — Dept of Anat.. Med. School, Univ. of Kansas, LAWRENCE. Kan., U.S.A. a. The development of all systems in relationship to behavior. Opsanus tau (Pisces) (in collaboration with J. WINBLAD and Th. BATTY) b. Development of the nervous system in relation to behaviour. Opsanus tau (Pisces) c. Physiological stages in development. Opsanus tau (Pisces) TRAMPUSCH, H. A. L. Dr Phil. — Anat.-Embryol. Inst.. Gemeentelijke Univ. van Amsterdam, Mauritskade 61, AMSTERDAM O., Holland. a. Experiments testing similarity in the processes which take place during embryological development and regeneration. (Coelenterata, Vermes) Trampusch 88 Tyl b. Experiments searching for the origin and the way of developing of regeneration-blastema. (Urodela and Anura) c. Experiments analyzing lens regeneration and the difference between regenerating and non-regenerating species. (Anura) d. Experiments aimed to circumstances under which regeneration will be stimulated or inhibited. (Urodela and Anura) TRIBE. Miss M. D.Sc. — King's Coll., Strand, LONDON W.C. 2. Eng- land (U.K.) a. Fate of the dermatome. Gallus domesticus (Aves) b. Early development of the gill pouches. Rana temporaria (Anura) TRINKAUS, J. P. M.A., Ph.D. — Osborn Zool. Lab.. Yale Univ.. NEW HAVEN 11. Conn., U.S.A. (no data received on Nov. 1^*, 1952) TROLLOPE, Miss E. M. B.Sc. Hons. (Rand.) — Dept of Zool, Univ. of the Witwatersrand, Milner Park. JOHANNESBURG. South Africa, a. The effects of anti-organ sera on developing embryos. Gallus domesticus (Aves) TRUSLOVE, Miss CM. B.Sc. Ph.D. — Dept of Genetics. Univ. Coll. London. Gower Str., LONDON W.C. 1, England (U.K.) a. Developmental genetics of skeletal mutants. Mus musculus (Rodentia) TUFT. P. H. M.A.. Ph.D. (Cantab.) — Dept of Zool., Univ. of Edinburgh, West Mains Rd. EDINBURGH 9, Scotland (U.K.) a. Respiratory metabolism of developing eggs. Rhodnius prolixus, Locus- tana pardalina and Calliphora (Insecta) b. Respiratory metabolism. Lucilia sericata (Diptera) c. Respiratory metabolism. Xenopus laevis (Anura) TUNG. T. C. F.I.I.E., Dr, Prof. — Dept of Zool., Univ. of Shantung, TSINGTAO, China, (no data received) TWEEDELL, K. S. — Dept of Zool., Univ. of IlHnois, URBANA, 111., U.S.A. a. Specificity and differential growth of the Lucke carcinoma. Rana (dif- ferent spec.) (Anura) h. Differential growth of Lucke carcinoma. Rana pipiens (hybrid sub- spec.) (Anura) TWITTY. V. C. F.I.I.E., Dr. Prof. — Dept of Biol. Sci., Stanford Univ., STANFORD, Cal., U.S.A. a. The differentiation of macrophages into melanophores following their ingestion of pigmentary debris released by degeneration of preexisting melanophores. (Amphibia) (in collaboration with M. C. NIU) b. The migratory behaviour of single neural crest melanoblasts isolated in capillary tubes of extremely small bore. (Amphibia) (in collaboration with M. C. Niu) c. Inductive relationships in small cell populations, studied by isolation of dissociated cells in vitro. (Amphibia) TYLER. A. F.I. I.E., Ph.D., Prof. — Dept of Embryol., Div. of Biol., Cali- fornia Inst, of Technol.. PASADENA 4, Cal., U.S.A. a. Physiology of fertilization. (Echinoidea) h. Physiology of early development. (Echinoidea), (Polychaeta) c. Life-span, motility and metabolism of spermatozoa. (Echinodermata, Annelida, Mollusca, Aves and Mammalia) Tym 89 Vak TYMOSZCZUKOWNA, Miss A. M.Sc. — Zaklad Anat. Porownaw- czej. Inst. Zool. Uniw., ul. Sienkiewicza 21. WROCLAW. Poland, a Development of sesamoid bones in the carpus. (Rodentia. Insectivora) UBISCH, L. V. F.I. I.E., Drjur. et phil.. Prof. (Emer.) — PARADIS. Norge. a. Untersuchungen iiber Pleuronectiden. III. (Plcuronectidae, Teleostei) h. Die Bedeutung von Metamorphose, Generationswechsel und Polymor- phismus fiir die Abstammungslehrc. UCHIDA T. Rigakushi (M.S.), Rigakuhakushi (Dr). Prof. — Zool. Inst., Fac. of Sci., Hokkaido Univ., North 8, West 5, SAPPORO, Japan. a. On the development of oviform cells in the testis. Upogebia major (Decapoda reptantia, Crustacea) b. On the development of oviform cells in the testis. Triturus pyrrhogaster (Urodela) c. On the oviform cells found in degenerated testes, parasitized by a dipte- rous parasite. Oxya yezoensis (Saltatoria. Orthoptera) ULRICH, H. Dr Phil. — Zool. Inst, der Univ. Gottingen, Mathem.-Naturv/. Fak'.. Nikolausbergerweg 75. GoTTINGEN, Deutschland. a. Strahlenwirkung in der Embryologie. Drosophila melanogaster (Diptera) UPTON, Miss B. C. B.Sc. (Lond.) — Dept of Zool., Queen Mary Coll., Univ. of London, Mile End Rd., LONDON E. I, England. a. Development of giant fibre system and behaviour pattern. Scoloplos, Arenicola, Clymenella (Polychaeta) URBANI, E. Lib. Doc. Anat. Comp., Biol, e Genet. — 1st. di Anat. Comp. dell'Univ., Fac. di Sci., Via Borelh 50, ROMA, Itaha; at present: Lab. de Morphol. anim., Univ. libre de Bruxelles, 1850 Chaussee de Wavre, BRUXELLES-Auderghem, Belgique. a. Ricerche sulla respirazione embrionale. (Teleostei) h. Azione degli antimitotici sul metabolismo respiratorio. (Amphibia) c. Ricerche sulla determinazioni embrionali precoci. (Ascidiae) d. Ricerche sui determinanti germinali. (Insecta) e. Ricerche sull'acido ribonucleico delle fasce vitellogene e dei nuclei vitel- lini. (Echinodermata, Atachnoidea, Myriopoda e Mammalia) f. Ricerche sulla costituzione delle formazioni ergastroplasmatiche. g. Ricerche citochimiche. Amoeba proteus (Amoebina) URBANI— MISTRUZZI, Mrs L. Dott. — 1st. di Anat. comp. dell'Univ.. Fac. di Sci.. Via Borelh 50, ROMA, ItaHa. (no data received on Nov. 1**, 1952) UTRECHT, W. van — Zool. Lab. der Rijks Univ., Janskerkhof 3, UTRECHT, Holland, a. Investigation into the lethality of combinations of the genes D and pr with different ey alleles. Drosophila melanogaster Meigen (Insecta) (in collaboration with F. H. SOBELS) VAHS W. — Zool. Inst, der Univ. Koln. Kerpenerstr. 13. KoLN- LINDENTHAL, Deutschland. a. Die Beeinflussbarkeit der Leistungsspezifitat abnormer Induktoren in der Entwicklung. (Amphibia) VAKAET, L. C. M.D. — Lab. of Anat., Fac. of Med.. Univ. of Gent, Bylokekaai 1. GENT, Belgium. (no data received on Nov. 1^', 1952) Vand 90 Vri VANDEBROEK, G. DrSc Prof. — Lab. d'Embryol., Inst, de Zool., Univ. de Louvain. 71 Rue de Namur, LOUVAIN, Belgique. (no data received over some years) VANNINI, E. Dr, Prof. — 1st. di Zool. e Anat. comp., Via Universita 4. MODENA, Italia, a. Cycle of the nucleic acids and nucleolar changes during oogenesis. (Annelida, Echinodermata, Pisces, Amphibia) h. Development of the gonads and their embryological relations with the cortico-adrenal blastema. (Amphibia, .i4i;es. Mammalia) c. Experimental analysis of the causal development of the gonads. (Amphibia) d. Experimental regeneration and genesis of the germ-cells. (Polychaeta) e. Development of the gonads. Xenopus laevis (Anura) (Normal Table) VASSEUR E. J E. Ph.D — Wenner-Grens Inst, for experimental Biology, Norrtullsgatan 16. STOCKHOLM Va., Sweden, a. Action of dissolved jelly coat substance (fertilizin) on the spermatozoa. Studies on the chemical composition of the jelly substance and the species specifity of its chemical composition. (Echinoidea) VERHAGEN. Th. G. M. — Zool. Lab. der Rijks Univ.. Janskerkhof 3, UTRECHT. Holland, a. Cytology of the saccus vasculosus. Scyllium canicula (Selachii) VERMAAK. D. B.Sc. — Zool. Inst., Univ. of Stellenbosch. STELLEN- BOSCH. S. Africa, a. Ontogenesis of commissural connexions of the vena pudenda externa and V. p. interna in an advanced embryo. Homo sapiens (Primates) VIGLIANI, F. Dr — Inst, of human Anat., Corso Massimo d'AzegHo 52. TORINO, Italy, a. Late development and growth of bones, joints and muscles in mechani- cally inert and denervated limbs. Canis familiaris (Carnivora) VILLAFRANCA. G. W. de B.S. — Osborn Zool. Lab., Yale Univ.. NEW HAVEN 11, Conn., U.S.A. — Smith Coll.. Dept of Zool., NORTHAMPTON, Mass., U.S.A. a. Studies of various enzyme fractions in developing muscle in relation to the development of contractibility. Mus norvegicus albinus (Rodentia) (under direction of E. J. BOELL) 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 Ver- tebres. (Amphibia) VISSCHEDIJK. A. H. J. — Zool Lab. der Rijks Univ.. Janskerkhof 3. UTRECHT, Holland, a. Influence of temperature shock. Limnaea stagnalis (Gastropoda) VITAGLIANO. G. Dr Sc. — 1st. di Genet. dell'Univ. di Napoh. Fac. di Sci., Via Mezzocannone 8, NAPOLI, Italia. (no data received over some years) VOGT, Miss M. M.D. — Hirnforschungs-Institut, NEUSTADT, Schwarz- wald, Germany (present address: Dept of Biol., California Inst, of Technol.. PASADENA 4, Cahf., U.S.A.) (no embryological work planned for 1952) VRIES, Miss L. G. de — Zool. Lab. der Rijks Univ., Janskerkhof 3. UTRECHT, Holland. Vries 91 Web a. Analysis of lithium action. Limnaea stagnalis (Gastropoda) (in colla- boration with D. BOSSCHAERT. Miss C. H. M. BRAAT. Miss S. C. A. HAIJE, Miss A. H. LYESEN. J. H. W. NICOLAI, Miss A. J. PARIS Chr. P. RAVEN and F. van RIJCKEVORSEL) WADDINGTON, C. H. F.I.I.E., F.R.S., M.A.. Sc.D.. Prof. — Inst, of Animal Genet., Univ. Dept of Genet., King's Buildings, West Mains Rd, EDINBURGH 9, Scotland (U.K.) a. Cinematographic study of morphogenetic movements. (Amphibia and Aves) h. Transplantation of cell constituents. Triton alpestris (Urodela) c. Developmental effects of some genes. Drosophila melanog aster (Insecta) d. Study of abnormal embryos induced by injecting trypan blue into preg- nant animals. Mus musculus (Rodentia) (in collaboration with T. C. CARTER) e. Mechanism of cleavage divisions, and micro-structure of coat and vitel- line membrane. Various species (Amphibia) (in collaboration with G. G. SELMAN and H. YATES) WAECHTER, Miss H. Dr rer.nat. — Heiligenberg-Inst., (17b) HEILI- GENBERG, Kreis Ueberhngen/Bodensee, Deutschland. a. Determinationsvorgange in dcr Gastrula und Neurula. Triton (Uro- dela) (gemeinsam mit O. MANGOLD) b. Verhalten embryonaler Zellen im erwachsenen Wirt. Triton (Urodela) c. Einfluss ungiinstiger ausserer Bedingungen auf Entwicklung. Triton (Urodela) (gemeinsam mit O. MANGOLD) WAELSCH, Mrs S. GLUECKSOHN Ph.D. — Dept of Zool., Fac. of pure Sci., Columbia Univ.. Broadway and 116 Str.. NEW YORK 27, N.Y.. U.S.A. a. Developmental genetics. Mus musculus L. (Rodentia) b. Developmental physiology. Mus musculus L. (Rodentia) WALLACE D. R. J. B.Sc. — Dept of Zool., Univ. of Edinburgh. West Mains Rd. EDINBURGH 9, Scotland (U.K.) a. Growth and differentiation of hypopi. (Acarina, Arachnoidea) WALLMANN, Miss S. B.S. — Dept of Zool., Univ. of Chicago, CHI- CAGO 37, 111., U.S.A. (no data received on Nov. 1^', 1952) WANG YU LAN, Miss B.Sc. — Lab. of Developm. Physiol.. Inst, of Exper. Biol., Acad. Sinica, 865 Chang Ning Rd, SHANGHAI. China. (no data received on Nov. l'^', 1952) WARD— ORSINI. Mrs M. C. Ph.D.. B.A., U.S. Pubhc Health Fellow, Nat. Cancer Inst. — Dept of Anat., Univ. of Wisconsin. MADISON, Wis., U.S.A. (no data received on Nov. 1^', 1952) WASHINGTON, Mrs D. M.S. — Dept of Zool.. Univ. of Chicago, CHICAGO 37. 111., U.S.A. (no data received on Nov. 1"', 1952) WATTERSON R. L. Ph.D. — Cresap Biol. Lab., Northwestern Univ.. EVANSTON, 111.. U.S.A. (no data received on Nov. 1^*. 1952) WEBER. A. F.I. I.E.. Prof. (Emer.) — Lab. de Neurohistol.. Inst. d'Anat.. Ecole de Med.. 20 Rue ficole de Medecine, GENfiVE. Suisse. (no data received over some years) Web 92 Wes WEBER, R. Dr Phil.nat. — Abt. fiir Zoophysiologie, Zool. Inst, der Univ., Sahlistr. 8, BERN, Schweiz. a. Regeneration. Xenopus laevis (Anura) b. Teratome, Xenopus laevis (Anura) c. Submikroskopische Struktur von Regenerationsgewebe. Xenopus (Anura) (Larven) WEDIN, B. Dr— Embryol. Dept, Zool. Inst, of the Univ. of Lund, LUND, Suneden. a. Embryology of the coeloms of the head. (Vertebrata) WEGLARSKA. Miss B. B.Sc. — Zool. Dept of the Jagellonian Univ.. KRAKOW (Cracow), St Anne 6, Poland, a. Cleavage and development of the embryonic envelopes. Polydrosus impar (Curculionidae, Coleoptera) WEISS, P.A. F.I. I.E., Ph.D.. M.D.. Prof. — Dept of Zool.. Univ. of Chi- cago, CHICAGO 37, 111., U.S.A. (no data received on Nov. 1^*, 1952) WEISZ, P. B. B.Sc, M.Sc. Ph.D. — Arnold Biol. Lab., Brown Univ., PROVIDENCE 12, R.I.. U.S.A. a. Study of morphogenesis. Stentor and Blepharisma (Ciliata) h. Study of self-reproducing organelles. (Ciliata) WEL, W. H. V. d. Med. Drs — Anat.-Embryol. Lab. of the Univ., Fac. of Med., Wassenaarseweg, Boerhaavekwartier, LEIDEN, Holland, (no data received on Nov. 1^'. 1952) WELLER, E. A.B., M.S. — Dept of Zool., Univ. of CaHfornia, LOS ANGELES 24, Cal., U.S.A. a. Studies of the lipid in the serum of the developing embryo. Gallus domesticus (Aves) (in collaboration with A. M. SCHECHTMAN) WELLS, L. J. Ph.D.. Prof. — Dept of Anat., School of Med., Univ. of Minnesota, MINNEAPOLIS H, Minn., U.S.A. (no data received on Nov. 1=', 1952) WENDT, G. G. DrMed. — Anat. Inst, der Univ., Robert Kochstr. 6, MARBURG/Lahn, Deutschland. a. Ablauf und Bedingungen embryonalen Muskelwachstums. Aenderungen des Gewichts, des Volumens und des Wassergehalts wahrend des Wachstums und der Hypertrophie. Mus musculus (Stamm Strong A.) (Rodentia) WENGER. B. S. B.S., M.S., Ph.D. — Dept of Anat., Univ. of Kansas, Med. School, LAWRENCE, Kan., U.S.A. a . Microchemical study of the developing central nervous system: cholin- esterase, acid and alkaline phosphatase. Gallus domesticus (Aves) h. Microchemical study of the developing salivary gland. Drosophila ro" busta (Insecta) (in collaboration with S. W. LESHER) (data of 1951) WENGER, Mrs E. L. Ph.D. — Dept of Anat. Med. School. Univ. of Kansas, LAWRENCE, Kan., U.S.A. a. Cytochemical and microchemical study of the developing nervous system and its relationship to developing behaviour patterns. Ambystoma macu- latum (Urodela) (in collaboration with P. G. ROOFE) WESTHUIZEN, C. M. v. d. M.Sc. — Zool. Inst., Univ. of Stellenbosch. STELLENBOSCH, S. Africa. a. Ontogenesis of the skull. Heleophtyne purcelli (Anura) i Wet 93 Willier WETMORE, R. H. Ph.D.. D.Sc. Prof. — Biol. Lab's, Harvard Univ.. Divinity Ave. CAMBRIDGE 38, Mass., U.S.A. (no data received over some years) WEY— SCHUE, Mrs M. Lie. es Sc. — Lab. de Zool. de la Fac. des Sci. et Lab. d'Embryol. et Teratol. exp. du C.N.R.S., Inst, de Zool. et de Biol, gen., 12 Rue de I'Universite, STRASBOURG, France. a. Problemes relatifs a I'origine des cellules de regeneration. Triturus (Urodela) b. Probleme de la reduction de la taille et du nombre de doigts du membre posterieur de I'embryon, sous I'influence des rayons X. Gallus domes- ticus (Aves) WHITELEY, A. H. Ph.D., Prof. — Friday Harbor Labs, FRIDAY HAR- BOR. Wash., U.S.A. (no data received over some years) WICKLUND, Miss E. W. Ph. lie. — Wenner-Grens Inst, for experimental Biology, Norrtullsgatan 16, STOCKHOLM Va., Sweden, a. On fertilizability of the egg under different conditions acting on sperm and eggs. Psammechinus miliaris, Strongylocentrotus droebachiensis and Arbacia lixula (Echinoidea) WIERDA, J. L. B.S., M.S., Ph.D., Asst Prof. — Dept of Anat., School of Med., Univ. of Pennsylvania, PHILADELPHIA 4, Pa, U.S.A. (no data received over some years) WILENS, Miss S. A.B. — Osborn Zool. Lab., Yale Univ., NEW HAVEN 11, Conn., U.S.A. (no data received on Nov. 1^', 1952) WILLIAMS, R G. A.B. M.A., M.D., Prof. — Dept of Anat., School of Med., Univ. of Pennsylvania, PHILADELPHIA 4, U.S.A. a. Studies on growth of various implanted tissues with the rabbit's ear chamber technique. (Mammalia) h. Development of bone marrow in rabbit's ear tissue chambers. (Mamma- lia) c. Studies on the effect of feeding and topical application of carcinogen on cells implanted in transparent chambers in rabbit's ears. (Mammalia) WILLIAMS, S. C. B.S., Ph.D., Assoc. ProL — Dept of Anat., School of Med., Univ. of Pennsylvania, PHILADELPHIA 4, Pa, U.S.A. a. Tissue culture of young isolated neuroblasts from special areas of brain, esp. cerebellum, medulla. Gallus domesticus (Aves) b. Early development of teeth. Homo (Primates) WILLIAUME, R. — Lab. de Biol. Gen., Fac. des Sci. de Bordeaux, 40 Rue Lamartine, TALENCE (Gironde), France, a. Developpement du systeme renal. Xenopus laevis (Anura) (Normal Table) (en collaboration avec R. CAMBAR) WILLIER, B. H. F.I. I.E.. B.S.. Ph.D., Sc D., Prof. — Dept of Biol.. The Johns Hopkins Univ., Charles and 34th Strs, BALTIMORE 18. Md. U.S.A. a. The mechanism of interaction of melanoblasts of know genotype with feather papilla in the production of feather pigmentation pattern, Gallus domesticus (various varieties) (Aves) b. Factors regulating migration of melanoblasts and their growth (multi- plication) and differentiation (synthesis of specific melanin granules). Gallus domesticus (various varieties) (Aves) Willier 94 Witt c. The role that sex and other hormones play in modifying the phenotypic expression of melanoblasts in color pattern formation. Gallus domesticus (various varieties) (Aves) 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) WINBLAD. J. A.B. — Dept of Anat., Univ. of Kansas, Med. School, LAWRENCE. Kan., U.S.A. a. Development of all systems in relation to behavior. Opsanus tau (Pisces) (in collaboration with H. C. TRACY and TH. BATTY) b. Pharmacodynamics of development. Opsanus tau (Pisces) WINDLE. W. F. B.S., M.S.. Ph.D.. Sc.D., Prof. — Baxter Laboratories, MORTON GROVE, 111., U.S.A. •^ — (as Visiting Research Professor) Dept of Anat., Univ. of Pennsyl- vania, School of Med., PHILADELPHIA 4, Pa, U.S.A. a. Factors influencing regeneration of nerve fibers in the central nervous system of adult animals. Felis domestica (Carnivora) and (Anthto- poidea) (in collaboration with J. L. LITTRELL and E. G. STUART) b. Growth and regeneration of the severed spinal cord in embryos. Gallus domesticus (Aves) (in collaboration with J. L. LITTRELL and E. G. STUART) WINGSTRAND, K. G. Fil. he. — Embryol. Dept, Zool. Inst., Univ. of Lund, LUND, Sweden. (no data received on Nov. !«', 1952) WINOWSKA, Mrs J. M.Sc. — Zaktad Anat. Porownawczej, Inst. Zool. Uniw., ul. Sienkiewicza 21, WROCLAW. Poland, a. Development of the air-bladder. (Euphysoclisti, Teleostei) WIRTH, Miss P. B.S. — Dept of Biol. Sci.. Univ. of Pittsburgh, PITTS- BURGH 13, Pa, U.S.A. (no data received over some years) WISLOCKI, G. B. F.I.I. E., M.D., A.M., Sc.D., Prof. — Dept of Anat., Harvard Medical School, 25 Shattuck Str., BOSTON 15. Mass.. U.S.A. (no embryological work in progress) WITSCHI. E. F.i.I.E., Ph.D.. Prof. — Dept of Zool., State Univ. of Iowa. IOWA CITY, Iowa. U.S.A. a. Metabolism of normal and overripe eggs. (Anura) h. Malformations. (Vertebrata) c. Sex differentiation (normal and experimental). Rana, Bufo, Alytes and Xenopus (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. (A^mphibia, Aves, Mammalia) g. Nutritional conditions in the incubating egg. (A.ves) WITTEK, Miss M. — Lab. d'Anat. et d'Embryol., Fac. de Med. de I'Univ., 97 Rue aux Laines, BRUXELLES, Belgique. a. Oogenesis. Lacerta vivipara and other species (Reptilia) (under direc- tion of J. J. PASTEELS) Woel 95 Ya WOELLWARTH. C. v. Dr Phil. — Heiligenberg-Inst., (17b) HEILIGEN- BERG, Kreis Ueberlingen/Bodensee, Deutschland. a. Determination des Gehirns (Isolations- und Transplantations-experi- mente). Triton (Urodela) WOERDEMAN. M. W. F.I.I.E.. M.D., D.Sc. (Oxon). Prof. — Anat.- Embryol. Inst. Gemeentelijkc Univ. van Amsterdam, Mauritskade 61, AMSTERDAM O.. Holland. a. Lcnsregencration. (Aves and Mammalia) b. Induction in tissue cultures and potencies of cells in tissue culture. (Aves and Mammalia) c. Development of specific substances during induction and regeneration. (Amphibia and Aves) WOLFF, Mrs Em. Dr es Sc. — Lab. de Zool. de la Fac. des Sci. et Lab. d'Embryol et Teratol. exper. du C.N.R.S.. Inst, de Zool. et de Biol. gen., 12 Rue de I'Universite, STRASBOURG, France, a. Role des hormones dans la differenciation du sexe par les methodes d'injections d'hormones et des castrations embryonnaires. Determination des caracteres somatiques precoces (syrinx et tubercule genital). Anas boschas (Aves) (en collaboration avec Et. WOLFF) ■ b. Recherches sur la differenciation et les besoins nutritifs en culture i n vitro de la syrinx et du tubercule genital de I'embryon. Anas boschas WOLFF, Et. C. F.I.I.E., Dr es Sc, Prof. — Lab. de Zool. de la Fac. des Sci. et Lab. d'Embryol. et Teratol. exper. du C.N.R.S., Inst, de Zool. et de Biol, gen., 12 Rue de I'Universite, STRASBOURG, France. a. Recherches experimentales sur I'Embryologie let la Teratologie. Monstres simples, monstres doubles et poly-emhryonie. (Aves) b. La differenciation sexuelle, par les methodes de greffes, de castration, d'injection d'hormones et d'explantations. Differenciation normale et inversion sexuelle des gonades, des voies genitales et des caracteres somatiques precoces. Gallus et Anas (Aves) (En collaboration avec Mrs Em. WOLFF, Mrs Y. LUTZ-OSTERTAG, Miss D. PFLE- GER. Miss B. SALZGEBER, A. HAMPe et G. STRUDEL) c. Problemes relatifs a la regeneration des Planaires d'eau douce. Origine des cellules de regeneration et processus d'induction dans la regenera- tion. Pohjcelis nigra, Euplanaria Ingnhris (Tricladidea, Turbellaria) (En collaboration avec Mrs Fr. STEPHAN-DUBOIS et Th. LENDER) d. Recherches sur la differenciation i n v i t r o des caracteres sexucls' embry- onnaires (gonades, canaux de Miiller etc.) et de differents organes. Besoins nutritifs des organes en culture. (Amniota) (En collaboration avec Miss K. HAFFEN, Mrs Em. WOLFF etc.) WOODGER. J. H. Prof. — Middlesex Hospital, Med. School. LONDON W. 1, England (U.K.) (no embryological work in progress) YAM ADA, T.' D.S. (Rigakuhakushi). Prof. — Biol. Inst., Fac. Sci., Nagoya Univ.,' Chigusa-Ku, NAGOYA, Japan. — Dept of Zool., Washington Univ.. ST. LOUIS 5, Mo., U.S.A. a. Double potential theory of early ontogenesis, its application to the regionality of the organizer action. (Vertebrata) b. Microphotometric estimation of desoxyribonucleic acid in the nuclei of different presumptive regions of the developing eggs. (Vertebrata and Evertebrata) (in collaboration with S. OSAWA, H. NAORA and A. SIBATANI) Yamada 96 Zaa c. Regional induction by some fractions of adult tissue tested on the isolated ectoderm. Triturus pyrrhogaster (Urodela) d. Behaviour of some phosphorous compounds in developing embryos, studied quantitatively. (Amphibia) (in collaboration with K. TAKATA) e. Significance of glycogen utilization in developing embryos, studied quantitatively. (Amphibia) (in collaboration with S. OSAWA) YAMAMOTO, K. Rigakushi (M.S.). Asst Prof. — Akkeshi Marine Biol. Stat., Hokkaido Univ., AKKESHI, Japan, (attached to the Sci. Fac. of Hokkaido Univ.) a. Study on the fertilization. Limandra schrenki, Oncorhynchus keta (Te- leostei) h. Study on the fertilization. Venerupis philippinatum (Bivalvia, MoU lusca) YAMAMOTO, T. DrSc. Prof. — Biol. Inst., Fac. Sci., Nagoya Univ., Chigusa-Ku, NAGOYA, Japan, a. On the mechanism of fertilization and activation. Otyzias latipes (Te- leostei) h. Experimental analysis of the development of sexual characters. Oryzias latipes (Teleostei) c. Experimental sex-reversal in the genetic males. Oryzias latipes (Te- leostei) YANAGIMACHI, R. Rigakushi (M.S.) — Zool. Inst.. Fac. of Sci., Hokkaido Univ., North 8. West 5, SAPPORO, Japan, a. Experimental analysis of fertilization process. Clupea pallasii C. & V. (Teleostei) (in collaboration with Y. KANOH) YANG FU YU B.Sc. — Lab. for Developm. Physiol., Inst, of Exper. Biol., Acad. Sinica, 865 Chang Ning Rd, SHANGHAI, China, (no data received on Nov. 1^*, 1952) YAO T. Ph.D. — Lab. of Developm. Physiol., Inst, for Exper. Biol.. Acad. Sinica, 865 Chang Ning Rd. SHANGHAI, China, (no data received on Nov. l^S 1952) YASHIKA, K. — Lab. of Embryol. and Exp. Morphol., Zool. Inst., Dept of Sci., Kyoto Univ., KYOTO, Japan, a. Hormonal mechanism of metamorphosis. Bombyx mod, Luehdorfia japo- nica (Lepidoptera) and Lucillia (Diptera) YNTEMA, C. L. F.I.I.E.. Ph.D.. Prof. — Dept of Anat., School of Med., State Univ. of New York, SYRACUSE 10, N.Y., U.S.A. a. Induction and differentiation of ear ectoderm. Ambystoma punctatum b. Regeneration of aneural limbs. Ambystoma punctatum (Urodela) c. Development of autonomic nervous system. Gallus domesticus (Aves) (in collaboration with W. S. HAMMOND) d. Effect of sulfa drugs on the embryo. Mus musculus (Rodentia) (in collaboration with W. S. HAMMOND) YOUNG, W. C. Ph.D., Prof. — Dept of Anat., Univ. of Kansas, Med. School, LAWRENCE, Kan.. U.S.A. a. Reproduction as influenced by hypothyroidism and hyperthyroidism in both males and females. Cavia porcellus (Rodentia) h. Sexual behavior in the male. Cavia porcellus (Rodentia) ZAAIJER. Miss J. J. P. M.Sc. — Lab. for Exper. Histol., Fac. of Med., Univ. of Leyden, Wassenaarseweg, Boerhaavekwartier, LEIDEN, Holland. Zack 97 Zw a. Factors governing dentin formation. Mus musculus (Rodentia) b. Role of the odontoblasts in the formation of secondary dentin. Mus musculus (Rodentia) c. Cartilage and bone formation in vitro. Homo sapiens (Primates) ZACKRY D. — Dept of Pathol., Coll. of Med., Baylor Univ., 1200 M. D. Anderson Blvd. Texas Med. Center. HOUSTON 5, Tex.. U.S.A. a. An investigation dealing with the transplantabihty of Hodgkin's Disease tissue in foreign species, using growth stimulating substances and modifying the donor tissue in various ways (in collaboration with B. L. NEWTON and J. M. ROSE) ZACWILICHOWSKA, Miss K. D.Sc. — Zool. Dept of the Jagellonian Univ., KRAKOW (Cracow), St Anne 6, Poland, a. Early developmental stages. Asellus aquaticus L, (Isopoda, Crustacea) (this work is temporarily in abeyance) ZAHND, J. P. — Inst. d'Embryol., Fac. de Med.. 1 Place de I'Hopital. STRASBOURG. France, a. Devcloppement du squelette. Facteurs influenqant le developpement. Anas (Aves) ZENKER. W. J. DrMed. — Anat. Inst, der Univ. Wien, Wahringerstr. 13, WIEN IX, Oesterreich. a. The prenatal and postnatal development of the Chiewitz' organ. Homo sapiens (Primates) (in collaboration with HALZL) ZEUTHEN, E. Dr Phil. — Lab. of Zoophysiol., Nat. Sci. Fac. Univ., of Copenhagen, Juliane Mariesvej 32, COPENHAGEN P, Denmark. a. Study with Cartesian divers of mitotic rhythm in metabohsm during cleavage period. (Echinodermata and Amphibia) (in collaboration with H. HOLTER) b. Determination of desoxyribonucleic acid in eggs and embryos, evidence of cytoplasmic desoxyribosides. (Amphibia) (in collaboration with E. HOFF-JORGENSEN) c. Mitotic rhythm in reduced weight (weight below water) during cleavage. Psammechinus microtuberculatus (Echinoidea) 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 15, England (U.K.) a. Study of oogenetic function. (Rodentia), ( Anthropoidea) , Mustela pu- torius furo L. (Carnivora) ZUIDWEG, M. H. J. — Anat.-Embryol. Inst., Gemeentelijke Univ. van Amsterdam, Mauritskade 61, AMSTERDAM O., Holland, a. Quantitative development of different proteins in the embryonic eye- lens. Gallus domesticus (Aves) ZWILLING. E. Ph.D., Assoc. Prof. — Dept of Genet., Coll. of Agric, Univ. of Connecticut, Storrs Agric. Exper. Stat., STORRS, Conn., U.S.A. a. Effects of thyroxin on the embryo. Gallus domesticus (Aves) b. Analysis of tail development. Gallus domesticus (Aves) c In vitro growth of embryo femur — effect of insulin. Gallus domes- ticus (Aves) d. Culture behavior of early embryonic tissues. Gallus domesticus (Aves) N. Africa 98 N. America (Canada) LIST OF INSTITUTES with Composition of Scientific Staffs (geoi^apiiical order) N. AFRICA Alexandria, Moharram Bey, Farouk I Univ., Fac. of Sci., Dept of Zool. GHAZZAWI, F. M. Prof., Head of Dept * SEDRA, S. N. Asst Prof. * MICHAEL. M. I. Demonstr. Rabat, Avenue Biarnay, Centre d'Etudes Superieures Scientifiques, Lab. de Biol. Anim. * METTETAL, C. Dir. S. AFRICA Bloemfontein, Univ. of the 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. Cape Town, Seapoint, Beach Rd, Div. of Fisheries BONDE, C. von Prof., Dir. DAVIES, D. H. Asst Prof., Officer (no data over some years) Johannesburg, Univ. of the Wit- watersrand, Med. School, Dept of Physiol. * GILLMAN, J. Prof. Med. School, Dept of Anat. * GILBERT, Miss Chr. Sen. Lect. Fac. of Sci., Dept of Zool. * BALINSKY, B. I. Lect. * KALK. Mrs M. Lect. * TROLLOPE, Miss E. M. * GUBBAY, Miss V. Pietermaritzburg, Univ. of Natal, Dept of Zool. SILBERBAUER, MRS B. I. (no data over some years) Potchefstroom, Potchefstroom Univ., Dept of Zool. EISELEN, G. T. S. Prof., Dir. * RYKE. P. A. J. Docent EEDEN, J. A. van Docent (no data on Nov. 1^', 1952) Pretoria, Univ. of Pretoria, Fac. of Sci., Zool. Inst. MALAN, D. E. Prof., Head * ELOFF, F. C. Lect. * LOMBARD, G. L. 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. * MALAN, Miss M. E. Sen. Lect. Guest-workers: * BARRY, T. H. * PRINS, F. X. * VERMAAK, D. * WESTHUIZEN, C. M. v. d. * PENTZ, Miss K. * SMIT, A. L. * FRANK. G. H. * ENGELBRECHT, D. v. Z. N. AMERICA CANADA ALBERTA (Alta) Edmonton, Univ. of Alberta, Med. School, Dept of Anat. * SHANER, R. F. Prof., Dir. Names of investigators who have sent in their data over this year. Canada (B.C. 99 United States (Cal.) BRITISCH COLUMBIA (B.C.) Vancouver, Univ. of British Columbia, Dept of Zool. CLEMENS, W. A. Head * FORD. P. Prof. Histol. & Embryol. NOVA SCOTIA Wolfville, Acadia Univ., Fac. of Sci., Dept of Biol. BAYNE, P. M. Prof., Chairman McCALLION, D. J. Asst Prof, (no data on Nov. 1^', 1952) ONTARIO (Ont.) Guclph, Ontario Agricultural Coll., Dept of Entomol. and Zool. (no embryol. work in progress) Hamilton, McMaster Univ., Fac. of Arts and Sci., Hamilton Coll., Dept of Zool. Kingston, Queens Univ., Med. School. * KROPP, B. N. Prof.. Dir. London, Univ. of Western Ontario, Dept of Zool. * BATTLE, Mis H. I. Prof. UNITED STATES ALABAMA (Ala) Birmingham 5, 620 Scouth 20th Str., Med. Center of the Univ. of Ala- bama, Schools of Med. and Dent., Dept of Anat. FOLEY, }. O. Prof., Chairman * SENSENIG, E. C. Assoc. Prof. * KLAPPER. CI. E. Asst Prof. * BOYER, C. C. Asst Prof. CALIFORNIA (Cal.) Berkeley 4, Univ. of California, Dept of Zool. * EAKIN, R. M. Prof. BERG, W. E. Asst Prof. * HARRIS, M. Assoc. Prof. KUTSKY, P. B. Res. Assoc. MAZIA, D. Assoc. Prof. * BERNSTEIN, M. H. * DRISCOLL, W. T. * HARVEY. E. B. * KAVANAU, J. L. QUEBEC Montreal, McGill Univ., Dept of Zool. BERRILL, N. J. Prof. (no data on Nov. 1^«, 1952) Dept of Anat. * LEBLOND. C. P. Prof. * GREULICH, R. Montreal, 2900 Boulevard du Mont Royal, Univ. de Montreal, Fac. de Med., Dept d'Histol. et d'Embryol. BONIN, W. Prof., Dir. FRAPPIER. J. Prof., Asst (no embryol. work in progress) Ottawa, Univ. of Ottawa, Fac. of Med., Dept of Anat. * MENSCHIK. Z. Asst Prof. Dept of Histol. * BfiLANGER, L. F. Prof. SASKATCHEWAN Saskatoon, Univ. of Saskatchewan, Fac. of Anat. JACKSON, G. L. Dir. ALTSCHUL, R. Assoc. Prof. (no data over some years) * KUTSKY. R. J. * THURMOND, W. Los Angeles 24. Univ. of California. Dept of Zool. * SCHECHTMAN, A. M. Assoc. Prof. * HEIM, W. G. * HOFFMAN, H. * NISHIHARA. T. * SCHJEIDE. A. O. * WELLER. E. * KNIGHT. Miss P. Palo Alto, Stanford Univ., Dept of Biol. * DUSHANE. G. Prof. WHITAKER, D. Prof. Pasadena 4, California Inst, of Technology, Div. of Biol., Dept of Embryol. * TYLER, A. Prof., Head of Dept U. S. (Cal. 100 U. S. (111.) * JAFFE, L. Grad. stud, and Research Fellow VOGT. Miss M. (from Neustadt, Germany) * MERRIT, Mrs J. K. Research Asst Stanford, Stanford Univ., Dept of Biol. Sci. * TWITTY, V. C. Prof., Dir. * NIU, M. C. * ALGARD, F. T. * KING, R. * JACOBSEN, A. * CHURCH. G. Dept of Anat. * HEATH, H. D. COLORADO (Col.) Boulder, Univ. of Colorado FOX, J. J. (no data on Nov. 1^*, 1952) Denver 7, 4200 east Ninth Ave, Univ. of Colorado, Med. Center, Dept of Pediatrics GORDON, H. H. Head of Dept * HERRMANN, H. Prof., Dir. Lab. of Chem. Embryol. * LUBCHENKO, L. * MACKENZIE, J. * NEUKOM, B. J. * ROTHFELS, U. * LERMAN, L. CONNECTICUT (Conn.) Middletovi^n, Wesleyan Univ., Dept of Biol. GOODRICH, H. B. Prof., Dir. * CASPARI, E. W. Prof. New Haven, Yale Univ., School of Med. * STONE, L. S. Prof. Osborn Zool. Lab. NICOLAS. J. S. Prof., Dir. HARRISON, R. G. Prof. (Emer. ) BOELL, E. J. Prof. STONE. L. S. Prof. POULSON. D. F. Assoc. Prof. METZ, C. B. Asst Prof. SHEN. S. C. Res. Asst TRINKAUS. J. P. Instr. WILENS. Miss S. Res. Asst KRUGELIS. Miss E. L. Res. Asst (Boston. Mass.) * RUDNICK, Miss D SIPPEL. T. * VILLAFRANCA, G. W. de Storrs, Univ. of Connecticut, Dept of Zool. CLARK. H. (no data on Nov. 1^*, 1952) Storrs Agric. Exp. Stat.. Coll. of Agric, Dept of Genet. * LANDAUER. W. Prof., Dir. * ZWILLING, E. Assoc. Prof. DAZIENS, Mrs M. * RHODES, Mrs M. GEORGIA (Ga) Atlanta, Emory University, Dept of Biol. * CLEMENT, A. C. Prof. * HUNT, E. L. Prof. * BUTROS, J. Grad. stud. * IVEY, W. D. Grad. stud. Augusta, Univ. of Georgia, Med. School, Dept of Anat. HEUSER, C H. Prof. (Emer.) (no data over some years) ILLINOIS (111.) Chicago 37, Univ. of Chicago, Physiol. Lab. * LILLIE, R. S. Biol. Sciences Div., Dept of Zool. MOORE, C. R. Prof. (Embryo- logy, Sex Biology). Chairman V/EISS, P. A. Prof. (Embryo- logy, Exp. Morphology), Dir. PRICE, Miss D. Assoc. Prof. (Embryology, Sex Biology) ANDRES, G. Res. Fellow OVERTON, Miss J. Res. Asst. PETZOLD. R. Res. Asst. WALLMAN, Miss D. WASHINGTON. Miss D. FERRIS. W. R. LASH. J. W. JAROS. Mrs R. M. (no data on Nov. l^\ 1952) Chicago 37, 5700 S. Ingleside, Univ. of Chicago, Whitman Lab. * MINTZ, Miss B. Asst Prof. I U. S. (111.) Evanston, Northwestern Univ., Cresap Biol. Lab. WATTERSON, R. L. (no data on Nov. 1^'. 1952) Morton Grove, Baxter Inst, for Med. Research * WINDLE, W. F. Prof.. Dir. * LITTRELL, }. L. Res. Assoc. Urbana, Univ. of Illinois, Dept of Zool. * ADAMSTONE. F. B. Prof., Head of Dept ROSE, S. M. Assoc. Prof. KUGLER. O. E. Assoc. Prof. * TWEEDELL, K. S. INDIANA (Ind.) Bloomington, Ind. Univ., Dept of Zool. * EBERT, J. D. Franklin, Franklin Coll. * RHODES. S. A. IOWA Ames, Iowa State Coll., Div. of Sci., Dept of Zool. and Entomol. HARRIS, H. M. Dir. * HAMILTON, H. L. Assoc. Prof. Iowa City, State Univ. of Iowa, Zool. Labs * WITSCHl E. Prof., Dir. of Embryol. Lab. * BRUNER. Miss J. A. Res. Assoc. * CHANG, C. Y. Res. Assoc. Dept of Zool. * KOLLROS, J. J. Prof. * BARCH, Mrs S. Res. Asst * PEPERNIK. Mrs V. Res. Asst KANSAS (Kan.) Lawrence, Univ. of Kansas, Dept of Zool. HALL, R. E. JOHNSON, I. S. (no data over some years) Med. School, Dept of Anat. * ROOFE, P. G. Prof., Dir. * TRACY, H. C. Prof. * YOUNG, W. C. Prof. * LATIMER. H. B. Prof. 101 U. S. (Md) * BATTY. Th. V. Asst Instr. * WINBLAD, J. N. Grad. stud. * WENGER, Mrs E. L. * WENGER, B. S. KENTUCKY (Ky) Louisville 2, 101 West Chestnut Str., Univ. of Louisville, School of Med., Dept of Anat. * HALL, E. K. * ROOSEN-RUNGE. E. C. MAINE (Me) Bar Harbor, 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. AVIS, F. CRARY, D. D. * SMITHBERG. M. MARYLAND (Md) Baltimore 1, Univ. of Maryland, School of Med., Dept of Anat. * McCAFFERTY, R. E. Baltimore 5, Wolfe and Madison Strs, Carnegie Inst, of Washington, Dept of Embryol. * CORNER. G. W. Prof.. Dir. * BURNS. R. K. Member * REYNOLDS. S. R. M. Member * RAMSEY, Mrs E. M. Res. Assoc. * HERTIG, A. T. Res. Assoc. (extramural) * BARTELMEZ, G. W. Consultant * GILLMAN, J. Res. Assoc. (extramural) * CSAPO, A. I. Member * BOVING, B. G. Assoc. Member * BISHOP, D. W. Member Baltimore 18, The Johns Hopkins Univ., Fac. of Phil., Dept. of Biol. * WILLIER, B. H. Prof., Dir. * BURNS, R. K. Hon. Prof. * RAWLES, Miss M. E. Res. Assoc. U. S. (Md) * SIPPEL, T. O. Instr. * KONIGSBERG. I. R. Bruce Fellow * COULOMBRE. A. J. Bruce Fellow * GRABOWSKI, C. T. N.S.F. Fellow Beltsville, U.S. Dept of Agric, Bureau of Anim. Industry CASE. J. F. (no data on Nov. 1^', 1952) Bethesda, Nat. Cancer Inst., Developmental Physiol. Unit. * GROBSTEIN, C. Maryland, Army Chemical Center, Med. Div. * BODENSTEIN, D. * KRAUSS, M. Washington 7, D. C, Georgetown Univ.. School of Med. * KARCZMAR, A. G. MASSACHUSETTS (Mass) Boston 15, 25 Shattuck Str., Harvard Univ., Med. School, Dept of Anat. WISLOCKI, G. B. Prof., Dir. * SNYDER, F. F. Assoc. Prof. Dept of Pathol. * HERTIG, A. T. * ROCK, J. Boston 15, 221 Longwood Ave, Boston Lying-in Hospital * HERTIG, A. T. Brookline, 245 Pond Ave, Free Hospital for Women * HERTIG, A. T. * ROCK. J. * MULLIGAN, W. J. Cambridge 38, Divinity Ave, Harvard Univ., Biol. Lab. HOADLEY, L. Prof. (Embryol.) ROSENBAUM, R. M. DAWSON, A. B. Prof. (Hist, and Cyt.) MOULTON, }. M. WETMORE, R. H. (no data over some years) Cambridge 39, Massachusetts Inst, of Technol., Dept of Biol. 102 U. S. (Mo.) LAMY, F. (no data on Nov. 1^^ 1952) Northampton, Smith Coll., Dept of Zool. TE WINKEL, Miss L. E. Chairman * CARPENTER. Miss E. VILLAFRANCA. G. de Shrewsbury, 222 Maple Ave, Worcester Foundation for Exper. Biol. * PINCUS. G. Prof.. Dir. * CHANG, M. C. Woodshole, Marine Biol. Stat. ARMSTRONG, P. B. Prof., Dir. 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. KRAMER, T. C. Asst Prof. ROGERS. K. T. (no data over some years) Dept of Zool. BROWN, D. E. S. Chairman STOCKARD, A. H. Assoc. Prof. * MARKERT, C. L. Asst Prof. * KEMP, N. E. Asst Prof. MINNESOTA (Minn.) MinneapoHs 14, Univ. of Minnesota, Coll. of Sci., Lit. and Arts, Dept of Zool. MINNICH, D. E. Chairman * SPRATT Jr. N. T. Prof. School of Med., Inst, of Anat. BOYDEN, E. A. Head of Dept WELLS, L. J. Prof. HARTMANN, J. F. Asst Prof. (no data on Nov. 1==^ 1952) MISSOURI (Mo.) Columbia, Univ. of Missouri, Dept of Zool. ELDER, W. H. Prof.. Chairman NOVITSKI, E. Assoc. Prof. * SHAVER. J. R. Asst Prof. U. S. (Mo.) St. Louis 5. Lindell and Skinker Aves, Washington Univ., Dept of Zool. * HAMBURGER. V. Prof., Head of Dept HALL, T. S. Assoc. Prof. HEATH. H. D. Instructor * MOOG, F. Assoc. Prof. * LEVI— MONTALCINI. Miss R. Assoc. Prof. NEW JERSEY (NJ.) Princeton, 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.Y.) Brooklyn 2. 96 Schermerhorn Str.. St John's Univ., Coll. of Pharmacy * GENNARO Jr, J. F. Brooklyn 10, Bedford Ave and Ave H., Brooklyn Coll.. Dept of Biol. * CHENEY, R. H. Prof. Brooklyn 12, Linden Boulevard and Rockaday Parkway. Beth-el Hospital * GRUENWALD, P. Dir. of Labs Buffalo, 24 High Str.. School of Med., Dept of Anat. * HUMPHREY, R. R. Prof. Ithaca, Cornell Univ.. Dept of Zool. ADELMANN. H. B. * SINGER, M. Prof. New York, 66th Str., York Ave. Rockefeller Inst, for Med. Res. MIRSKY. A. Dir. (no data received) New York, New York Univ.. Dept of Zool. * DALTON, H. C. Asst Prof. New York 16, 477 First Ave. New York Univ.. Coll. of Dentistry. . Dept of Histol. GOLDSMITH. E. D. (no data received) New York 33. 186th Str. and 103 U. S. (N. Y.) Amsterdam Ave. Yeshiva Univ., Dept of Biol. ATLAS. M. Assoc. Prof. (no data on Nov. 1*'. 1952) New York 27, Broadway and 116th Str., Columbia Univ.. Fac. of pure Sci., Dept of Zool. * MOORE. J. A. Prof.. Head of Dept * BARTH, L. G. Prof. * BARTH, Mrs L. J. Res. Assoc. * GRANT, Ph. * GREGG, J. R. Asst Prof. * MOORE, Mrs B. C. * SZE, L. C. Res. Assoc. * WAELSCH. Mrs S. G. Res. Assoc. New York 32, 632 West 168th Str., Columbia Univ., Coll. of Phys, and Surg.. Dept of Radiology. Radiol. Res. Lab. FAILLA, G. Prof., Chairman * RUGH, R. Assoc. Prof. Dept of Anat. COPENHAVER. W. M. Prof. DETWILER. S. R. (no data received) Dept of Zool. PEASE, D. C. (no data received) New York, Flushing 67. L. I.. Queens Coll.. Dept of Biol. * COLWIN. A. L. Prof. * COLWIN. Mrs L. H. Prof. Rochester 3. Univ. of Rochester, Coll. of Arts and Sci.. Dept of Biol. CHARLES. D. R. Dir. * HOLTFRETER. J. K. F. Prof. STEVENS. L. C. * TOWNES. Ph. L. * MUCHMORE, W. B. * LUMB, Miss E. S. * SPIEGEL, M. * SPAR, I. L. * SMITHBERG, M. Schenectady 8, Union Coll., Dept of Biol. CLARK, L. B. SCOTT. A. C. * RAPPAPORT Jr.. R. U. S. (N. Y.) Syracuse 10, State Univ. of N.Y. Med. Coll.. Dept of Anat. * ARMSTRONG, P. B. Prof.. Chairman * YNTEMA, C. L. Prof. * SPOFFORD, W. R. Assoc. Prof. * HAMMOND, W. S. Assoc. Prof. Dept of Zool. * EVANS. H. J. NORTH CAROLINA (N.CO Chapel Hill, Univ. of N. Carolina, Dept of Zool. COSTELLO, D. P. Kenan Prof,. Chairman of Dept LEHMAN, H. E. Asst Prof. HENLEY. Miss C. Ress. Assoc. KENT, D. E. Collaborator (no data on Nov. 1^*. 1952) Durham, Duke Univ.. Dept of Zool. GRAY. I. E. Prof.. Dir. HARGITT. G. T. Prof. (Emer.) PEARSE, A. S. Prof. (Emer.) * BOOKHOUT, C. G. Assoc. Prof. * NACE, G. W. Asst Prof. * HORN. E. C. Asst Prof. OHIO Columbus 10. Ohio State Univ., Dept of Anat. KNOUFF. R. A. Chairman BAKER. R. C. Prof. EDWARDS. L. F. Prof. GARRET. F. D. Asst Prof. LEACH. W. J. Asst Prof. HAYES. E. R. Asst Prof. SHELLHAMER. R. H. Grad. (no data over some years) Asst OKLAHOMA (Okla) Oklahoma City, Univ. of Oklahoma. School of Med.. Dept of Anat. LACHMAN, E. Chairman * RICHTER, K. Assoc. Prof. * CAIRNS, J. M. Asst Prof. OREGON (Ore.) Corvalhs, Oregon State Coll., Dept of Zool. * HILLEMANN, H. H. 104 U. S. (Pa) Eugene, Univ. of Oregon, Lib. Arts and Grad. Coll., Dept of Biol. RISLEY, P. L. Head of Dept HUESTIS, R. R. Prof. CLANCY, C. W. Assoc. Prof. SODERWALL. A. L. Asst Prof. (no data over some years) Portland 3. Univ. of Portland, Coll. of wSci., Physiol. Lab. * MOORE, A. R. Prof.. Dir. PENNSYLVANIA (Pa) Bryn Mawr, Bryn Mawr Coll., Dept of Biol. GARDINER, Miss M. Dir. * OPPENHEIMER, Miss J. M. Philadelphia 4. Univ. of Pennsylva- nia. School of Med.. Dept of Anat. * FLEXNER. L. B. Prof.. Chairman * WINDLE. W. F. Visiting Prof. CLARK. E. R. Prof. (Emer.) * WILLIAMS. R. G. Prof. * HOGUE, Miss M. J. Assoc. Prof. PIATT. J. Assoc. Prof. CHAMBERS. W. W. Asst Prof. * LIU, J. C. Asst Prof. * WILLIAMS. S. C. Assoc. Prof. WIERDA. J. L. Asst Prof. Dept of Zool. HEILBRUNN. L. V. Prof., Dir. FLICKINGER. R. A. Prof. NELSEN. O. E. Prof. PARMENTER. C. L. (no data over some years) Philadelphia 11, Fox Chase, Bur^ holm Ave, Lankenau Hosp. Res. Inst, and Inst, for Cancer Res.. Dept of Embryol. REIMANN. S. P. Dir. of Inst. * BRIGGS, R. W. Head of Dept * GREEN. Mrs E. U. Res. Assoc. * KING. T. J. Res. Fellow Pittsburgh 13, Univ. of Pittsburgh, School of Med.. Dept of Anat. * HOOKER. D. Prof.. Head of Dept * DONALDSON. J. C. Prof. U. S. (Pa) * HUMPHREY. Miss T. Prof. * SNOOK, T. Assoc. Prof. PRIMAN, J. Assoc. Prof. * REYER. R. W. Asst Prof. * HOLTZER, H. Instr. Dept of Biol. Sci. GRAY, P. Prof.. Head of Dept BUCHSBAUM, R. Prof. ORTON. G. L. Lect. GOODMAN, D. B. Grad. Stud. Asst RIDLEY, Miss J. E. Grad. Stud. Asst WESTRICK, Miss M. Grad. Stud. Asst WIRTH, Miss P. Grad. Stud. Asst (no data over some years) Pittsburgh 19, Duquesne University HECKERMAN, R. O. (no data on Nov. 1^*, 1952) RHODE ISLAND (RJ.) Kingston, Univ. of Rhode Island, Dept of Zool. KNUTSON. H. E. Prof., Head of Dept * HARTUNG, E. W. Assoc. Prof. Providence 12, Brown Univ., Arnold Biol. Lab. * WILSON. J. W. Prof.. Head of Dept * CHASE, H. B. Assoc. Prof. * EDDS Jr, M. V. Asst Prof. * WEISZ, P. B. Asst Prof. TENNESSEE (Tenn.) Memphis 3, Univ. of Tennessee, Fac. of Biol. Sci., Med. Units Div. * ALDEN, R. H. Chief of Div. of Anat. * FITZGERALD, L. R. Instr. * COHN, S. A. Instr. TEXAS (Tex.) Austin 12, Univ. of Texas, Dept of Zool. OLIVER. C. P. Chairman (no data on Nov. 1^', 1952) Galveston, Univ. of Texas, Med. Branch, Dept of Anat. 105 U. S. (Wash.) DUNCAN, D. Dir. * SINCLAIR, J. G. Prof. * BLOUNT, R. F. Prof. Houston 5, 1200 M.D. Anderson Blvd. Texas Med. Center, Baylor Univ., Coll. of Med. Dept of Anat. ROBERTSON. G. G. Assoc. Prof. PERRY, J. H. Assoc. Prof. HETTIG, R. A. Assoc. Prof, (no data over some years) Dept of Pathol. * NEWTON. B. L. Asst Prof. GALINSKY, I. San Antonio, Robt. B. Green Hosp. * MANHOFF, L. J. UTAH Salt Lake City, Univ. of Utah, Dept of Genet, and Cytol. * NEWBY. W. W. Head of Dept VERMONT (Vt) Burlington, Univ. of Vermont, Coll. of Med., Dept of Anat., Lab. of Histol. and Embryol. NEWHALL, C. Assoc. Prof., Chairman JORDAN. H. Prof. DUNIHUE, F. Assoc. Prof. STULTZ, W. Assoc. Prof. NOVIKOFF. A. B. (no data over some years) VIRGINIA (Va) Charlottesville, The Univ. of Vir- ginia, Miller School of Biol. * DENT, }. N. Assoc. Prof. School of Anat. * McKEEHAN. M. S. Morgantown, West Virginia Univ. School of Med. DODDS, G. S. Dir. CHANDLER, S. B. Prof. WILLIAMS, T. W. Prof, (no embryol. work in progress) WASHINGTON (Wash.) Friday Harbor, Friday Harbor Labs WHITELEY, A. H. Prof, (no data over some years) U. S. (Wash.) Seattle 5. Univ. of Washington, Dept of Zool. MARTIN, A. W. Dir. FERNALD, R. L. (no data over some years) Spokane 1 1 , Gonzaga Univ., Dept of Biol. FOUBERT Jr., E. L. Dir. GUBBINS, J. F. Asst Prof. (no embryol. work in progress) WISCONSIN (Wis.) Madison, Univ. of Wisconsin, Dept of Anat. MORTENSEN, O. A. Chairman 106 Asia (China) BAST, T. H. Prof. MOSSMAN, H. W. Assoc. Prof. ORSINI. Mrs M. WARD — (no data on Nov. 1^', 1952) Milwaukee 3, 1217 West Wisconsin Ave, Marquette Univ., Dept of Biol. * REIS, R. H. Assoc. Prof., Head of Dept STEIL. W. N. Prof. McDONOUGH, E. S. Assoc. Prof. PERRY, J. C. Assoc. Prof. BROWN, V. E. Asst Prof. O'BRIEN, J. P. Asst Prof. * SAUNDERS, J. W. Asst Prof. S. AMERICA ARGENTINA Buenos Aires, Bolivar 1128, Minist. de Salud Publ. de la Nac, Centr. de Investig. * DEL CONTE, E. Dir. * CHIRIBOGA, J. * FONTANA. J. S. * IMBRIANO, O. * MONET, Miss N. A. * SIRLIN, J. L. Tucuman, Miguel Lillo 205, Univ. Nac. de Tucuman, Fac. de Ci. Biol., Inst, de Zool. CEI, J. M. Dir. PISANO, A. Prof. Embryol. BARBIERI, F. Ayudante Inv. (no data over some years) BRASIL Porto Alegre, Avenida Joao Pesoa, Fac. de Filos., Lab. de Genet. CORDEIRO, A. R. (no data on Nov. 1^', 1952) CHINA Hangchow, Nat. Univ. of Chekiang, Dept of Biol. KIANG. H. M. Prof. CHOW, P. S. Lect. CHILE Santiago, Av. Irarrazaval 849, Dept de Med. Exper. del Servicio Nacional de Salubridad * LIPSCHUTZ, A. Prof., Dir. IGLESIAS. R. Exp. Res. BRUZZONE, S. Exp. Res. FUENZALIDA, F. Biochemist MARDONES, Miss E. Exp. Res. Santiago, Casilla 2988, Univ. de Chile, Inst, de Biol. ,,Juan Noe" * BRIONES. H. URUGUAY Montevideo, Fac. de Med., Dept de Histol. y Embryol. BUNO. W. Prof., Dir. FERREIRA, W. A. Asst. FRANCHI, C. M. Asst. ALVAREZ GUTTieRREZ, Miss J. Asst GONZALEZ MARINO, P. (no data over some years) ASIA TSAI, Miss N. Asst (no data over some years) Peiptng, Ching Shan Tung Chieh, Nat. Univ. of Peking, Coll. of Sci., Dept of Zool. LI, J. C. Prof. Asia (China) 107 WANG. Y. T. Asst LIAO, Y. K. Asst LI. Miss S. C. Asst (no data over some years) Shanghai, 865 Chang Ning Road, Acad. Sinica, Inst, of Exper. Biol., Lab. of Developm. Physiol. PAI, S. Dir. of Inst. TUNG. T. C. Vice Dir. TCHOU SU Dir. of the Lab. CHUANG HSIAO HUI Res. Fellow YAO, T. Res. Fellow CHANG KO Res. Fellow CHU, J. Asst Res. Fellow CHIANG TIEN CHI Asst Res. Fellow TSENG. M. P. Res. Fellow HO TSE YING Res. Asst SHEN SHU MING Res. Asst WANG YU LAN Res. Asst CHENG CHU YING Res. Stud. YANG FU YU Res. Stud. CHANG. K. P. Res. Stud. KAN TIEN LI Res. Stud. (no data on Nov. 1^*, 1952) Tsingt^vo, Marine Biol. Lab. TUNG, T. C. (no data over some years) INDIA Behar, Patna, Prince of Wales Med. Coll., Dept of Anat. SINHA, T. P. Prof. (no data over some years) Calcutta 26, Cell Research Unit, Chittranjan Cancer Hospital * MOOKERJEE. S. Colombo 8, Ceylon, Kynsey Rd, Univ. of Ceylon. Fac. of Med., Dept of Anat. CHANMUGAM. P. K. Dir. (no embryol. work in progress) ISRAEL Jerusalem, The Hebrew Univ., Dept of Zool. FELDMAN, M. * EYAL-GILADI, Mrs H. MOSCONA. A. MOSCONA. Mrs H. Asia (Japan) * SHULOV, A. Dept of Chemistry LICHTENSTEIN, N. JAPAN Fukuoka, Kuyushu Univ., Fac. of Sci., Biol. Inst. * KAWAKAMI, I. KAWAKAMI, Mrs K. I. Ikeda, Osaka Pref., Osaka Liberal Arts Univ., Lab. of Morphol. * NAKAMURA, O. Prof. * TAHARA. Y. Kyoto, Kyoto Univ., Dept of Sci., Zool. Inst., Lab of Embryol. and Exp. Morphol. * ICHIKAWA, M. Prof., Dir. * TAKAYA. H. Asst Prof. * IKUSHIMA, N. Asst * MASUDA, H. Guest * OKADA, T. Res. Stud. * YASHIKA, K. Res. Stud. Nagoya, Tashiro-Cho, Chigusa-Ku, Nagoya Univ., Fac of Sci., Biol Inst. * YAMAMOTO, T. Prof., Dir. * SATO, T. Prof. * YAMADA, T. Prof. * HAYASHI, Y. Lect. * NAKANO. E. Lect. * TAKATA. K. Asst * OSAWA, S. * KUNO. M. 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 Sapporo, North 8, West 5, Hok- kaido Univ., Fac. of Sci., Zool. Inst. * UCHIDA, T. Prof. * MAKING. S. Prof. * ICHIKAWA. A. Prof. * KANOH. Y. Asst Prof. * AOTO. T. Asst * YANAGIMACHI. R. Res. Stud. * YAMAMOTO. K. (Asst Prof.. Akkeshi Marine Biol. Stat.) Asia (Japan) Sendai, Tohoku (Imperial) Univ., Inst, of Biol., Lab. of Embryol. MOTOMURA, I. Prof., Dir. (no data on Nov. 1"*, 1952) Sugashima-Mura, Shima-gun, Mie- ken, Nagoya Univ., the Sugashima Marine Biol. Stat. * SUGIYAMA, M. Dir. * ISHIKAWA. M. Asst Tokyo, Meguro-ku, Tokyo Metro- politan Univ., Fac. of Sci., Dept of Biol., Embryol. Section * DAN. K. Prof., Head of Sect. * OKAZAKI, Miss K. Ress. Asst * DAN, Mrs J. C. Tokyo, Univ. of Education, 108 Europe (Austria) Inst, of Zool. * OKA, H. Prof.. Head USUI, M. Lect. SEKIGUCHI, K. Asst Tokyo, Musashino-shi, Seikei Univ., Biol. Inst. * KAJISHIMA, T. Yokohama-Hiyoshi, Keio Univ., Biol. Lab. * MORI, Y. Prof., Head of the Biol. Inst. * MORI, H. Asst Prof. * HAMA, T. Asst Prof. * GOTO, T. Asst . * KATAKURA, Y. Lect. * ENDO, Y. Lect. AUSTRALIA AUSTRALIA Brisbane, George Str., Univ. of Queensland, Dept of Zool. STEPHENSON, W. Prof. BLEAKLY, M. C. Lect. * MATHER, W. B. Lect. Sydney, Glebe, Parramatta Rd., Div. of Anim. Health and Product., Commonwealth Sci. and Industr. Res. Org., McMaster Anim. Health Lab. GILL, D. A. Officer-in-Charge * AUSTIN. C. R. Sen. Res. Officer * BRADEN, A. W. H. Res. Officer * HARDY, Miss M. H. Senior Res. Officer (Guest-worker from C.S.I.R.O., Wool Biol. Lab., 17 Randle Str., Sydney) Sydney, 17 Randle Str., Common- wealth Sci. and Industr. Res. Org., Wool Biol. Lab. CARTER, H. B. Dir. HARDY, Miss M. H. Res. Officer DAVIDSON, Miss. P. Res. Officer (no data on Nov. 1^*, 1952) Sydney, Univ. of Sydney, Common- wealth Sci. and Industr. Res. Org., Anim. Genet. Sect. RENDEL, J. M. Head of Sect. * ERASER, A. S. SOBEY, W. B. DOWLING, D. F. Sydney, Univ. of Sydney, Dept of Zool. * MURRAY, P. D. F. Prof.. Dir. Dept of Histol. and Embryol. STUMP, C. W. Dir. * CLELAND, K. W. * O'BRIEN, B. R. A. NEW ZEALAND Auckland, Univ. Coll. STEPHENSON, N. G. (no data on Nov. 1^*, 1952) EUROPE AUSTRIA Innsbruck, Tyrol, Histol. -Embryol. Inst, der Univ. * SAUSER, G. Prof., Vorstand Wicn IX, Wahringerstr. 13, Anat. Inst, der Univ. Wien. KRAUSE, W. * PRIESCHING, A. * ZENKER, W. J. Belgium 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. MARLIER, G. Asst (no data on Nov. 1^', 1952) Bruxelles, 97 Rue aux Laines, Fac. de Med. de I'Univ., Lab. d'Anat. et d'Embryol. * DALCQ, A. M. Prof., Head of Dept * PASTEELS, J. Prof. TWIESSELMANN, F. Chef des travaux * MULNARD, J. Asst * EGMOND, Miss M. Th. C. van (from Utrecht. Holland) Lab. d'Histol. GERARD, P. Head of Dept CORDIER, J. Prof. LISON, L. (no embryol. work in progress) Bruxelles-Auderghcm, 1850 Chaus- see de Wavre, Univ. libre de Bruxelles, Lab. de Morphol. anim. * BRACHET, J. L. A. Prof., Dir. * STEINERT, M. Asst * FICQ, A. A. Asst THOMAS, R. post grad. stud. Foreign Guest-workers: * GOTHIE, Miss M. M. C. S. (Paris) * KUUSI. Miss T. K. (Helsinki) * URBANI, E. (Roma) Gent, Bylokekaai 1, Univ. of Gent, Fac. of Med., Lab. of Anat. FAUTREZ, J. C. Prof., Dir. FAUTREZ— FIRLEFYN. Mrs N. J. VAKAET, L. C. (no data on Nov. \^\ 1952) Gent, Universiteitsstr. 14. Lab. voor Zool., Afd. Morphol. DE CONINCK, L. A. P. Prof. HUBLfi, J. Guest-workers: * DENUCfi, J. M. 109 Finland DIERCKS. Fr. Liege, Quai Van Beneden 22, Inst. Zool. Ed. van Beneden, Dept de Morph. des Chordes * DAMAS, H. F. C. charge de cours Louvain, 38 Rue des Recollets. Univ. de Louvain. Inst. d'Anat. * CAMPENHOUT. E. van Prof., Dir. * MASY. Miss S. * MEYER, R. de Louvain, 71 Rue de Namur, Univ. de Louvain, Inst, de Zool., Lab. d'Embryol. VANDEBROEK, G. Prof., Dir. JANSSENS, J. CLAES, M. T. BONfi, E. (no data over some years) DENMARK Copenhagen P. Juliane Mariesvej 30, Univ. of Copenhagen, Fac. of Med., Inst, of Biochemistry EGE, R. Head * HOFF-J0RGENSEN, E. Lect. Copenhagen ^, Juliane Mariesvej 32, Univ. of Copenhagen, Nat. Sci. Fac, Lab. of Zoophysiol. BRANDT REHBERG. P. Head * ZEUTHEN. E. Lect. Copenhagen ^. Universitetsparken 3, Inst, for Aim. Zool. * BR^NSTED, H. V. Prof., Dir. HOLST CHRISTENSEN, P. Amanuensis Copenhagen, Valby, 8 Gl. Carls- bergvej, Carlsberg Lab., Cytochem. Dept * HOLTER, H. Head of Dept * LOVTRUP, S. Asst ENGLAND (Vid. UNITED KINGDOM) FINLAND Helsinki, Univ. of Helsinki, Fac. of Med., Dept of Anat. PESONEN, N. Head of Dept * HJELMMAN, G. Prof. MUSTAKALLIO, M. Prosector Finland Helsinki, P.-Rautatiekatu 13, Univ. of Helsinki, Fac. of Mathem. and Nat. Sci., Zool. Lab., Dcpt of Physiol. SUOMALAINEN. P. Prof.. Dir. of Lab., Head of Dept * TOIVONEN. S. Prof. * KUUSI. Miss T. Helsinki, Womens Clinic * PESONEN, S. K. Turku, Univ. of Turku, Zool. Lab. MARJANEN, P. (no embryol. work in progress) FRANCE Clermont'Ferrand, 1 Ave Vercinge- torix. Lab. de Zool. HOVASSE, R. Dir. * LUTZ, H. Maitre de Conf. * LUTZ— OSTERTAG. Mrs Y. Attachee de Recherches Marseille, Place Victor Hugo, Lab. de Zool. gen. de la Fac. des Sci. et Srat. de marine d'Endoume (Mar- seille) ABELOOS, M. Prof., Dir. (no data over some years) Nancy, (Meurthe 6 Moselle), 31 Rue Lionnois, Fac. de Med. de Nancy, Lab. d'Anat., Inst. Anat. * BEAU, A. A. Prof., Chaire d'Anat. norm, et d'Organog. Lab. d'Histol. et Embryol. COLLIN, R. Prof.. Dir. * DOLLANDER, A. Del. Agr. * GRIGNON, G. Assist, de trav. prat. * LAURENT, M. Moniteur de trav. prat. Students: * LABADIE. Miss G. * LEVAN DIEM, P. * MELNOTTE, P. J. Paris Ve, Place Marcelin Berthelot. Coll. de France, Lab. d'Histophysiol. * BENOIT, J. Prof. Lab. de Morphol. exper. et Endo- crinol. COURRIER, R. (no data over some years) 1 1 0 France Lab. d'Embryogenie comp. FAURE-FReMIET, E. Prof., Dir. DEVILLERS, Ch. Sous-Dir. DEROUX. G. FRANgOIS, Y. GIRAUD, Miss D. (no data on Nov. 1^'. 1952) Paris Ve, 61 Rue de Buffon, Museum Nat. de Paris, Lab. de Zool. FACE, L. Dir. VACHON, M. Asst (no data over some years) Paris Ve, 13 Rue Pierre Curie, Inst, de Biol. Physicochim. * LALLIER, R. A. Paris Ve, 7 Rue Cuvier, Univ. de Paris, Fac. des Sci., Lab. de Biol. anim. du P.C.B. * JOST, A. D. Prof. DANYSZ, Miss P. PICON, L. Paris Ve, 12 Rue Cuvier, Univ. de Paris, Fac. des Sci., Lab, de Biol, anim. (P.C.B. section II) * GALLIEN, L. Prof., Dir. du serv. HOUILLON, Ch. Asst DUPRE— MUGARD, Mrs H. Asste BEETSCHEN, J. CI. Asst LEFfiBVRE, A. LAMBINET. Miss CI. MITANCHEZ, Miss F. MAYEUR, Miss Ir. GODET, R. Paris Ve, 26 Rue d'Ulm, Inst, du Radium. Lab. d'Embryol. du Lab. Pasteur RAYNAUD, A. Chef du Lab. FRILLEY. M. Chercheur et Physicien (no data over some years) Paris Vie. 15 Rue Ecole de Med., Fac. de Med., Lab. d'Embryol. * GIROUD, A. Prof., Dir. * DESCLAUX. P. Prof. agr. * LEFEBVRES-BOISSELOT, Mrs. J. France * LELIfiVRE. A. Anc. Chef de Trav. * TEYSSEYRE, Miss J. * MORLON, Miss C. * LEVY. Mrs C. Lab. des Travaux Anat. * DELMAS, A. Pr.Agr.. Dir. * EYRIES, Ch. * BISS. R. Paris Vie, 105 Boulevard Raspail, Fac. des Sci. de Paris, Lab. d'evo- lution des etres organises GRASSfi, P. P. Dir. * MIALHE. P. Asst * GONTCHAROFF, Miss M. * LECAMP. P. Paris Xllle, III Rue L. M. Nord- mann, Univ. Hopital Broca, Ecole des Hautes Etudes, Lab. d'Hormonol. et Cytol. exper. * MORICARD. R. GOTHIfi, Miss S. CARTIER. R. GUILLON, G. Poitiers, Vienne, Fac. des Sci., Lab. de Zool. * LARAMBERGUE, M. de Prof. * LEGRAND, J.-J. Prof. Strasbourg, 1 Place de I'Hopital, Fac. de Med., Inst. d'Embryol. * VINTEMBERGER. P. Prof., Dir. * CLAVERT. J. Maitre de Confer. * ASSENMACHER. J. Asst * ZAHND, J. P. Asst Strasbourg, 12 Rue de I'Universite, Fac. des Sci., Inst, de Zool. et de Biol. Gen., Lab. de Zool.; et Lab. d'Embryol. et Teratol. exper. du C.N.R.S. * WOLFF, Et. C. Prof., Dir. * STfiPHAN-DUBOIS. Mrs Fr. Chef de Trav. * STePHAN, Fr. Chef de Trav. * SALZGEBER, Miss B. Attach, de Rech. * LUTZ— OSTERTAG. Mrs Y. Attach, de Rech. * PFLEGER. Miss D. Attach, de Rech. 1 1 1 Germany * WEY— SCHUfi, Mrs M. Attach, de Rech. " HAFFEN. Miss K. Attach, de Rech. * WOLFF, Mrs Em. Cherch. hbre * LENDER, Th. Cherch. libre * STRUDEL. G. Cherch. libre * REINBOLD. R. Cherch. libre * SYREN. J. Cherch. libre * LEPORI. N. G. (Pisa) * SENGEL. Ph. J. Asst * KIENY, Miss M. A. Stag, de Rech. Lab. de Biol. Gener. * BOUNOURE, L. Prof., Dir. * SIGOT, A. Chef de Trav. * AUBRY, Miss R. Stag, de Rech. Talence (Gironde), 40 Rue Lamar- tine, Fac. des Sci. de I'Univ. de Bordeaux, Lab. de Zool. et Physiol, anim. AVEL. M. Prof., Dir. * CAMBAR, R. Maitre de Confer, de Biol. Gener. * HAGET, A. Chef de Trav. de Biol. anim. Toulouse, Ecole Nat. Veter. * BENOIT, J. A. A. Ville d'Avray (Seine & Oise), 29 Rue Pradier * ROSTAND. J. GERMANY Frankfurt 'Main Sud, Ludwig Rhen- str. 14, Med. Fak. der Univ. Frank- furt'Main, Dr Senckenbergisches Anat. Inst. * STARCK, D. Prof., Dir. * FRICK, H. Asst * SCHNEIDER. R. Freiburg i. Brsg., Katharinenstr. 20, Naturwiss. Mathem. Fak., Zool. Inst, der Univ. Freiburg KOEHLER, O. Prof., Dir. * LODTKE, H. Wiss. Asst * SCHNETTER, M. Wiss. Asst * STARK. O. J. Wiss. Asst Gottingcn, Burgstr. 51, Med. Fak., Anat. Inst, der Univ. Gottingen * BLECHSCHMIDT, E. Prof., Dir. Germany BACHMANN. R. Prosektor, Abt. leiter f. Histol. * GRAUMANN, W. Asst Gottingen, Nikolausbergerweg 75, Mathem. Naturwiss. Fak., Zool. Inst, der Univ. Gottingen * HENKE, K. Prof., Dir. * PIEPHO, H. Ob. Asst * ULRICH, H. Wiss. Asst Hamburg 20, Schottmiillerstr. 1, Med. Fak., Anat. Inst, der Univ. Hamburg ZEIGER. K. Dir. * BAUTZMANN. H. 1 Prosektor Heiligenberg (17b). Kreis Ueber- lingen Bodensee, Heiligenberg Inst. * MANGOLD. O. Prof., Abt. leiter * WOELLWARTH, C. von Asst * WAECHTER, Miss H. Asst * TESTA. I. (Roma) Koln-Lindenthal, Kerpenerstr. 13, Zool. Inst, der Univ. * KUHN, O. Prof.. Dir. * HARTWIG. H. Asst Dozent * ENGLANDER, H. Asst * ANTON, H. J. Asst * VAHS, W. Asst * JOHNEN, Miss A. G. Asst Koln'Riehl, Amsterdamerstr. 36, Inst. f. Entw. physiol. der Univ. * QUERNER, H. Marburg Lahn, Robert Kochstr. 6, Anat. Inst, der Univ. BENNINGHOFF, A. Dir. * ROLLHAUSER. H. Asst (Dozent) * WENDT. G. G. Asst * OKStHE, A. A. Guestworker * ROLLHAUSER— ter HORST, Mfs J. Guestworker * NIESSING, K. ProL Marburg Lahn, Zool. Inst, der Univ. LUTHER. W. Prof., Dir. (no data over some years) Mariensee, Kreis Neustadt a. Rijbenberge (20a), Max-Planck- Inst. f. Tierzucht und Tierernah- rung, Abt. f. Entw. Physiol. * SEIDEL. F. Prof., Abt.-leiter Miinster, Westf.. Rob. Kochstr. 31, 112 Italy Zool. Inst, der Westf. Landes-Univ. HARDE, Asst (no data over some years) Neustadt, Schwarzwald, Hirnforsch. Inst. VOGT, Miss. M. (present address: Pasadena 4, Cahf.. U.S.A., Inst, of Technol., Dept of Biol.) Stuttgart-Hohenhcim, Zool. Inst. d. Landwirtschaftl. Hochschule * PFLUGFELDER. O. ProL, Dir. Tubingen, Wiirttemberg, Spemann- strasse 34, Max Planck-Irrst. fiir Biol. * KOHN. A. Prof.. Dir. * SCHWARTZ. V. * LEHN. H. REHM. Miss Wilhelmshaven, Max Planck-Inst. * STICH. H. Wilhelmshaven, Anton Dohrnweg. Max-Planck-Inst. fiir Meeresbiol., Abt. Fischereibiol. * HARDER. W. Wiirzburg, Rontgenring 10. Univ. Wurzburg. Naturwiss. Fak.. Zool. Inst. t PENNERS, A. Prof.. Inst. Vorstand * HUBL, H. Asst Inst, fiir Angew. Zool. * GoSZWALD. K. Prof.. Inst. Vorstand * KLOFT. W. Asst * BIER. K. ITALY Bologna (103), Via Belmeloro 8, Fac. di Sci.. 1st. di Anat. comp. * PASQUINI. P. ProL, Dir. " RAUNICH. L. Asst * LEGHISSA. S. Asst * ROSSINI. Miss M. C. Techn. * DE CESARE. Miss I. Asst * MANARESI, Miss A. Guest Asst * CENACCHI, Miss M. Guest Asst Fac. di Med., 1st. di Istol. e Fisiol. gen OLIVO, O. M. Prof., Dir. Italy 113 Italy RONDININI. R. Aiuto RIZZOLI. C. Asst (no data on Nov. 1**, 1952) Cagliari, Viale B. Bartolomeo 1 , Fac. di Sci., 1st. di Zool. STEFANELLI, A. Prof., Dir. THERMES, G. Asst BAFFONI. G. M. Asst (no data on Nov. 1^', 1952) Catania (208). Via Androne 25. 1st. di Zool. e Anat. comp. dell'LIniv. MONTEROSSO, B. Prof. ord.. Dir. PATANE', L. Aiuto (no data on Nov. 1^', 1952) Geneva, Univ. di Genova. 1st. di Anat. e Fisiol. comp. REMOTTI, E. Prof.. Dir. (no data over some years) 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. * SCHREIBER. B. Asst * ORLANDI. Miss A. Asst * CIGADA. Miss M. Asst * LEONE, V. Asst * AROSIO, G. Asst * TOSI. Miss L. Asst * CITTERIO, P. Milano, Via Mangiagalli 31, Fac. di Med. e Chir. dell'Univ. di Milano. 1st. di Anat. umana norm. BRUNI. A. C. Dir. * PRETO PARVIS. Mrs V. Asst Prof. Inc. Histol. and Gen. Embr. RONCORONI. G. Asst Modena, Via Universita 4. Fac. di Sci., 1st. di Zool. e Anat. comp. * VANNINI. E. Prof., Dir. BALLI. A. Chief Asst RANZOLI. F. Asst BELLANCA. Miss A. Asst Napoli, Via Mezzocannone 8. Fac. di Sci., Univ. di Napoli, 1st. di Genet. MONTALENTI, G. Prof. VITAGLIANO. G. Asst * DE NICOLA, Miss M. BATTAGLIA. B. Res. Asst CHIEFFI. G. Res. Asst Napoli, Zoological Station DOHRN. R. Dir. Zoology: BACCI, G. Prof. BATTAGLIA. B. Physiol. 6 Biochemistry: BOERI. E. Prof. GHIRETTI. F. * DOHRN. P. * MONTEFOSCHI. Miss S. Padova, Via Loredan 6. Fac. di Sci., 1st. di Zool. e Anat. comp. * D'ANCONA. U. Prof.. Dir. * COLOMBO. G. Asst * SABBADIN. A. Asst MARCUZZI. G. Lect. DOIMI, Miss A. M. Asst Palermo, Via Archirafi 18. 1st. di Zool. * REVERBERI. G. Prof.. Dir. * MINGANTI. A. Asst * ORTOLANI. Miss G. Asst Guest-workers: * FARINELLA— FERRUZZA, Mrs N. * PASSALACQUA. Miss A. * MANCUSO. V. * MALTESE. Miss C. * DURANTE, Miss M. Palermo, Univ. di Palermo, 1st. di Anat. comp. * MONROY. A. Prof.. Dir. SCARANO, E. Asst TOSI, Miss L. Visit. Invest. Perugia, S. Pietro, Fac. di Med., 1st. di Biol. gen. * SPIRITO, A. Prof.. Dir. * PITOTTI, Mrs M. CASTIGLI— Aiuto * BONDI. C. Asst * CENTAMORI, M. Asst * NICOLETTI, B. Ass.ff. Pisa, Via A. Volta 4, Fac. di Sci.. 1st. di Zool. e Anat. comp. dell'Univ. * BENAZZI, M. Prof.. Dir. * PARDI, L. Asst Italy * LEPORI, N. G. Asst * PAPI, F. Asst * BENAZZI— LENTATI, Mrs G. Roma. Via Borelli 50. Fac. di Sci., 1st. di Anat, comp. deH'Univ. di Roma COTRONEl G. Prof., Dir. PERRI. T. Prof., Asst * URBANI, E. Prof., Asst URBANI— MISTRUZZI, Mrs L. 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, Fac. of Med., Inst, of human Anat. LORETI, F. Dir. * AMPRINO, R. M. Prof., Aiuto * FILOGAMO, G. Asst * VIGLIANI, F. Asst FRANCESCHINI, M. Asst * LEVI, G. L. Prof. (Emer.), Anc. Dir. * GODINA, G. Prof., Guest-worker Torino, Via Giovanni Giolitti 34, Inst, of Comp. Anat. CORTI. A. Dir. * GUARDABASSI, Miss A. Asst * SACERDOTE. Miss M. Coadiutr. teen. NETHERLANDS (Holland) Amsterdam Z, de Lairessestr. 174, Free Calvinistic Univ., Zool. Inst. * LEVER, J. Prof. Amsterdam Z, Pr. Hendriklaan 27, Anat.-Embryol. Lab. LANGMAN, J. Amsterdam O, Mauritskade 61, Municipal Univ. of Amsterdam, Fac. of Med., Anat.-Embryol. Inst. * WOERDEMAN, M. W. Prof., Dir. * TRAMPUSCH, H. A. L. Chief Asst, Lect. * GATE, G. ten Chief Asst * ZUIDWEG, M. H. J. Amsterdam, Plantage Doklaan 44, 114 Netherlands Municipal Univ. of Amsterdam, Zool. Lab. * SLIJPER, E. J. Prof., Dir. Delft, Mijnbouwstraat 16a, Vezel Inst. T.N.O. * ISINGS. J. Groningcn, Oostersingel 69, Univ. of Groningen, Fac. of Med., Dept of Anat. and Embryol. * ARIENS KAPPERS. J. Prof., Dir. * BIJTEL. Miss J. H. Lect. * MOLL, J. Prosector * LANGEVOORT, H. L. Chief Asst * PROP, N. Asst * DUYKER— de BEER, Mrs A. S. Asst * BLOKZIJL. E. J. Asst SCHOKKER. R. C. Asst Groningen, Reitemakersrijge, Zool. Lab. of the Univ. of Groningen BAERENDS, G. P., Dir. BAERENDS— van ROON, Mrs J. M. (no embryol. work in progress) Leiden, Wassenaarseweg, Boer- haavekwartier, Univ. of Leyden^ Fac. of Med., Anat.-Embryol. Lab. DANKMEIJER, J. Prof., Dir. COLLISTER, Miss R. M. Prosector ELSHOUT, Miss A. M. Prosector WEL, W. H. V. d. Asst KERKHOF, Miss A. M. Oud Prosector DEKKER, Miss A. Oud Asst BOUR, J. W. H. Oud Asst LUYENDIJK, W. Oud Asst BAX, W. A. Oud Asst HEYN, C. B. Oud Asst SNELLEN, H. A. (no data on Nov. 1^', 1952) Lab. for Exper. Histol. * GAILLARD, P. J. Prof., Dir. * ZAAIJER, Miss J. J. P. Conservator * HOGEWONING, C. H. Asst * OORT, J. Asst Netherlands 115 Poland Utrecht, Bikstr. 172, State Univ. of Utrecht, Vet. Fac, Vet.-Anat. Inst. t KREDIET, G. Prof., Dir. BRUINS. J. (no data over some years) Utrecht, Janskerkhof 2, Hubrecht Lab., Internat. Embryol. Inst. * RAVEN. Chr. P. Prof., Dir. * NIEUWKOOP. P. D. Adj. Dir. * FABER I. Asst " BOTERENBROOD, Miss E. C. Asst * HOESSELS, Miss E. L. M. J. Asst * EGMOND, Miss M. T. C. van Asst * EYAL— GILADI, Mrs H. (Jerusalem) Guest-worker Utrecht, Janskerkhof 3, State Univ. of Utrecht, Fac. of Sci., Zool. Lab. * RAVEN, Chr. P. Prof., Dir. * BRETSCHNEIDER, L. H. Lect. * KAMER, J. C. V. d. Asst in Chief * BEZEM, J. J. Asst * ELBERS, P. F. Asst Guest-workers, students: * ARKEL, G. A. van * BOSSCHAERT, D. * BRAAT, Miss C. H. M. * DONGEN, A. van * DORP VAN VLIET. N. O. van * ESCH, G. J. van * FLORSCHOTZ-de WAARD, Mrs J. * GEELEN, Miss J. F. M. * HAIJE, Miss S. C. A. * HEYNINGEN. Miss H. E. van * LYESEN. Miss. A. H. * NICOLAI. J. H. W. * PARIS, Miss A. J. * RIJCKEVORSEL, F. van * SCHUURMANS, A. J. * UTRECHT, W. van * VERHAGEN. Th. G. M. * VISSCHEDIJK, A. H. J. * VRIES, Miss L. G. de Utrecht, Janskerkhof 3, State Univ. of Utrecht, Med. Fac, Anat. -Embryol. Lab. MIJSBERG, W. A. Prof., Dir. HUIZINGA, J. Chief Asst * EDGAR. G. W. F. Chief Asst * BROERS, C. J. Asst LAARMAN, J. Asst * LIMBORGH, J. van Asst Utrecht, Stationsstr. 9, State Univ. of Utrecht, Genet. Inst. RUMKE, 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, Zool. Lab. RUUD, Miss G. (no data on Nov. 1*', 1952) N. WALES (Vid. UNITED KINGDOM) POLAND (Polska) Gdansk, Med. Acad., Inst, of Histol. and Embryol. MILLER, S. Dir. WSZELACZYnSKA, M. GODLEWSKI, H. Assoc. Asst KRAHELSKA, J. Asst KROTKIEWICZ, T. PIOTROWSKA, J. WISKONT, H. (no data over some years) Krakow, sw. Anny 6, Zaklad Anat. Porownawczej U.J. im H. Hoyera * GRODZInSKI, Z. Prof., Head of Inst. * MARCHLEWSKI, J. Asst BYCZKOWSKA, W. Krakow, St Anne 6, Jagellonian Univ., Fac. of Sci.. Zool. Dept * SMRECZYnSKI, S. Head of Dept * CZAPIK, Miss A. Asst * WEGLARSKA, Miss B. Asst * ZAbWILICHOWSKA. Miss K. Asst Lodf, Narutowicza 60. Acad, of Med., Inst, of Histol. & Embryol. * BAGInSKI, S. Prof.. Dir. LEWInSKA, H. Lect. Poland 116 HAJDUKIEWICZ. J. Lect. • MICKIEWICZ. Miss Z. • RO^EWSKA. Miss J. W. • RUDEWICZ. Mrs Cz. Lodr, Nowotki 137. Med. Acad, of Lodz. Fac. of Med.. Dept of Endocr. BER. A. Prof.. Dir. (no embryol. work in progress) Poznari, ul. Sciecickiego 6. Fac. de Med. de I'Acad. de Med. a Poznan. Inst. d'Histol. et d'Embryol. KLIRKIEWICZ. T. Prof.. Dir. MIETKIEWSKI. C. Docent (no data on Nov. l^^ 1952) Poznari, Polna 33, Klinika Ginekoloqiczna Poznari HOWORKA. E. (no data on Nov. \^\ 1952) Szczecin, The Acad, of Med. SLOTWINSKI. J. Prof. (no data over some years) Toruri. Sienkiewicza 30, Uniw. M. Kopernika, Zaktad Anat. Porow- nawczej i Embriol. SZARSKI. H. Dir. STRAWIxSKI. S. Asst (no data over some years) Warszawa, ul. Chatubiriskiego 5, Acad, of Med., Inst, of Histol. and Embrvol. ZWEIBAUM. J. Dir. * KRAInSKA. Mrs M. K. * KONOPACKA. Mrs B. Wroclaw, ul. Chalubinskiego 6a. Akad. Medycznej. Zaklad Histol. i Embrvol. SEMBRATOWA. Mrs Z. Prof.. Dir. (no data on Nov. 1^'. 1952) Wroclaw, ul. Sienkiewicza 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 ' TYMOSZCZUKOWNA. Miss A. Asst Zaklad Zool. Ogolnej SEMBRAT, K. Prof., Dir. RADECKA. Mrs E. Asst Sweden PASCHMA. M. Asst STRUCHLY. Z. Adj. (no data on Nov. 1^', 1952) PORTUGAL Lisboa, Fac. de Med., Inst, de Histol. e Embriol. CELESTINO DA COSTA. A. Prof.. Dir. (no data over some years) Lisboa, Univ. de Lisboa, Museu e Lab. Zool. d. Fac. d. Ciencias * FONSECA SACARRAO, G. da SCOTLAND (Vid. UNITED KINGDOM) SPAIN Cadiz, Fac. de Med.. Lab. de Anat. v Embriol. * CRTS LLORCA, F. Prof.. Dir. SWEDEN Lund, Biskopsgatan 7, Tornblad Inst, of comp. Embryol. * GLIMSTEDT. G. Prof., Dir. ' KALLeN, B. Docent and Amanuensis * HAKANSSON. R. Amanuensis Guest-workers: * BENGMARK, S. ^ BERGQUIST. H. * HALL. P. ' HUGOSSON. R. * KRABBE. K. H. * LINDSKOG, B. WEDIN, B. Lund, Zool. Inst, of the Univ. of Lund. Embryol. Dept GISLeN. T. R. E. Prof. * WEDIN. B. Docent WINGSTRAND, K. G. * DIDING. S. Amanuensis * AKESSON, B. Stockholm, 116 Drottninggatan. Univ. of Stockholm, Zootom. Inst. * HOLMGREN, N. F. Prof. (Emer.), Anc. Dir. * PEHRSON, G. T. Prof., Dir. * SILeN. L. K. p. Prosector * JOHNELS, A. G. Docent * OLSSON, R. Asst Sweden 117 Switserland * KINDAHL. Miss M. E. Guest-worker * GUSTAFSSON, G. S. Stockholm, 16 Norrtullsgatan, Fac. of Sci. and Mathem., Wenner-Grens Inst, of cxper. Biol. * RUNNSTROM. J. A. M. Prof., Dir. * LINDBERG. N.O.H. Assoc. Prof. * BOREI, H. Assoc. Prof. * KRISZAT, G. * PERLMANN. H. P. Asst * BACKSTR5M, S. Asst * GUSTAFSON. T. Asst * HULTIN. J. M. T. Asst * HAGSTROM. B. * IMMERS. J. Asst * VASSEUR. E. J. E. Asst * WICKLUND, Miss E. Asst LYBING. S. Res. Asst Stockholm 50. Statens veter. med. anstalt. Experimentalfaltet * MONNfi, L. M. W. A. Prof. Stockholm 60, Solnavagen 1. Karo- linska Inst., Histol. Inst., Embryol. Dept HAGGQVIST, G. Prof., Dir. GYLLENSTEN. L. J. W. Asst LUNDBORG. H. A. (no data on Nov. l^*. 1952) Uppsala, Univ. Uppsala, Anat. Inst. * HOLMDAHL, D. E. Prof.. Dir. Zool. Inst. * HORSTADIUS, S. Prof., Dir. * JAGERSTEN, K. G. M. Prof. * HOLM, K. A. Docent (Curator of the Museum) * NYHOLM. K. G. Docent Uppsala, Villavagen 9. Fac. of Mat. -Nat. Sci., Inst, for Zoophys. * LINDAHL, P. E. Prof., Dir. * SWEDMARK, B. G. * KIESSLING. K.-H. * KIHLSTROM, J.-E. * THORSSELL, Miss G. SWITSERLAND Basel, Rheinsprung 9, Zool. Anstalt der Univ. PORTMANN, A. Prof., Dir. GEIGY, R. Prof. NOESCH, H. * LOSCHER. M. Basel, Socinstr. 57, Tropeninst. GEIGY. R. Prof.. Dir. (no data on Nov. 1»«. 1952) Bern, Buhlstr. 26, Med. Fak.. Univ. Bern, Anat. Inst. * HINTZSCHE. E. Prof.. Dir. BLUNTSCHLI, H. Prof. (Emer.), Kust. * STRAUSS, F. Pros. Bern, Sahlistr. 8, Philosoph. Fak., Zool. Inst, der Univ. Bern * BALTZER. F. Prof.. Dir. * ROSIN. S. Asst TSCHUMI. P. Asst * NEF. W. * HENZEN. W. * EYMANN. H. Abt. fiir Zoophysiol. * LEHMANN. F. E. Prof., Dir. * WEBER. R. Asst * BRETSCHER, A. * TARDENT, P. TSCHUMI, P. Bern, Waldau, Med. Fak., Hirnanat. Inst, der psychiatr. Univ.- * GRONTHAL. E. Dir. klinik * FEREMUTSCH, K. Asst * HEIMANN. H. Asst Biiren a. A.. Kant. Bern, Solothurn- strasse ROETHELI, A. (no embryol. work in progress) Fribourg, Inst, de Zool. * KALIN. J. Prof. Geneve, Rue de Candolle, Univ. de Geneve, Inst, de Zool. et Anat. comp. GYfiNOT. E. Dir. (no data over some years) Geneve, 20 Rue Ecole de Med., Inst. d'Anat., Lab. de Neurohistol. BAUMANN. J. A. Prof., Dir. WEBER, A. Dir. du Lab. de Neurohistol. MICHELI, A. NEIGER. M. (no data over some years) Switserland Lausanne, Fac. de Med.. Inst. d'Histol. et d'Embryol. * GALLERA. J. Zurich 6. Kiinstlergasse 16, Univ. Ziirich, Naturwiss. Fak., Zool.-vergl. Anat. Inst. HADORN. E. Prof.. Dir. STEINER, H. Prof. GLOOR. H. Instr. ANDERS, G. ANDRES, G. BUCHER. N. KOCHER. W. (no data on Nov. 1^*, 1952) Zurich 32, Gloriastr. 19. Univ. Ziirich, Med. Fak., Anat. Inst. * TONDURY. G. Prof.. Dir. * THEILER. K. Asst * SCHENK, R. Asst UNITED KINGDOM (U.K.) England Ashford, Kent, Univ. of London. Wye Coll. * FROUD. M. D. Birmingham 15, Edgbaston, Bir- mingham Univ., The Med. School, Dept of Anat. * ZUCKERMAN, S. Prof.. Dir. * BRANDT, W. Lect. * GREEN, S. H. Lect. * MANDL, Miss A. M. Asst * EAYRS. J. T. Bristol, Univ. of Bristol, Dept of Zool. (no embryol. work in progress) Cambridge, Downing St., Dept of Zool. * GOODHART, C. B. Cambridge, Gonville and Cains Coll. NEEDHAM, J. (no data received) Cambridge, Strangeways Res. Lab. * FELL, Miss H. * CHEN, J. M. * RINALDINI. L. M. Liverpool, Univ. of Liverpool. Dept of Anat. * HARRISON. R. G. Prof. * ADAMS. D. J. 118 United Kingdom (England) * MACMILLAN, E. W. London E. 1, Mile End Road. Queen Mary Coll.. Dept of Zool. SMITH. J. E. NEWELL. G. E. Reader FORREST, J. E. Sen. Lect. DIXEY, L. R. Lect. CHAPMAN. G. Lect. CARTHY. J. D. Lect. * UPTON. Miss B. C. London E. 1. Turner Str., Univ. of London. London Hosp. Med. Coll., Anat. Dept BOYD. J. D. Prof.. Dir. * HARRISON. R. J. Head of Dept BELLAIRS. A. d'A. Lect. PEACOCK. A. Lect. SOUTHWOOD. W. F. W. Lect. YULE. T. H. B. Lect. TOMLINSON, T. D. W. Demonstr. London S.E. 1. Guy's Hosp.. Med. School. Biol. Dept * BAXTER. E. W. London W. 1, Middlesex Hosp.. Med. School WOODGER. J. H. Prof.. Dir. (no embryol. work in progress) London W. 2. Norfolk Place. Paddington. St. Mary's Hosp., Med. School FISK. A. (no data on Nov. 1^*, 1952) London N.W. 1. Regent's Park. Bedford Coll.. Dept of Zool. * INGE. Miss F. E. London S.W. 1, Horsferry Rd, Westminster Med. School * O'CONNOR, R. J. London W.C. 1. Gower Str., Univ. Coll. London, Dept of Embryol. * HILL, J. P. Prof. (Emer.) * ABERCROMBIE, M. Reader * BELLAIRS— MORGAN, Mrs M. R. Asst Lect. * HEAYSMAN, Miss J. E. M. * SANTLER, Miss J. E. * AHSAN-UL-ISLAM U. K. (England) Dept of Genet. * GRONEBERG, H. Reader * TRUSLOVE. Miss G. M. Dept of Zool. and Comp. Anat. * MEDAWAR. P. B. Jodrell Prof.. Dir. * NEWTH. D. R. Lect. * BILLINGHAM, R. E. Hon. Res. Asst * FOX, H. Hon. Res. Asst London W.C. 1, 8 Hunter Str., Brunswick Square, The Roy. Free Hosp. School of Med. * THOMASON. Miss D. 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. RING, P. A. Asst Lect. . ROBINSON, Miss J. M. BROWN, D. Asst Lect. London W.C. 2, Strand, King's Coll. * MANTON, S. M. * TRIBE. Miss M. Med. Res. Council, Biophysics Res. Unit RANDALL, J. J. Hon. Dir. HANSON, Miss E. J. Member M.R.C. staff MARTIN, Miss A. V. W. Member M.R.C. staff WALKER, P. M. B. Member M.R.C. staff DAVIES, H. G. Member M.R.C. staff BOVEY. R. Member Agricult. Res. Council BAYLEY. S. T. (no data over some years) Dept of Zool. * ALLANSON, Miss M. Oxford, The Univ. Museum. Dept of Zool. and comp. Anat. * NEEDHAM, A. E. * FISCHBERG, M. Wilfred Jen- kinson Mem. Lect. 119 U. K. (Scotland) Reading, Berkshire. Univ. Dept of Zool. * EALES. Miss N. B. Sheffield, Univ. of Sheffield, Fac. of Med., Dept of Anat. * DAVIES, F. Prof. * HAINES. R. W. Sr Lect. * KING, T. S. Lect. * JOHNSON, F. R. Lect. Dept of Zool. EASTHAM. L. E. S. Prof. * FRANCIS, E. T. B. Sr Lect. Wray Castle (near Ambleside), Cumberland, Fresh-water Research Lab. N. W a 1 c s Bangor, Caernarvonshire, Univ. Coll. of N. Wales, Dept of Zool. * BRAMBELL, F. W. R. Prof., Dir. * HEMMINGS, W. A. Res. * HENDERSON, Miss M. Lect. * BURDON-JONES. C. Lect. Marine Biol. Stat. * KNIGHT-JONES. E. W. * CRISP, D. J. Scotland Edinburgh 9, West Mains Road, King's Buildings, Inst, of Anim. Genet, & Univ. Dept of Genet. * WADDINGTON, C. H. Prof., Dir. a) Univ. Dept. * CLAYTON, Mrs R. M. Lect. * COUNCE, Miss S. J. Ph. D. student * EDE, D. A. Ph. D. student * SELMAN. G. G. Asst Lect. * EL SHATOURY, H. Ph. D. student b) ARC Staff, seconded to Univ. Dept * BEATTY, R. A. Pr. Sci. Officer * DEUCHAR, Miss E. M. Sci. Officer * REEVE, E. C. R. Sr Sci. Off. * ROBERTSON, F. W. Sr Sci. Officer U. K. (Scotland) c) Med. Res. Council * CARTER. T. C. M.R.C. Sci. Staff * LYON, Miss M. F. M.R.C. Sci. Staff * PHILLIPS, Miss R. J. S. M.R.C. Sci. Staff Univ. Dept of Zool. RITCHIE, J. Prof., Dir. * JONES, B. M. Lect. * TUFT, P. H. Lect. * HALE, L. J. Lect. * KILLE, R. A. Lect. * WALLACE, D. R. J. Res. Stud. * PARNELL, I. W. 1 20 Yougoslavia * RAMULT, M. Res. Worker * SANDISON, Miss E. E. Glasgow, W. 2, The University, Dept of Genet. * CLEAT, N. D. St Andrews, Fife, The Univ., Dept of Zool. * CALLAN, H. G. Prof. Gatty Marine Lab. DODD, J. M. (no data on Nov. 1^*, 1952) YOUGOSLAVIA Zagreb, Salata, Inst, de Biol., Fac. de Med. * SKREB, N. Asst 121 LIST OF SUBJECTS witn Names or Investigators (kiranged accoraini; to organ •yitens and (ysteniatic groapa) 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 SYSTEMATIC GROUPS AND SPECIAL ORGAN-SYSTEMS (to be used for all rubrics) Systematical subdivision EV Evertcbrata 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 Vcrtcbrata 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 2 Nervous system a general subjects 122 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 d truncal skeleton e limbs and wings f joints Muscular system a general subjects b skeletal muscles (head, trunk and tail) c visceral muscles (head and trunk) d muscles of limbs and wings Alimentciry 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 c internal gills d lungs and larynx 123 e air-bladder 8 Heart, vascular system and blood a general subjects b heart c/d arterial and venous system e capillary system f blood 9 Coelomic cavities and cndothelia, lymphatic system and connective tissue a/b coelomic cavities and endothelia c lymphatic system d connective tissue 10 Urogenital system and sex determination a general subjects b/c kidney and urinary ducts d/e/f gonads (ovary and testis), genital tracts and accessory glands g sex determination 1 1 Endocrine glands a general subjects b hypophysis c thymus d thyroid gland e gonads f adrenals g pancreas 1. DESCRIPTIVE AND COMPARATIVE EMBRYOLOGY SUBDIVISION 1 Theoretical problems 2 Methods and technics 3 General subjects (asexual development, etc.) 4 Initial development a Primordial germ cells b Gameto-, ovo- and spermatogenesis c Maturation d Ovulation and oviposition e Activation and fertilization f Parthenogenesis g General subjects 5 Cleavage and mitosis a Cleavage b Mitosis 6 Further development o[ Invertebrates (including complete and partial — e.g. early — development) EV Evertebrata P Protista A Porifera B Coelenterata C Vermes and Onychophora, Tardigrada and Linguatulida D Arthropoda E Mollusca I. 1 124 I. 4b. F Bryozoa, Entoprocta, Brachiopoda and Hemichordata G Echinodermata H Urochordata 7 Further development of Vertebrates (including complete and partial — e.g. early — development) a General investigations 1 General subjects 2 Complete development 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 Limbs and wings 3 Tail e Development of special organ-systems (Cf. general subdivision p. 121 — 123) f Histo- and cytogenesis 8 Growth and differentiation (Invertebrates and Vertebrates) a Growth a/b Growth and differentiation b Differentiation V M M 1 Theoretical problems Baltzer, F. — c Blechschmidt, E. — d Holmgren, N. F. — a 2 Methods and technics Fibers, P. F. — a Hilleman, H. H. — n Sauser, G. — c 3 General subjects (asexual development, etc.) Bonner, J. T. — b Plants. Gallien, L. — e I Gilbert, Miss C. and Gillman. ). — d M Sauser, G. — a M 4 Initial development a Primordial germ cells Aubry, Miss R. — a J Bounoure, L. — a J Mangold, O and Stark. O. — a J b Gamcto-, ovo- and spermato- genesis Larambergue, M. de — b B Benazzi-Lentati, Mrs G. — a C Lehmann, F. E. — c C Lepori, N. G. — a C Lepori, N. G. — b C Omodeo, P. — b C Colombo, G. — c D Kiihn. A. — e D Makino, S. — h D Mulnard, }. — c D Uchida, T. — a D Lehmann, F. E. — c G Lehmann, F. E. — c H Callan, H. G. — b J Callan, H. G. — c J Hayashi, Y and Osawa, S. — b J I. 4b. 125 I. 6D. Uchida. T. — b J Wittek, Miss M. — a K Hillemann, H. H. — o L Makino, S. — h M Roosen-Runge, E. C. — a M c Maturation d Ovulation and oviposition Pardi, L. — a D Strauss, F. — a M c Activation and fertilization Benazzi, M. — a C Benazzi-Lentati, Mrs G. — a C Yamamoto, K. — b E Endo, Y. — b G Kanoh, Y. — a I Yamamoto, K. — a I Austin, C. R. and Braden. A. W. H. — a M Austin, C. R. and Braden. A. W. H. — c M £ Parthenogenesis Pardi, L. — a D Chang, M. C. — b M g General subjects Benazzi, M. — a C Lepori, N. G. — a C Lepori, N. G. — b C Papi, F. — a C Harvey, Mrs E. Browne — b G Leghissa, S. — a H Waddington, C. H.; Selman, G. G. and Yates, H. — e J 5 Cleavage and mitosis Harvey, Mrs E. Browne — b G a Cleavage Kiihn, A. — d B Bier, K. — a D Weglarska, Miss B. — a D Dan. K. — b G Castigli Pitotti, Mrs M. — I Colombo, G. — a J Austin. C. R. and Braden, A. W. H. — a M Chang, M. C. — b M Hertig, A. T. and Rock, J. — a M Hertig, A. T.; Mulligan, W. J. and Rock. J. — b M b Mitosis Makino. S. — h D Makino, S. — h M 6 Further development of Invertebrates (including complete and partial — e.g. early — development) EV Evcrtebrata P Protista Nyholm, K. G. — c A Porifera B Coelenterata Kuhn. A. — d Larambergue. M. de — a Leghissa, S. — b C Vermes and Onychophora, Tardigrada and Linguatulida Akesson, B. — a Bookhout, C. G. — a Bookhout, C. G. — b Jagersten, K. G. M. — a Manton, S. M. — a : Nyholm, K. G. — a Querner, H. — b Ramult, M. — -a Seidel, F. — b D Arthropoda Bier, K. — a Bier, K. — b Caspari, E. W. — a Castiglioni, Miss M. C. — a Cleat, N. D. — a Crisp, D. J. — a Czapik, Miss A. — a Goszwald, K. — a Henke, K. and collaborators — a Jones, B. M. — a Klott, W. — a Kloft, W. — c Legrand, J. -J. — a Legrand, J. -J. — b Legrand, J.-J. — d Liischer, M. — b Mulnard. J. — b Newby, W. W. — a Sandison, Miss E. E. — a I. 6D. 126 I. 7b. Schwartz, V. — a Seidel, F. — b Uchida, T. — a Weglarska, Miss B. — a Zacwilichowska, Miss K. — a E Mollusca Fonseca Sacarrao, G. da — a Fonseca Sacarrao, G. da — b Ince, Miss F. E. — a Tahara, Y. — a F Bryozoa, Entoprocta, Brachio- poda and Hemichordata Burdon-Jones, C. — a Colwin, A. L. and Colwin, Mrs L. H. — b Diding, S. — a Silen, L. K. P. — a G Echinodermata Colwin, Mrs L. H. — c Harvey, Mrs E. Browne — b Lallier, R. A. — d Nyholm, K. G. — b H Urochordata and Cephalo- chordata Burdon-Jones, C. — a Sabbadin, A. — b 7 Further development of Vertebrates (including complete and partial — e.g. early — development) a General investigations General subjects Battle, Mis H. I. — b I Egmond Miss M. T. C. van and Hoessels, Miss E. L. M. J. — a Horn, E. C. — a Ubisch, L. V. — a Prop, N. — a Rostand, J. — c Holmdahl, D. E. — g HV Grodzinski, Z. — c K Brandt, W. — c M Chang, M. C. — c M Eales, Miss N. B. — a M Egmond Miss M. T. C. van and Hoessels, Miss E. L. M. J. — a M Gilbert, Miss C. and Gillman, J. — d M Hertig, A. T. and Rock, J. — a M Hjelmman, G. — a M Richter, K. M. — c M Richter, K. M. — d M Seidel, F. -^a M Sinclair, L. K. P. — a M Complete development Baxter, E. W. — a I Damas, H. F, C. — a I Lever, J. — a I Sedra, Shokralla N. — a J Pasteels, J.J. — a K Boyer, C. C — b M Gilbert, Miss C. — a M Partial development Gubbay, Miss V. — a M Harrison, R. G. — c M Implantation and placentation Alden, R. H. — a M Boving, B. G. — b M Frick, H. — a M Hamilton, W. J. and Harrison, R. J. — d M Hill, J. P. — a M Hillemann, H. H. — k M Ramsey, Miss E. M. — a M Sinclair, L. K. P. — a M Strauss, F. — b M b Early development, gastru- lation, etc. Lalher, R. A. — d Nieuwkoop, P. D. — a Sinclair, L. K. P. — a Skreb, N. — a Early development Lutz, H. — a Hamilton, W. J. — c Harrison, R. J. — a Hertig, A. T.; Mulligan, W. J and Rock, J. — b Gastrulation and [ormation of germ layers Castigli Pitotti, Mrs M. — a I Development o[ foetal membranes Bautzmann, H. — c V Adamstone, F. B. — a L Alden. R. H. — a M J J M M L M M M I. 7c. 127 I. 7e. 2. c Neurulation, etc. Lallier, R. A. — d J Tribe, Miss M. — a L Neurulation (s.s.) Rhodes, S. A. — a J Development o[ neural crest Raunich. L. — d J Hill. J. P. — b L Hill. J. P. — b M First larval development Pasteels, J. J. — d I Schenk, R. — a M d Development of part of the organism Head Arkel, G. A, van — a I Huber, W. — a L King, T. S. — a M Limbs and wings Blokzijl. E. J. — a J Bretscher, A. — a L Blechschmidt, E. — b M Vigliani, F. — a M Tail Grodzinski, Z. — f I Smithberg. M. — a J Caspari, E. W. — b M e Development of special organ-systems Skin General subjects Blechschmidt. E. — a M Snook. T. — b M Teeth Greulich, R. C. and Leblond. C. P. — a V Blechschmidt, E. — e M Hilleman. H. H. — n M Kindahl. Miss M. E. — a M Williams. S. C. — b M Zaaijer, Miss J. J. P. — b M Hair Chase, H. B. — b M Isings, J. — c M Glands Cohn, S. A. — a L Glimstedt. G. and Hall, P. — a L Cohn, S. A. — a M Cohn, S. A. — b Pigment cells and patterns Faber, J. — a Chase, H. B. — b Nervous system General subjects Leghissa, S. — c Dreyer, Miss M. V. — a Central nervous system Griinthal. E. — a Grunthal. E. — a Brain Holmdahl, D. E. — h Manaresi. Miss A. — a Dongen, A. van — a Heimann, H. — a Heyningen, Miss H. E. van Kamer, J. C. v. d. — d Ollson, R. — a Schuurmans, A. J. — a Verhagen, Th. G. M. — a Ariens Kappers, J. — a Kollros, J. J, — g Bergquist, H. — a Harkmark, W. — a Harkmark W. — b Krabbe, K. H. — a Moll, J. — a Bengmark, S.; Hugosson, R. Kallen, B. — b Bergquist, H. — a Biss, R. and Eyries, Ch. — a Delmas, A. — a Desclaux, P. — a Feremutsch, K. — a Feremutsch, K. and Strauss, F. — b Giroud. A. — a Godina G. — a Graumann, W. — b Hogue, Miss M. J. — a Jansen, J. — a Jansen, J. — b Moll, J. — a Preto Parvis, Mrs V. — b Sinclair, L. K. P. — c Spina! cord Kollros. J. J. — a Sensenig. E. C. — a M J M V L L M V V and K L L L L M M M M M M M M M M M M M M M M J M I. 7e. 2. Accessory organs Paraphysis , , ^ o Duyker-De Beer, Mrs A. b. — a Langevoort, H. L. — a Pineal body Esch, G. J. van — a Kamer. J. C. v. d. — a Kamer, J. C. v. d. — b Kamer, J. C. v. d. — a Hypophysis Oort, J. — a Ganglia Niessing, K. — a Masy, Miss S. — b Nerves Cephalic nerves Raven, Chr. P. — a Campenhout, E. van — e Biss, R. and Eyries, Ch. — a Biss, R. and Eyries, Ch. — b Humphrey, Miss T. — a King, T. S. — a Spinal nerves Kollros, J. J. — a Campenhout, E. van — ^c Snook, T. — c Para- and sympathetic and intramural nervous system Campenhout, E. van — d Campenhout, E. van — a Filogamo, G. — a Meninges Langevoort, H. L. — b Special sense organs Eye Bijtel, Miss J. H. — d Rhodes, S. A. — a Rhodes, S. A. — b Bartelmez, G. W. — b Ear Bijtel. Miss J. H. — c Kamer, J. C. v. d. — c Biss, R. and Eyries, Ch. — b Hillemann, H. H. — c Lyon, Miss M. F. — a Lateral sense organs Kille. R. A. — a Kille, R. A. — b 128 L 7e. 4. I M J K M M M M J M M K L M L J J J M J J M M M I I Pehrson, G. T. — a 5A:e/e^on General subjects Greulich, R. C. and Leblond, C. P. — a Hale, L. J. — a Graumann, W. — a Hillemann, H. H. — b Hillemann, H. H. — n Embryonic temporary endo-skelcton Eloff, F. C — a Eloff, F. C. — b Starck, D. — a Starck, D. — b Skull Murray, P. D. F. — a Gustafson, G. S. — a Johnels, A. G. — a Kille, R. A. — a Pehrson, G. T. — a Pehrson, G. T. — b Barry, T. H. — a Pentz, Miss K. — a Westhuizen, C. M. v. d. — a Engelbrecht, D. van Z. — a Frank, G. H. — a Broers, C. J. — a Frick, H. — b Schneider, R. — a Sensenig, E. C. — c Starck, D. — a Starck, D. — b Truncal skeleton Orska, Miss }. — a Ryke, P. A. J. and Smit, A. J. — a Smit, A. L. — a Prins, F. X. — a Kalin, J. — a Sensenig, E. C. — a Vigliani, F. — a Limbs and wings Bretscher, A. — d Pletzen, R. van — a Kalin, J. — b Tymoszczukowna, Miss A. — Joints Beau, A. A. and Rabischong, J. — b Beau, A. A.; Cayotte. J. and Sommelet, J. — c V L M M M M M M M V L L M M M M M M I J J L M M M I. 7e. 4. 129 I. 7e. 10. Beau, A. A. — d M Haines, R. W. — a M Moll. J. — b M Vigliani, F. — a M Muscular system General subjects Blechschmidt, E. — g M Snook. T. — c M Skeletal muscles (head, trunk and tail) Bretscher, A. — d J Ryke. P. A. J. and Smit. A. L. — a J Muscles of limbs and wings Vigliani. F. — a M Alimentary tract General subjects Nakamura, O. — c J Tahara. Y. — c J Ford, P. — b M Mouth- and pharyngeal cavities Toivonen, S. I. — d J Tribe, Miss M. — b J Klapper, C. E. — a M Intestinal tract Harder, W. — a I Bellairs-Morgan, Mrs, M. R. — a L Filogamo, G. — a M Salivary glands Kiapper, C. E. — b M Zenker, W. J. and Halzl— a M Pancreas Donaldson, J. O. — a M Humphrey, Miss T. — b M Respitatory organs Internal gills Tribe, Miss M. — b J Lungs and larynx Beau, A. A.; Dollander. A. and Laurent, M. — a M Orts Llorca, F. — b M Air-bladder Winowska. Mrs J. — ^a I Heart, vascular system and blood General subjects Raunich, L. — a I Heart Meyer. R. de — a L Davies, F. and Francis, E. T. B. — a Latimer, H. B. — a Orts Llorca, F. — a Arterial and venous system Grodziriski, Z. — f Millard-Bokenham, Mrs N. Froud, M. D. — a Froud, M. D. — b Godina. G. — b Reynolds, S. R. M. — c Reynolds, S. R. M. — d Slijper, E. J. — a Vermaak, D. — a M M M I Coelomic cavities lymphatic system tissue Coelomic cavities and endothelia Wedin. B. — a Priesching. A. — a Lymphatic system Bautzmann, H. — b Snook, T. — a Urogenital system and sex determination Kidney and urinary ducts Szarski, K. W. — a Cambar, R. and Williaume. R. — a Glenister, T. W. — a Gonads D'Ancona, U. — a Aoto. T. — a Bounoure, L. — a Gallien, L. — a Mangold, O. and Stark, O. — a Sabbadin, A. — a Uchida, T. — b Vannini, E. — e Assenmacher, L and Benoit, J. — a Campenhout. E. van — a Allanson. Miss M. — a Corner, G. W. — a Gallien. L. — d Hamilton. W. J. and Harrison. R. J. — b Tondury. G. — c A. H. -a J L L M M M M M and endothelia, and connective V M V M LV J M I L L M M M M M I. 7e. 10. 130 I. 8b. Genital tracts Gallien, L. — a J Allanson, Miss M. — a M Corner, G. W. — a M Gallien, L. — a M Strauss, F. — a M Szarski, K. W. — b M Accessory glands Gallien, L. — a J Allanson, Miss M. — a M Bengmark, S. — a M Gallien, L. — a M Szarski, K. W. — b M Sex determination Reinbold, R. — a L Wolff. Et.; Wolff, Mrs Em.; Ham- pe. A.; Lutz-Ostertag, Mrs Y.; Pfleger, Miss D.; Salzgeber, Miss B. and Strudel, G. — b L Lindahl, P. E. — g M Thorssell, Miss G. — a M Endocrine glands General subjects Latimer, H. B. — b M Hypophysis Bartelmez, G. W. — c V Assenmacher, I. and Benoit, J. — a L Grignon, G. — a L Thyroid gland Leblond, C. P. — a V Assenmacher, I. and Benoit, J. — a L Pancreas Adams, D. J. — a M f Histo- and cytogcnesis Preto Parvis, Mrs V. — c L Rudnick, Miss D. — a L Glimstedt, G. and Hakansson, R. — b M Preto Parvis, Mrs V. — c M 8 Growth and di[[erentiation (Invertebrates and Vertebrates) a Growth Querner, H. — b C Ramult, M. — a C Cleat, N. D. — a D Legrand, J. -J. — c D Legrand, J.-J. — e D a/b Growth and differentiation Wallace, D. R. J. — a D Lehmann, F. E. and collaborators — a J Blechschmidt, E. — a M b Differentiation Hale, L. J. — a L II. EXPERIMENTAL DEVELOPMENTAL MORPHOLOGY SUBDIVISION 1 Theoretical problems 2 Methods and technics 3 General subjects (asexual development, etc.) 4 Initial development a Primordial germ cells b Gameto-, ovo- and spermatogenesis c Maturation d Ovulation and oviposition e Activation and fertilization f Parthenogenesis g General subjects 5 Cleavage and mitosis a Cleavage b Mitosis 6 Further development o[ Invertebrates a General subjects (complete development) b Topogenesis II. 1. 131 11. 4a. c Determination of primitive development d Development of part of the organism (head) e Development of special organ systems (Cf. general subdivision p. 121 — 123) f Histo- and cytogenesis 7 Further development of 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 parts of the organism 1 Head 2 Limbs and wings 3 Tail e Development of special organ systems (Cf. general subdivision p. 121 — 123) f Histo- and cytogenesis 8 Growth and differentiation (Invertebrates and Vertebrates) a Growth a/b Growth and differentiation b Differentiation CHARACTER OF INVESTIGATION (4) Physical treatment (5) Chemical treatment (6) Influence of hormones and vitamins 1 Theoretical problems Yamada, T. — a V 2 Methods and technics Beatty, R. A. — b Benoit, J. A. A. — b I Mookerjee, S. and Sanyel, S. — c J Nieuwkoop, P. D. — h L Williams, R. G. — a M 3 General subjects (asexual development, etc.) Bonner, J. T. — b Plants Kiihn, O. — c (5) Tondury. G. — h Oka, H. — b H Oka, H.-^c H Lutz, H. and Lutz-Ostertag, Mrs Y. — c I Lutz. H. — b L Sinclair, L. K. P. — b (5)M 4 Initial development a Primordial germ cells Aubry, Miss R. — a J II. 4a. 132 II. 6d. Mangold, O. and Stark, O. — a b Gameto-, ovo- and spermato- genesis Dan. Mrs J. C. — b Lehmann, F. E. — c Vannini, E. — d Dan Mrs J. C. — b Dan, Mrs J. C. — b Lehmann, F. E. — c Lehmann, F. E. — ^c Callan, H. G. — d c Maturation Moricard, R. — a d Ovulation and oviposition e Activation ann fertilization Goszwald, K. — d Cleland, K. W.— b Dan, Mrs J. C. — a Lillie, R. S. — a Kanoh, Y. and Yanagimachi, R. — b Moricard, R. — ^ b Pesonen, S. K. — b f Parthenogenesis Goszwald, K. — c Harvey, Mrs E. Browne — a Fankhauser, G. — a Fischberg, M. — ' a Shaver, J. R. — a Beatty, R. A. and Selman, G. G. — a Pesonen, S. K. — a g General subjects Gustafson, T. — b Harvey, Mrs E. Browne — b Leghissa, S. — a Ortolani, Miss G. — b Ancel, P. — b Briggs, R. W. and King, T. J. — a Ancel, P. — b Egmond, Miss M. T. C. van — b 5 Cleavage and mitosis Harvey, Mrs E. Browne — b a Cleavage Goodhart, C. B. — d c c c E G G H J M D (5)G G I M M D (4)G (4)J J J M (5)M G G H H J J L (4)M EV (4/5 ;4)EV P P B C C (6)D (5)D (5)D D D Clement, A. C. — a E Cleland, K. W. — b (5)G Goodhart, C. B. — d V Colombo. G. — b (6) J Fankhauser, G. — a (4)J Green, Mrs E. U. — a (5) J b Mitosis Dan, K. — c G 6 Further development o[ Invertebrates a General subjects (complete development) Harvey, E. B. — a Weisz. P. B. — a Weisz, P. B. — b Trampusch, H. A. L. — a Parnell, I. W. — a Trampusch, H. A. L. — a Bodenstein, D. — d Goto, T. — a Hama, T. — ^ b Legrand, J.-J. — b Sobels, F. H. — a Colwin, A. L. and Colwin Mrs L. H. — b F Dan, K. — a G Gustafson, T. — c G Harvey, Mrs E. Browne — b G b Topogenesis Kajishima, T. — a D Lindahl, P. E. — a G Moore, A. R. — a G Ortolani, Miss G. — a H c Determination of primitive development Selman, G. G. — a (4)EV Haget, A. — a D Holm, K. A. — a D Selman, G. G. — a (4)D Smreczynski, S. — a D Clement, A. C. — b E Harvey, Mrs E. Browne — a (4)G Horstadius, S. — a G Lalher, R. A. — d G Leghissa, S. — a H Urbani, E. — c H d Development of part of the organism (head) II. 6e. 133 II. 7b. e Development of special organ systems Skin Kiihn. A. — b D Kuhn, A. — c D Spinal nerves Needham, A. E. — a D Eye Castiglioni, Miss M. C. — a D Skeleton Okazaki, Miss K. — b G Intestinal tract Dorp van Vliet, N. O. van and Sobels. F. H. — a D Urogenital system and sex determination Haget. A. — b D Legrand, J. -J. — a D Urbani, E. — d D Endocrine glands Dohrn. P. — b D Liischer, M. — b D f Histo- and cytogenesis 7 Further development o[ Vertebrates a General investigations General subjects Holmdahl, D. E. — a V Rugh, Roberts — a (4)V Rugh, Roberts — b V Hama, T. — b (5)LV Harvey, E, B. — a (4)LV Battle, Miss H. I. — ^c (5)1 Fontana, J. S. — a (6)J Gallera, J. — b (3)J Goto, T. — a {5)J Holtfreter, J. K. F. — a (5)J Kemp, N. E. — b J Kemp, N, E. — c (1)J Laurent, M. — a (5)J Leone, V. — a {5)J Markert, C. L. — c (5)1 Mookerjee. S. and Waddington, C. H. — b J Okada, T. — b J Reverberi G. — a (5)J Hillemann. H. H. — 1 L Wolff. Et. — a L Beatty. R. A. — a Briones, H. — a Kallen, B. and Lindskog, B. — c Laurent, M. — a Pesonen, S. K. — a Sinclair, L. K. P. — b Smithberg, M. — a Complete development Partial development Hartwig, H. — a Implantation and placentation Bautzmann, H. — c Mather, W. B. — a b Topogenesis Battle, Miss H. I. — a Nakamura, O. — a Passalacqua, Miss A. — a Takamoto, K. — b Townes, Ph, L. — a Waddington, C. H. — a Tribe, Miss M. — ^ a Waddington, C. H. — a Chang, M. C. — a Early development De Cesare, Miss I. and Pasquini, P. — a Green, Mrs E. U. — a Lombard, G. L. — a Pasquini, P. and Raunich, L. — c Rossini, Miss, M. C. — a Gastrulation and formation of germ layers Nieuwkoop, P. D. — c Malan, Miss M. E. — a Rozewska, Miss }. W. — a Neurulation Malan, Miss M. E. — a Formation of neural crest Holmdahl, D. E. — c Newth, D. R. — a Bodenstein, D. — a Planque, B. A, de — a Saunders, J. W. — a First larval development Deuchar. Miss E. M. and Waddington, C. H. — a M M (5)M (5)M (5)M (5)M M (6)J V M (5)1 J J (5)J J J L L M (5)J (5)J (5)J (4)J (5)J J L '5)L V I J J L II. 7c. c Induction, determination, etc. Ikushima, N. — b Bautzmann, H. — a Eyal-Giladi. Mrs H.— a Kawakami, I. — a Lombard, G. L. — b Nieuwkoop, P. D. — d Takaya, H. — c Nieuwkoop, P. D. — e Nieuwkoop. P. D. — g Induction Okada. T. — c Woerdeman, M. W. — c Benoit, J. A. A. — a Bodenstein, D. — a Fontana, }. S. — c Gallera, J. — a Gallcra, J. — ^b Goodhart, C. B. — c Hayashi, Y. — a Holtfreter, J. K. F. — b Kuusi, Miss T. — a Masuda. H. — c Reyer. R. W. — a Reyer, R. W. — b Sirlin, J. L. — b Spofford, W. R. — a Tamada, T. — c Tondury, G. — f Woerdeman, M. W. — b Cairns, J. M. — a McKeehan, M. S. — a Hardy, Miss M. H. — a Toivonen, S. I. — e 134 II. 7e. 1. (5) L L V V HV L L M :5)M V I Determination Grobstein, C. — a Oppenheimer, Miss J. M. — Deuchar, Miss E. M. and Waddington, C. H. — a Driscoll. W. T. — a (5) Horstadius, S. — ^ b Lallier, R. A. — d Moore, J. A. — a Moore, }. A. — b Muchmore, W. B. — a Raunich, L. — c Reyer, R. W. — b Spofford. W. R. — a Ahsan-ul-Islam, — a L McKeehan, M. S. — b L Regulation and organization Yamada, T. — a V Balinsky, B. I. — a Dalcq, A, M. and coworkers — c Deuchar, Miss E. M. and Waddington, C. H. — b Dollander. A. and Levan Diem, P. — b Hama, T. — a Nieuwkoop, P. D. and Toivonen, S. — b Planque, B. A. de — a Selman, G. G. — a (4) d Development of parts of the organism Wey-Schue, Mrs M.— b (4)L Head Horstadius S. — b J Huber, W. — a L Limbs and wings Blokzijl, E. J. — a J Butler. E. G. — d (4) J Oka. H. — a I Bretscher. A. — b (5)L Bretscher, A. — c L Cairns, J. M. — c L Saunders, J. W. — c L Tail Bijtel. Miss J. H. — a Farinella-Ferruzza, Mrs N, — a Nakamura. O. — b Smithberg. M. — a Tahara, Y. — b e Development of special organ systems Skin General subjects Lepori. N. G. — ^ c L Rawles. Miss M. E. — c L Fraser, A. S. — a M Hardy. Miss M. H. — c M Rawles, Miss M. E. — b M Rawles. Miss M. E. — c M Teeth Zaaijer, Miss J. J. P. ^ — e M Hair Hardy, Miss M. H. — a M Hardy. Miss M. H. — c M Hardy, Miss M. H. — e M II. 7e. 1. 135 II. 7e. 4. Rawles, Miss, M. E. — b Feathers Cairns, J. M. — a Rawles, Miss M. E. — a M L L Sense organs Oksche, A. A. — b J Pigment cells and patterns Mori. Y.— a Rawles. Miss M. E. — a Dalton. H. C — a Dalton. H. C. — b Dushane, G. — b Lepori, N. G. — c L Saunders, J. W. — a L Willier, B. H.— b L Rawles, Miss M. E. — b M Nervous system General subjects Deuchar, Miss, E. M. and Waddington, C. H. — b J Spofford, W. R. — b J Hamburger, V. and Levi-Montalcini, Miss R. — -a L Hammond, W. S. — b L Sengel, Ph. J. — b L Central nervous system Grobstein, C. — a V Eakin, R. M. — a J Nieuwkoop, P. D. — d J Nieuwkoop, P. D. — e L Nieuwkoop, P. D. — g L Kallen. B. — a M Brain Oppenheimer, Miss J. M. — a I Crelin, E. S. and Stone, L. S -bj Kollros, J. J. — b J Kollros, J. J. and Pepernik, Mrs V. — e J Harkmark, W. — a L Harkmark. W. — b L Williams, S. C. — a L Spinal cord Holmdahl, D. E. — b V Littrell, J. L.; Windle, W. F. and Stuart, E. G. — b L Ganglia Spinal ganglia Dushane, G. — a J Strudel, G. — a L Nerves Holtzer, H. — b V Edds, M. V. — b M Para- and sympathetic and intramural nervous system Hammond, W.S. and Yntema, C. L. — ^ a L Para- and sympathetic nervous system Sirlin, J. L. — d Strudel, G. — a Special sense organs Kawakami, I. — a Eye Reyer, R. W. — b Syren, J. — a Eye (s.s.) Guardabassi, Miss A — a Guardabassi, Miss A. — b Amprino, R. M. — a Amprino, R. M. — b Lens Fontana, J. S. — c Sirhn, J. L. — b McKeehan, M. S. — a McKeehan, M. S. — b Ear Ichikawa, M, — b Yntema, C. L. — a Hillemann, H. H. — g Lateral sense organs Kille, R. A. — a Kille, R. A.— 'b 5^e/e^on General subjects Chen, J. M. — a Hartwig, H. — b Hale, L. J. — a Kieny, Miss M, A. — a Murray, P. D. F. — b Carpenter, Miss E. — b Griineberg, H. — a Toivonen, S. I. — e Williams, R. G. — b Zaaijer, Miss, }. J. P. — c Embryonic temporary skeleton Tondury, G. — g SkuU Kille, R. A. — a Hilleman, H. H. — g Truncal skeleton Holtzer, H. — c Masy, Miss S. — a (6)V J L L L (6)M M (5)M M M II. 7e. 5. Muscular system General subjects Herrmann, H. and Rothfels, U. — d L Skeletal muscles (head, trunk and tail) Rawles, Miss M. E. — ^ d L Muscles of limbs and wings Blokzijl, E. J. — a J Alimentary tract General subjects Kemp, N. E. — b J Okada, T. — a J Mouth and pharyngeal cavities Hamilton, H. L. — a L Intestinal tract Takaya, H. — a J Salivary glands Grobstein, C— b M Pancreas Mialhe, P.— a (5)L Respiratory organs External gills Durante, Miss M. — a J Heart, vascular system and blood General subjects Holmdahl. D. E. — d V Stephan, Fr. — a L Heart Richter. K. M. — b (5)L Stephan, Fr. — a L Arterial and venous system Stephan, Fr. — a ■ L Urogenital system and sex determination General subjects Gaillard, P. J. — a M Kidney and urinary ducts Bijtel. Miss J. H. — b J Fox, H. — a J Fox, H. — b J Haffen, Miss K. — a L Burns, R.K. — b (6)M Gonads Fankhauser, G. — b Mangold, O. and Stark, O. — Vannini, E. — b Vannini, E. — c Haffen, Miss K. and Wolff, Et. — b Limborgh, J. van — a Mintz, Miss B. — c Vannini, E. — b Burns, R.K. — b Vannini, E. — b 136 11. 7e. 11. L L (6)M M Genital tracts Lutz-Ostertag, Mrs Y. — a L Burns, R.K. — b (6)M Lipschutz, A. — ^b M Sex determination Yamamoto, T. — b I Yamamoto, T. — c I Takaya, H. — b J Wolff, Et.; Wolff, Mrs Em. and Haffen, Miss K. — d HV Limborgh, J. van — b L Mintz, Miss B. — a (6)L Pfleger, Miss D. — a (6)L Salzgeber, Miss B. — a (4/5)L Salzgeber, Miss B. — b (4)L Wolff, Mrs Em. and Wolff, Et. — a (6)L Wolff, Mrs Em.— b L Wolff. Et.; Wolff, Mrs Em.; Hampe, A; Lutz-Ostertag, Mrs Y.; Pfleger, Miss D.; Salzgeber, Miss B. and Strudel, G. — b L Burns, R. K. — a (6)M Fischberg, M. — c M Jost, A. D. — a (6)M Jost, A. D. — c M Endocrine glands Hypophysis Blount, R. F. — b J Dalton, H. C.— b J Driscoll, W. T. — a (5) J Eakin, R. M. — a J Thymus Hammond, W. S. — c L J Thyroid gland Carpenter, Miss E. — a Gaillard, P. J. — b Carpenter, Miss E. — a L L M f Histo- and cytogcncsis Fell, Miss H. B. and Mellanby, Sir E. — a Muchmore, W.B. — a Waddington, C. H. — b Levi, G. L. — a Levi, G. L. — b Abercrombie, M. — a (6)V J J HV HV L II. 7e. 11. 137 II. 8b. Abercrombie, M. and Heaysman, Miss J. E. M. — b L Carpenter, Miss E. — a L Rudewicz. Mrs Cz. — a (5)L Willier. B. H. — b L Carpenter, Miss E. — a M Grobstein, C. — b M Grobstein, C. — c M 8 Growth and differentiation (Invertebrates and Vertebrates) a GroNvth Bodenstein, D. — b (6)D Lcgrand, J. -J. — ^c D Holtzer, H. — b V Kollros, J. J. — b J Oksche, A. A. — a J Baginski, S. — -a (5)L Mickiewicz, Miss Z. — b (5)L Richter, K. M. — b (5)L Rozewska. Miss J. W. — b (5)L Rudewicz, Mrs Cz. — b (5)L Edds, M. v. — b M Williams. R. G. — a M a/b Growth and differentiation Reeve, E. C. R. and Robertson, F. W. — a D Levi. G. L. — a HV Krauss, M. M b Differentiation Schnetter, M. — a D Ivey, W. D. — a (5)E Briggs. R. W. and King, T. J. — a J Goodhart, C. B. — a J Kemp, N. E. — c (1)J Haffen. Miss K. and Wolff, Et. — b L Hale, L. J. — a L Herrmann, H. and Rothfels, U. — d L Williams, S. C. — a L 111. PHYSIOLOGY OF DEVELOPMENT SUBDIVISION 1 Theoretical problems 2 Methods and technics 3 General subjects (asexual development, etc.) 4 Initial development a Primordial germ cells b Gameto-, ovo- and spermatogenesis c Maturation d Ovulation and oviposition e Activation and fertilization f Parthenogenesis g General subjects 5 Cleavage and mitosis a Cleavage b Mitosis 6 Further development of Invertebrates a General subjects (complete development) b Primitive development (including early development) c Induction and determination d Development of part of the organism (head) e Development of special organ systems (Cf. general subdivision p. 121 — 123) f Histo- and cytochemistry g Serological and immunological studies 7 Further development of Vertebrates a General investigations III. 1. 138 III. 3. 1 General subjects 2 Complete development 3 Later development 4 Implantation and placentation b Primitive development 1 Early development 2 Gastrulation 2/3 Gastrulation and neurulation 3 Neurulation 4 Development of neural crest c Induction and determination, etc. 1 Induction 2 Determination 3 Regulation and organisation d Development of part of the organism 1 Head 2 Limbs and wings 3 Tail e Development of special organ systems (Cf. general subdivision p. 121 — 123) f Histo- and cytochemistry g Serological and immunological studies 8 Growth and diflerentiation (Invertebrates and Vertebrates) a Growth a/b Growth and differentiation b Differentiation 9 Nutrition o[ embryo (Invertebrates and Vertebrates) CHARACTER OF INVESTIGATION ( 1 ) Metabolism and respiration (2) Cytochemistry (3) Physical properties (4) Physical treatment (5) Chemical treatment (6) Influence of hormones and vitamins 1 Theoretical problems Cheney, R. H. — e (1/5) Yamada. T. — a V Kuhn, O. — a (6) Woerdeman, M. W. — b HV Bonner, J. T. — a Plants 2 Methods and technics Centamori, M. — a (2) Plants Crisp, D. J. — a D Belanger, L. F. — b Nicoletti, B. — a J Belanger, L. F. — c Hillemann, H. H. — o L Deuchar, Miss E. M. and Cheney, R. H. — c {5)M Selman, G. G. — e J Corner, G. W. — b M Marchlewski, J. H. — b L Pincus, G. — a M - ^ , , Reynolds, S. R. M. — b M 3 General subjects Young, W. C. — a M (asexual development, etc.) Young, W. C. — ■ b M III. 4a. 139 III. 4g. 4 Initial development a Primordial germ cells Katakura. Y. — a (2)D b Gameto-, ovo- and spermato- genesis Lison. L. and Pasteels, }. J. — a (2) Jaffe. L. F. — a Plants Tyler, A. — c EV Vannini, E. — a (2)EV collaborators of tPenners. A. — b (2)C collaborators of tPenners. A. — d (4/5)C Krainska. Mrs M. K. — a (2)D Montefoschi, Miss S. — (1)D Mulnard, J. — a (2)D Urbani, E. — e (2)D Urbani, E. — e (2)G Tyler. A. — c V Vannini, E. — a {2)V Callan. H. G. — c J Callan. H. G. — d J Hayashi, Y. and Osawa S. — b (2)J Hillemann, H. H. — o Bishop, D. W. — a Bishop, D. W. — b Green, S. H. — a Young, W. C. — a Harrison, R. G. — a Harrison, R. G. and MacMillan, E. W. — b Mandl, Miss A. M. — a Urbani, E. — e Zuckerman, S. — a c Maturation Grant, Ph. — a Kihlstrom, J.-E. — a Kihlstrom. |.-E. — b Lindahl, P. E. — e d Ovulation and oviposition e Activation and fertilization Kriszat, G. — a Colwin, A. L. and Colwin, Mrs L. H. — a Cleland. K. W. — a Dohrn, P. — a Endo, Y. — a Immers, J. — a Ishikawa M. and L (l)M M M (6)M (1)M (l)M M (2)M M (1)J M M M (5) F (1)G (2)G (2)G (1)G Sugiyama, M. — a Lillie, R. S. — a Lindahl. P. E. — b Merritt, Mrs J. K. and Tyler, A. — a Monroy, A. and Tosi, Miss L. — b Montefoschi, Miss S. — b Nakano, E. — c Runnstrom, J. A. M. — a Runnstrom, J. A. M. — e Tosi, Miss L. — a Tyler, A. — a Vasseur, E. J. E. — a Wicklund, Miss E. W. — Minganti, A. — b Kanoh, Y. — a Kanoh, Y, and Yanagimachi, R. — b Yamamoto, T. — a Shaver, J. R. — b Tosi, Miss L. — a Marchlewski, J. H. — a Austin, C. R. and Braden, A. W. H. — a Austin, C. R. and Braden, A. W. H. — b Chang, M. C. — a Chang, M. C. — d Kihlstrom, J.-E. — b Lindahl, P. E. — f Young, W. C. — a f Parthenogenesis Ishikawa, M. and Sugiyama, M. — a Rostand, }. — a Shaver, J. R. — a g General subjects Geelen, Miss. J. F. M. — Dohrn, P. and Monroy A. Harvey, Mrs E. Browne — Kajishima, T. — b Kiessling, K.-H. — a Kriszat, G. and Runnstrom, J. A. M. — Lindahl, P. E. — c Lindahl, P. E. — d Lindbcrg. N. O. H. — a Vasseur, E. J. E. a Durante, Miss M. — b G G (2)G (1)G G G G G G G G a (4/5)G H I I I J J L (2)M (2/3)M M M M M (6)M G (4)J J 3)E 1)G G (2)G (1)G c ( (5)G (2)G (2 (1 ► G IG G H in. 4g. Reverberi. G. — b H Barth, L. G. — a (2)J Barth, Mrs L. J. —a (1)J Dollander, A. and Labadie, Miss G. — a (3)J Dollander, A. and Melnotte, P. J. — c (3) J Kawakami, I. — b (1)J Sze, L. C — a (2) J Egmond, Miss M. T. C. van — b (2/4)M Hillemann, H. H. — h (6)M Waelsch, Mrs S. Gluecksohn — b M 5 Cleavage and mitosis Harvey, Mrs E. Browne — b G 140 III. 6a. Waelsch, Mrs S. Gluecksohn b M a Cleavage Cleland. K. W. — a (1)G Holter, H. and Zeuthen, E. — b (1)G Kuno, M. — a G Zeuthen, E. — c (4)G Green, Mrs E. U. — a (2/5)J Holter, H. and Zeuthen, E. — b (1)J Shaver, J. R. — c J Waddington, C. H.; Selman G. G. and Yates, H. — e J Austin, C. R. and Braden, A. W. H. — a •(2)M Chang, M. C. — a M b Mitosis Lison, L. and Pasteels, J. J. - -a (2) Stich, H. — c (2)C Stich, H. — d (2/5)C Stich, H. — e (2/5)C Makino, S. — b D Stich, H. — a (2)D Stich, H.— ^b (2)D Stich. H. — d (2/5)D Stich, H. — e {2/5)D Butros, J. — a (2/3)E Holter, H. and Zeuthen, E. — b (1)G Zeuthen, E. — c (4)G O'Connor, R. J. — a (1)V Stich. H. — c (2)1 Holter, H. and Zeuthen, E. — b Stich, H. — c 6 Further development o[ Invertebrates :2)j (5) C 1/6)D D D D (2)D D (4)D (1)D (1)D {3)D a General subjects, complete development Kriszat, G. — a Seidel, F. — b Bodenstein. D. — c I Goszwald, K. — b Henke, K. and collaborators — b Liischer, . — a Mulnard, J. — a Seidel, F. — b Shulov. A. — a Tuft, P. H. — a Tuft, P. H. — b Ulrich, H. — a Bosschaert, D.; Braat, Miss C. H M.; Haije. Miss S. C. A.; Lyesen, Miss A. H.; Nicolai, J. H. W.; Paris, Miss A. J.; Raven. Chr. P.; Rijckevorsel, F. van; and Vries, Miss, L. G. de -a (5)E Raven, Chr. P. — c Visschedijk, A. H. T. — a Backstrom, S. A. A. — a Bernstein, M. H. — a Borei, H. — a Cheney, R. H. — a Cheney. R. H. — b Cigada, Miss M. — a Gustafson, T. — c Hagstrom, B. E. — a Harvey. Mrs E. Browne — b Holter. H. — a Kavanau. J. L. — a Lindahl. P. E. — d Monne. L. — b Monroy, A. and Nicola, Miss M. de — a Ranzi. S. — a Runnstrom. J. A. M. — ^d Colwin, A. L. — c Minganti, A. — c Nieuwkoop, P. D. — f (5)E (3)E (5)G 1/2 )G (1)G (5)G (5)G (2)G G G G (2)G 1/5 )G G (2)G G (2)G (5)G (5)H {1)H 1/5 )H III. 6b. 141 III. 7a. b Primitive development (including early development) Jaffe. L. F. — b Plants Tyler A. — b C Kajishima. T. — b (2)D Bernstein. M. H. — b (5)G Gustafson, T. — a (2/5)G Hultin, J. M. T. — a (1)G Lindahl, P. E. — c G Perlmann, H. P. — a (2)G Tyler. A. — b G c Inducation and determinaiton Barth. L. G. — b B Citterio. P. — a (1)G Horstadius. S. — a G Lallier. R. A. — d G Barth, L. G. — b H Farinella-Ferruzza, Mrs N. — b (5)H Passalacqua, Miss A. — b (5)H d Development of part of the organism (head) c Development of special organ systems Central nervous system Upton. Miss B. C. — a C Eye Butz, P.; Ludtke, H. and Haas, G. — a D Ludtke, H. — a D Salivary glands Lesher, S. W. — a (2)D Gonads and sex determination Querner, H. — b C Aoto, T. — b (6)D Endocrine glands Dohrn, P. — b D f Histo- and cytochemistry Urbani, E. — f EV Urbani, E. — g P Denuce, J. M. — b D Orlandi. Mis A. — b D Mancuso, V. — b (2)E Monne, L. — a G Swedmark. B. G. — a G Mancuso, V. — a (2)H g Serological studies Spiegel, M. — b A Perlmann. H. P. — a G 7 Further development o[ Vertebrates a General investigations General subjects Castigli Pitotti, Mrs M. — c Goodhart, C. B. — b Rugh, Roberts — a Schechtman, A. M. — a Batty. Th.; Winblad, J. and Tracy, H. C. — a Querner, H. — a Tracy. H. C. — c Urbani, E. — a Winblad, J. — b Arosio, G. — ■ c Bernstein, M. H. — a Bondi, C. — a Brachet, J. L. A. — b Bracket, J. L. A. — d Cenacchi, Miss M. — a Chiriboga, J. — a Chiriboga, J. — b Cigada, Miss M. — a Dent, J. N.— b Fontana, J. S. — a Fontana, J. S. — b Guardabassi, Miss A. — c Hoff-Jorgensen, E. and Zeuthen, E. — a Imbriano, O. — a Kawakami, I. — ^b Lallier, R. A. — a Lallier. R. A. — c Leone, V. — b Lovtrup, S. — a Lovtrup, S. - — b Maltese, Miss C. — a Monet. Miss N. A. — a Moore. Mrs B. C. — a Nace, G. W. — a Osawa. S. and Yamada, T. — a Osawa. S.; Naora, H.; Sibatani, A and Yamada, T. — b (1 Ranzi, S. — a (2 Sirlin, J. L. — a (6 Sirlin. J. L. — c Spiegel, M. — a Sze. L. C.— b Takata, K. and (1)V V (4)V (3)V (6 (1 (1 (1/2 (1 (5 (5 (1 (6 (1/2 (2 (6 (6 (1/2 (6 (2 (1/2 (1 (5 (5 (1 (2 (1 (1/2 (2 (1 (1 (1/2 (2) III. 7a. 142 III. 7c. Yamada, T. — a Takata, K. — b Thomason. Miss D. — a Tuft. P. H. — c Urbani, E. — b Borei. H. — b Boyer, C. C. — a Cigada, Miss M. — a Ebert, J. D. — a Ebert, J. D. — c Evans, H. J. — a Henke, K. and collaborators Hunt, E. L. — a Hunt, E. L. — b Konigsberg, I. R. — b Moog, Miss F. — a Ranzi, S. — a Rhodes, Mrs M. B. — a Richter, K. M. — a Rinaldini, L. M. — a Rudnick, Miss D. — b Saunders, J. W. — e Spratt Jr, N. T. — b Belanger, L. F. — a Blechschmidt, E. — c Caspari, E. W. — c Cheney, R. H. — ^c Flexner, L. B. — b Graumann, W. — c Hammond, W. S. and Yntema, C. L. — d Hillemann, H. H. — j Hooker, D. — a Hooker, D. — b Humphrey, Miss T. — ^ c Levy, Mrs G. — a Moog, Miss F. — a Rinaldini, L. M. — a Runner, M. N. — b Seidel, F. — a Smithberg, M. — b Snyder, F. F. — a Snyder, F. F. — b Snook, T. — c Waelsch, Mrs S. Gluecksohn Young, W. C. — a Complete development O Connor, R. J. — b Later development Hillemann. H. H. — 1 (1 (1/5, (1)1 (1)J (2)J (1)J 1/5)J /2)L (1)L (2)L (1)L (1)L (5)L b L (1)L (1)L (1)L (1)L (2)L /6)L (5)L (6)L (1)L (4)L (1)L M (5)M M (5)M M (2)M (5)M (1)M M M M (6)M (1)M (6)M M M M 1/5)M (5)M M b M (6)M (1)L L Fitzgerald, L. R. — a (4)M Fitzgerald, L. R. — b (1)M Hillemann, H. H. — e M Implantation and placentation Bautzmann, H. — c V Boving, B. G. — a M Harrison, R. J. — f (2)M Hillemann, H. H. — a M Hillemann, H. H. — d M Hillemann, H. H. — k (1)M Konopacka, Mrs B. — a (2)M Konopacka, Mrs B. — b (2)M b Primitive development (including early development) Nakano. E. — b (5)1 Gothic, Miss M. M. C. S. — a (5)J Gothie, Miss M. M. C. S. — b J Spiegel, M. — b J Townes, Ph. L. — a J Ford, P. — a (2)L Dalcq. A. M. and coworkers — a (2)M Skreb, N. — a (2)M Early development Nakano, E. — a (1)1 Brachet, J. L. A. and Pasteels, J. J. — c (2)J Green, Mrs E. U. — ^a (2/5)J Ikushima, N. — a (3)J Masuda, H. — a (2)J Rostand, J. — d (4)J Ebert, J. D.— b (6)L Pincus, G. — b M Gastrulation Grant, Ph. — b (1)J Grant, Ph. — d (1)J Gregg. J. R. — a (1)J Selman, G. G. — b J N eurulation Newth, D. R. — b (3) J c Induction and determination, etc. Nieuwkoop, P. D. — d Deuchar, Miss E. M. and Waddington, C. H. — c Nieuwkoop, P. D. — e Induction Englander, H. — a Johnen, Miss A. G. — a Kuusi, Miss T. — b J (2)J L J J J III. 7c. 143 III. 7e. 4. Lallier, R. A. — b Rollhauser-ter Horst, Mrs J. O. B. — a Schreiber. B. — a Toivonen, S. I. — a Vahs, W. — a Determination Grobstein. C. — a Citterio, P. — a Lallier, R. A. — d Regulation and organisation Hama, T. — a ( d Development of parts of the organism Limbs and wings Dalcq. A. M. — b Cairns, J. M. — c Tail Dalcq, A. M. — b e Development of special organ systems Skin General subjects Barch, Mrs S. — a Hair Hardy, Miss M. H. — b Hardy, Miss M. H. — d Isings, J. — a Isings, J. — b Feathers Kiihn. O. — b Rawles, Miss M. E. — a Willier, B. H. — a Glands Cohn, S. A. — b Pigment cells and patterns Hamilton, H. L. — b Markert, C. L. — a Rawles, Miss M. E. — a Saunders, J. W. — b Saunders, }. W. — d Willier, B. H. — a Willier, B. H. — b Willier, B. H. — c Hardy, Miss M. H. — b Markert, C. L. — a Nervous system General subjects Tracy, H. C. — b (5)1 (5)1 J V (1)J J (2)J (2) L (2) (1/6)J M (2)M (2)M (6)M L L (2)L (2)M L (1)L L L L (2)L (2)L (6)L M (DM Roofc, P. G. and Wenger, Mrs E. L. — a (2) J Hamburger, V. and Levi-Montalcini, Miss R. — a L Preto Parvis, Mrs V. — a (2)M Central nervous system Grobstein. C. — a V Eayrs J. T. — a (6)M Edgar. G. W. P. — a (2)M Humphrey, Miss T. — c M Teysseyre, Miss J. — a (6)M Brain Crelin, E. S. and Stone, L. S. — a J Crelin, E. S. and Stone, L. S. — b J Filogamo, G. — b (2)L Flexner, L. B. — a M Giroud, A. — a M Spinal cord Holtzer, H. — a J Holtzer, H. — d J Lumb, Miss E. S. — a (2)L Zuidweg, M. H. J. — a (2)L Accessory organs Paraphysis Langevoort, H. L. — a L Pineal body Pflugfelder, O. — b I Ganglia Spinal ganglia Lumb, Miss E. S. — a (2)L Nerves Spinal nerves Lumb, Miss E. S. — a (2)L Special sense organs Eye Coulombre, A. J. — a (2)L Hermann, G. and Liidtke, H. — a M Eye (s.s.) Crelin, E. S. and Stone, L. S. — a J Rhodes, S. A. — b (2) J Stone, L. S. — b J Lens Gate, G. ten — a (2) J Gate, G. ten — a (2)L Ear Blechschmidt, E. — f M Skeleton General subjects Batty, Th. — c I Schreiber, B. — a J III. 7e. 4. H4 III. 7e. 10. (2)J (2)L (2)L (2)L (1)L M M M M (2)M (1/3)M Hale, L. J. — a Hogewoning, C. H. — a Hogewoning, C. H. — b Kieny, Miss M. A. — a Muscular system General subjects Kalk. Mrs M. J. — a Herrmann, H. and Neukom, B. J. — a Herrmann, H. and Neukom, B. J. — b Herrmann, H. and Neukom, B. J. — c Lerman, L. — a Rollhauser, H. — a Villafranca, G. W. de — a Wendt, G. G. — a Visceral muscles (head and trunk) Csapo, A. I. — a Csapo, A. I. — b Csapo, A. I. — c Alimentary tract General subjects Batty, Th. — b Liver Hoffman, H. and Schechtman, A. M. — ' Armstrong, P. B. — a Armstrong, P. B. — a Flexner, L. B. — a Hillemann, H. H. — j Heart, vascular system and blood General subjects Batty, Th. — c Reynolds, S. R. M. — a Heart Grodzinski, Z. — 'b Grodzinski, Z. — d Grodzinski, Z. — e Davies, F. and Francis, E. T. B. — b Ebert, J. D.— c Davies, F. and Francis, E. T. B. — b Hall. E. K. — a Arterial and venous system Froud, M. D. — ^b Bartelmez, G. W. — a Capillary system Bartelmez, G. W. — a L (6)L (6)L L (3)V I J M (1)M I M (4)1 I (4)1 L (1)L M M L M M Coelomic cavities and endothelia. Lymphatic system and connective tissue Lymphatic tissue Ebert, J. D. — d L Menschik, Z. — a M Menschik, Z. — b (2)M Urogenital system and sex determination General subjects Katakura, Y. — b D Kidney and urinary ducts Johnson, F. R. — a M Gonads Dalcq, A. M. — b (2) Aoto, T. — a J Asayama, S. — b (2)J Takamoto, K. — a (2) J Haf fen, Miss K. — c L Limborgh, J. van — a L Lipschutz, A. — a (6)M Genital tracts Dalcq, A. M. — b (2) Pfleger, Miss D. — a (2)L Bartelmez, G. W. — a M Corner, G. W. — b M Csapo, A. I. — a M Csapo, A. I. — b (2)M Csapo, A. I. — c (1/3)M Reynolds, S. R. M. — b M Accesory glands Dalcq, A. M. — b (2) Sex determination Asayama, S. — a (6) J Humphrey, R. R. — c J Miyamori-Yamamoto, H. — a (6) J Grabowski, C. T. — a (6)L Limborgh, J. van — ^b L Lutz-Ostertag, Mrs Y. and Wolff. Et.—b (6)L Mintz, Miss B. — a (6)L Reinbold. R. — a (6)L Wolff. Mrs Em. — b L Wolff, Et.; Wolff, Mrs Em.; Hampe, A.; Lutz-Ostertag, Mrs Y.; Pfleger, Miss D.; Salzgeber, Miss B. and Strudel, G. — b L Burns, R. K. — a (6)M Fischberg, M. — c M III. 7e. 11. 145 III. 8a/b. Endocrine glands General subjects Konigsberg, I. R. — a Blount, R. F. — c Runner, M. N. — d Hypophysis Blount, R. F. — a Thurmond, W. — a Jest, A. D. — b Thyroid gland Jost. A. D. — b Adrenals Jost, A. D. — b Pancreas Konigsberg, I. R. — a £ Histo- and cytochemistry Arosio, G. — a Lison, L. and Pasteels, J. J. - Oralndi, Miss A. — a Orlandi, Miss A. — b Sauser, G. — ^ b Urbani, E. — f Woerdeman, M. W. — c Ficq, Mrs A. A. — a Kuusi, Miss T. — b Mookerjee, S. — a Rappaport Jr., R. — a Steinert, M. — • a Steinert, M. — b Herrmann, H. and Neukom, B. J. — a Herrmann, H. and Neukom, B. J. — b Hogewoning, C. H. — a Hogewoning, C. H. — b Mookerjee. S. — a Preto Parvis, Mrs V. — c Spratt Jr, N. T. — b Cohn, S. A. — b Grobstein, C. — c Hintzsche, E. — a Menschik, Z. — b Preto Parvis, Mrs V. — c Preto Parvis, Mrs V. and Roncoroni, G. — ' d g Serological and immunological studies Nishihara, T. and Schechtman, A. M. — a Arosio. G. — b Clayton-Freedman, Mrs R. M. -a J (1)L Kalk, Mrs M. J. — a M Nace, G. W. — a M Nace, G. W. — b Spar, I. L. — a J Spiegel, M. — b J J Ebert, J. D. — a (1)L M Ebert, J. D. — d L Heim, W. G. — a L M Knight, Miss P. and Schechtman, A. M. — a L M Schechtman, A. M. and Schjeide. A. O. — b L L Schechtman, A. M. and Weller, E. — e L V V V V V V V (5)J Schechtman, A. M. — g L Trollope, Miss E. M. — a L Arosio, G. — b M Bilhngham, R. E. — a M Brambell. F. W. R. — a M Clayton-Freedman, Mrs R. M. -b M Hemmings, W. A. — a M Henderson-Phillips, Mrs M ^ -a M Krauss, M. — a M Krauss, M. — b M T Medawar, P. B. — a M L (6)L {6)L L L (1)L M M M M M M V T 8 Growth and diflerentiation (Invertebrates and Vertebrates) a Growth Newton, B. L.; Rose, J. M. and Zackry, D. — c Cheney, R. H. — d Plants Querner, H. — b C Cheney. R. H. — a (5)G Cheney, R. H. — b (5)G Coninck, L. A. P. De; Diercks, Fr. and Denuce, J. M. — a (6) J Oksche, A. A. — a (6) J Harris. M. — b (1)L Harris, M. — c L Kutsky, R. J. — a (5)L Spratt Jr. N. T. — a L Wendt, G. G. — a M a/b Growth and differentiation Karczmar, A. G. — a {l)f Tondury, G. — e (6)J III. 8a/b. Levi, G. L. — b Hintzsche, E. — ^ b Krauss, M. — b Newton, B. L. — a b Differentiation Nishihara, T. and Schechtman, A. M. Bonner, J. T. — a Markert, C. L. — b Markert, C. L. — b O'Connor, R. J. — a 146 HV (5)M M M Plants (2)G (2)H V Clayton-Freedman, Mrs R. M Dainty, J. and Deuchar, Miss E. M. — a Karczmar, A. G. — c Filogamo, G. — b Hale, L. J. — a -a J (3)1 (5)J {2)L L IV. 2a. Hamilton, H. L. — b L 9 Nutrition o[ embryo (Invertebrates and Vertebrates) Schnetter, M. — ^b D Kavanau, J. L. — a (5)G Kemp, N. E. — a J Osawa, S. and Yamada, T. — a } Grodzinski, Z. — a (2/3)K Grodzinski. Z. — c (2/3)K Ebcrt, J. D. — b (6)L Grodzinski, Z. — a (2/3)L Harris, M. — a L Harris, M. — b L Herrmann, H.; Lubchenco, L.; Mackenzie, J. and Rothfels. U. — e (6)L Spratt Jr, N. T. — a L Menschik, Z. — a M IV. DEVELOPMENT AND GENETICS SUBDIVISION 1 Theoretical problems and general questions a Theoretical problems b 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 CHARACTER OF INVESTIGATION (i; (2: (4: Metabolism and respiration Cytochemistry Physical treatment (6) Influence of hormones and vitamins 1 Theoretical problejns and general questions a Theoretical problems b General questions Beatty, R. A. — b M Caspari, E. W. — ^ c M 2 General genetical studies a General studies Larambergue, M. de — c Benazzi-Lentati, Mrs G. — a Lepori, N. G. — a Lepori, N. G. — b B C C C IV. 2a. 147 IV. 3b. D D D (3)D G G (2)V J J J J L M M (1)M M M M (1 Papi, F. — a C Henke, K. and collaborators — c D Katakura, Y. — ^ b D Orlandi, Miss A. — b (2)D Pardi. L. — a Reeve, E. C. R. and Robertson, F. W. — a Sigot, A. — a Ulrich, H. — a Hagstrom, B. E. — a Harvey, Mrs E. Browne — b Orlandi, Miss A. — b Callan. H. G. — b Colombo, G. — a Humphrey, R. R. — e Humphrey. R. R. — f Markert, C. L. — a Latimer, H. B. — ^c Makino, S. — a Markert, C. L. — a Runner, M. N. — a Runner, M. N. — c Runner, M. N. — d Waelsch, Mrs S. Gluecksohn — a M b Hcteroploidy Benazzi, M. — a C Omodeo, P. — b C Mulnard, J. — c D Fankhauser, G. — a Fankhauser, G. — b Fankhauser, G. — c Fankhauser, G. — d Fankhauser, G. and Humphrey, R. R. — e Fischberg, M. — a Gallien, L. — b Humphrey, R. R. — c Humphrey, R. R. — d Moore, Mrs B. C. — a Moore, J. A. — a Moore, J. A. — b Selman, G. G. — c Beatty, R. A. — a M Fischberg, M. — b M c Hybridization Harvey, Mrs E. Browne — a (4)G Minganti, A. — a H Baltzer. F. — a J (4) (6) (6) Brachet, J. L. A. — a (1 Callan, H. G. — a Gregg, J. R. — a (1 Humphrey, R. R. — c Humphrey. R. R. — d Moore, J. A. — a Moore, J. A. — b d Chimaera Baltzer, F. — b Baltzer, F. — c e Merogony 3 Analysis o[ influence o[ special genes and mutants a Special genes and mutants Castiglioni, Miss M. C. — b D Counce, Miss S. J. — a D Kuhn. A. — b D Kuhn, A. — c D Nef. W. and Rosin, S. — a D Newby W. W. — a D Sobels. F. H. — a D Utrecht, W. van and Sobels, F. H. — a D Waddington, C. H. — c D Dalton, H. C — a J Rostand, J. — b J Cairns, J. M. — b L Kieny, Miss M. A. — b L Landauer, W. — a L Carter, T. C. — a M Caspari, E. W. — b M Clayton-Freedman, Mrs R. M. — b M Fraser, A. S. — b M Griineberg, H. — a M Lyon, Miss M. F. — a M Lyon, Miss M. F. — b M Truslove, Miss G. M. — a M b Lethal factors Ede. D. A. — a D El Shatoury. H. — a D Faber, J. and Florschiitz-de Waard, Mrs }. — d D Utrecht, W. van and Sobels, F. H. — a D Humphrey. R. R. — f J Landauer, W. — c L V. 1. H8 V. 2e. 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. 121 — 123) ■^ Tumours 1 Theoretical problems and general questions 2 General investigations in pathological development a General subjects J M M M M Baltzer, F. — a Brandt, W. — b Grobstein, C. — c Gruenwald, P. — b Runner, M. N. — c Smithberg, M. — a b Relation between host and graft Newton, B. L.; Rose, J. M. and Zackry, D. — c Holtfreter, J. K. F. — b J Fraser, A. S. — b M Newton, B. L. — b M c Pathological influence of chemi- cal treatment and deficiencies Kiihn, O. — c Newton, B. L.; Rose, J. M. ar id Zackry, D. — c Mori, H. — a D Green, Mrs E. U. — a J Holtfreter. J. K. F. — a J Lombard. G. L. — a J Raunich, L. — f I Ancel, P. — a L Evans, H. J. — a L Gruenwald. P. — a L Herrmann. H.; Lubchenco, L.; Mackenzie, J. and Rothfels, U. — e L Landaucr, W. — b L Landauer, W. — d L Mickiewicz, Miss Z. — a L Richter, K. M. — a L Carter, T. C. and Waddington, C. H.— b M Desclaux, P. — b M Giroud, A. — b M Giroud. A. — c M Hammond, W. S. and Yntema, C. L. — d M Lefebvres-Boisselot, Mrs J. — a M Makino, S. — d M Morion, Miss C. a M Sinclair, L. K. P. — b M Wilhams, R. G. — c M d Pathological influence of physical treatment Herrmann, H.; Lubchenco, L.; Mackenzie, J. and Rothfels, U. — e L Manhoff, L. J. ■ — a L Wey-Schue, Mrs M. — b L Gennaro Jr, J. F. — a M McCafferty. R. E. — a M e Teratology Omodeo, P. — a C Wolff. Et. — a L Gilbert, Miss C. and Gillman, J. — b M V. 2e. 149 V. 4. Gilbert, Miss C. and Gillman, J. — c Giroud, A. — d Levy, Mrs G. — b 3 Development o[ special malformations and patho- logical development of special organs a Development of special malformations Bretscher, A. — a Pflugfelder, O. — c Carter, T. C. — a Harrison, R. J. and Harrison Matthews, L. — e Humphrey, Miss T. — d Lehevre, A. — a Orts Llorca, F. — c Phihps, Miss R. J. S. — a Runner, M. N. — a Shaner, R. F. — b Shaner, R. F. — c Tondury, G. — a Tondury, G. — b Tondury, G. — d b Pathological development of special organs Wings Kloft, W. — b Central nervous system Holmdahl, D. E. — e Delmas, A. — b Sensenig, E. C. — b Sense organs Delmas, A. — b Eye and lens Castighoni, Miss M. C. — b Chase, H. B. — a Giroud, A. — e Hall, E. K. — b Lefebvres-Boisselot, Mrs J. — b Skeleton Brandt, W. — a Theiler. K. — b L M Jest, A. D. — d M M Schenk, R. — b M M Sensenig, E. C. — b M Sensenig, E. C. — c M Theiler, K. — a M Theiler, K. — b M Heart and vascular system Stephan, Fr. — b L Reis. R. H. — a M Shaner, R. F. — a M L Urogenital system L M Uchida, T. — c D Harrison, R. J. — b M XV X Harrison, R. J. and M M Harrison Matthews, L. — e M Phihps, Miss R. J. S. — a M M Hypophysis M Blount, R. F. — b J M M M 4 Tumours Pflugfelder, O. — a EV M Barigozzi, C. — b D M Hartung, E. W. — a D M Makino, S. — h D M Holmdahl, D. E. — f V Pflugfelder, O. — a V D V M M M D M M M M J Barigozzi, C. — a Goodhart, C. B. — a Lehmann, F. E. — e Raunich, L. — f Spirito, A. — a Tweedell, K. S. — a Tweedell, K. S. — b Weber, R. — b Hillemann, H. H. — m Makino, S. — c Makino, S. — d Makino, S. — e Makino, S. — f Makino, S. — g Makino, S. — h Mookerjee, S. — d Newton, B. L. — b M M M M M M M M M VI. 1, 150 VI. 3b. VI. REGENERATION SUBDIVISION 1 Theoretical problems and general questions a Theoretical problems b General questions 2 General investigations, 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. 121 — 123) CHARACTER OF INVESTIGATION (4) Physical treatment (5) Chemical treatment (6) Influence of hormones and vitamins 1 Theoretical problems and general questions a Theoretical problems b General questions Masuda, H. — b 2 General investigations, including total regeneration J Barth, L. G. — b B Lehmann, F. E. and Tardent. P. — d B Lehn, H. — a B Trampusch, H. A. L. — a B Hubl. H. — b (6)C Ichikawa, I. — c C Kawakami, I. — c C Needham, A. E. — b C O'Brien. B. R. A. — a C collaborators of t Penners, A. — a c collaborators of t Penners, A. — c (4)C Trampusch, H. A. L. — a c Kuhn. A. — a D Needham, A. E. — c D Needham, A. E. — d D Barth. L. G. — b H Butler, E. G. — c H Anton, H.-J. — a V Woerdeman, M. V/. — c V Singer, M. — a Gallien, L. — c Goodhart, C. B. — a Grant, Ph. — c Karczmar, A. G. d Lecamp, M. — a Mookerjee, S. and Sanyel, S. Weber, R. — a Wey-Schue, Mrs M. — a Abercrombie, M. and (5; Miss J. E. Santler — c M Grobstein, C. — c M Hillemann, H. H. — f M Krauss, M. — c M 3 Partial regeneration a General subjects Hubl, H. — a (4)C Stephan-Dubois, Mrs Fr. — a C Stephan-Dubois, Mrs Fr. — b C Wolff, Et.; Lender, Th. and Stephan-Dubois, Mrs Fr. — c C Trampusch, H. A. L. — b J Trampusch, H. A. L. — d J Weber, R. — c J b Tail regeneration Horn, E. C — b I Conink, L. A. P. De; Diercks, Fr. and Denuce, J. M. — a (6)J Lehmann, F. E. and collaborators — b (5)J VI. 3b. Raunich. L. — b J c Limb regeneration Needham, A. E. — a D Butler. E. G. — a J Butler, E. G. — b J Butler, E. G. — d (4)J Coninck, L. A. P. De: Diercks, Fr. and Denuce, J. M. — a (6)J Karczmar, A. G. — a (1)J Karczmar, A. G. — b (5) J Mettetal, C. — a j Yntema, C. L. — b J d Regeneration of special organ systems Nervous system Gontcharoff, Miss M. — a Leghissa, S. — e Liu, J. C. — a Kollros, J. J. — d Leghissa, S. and Pasquini, P. — d Campenhout, E. van — b Littrell, J. L.; Windle, W. F. and Stuart, E. G. — b L Edds, M. v. — a M Littrell, J. L.; Windle, W. F. and 151 (4)C V V J (5)J L Stuart, E. G. — a Eye (s-s.) Lender, Th. — a Reyer, R. W. — a Steinitz, H. and Stone, L. S. Steinitz, H. and Stone, L. S. Steinitz, H. and Stone, L. S. — c Stone, L. S. — a Amprino, R. M. — b Lens Sato, T. — b Pasquini, P. — a Reyer. R. W. — a Sato, T. — a Steinitz, H. and Stone, L. S. — c Stone, L. S. — c Trampusch, H. A. L. — c Woerdeman, M. W. — a Alimentary tract Sengel, Ph. J. — a Wilson. J. W. — a Omodeo, P. — c Gonads Vannini, E. — d Vn. 2a. M C VII. METAMORPHOSIS SUBDIVISION 1 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. 121 — 123) CHARACTER OF INVESTIGATION (5) Chemical treatment 7 Theoretical problems and general questions Ubisch. L. V. — b 2 General investigations a General subjects Knight-Jones, E. W. — a Henke, K. and collaborators — a Kloft, W. — a Knight-Jones, E. W. — a Liischer, M. — a Piepho, H. — a Sandison, Miss E. E. — a Silen, L. K. P. — a (6); (6)| HV c V J D D D D D D F VII. 2a. Minganti. A. — c ( 1 ) H Baxter, E. W. — a Horn, E. C. — a Castigli Pitotti, Mrs M. — b Dent, J. N. — a Humphrey, R. R. — e Leghissa, S. and Pasquini, P. — d (5) J b Hormones and metamorphosis Bodenstein, D. — b D Ichikawa, M. and coworkers — a D Liischer, M. — b D Yashika, K. — a D Kalin, J. — c J Kollros, J. J. — c J Toivonen, S. I. — c J c Metamorphosis of part of the organism Okazaki, Miss K. — a G 152 VII. 2d. d Metamorphosis of special organ systems Skin Kollross, J. J. — c (6) Brain Kollros, J. J. — g Skull Sedra, Shokralla N. — b Michael, Milad I. and Sedra, Shokralla N. — a Intestinal tract Harder, W. — a Kollros. J. J. — c (6) Gonads Bier. K. — b D Endocrine glands Leghissa, S. — f (6) J 153 General questions anJ announcements I. The Hubrecht Laboratory. The Laboratory has undergone an internal remodehng. Six new laboratory rooms have been added, and consequently the number of working-places has increased from about 10 to about 20. Moreover a new and modern aquarium room is now in use, and two constant-temperature rooms have been constructed, one for 20°— 25° C. and the other one for 35°— 40° C. The latter room has been designed for the work on avian eggs which is planned for the future. IL The Central E m b r y o 1 o g i c a 1 Library. (C.E.L.) A. Organisation, extension etc. The card-index of the collection of reprints is three-fold, viz. according to 1. years of appearance, 2. authors and 3. subjects. The classification-system used for the subject-index is the same as that used in the G.E.LS. We want to tank those wo this year again sent us reprints. We hope that all embryologists will realize the importance of sen- ding their reprints (in two- fold) to the Central Embryo- logical Library, where they will particularly be of great use both to the guest-workers of the Hubrecht Laboratory and to the embryologists working in those parts of the world where the supply of Hterature is restricted. Our plans for an annual survey of embryological literature have been replaced by plans for an Abstracting Preview Service. For further data see chapter g (page 156). May we remind you of our request to place in the C.E.L. those private collections of books and reprints which are not in use any more and which may otherwise get lost? B. Services rendered by the C.E.L.; conditions /or borrowing. 1 . Every embryologist can ask for information about literature of certain authors, for surveys of hterature on certain subjects (accord- ing to the classification-system of the G.E.LS.), for surveys of newly published literature, etc. 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 Holland. Conditions. a. Reprints may be borrowed for 3 months at the utmost (for Holland 1 month), time for shipment not included. b. The receipt, added to the consignment, must be returned b y return of post, after having been controlled and signed. c. In case of high forwarding-charges they 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 disposal of every embryologist who is carrying out scientific work at the Hubrecht Laboratory. in. The Central Embryological Collection of slides and material. 154 A. The Collection. The extensive embryological material, collected by Prof. Dr A. A. W. Hubrecht during his life, is present at the Hubrecht Laboratory in the form of an enormous number of slides and an extensive material kept in alcohol. This collection, containing complete embryological material of many very interesting and rare animals, is in a very good condition. Dr D. de Lange, Director of the Hubrecht Laboratory from 1916 up till 1947, has extended this material in several aspects, while a number of embryologists have donated their private collections to the central collection of the Hubrecht Laboratory. At the present moment the Hubrecht Laboratory possesses the complete collections of shdes of the late Prof. Dr Anton Dohrn, former Director of the Zoological Station in Naples, a part of the collection of the late Prof. Dr E. Selenka, the experimental-embryological collection of shdes of the late prof. Dr H. Spemann, etc., while recently Prof. Dr F, Hochstetter from Vienna promised to leave his very important and extensive collection of shdes and material to the ,,Institut International d'Embryologie" to be placed in the Hubrecht Laboratory too. The central collection will be at the disposal of all embryologists, as they can study the material at the Hubrecht Laboratory, and parts of the collection may be borrowed under special conditions (see section B). Besides a very detailed card-index we are composing a more general cata- logue of the whole collection, which will in due course be sent to all embryolo- gical institutes, in order to make the collection more easily accessible. We like to draw your attention to the very great advantages of a Central Embryological Collection, with accomodation for embryologists to study it. Such a collection has a much higher value than individual small collections, distributed all over the world. We therefore would hke to ask from you all possible help and collaboration in increasing the value of our Collection. B. Conditions [or borrowing. 1. Slides a. If they do not consist of very important and rare material, may be borrowed for 1 year at the utmost, time for shipment not included. b. The receipt, added the consignment, must be returned b y return of post, after having been controlled and signed. c. The slides have to be packed safely on returning. d. In case of high forwarding-charges they have to be partly carried by the applicant. 2. Material may be borrowed and studied under the same conditions, but has to be returned as such or in the form of shdes, which become part of the central collection IV. The Photographic Reproduction Service. The Hubrecht Laboratory is willing to make photographic reproductions of any papers which are present in the C.E.L. or can be borrowed from elsewhere. These reproductions will be either positive transparent 155 microfilm prints (for use in a microfilm reading apparatus) o r enlarged ordinary prints. The negatives will remain at the Hubrecht Laboratory. Definitive prices could not yet be fixed, but the costs will certainly not exceed j^ 0.50 (=$0.15) per page, as long as there occurs no substantial change in the present costs of photographic materials. Apphcants wil receive an order from to be filled in, V. The Normal Table of Xenopus laevis. An extensive bibhography has been composed, comprising the anatomy and development of the Pipidae, and the development of Anura in general. Each collaborator has received the section pertaining to his/her subject. Four contributions have been received, and several others make satisfactory progress. Prof. S. Toivonen (Helsinki, Finland) has undertaken the description of the entire development of mouth and pharyngeal cavity (including thyroid gland, thymus, lungs). Dr R. Cambar and Mr R. Williaume (Talence, France), will study the development of the nephroic system up till metamorphosis. Prof. E Vannini (Modena, Italy) will examine the development of the gonads up till metamorphosis. Dr B. I. Balinsky (Johannesburg, South Africa) has taken over one of the subjects of Mr J. Faber (Utrecht, Holland): intestinal tract and glands. Facilitation of excliange anJ acquisition of laboratory animals From several sides we have been asked whether the Hubrecht Laboratory could play and intermediary role in the exchange and acquisition of laboratory animals. It will be evident that the role of the Hubrecht Laboratory has to be restricted to the mere providing of addresses either of trade organisations, or of institutes which want to enlarge their stock of animals on exchange basis. The latter task can be easily combined v/ith the activities of the General Embryological Infor- mation Service. Consequently we will, in the first place, take up contacts with trade organi- sations all over the world. In the second place, to every institute which collabo- rates with the G.E.I.S. we will send, together with the usual forms, a form meant to record data on species of laboratory animals available, species wanted, and conditions. The results will be published in a separate chapter of the G.E.I.S., to start with the 1953-issue. The resulting transactions should then be carried out directly between the interested parties. If there are any suggestions to improve these plans, we shall be only too glad to receive them. Communications of tlie „Institut International J'EmLryoIogie** (Embryological Section of tlie l.U.B.S.) The I. I.E. has to announce with regret the loss of three of its members 156 by death: Prof. Dr F. Th. LEWIS, who died at the age of 76 years; Prof. Dr H. STIEVE, who died in September 1952; and Prof. Dr G. KREDIET, who died in October 1952. Prof. Dr P. BOUIN resigned his membership. A General Assembly of the I. I.E. was held in the Zoological Laboratory of the University and the Hubrecht Laboratory in Utrecht, Netherlands, on August 30th — 31st, 1952. It was preceded by a Symposium on August 27th — 29th, organized by the I. I.E. with the financial support of I.C.S.U., I.U.B.S., the Rockefeller Foundation and the Netherlands Government. The theme of the Symposium was: The biochemical and structural basis of morphogenesis. There were 23 participants from 9 countries. The subject matter was divided into 9 themes, each of which was opened by an introductory paper. These papers were the following: 1. J. Clavert. Strasbourg: Biochemie d I'oogenese. 2. A. Monroy, Palermo: Biochemical and structural changes at fertihzation. 3. E. Zeuthen, Copenhagen: Biochemistry and metaboHsm of cleavage. 4. P. H. Tuft, Edinburgh: The energetic relationships during embryonic development. 5. T. Hultin, Stockholm: MetaboHsm and determination. 6. S. Ranzi, Milano: Proteins, protoplasmic structure and determination. 7. G. ten Gate, Amsterdam: The formation of enzymes during embryoge- nesis. 8. H. Herrmann, Denver: Biochemical development during organogenesis. 9. M. W. Woerdeman, Amsterdam: Serological methods in the study of morphogenesis. The introductory papers gave rise to animated discussions. The Proceedings of the Symposium will be pubhshed in the Archives Neerlandaises de Zoologie. In the morning of Saturday, August 30th, 1952, a private meeting of the LI.E. was held. It was attended by 10 members from 6 countries. The revised Statutes and by-laws were approved. The I. I.E. shall cooperate v/ith the Committee on Developmental Biology of the National Research Council, U.S.A., for the promotion of international cooperation in the field of develop- ment and growth. A resolution on the importance of a broader treatment of the modern dynamic aspects of embryological science for medical education was adopted. It further was decided that an Abstracting Preview Service will be built up, bimonthly issuing mimeographed copies of abstracts from abstracting journals for free circulation; a resolution was passed giving authorization for the solicitation of funds for such purpose. The Hubrecht Laboratory shall try to build up an organization for improving the possibilities for exchange of living materials between different countries. In future a fee of $ 20. — a month shall be asked from visiting scientists at the Hubrecht Laboratory. Seven persons were nominated for fellowship of the LI.E. The Board for the next period was elected, consisting of M. W. WOERDEMAN (president), A. DALCQ. E. FAURfi FReMIET, Miss H. FELL, F. E. LEHMANN. P. WEISS and Chr. P. RAVEN (secretary-treasurer). It was decided that the next General Assembly will be held in the summer of 1955, preferably in the United States. In the afternoon of August 30th and on August 31st, scientific meetings were held. The following papers were delivered: J. Pasteels, Brussels: Le developpement des formes exterieures chez le Cameleon. 157 M. W. Woerdeman, Amsterdam: Eye-operations on rat embryos in utero (with demonstration). A. Dalcq, Brussels: L'organisation nucleaire et cytoplasmique dans I'oeuf des Rongeurs (avec demonstration). Mrs R. Clayton, Edinburgh (as guest): Antigens and differentiation in the Newt. F. E. Lehmann, Berne: Morphogenetische Realisationsstufen nach Entwick- lungshemmungen oder nach Verschiebung des De- terminationsgeschehens durch chemische Faktoren. V. C. Twitty, Stanford: Experiments on the migration of embryonic chroma- tophores in vitro (with film). H. V. Br0ndsted, Copenhagen: The means and role of cell attachment for morphogenesis (germinating sponge gemmules) (with film). The Secretary, Chr. P. RAVEN. Revised Statutes of the I. I.E. At the General Assembly of the I. I.E. in Utrecht, August 1952, new Statutes and by-laws have been adopted. The main points of the new Statutes are the following: In future the International Institute of Embryology shall consist of fellows, members, emeritus-members and supporting members. All persons active in research in the field of morphogenesis may apply for membership. They may be elected by simple majority by a General Assembly upon sponsorship by 2 fellows and approval of the Board. Members shal have full voting rights. Their number is unlimited. The present ..members" in future will have the rank of ..fellows". The number of fellows shall be limited to 75. They constitute the College of Fellows and are elected by cooptation with a 2/3 majority. The members of the Board shall be elected from among the fellows. Part of the objectives of the Institute will be reahzed through the intermediary of the Hubrecht Laboratory, to which end the Board may appropriate part of the resources of the Institute to the profit of the Laboratory; these activities of the Hubrecht Laboratory, which are sponsored by the Institute, shall be supervised by the Board. List of fellows of the International Institute of Embryology H. B. Adelmann. Ithaca. N.Y. P. Ancel, Paris (Emer.) M. Avel, Bordeaux B. I. Balinsky, Johannesburg F. Baltzer, Bern L. G. Barth, New York. N.Y. G. R. de Beer. London H. Bluntschli, Bern (Emer.) J. Boeke. Utrecht (Hon. President) J. Brachet. Bruxelles P. Brien. Bruxelles A. J. P. V. d. Broek. Utrecht (Emer.) H. V. Brondsted. Kobenhavn W. Buno, Montevideo R. K. Burns, Baltimore. Md E. van Campenhout. Louvain F. de Castro, Madrid A. Celestino da Costa, Lisboa Chuang Hsiao-Hui, Peiping G. W. Corner, Baltimore, Md D. P. Costello, Chapel Hill, N.C. G. Cotronei, Roma A. Dalcq, Bruxelles N. Dragomirow, Moskow (proposed as to be member) R. M. Eakin, Berkeley. Calif. CI. Estable, Montevideo G. Fankhauser, Princeton, N.J. 158 E. Faure Fremiet, Paris Miss H. Fell Cambridge, Engl. D. Filatow, Moskow (proposed as to be member) P. Gerard. Bruxelles A. Giroud, Paris E. Hadorn, Ziirich V. Hamburger, St Louis, Mo W. J. Hamilton, London R. G. Harrison, Newhaven, Conn. (Emer.) Mrs E. B. Harvey, Princeton, N.J. K. Henke, Gottingen Ch. H. Heuser, Augusta, Ga J. P. Hill, London (Hon. member) L. Hoadley, Cambridge, Mass E. Holmdahl, Uppsala J. Holtfreter, Rochester, N.Y. S. Horstadius, Uppsala R. R. Humphrey, Buffalo, N.Y. E. Kopsch, Berlin (Emer.) F. E. Lehmann, Bern G. Levi, Torino (Emer.) W. H. Lewis, Philadelphia, Pa (Emer.) P. E. Lindahl, Uppsala G. Lopashov, Moskow (proposed as to be member) O. Mangold, Heihgenberg G. D. F. Murray, Sydney J. Needham, Cambridge, Engl. J. S. Nicholas, Newhaven, Conn. Reviews of recently publisteJ textbooks on Embryology ..ANTIBODIES AND EMBRYOS" 1951 by W. F. Rogers Brambell. The Athlone Press W. A. Hemmings and M. Henderson London 103 pages with 10 figures This book, which is based on the subject matter treated by one of the writers in a series of lectures before the University of London, describes the authors' recent researches on the passage of antibodies from the mother to the foetus in rabbits. These researches indicate that the antibodies reach the foetus by way of the uterine lumen and the yolk-sac, not by way of the placenta. An account is given of current knowledge on the transmission of passive immunity from mother to young in Mammals. The purpose of the book is rather to discuss the imphcations of the series of researches dealt with than to provide a critical and exhaustive review of the hterature. The fundamental problem involved is the mechanism of transmission of proteins across living membranes. The book is primarily addressed to vertebrate embryologists, immunologists, veterinarians Y. K. Okada, Tokyo S. Pai. Shanghai J. Pasteels, Bruxelles K. Peter, Birkenstein (Hon. member) L. W. Polezajew. Moskow (proposed as to be member) S. Ranzi, Milano Chr. P. Raven, Utrecht G. Reverberi, Palermo J. Runnstrom, Stockholm A. M. Schechtman, Los Angeles, Cahf. D. Starck. Frankfurt A. Stefanelh, Roma L. S. Stone, Newhaven, Conn. T. Thomson Flynn. Belfast S. Toivonen, Helsinki G. Tondury, Ziirich T. C. Tung, Tsingtao V. C. Twitty. Stanford. Cahf. A. Tyler. Pasadena. Cahf. L. V. Ubisch, Paradis C. H. Waddington, Edinburgh A. Weber, Geneve (Emer.) P. Weiss, Chicago, 111. B. H. Wilher, Baltimore, Md G. B. Wisloclci, Boston, Mass E. Witschi, Iowa City, Iowa M. W. Woerdeman. Amsterdam E. Wolff. Strassbourg C. L. Yntema, Syracuse. N.Y. 159 and medical scientists, but may be of interest to animal physiologists in general. There is an extensive bibliography of the relevant literature, an authors' and a subject index. Chr. P. RAVEN , DIE ENTWICKLUNG DES BRAUNEN GRASFROSCHES RANA FUSCA, Roesel" dargestellt in der Art der Normentafeln zur Entwicklungs- geschichte der Wirbeltiere 1952 by Dr Fr. Kopsch Georg Thieme Verlag Stuttgart 69 pages with 2 plates The elaboration of this normal table started already in 1898 but was inter- rupted many times by other scientific problems, which had to be given priority. We are the more thankful that Dr Kopsch has finally found time after his retirement at the age of 82 to complete this work and to publish it in the present extensive form. The description of the morphological and biological characteristics of the two related species Rana fusca and Rana arvalis, and the systematic survey of the distribution, reproductive period and external features of the full-grown larvae of the european anuran species form a very worthful enrichment with respect to the other Keibcl's normal tables in which the introduction is in general more summary. The material for this study was obtained by artificial insemination, and was reared in the laboratory. Although the homogeneity of the material is better guaranteed by this method one cannot be entirely sure that one is dealing with completely ..normal development" since the laboratory conditions (food, light, temperature, etc.) may actually differ from the natural conditions. The tabular survey of the development of Rana fusca starts with the two-cell stage as stage 1, whereas all other normal tables start with the one cell stage. This gives rise to a confusing lack of congruency of the various normal tables. The staging used, is, moreover, not adapted to requirements for experimental embryology, but merely represents a purely morphological characterisation of the development of this species. The early stages are rather far apart from each other. The description of the external form and the internal organization and diffe- rentiation is very accurate and extensive and is given in a surveyable and clear form. The systematical description of the development of the individual organ systems forms a very valuable supplement to the tabular, chronological survey of the development of this species. The absence of the chapter ,,hterature references" is undoubtedly an actual deficiency. The figures of the external form of the various stages are good and accurate. The enlargement of a number of them, especially in the general series with enlargement of 2.5 times is, however, too low. Although the general growth is more clearly demonstrated with a reproduction of the various stages in the same magnification, the value of the figures as an illustration of the text is much reduced. The figures on the first plate show clearly that a stage is missing between stage 19 and 20 where the size difference of the successive stages is too pronounced. The varying enlargement of drawing of the same 160 stage on the second plate — apparently made in order to reduce the number of plates — is rather confusing and inconvenient. All in all this normal table will undoubtedly find a worthy place among the world-known Keibel's normal tables on vertebrate development. P. D. NIEUWKOOP. „EARLY EMBRYOLOGY OF THE CHICK" Fourth Edition, 1951 by Bradley M. Patten The Blakiston Company 244 pages with 102 figures As the author emphatically mentions in the preface this book, designed for the beginning student, will only give the basic mechanisms of embryology in a brief and simple form. It forms a purely descriptive study of the development of a single form, the chick, over the period of the first four days in which processes of organization take place. The book is consequently given in the form a continuous story of development, thus introducing the dynamic aspect of development in the more static description of the various stages. The free use of illustrations and the logical organization of the text makes this book easily readible for the beginning student introducing him in the many-sided aspects of the external and internal development of the chick. After the description of the initial processes of gamete formation, fertiliza- tion and cleavage, the primitive streak formation and regression and its equivalent in lower Vertebrates has been thoroughly treated. In the later stages the formation of heart and vascular system and their functional aspects have had special attention, while the state of development of the other organ systems has not been neglected. The illustrations, which actually form a very important source of informa- tion, are very carefully made and excellently reproduced. The few colour plates of the vascular system at successive stages are aesthetically highly jus- tified and very attractive. All illustrations on the development of the chick are only schematised in minor details. They are in general very accurate and clear, and drawn from original sections or whole specimens. It is a pity that the figures on amphibian development used as illustration for the description of processes of cleavage, blastula formation and gastrulation of a holoblastic egg, are much more schematised and not always completely accurate. The changes in and extentions of the text and figures make this fourth edition much more up to date, and form an actual improvement. The rather extensive and surveyable bibliography at the end of this book would probably have better served its purpose of stimulating a reading of the original literature when references would have been made in the text. This book will undoubtedly contribute to a clearer understanding of the basic mechanisms of embryology of the chick and can be therefore widely recom- mended. P. D. NIEUWKOOP. „A LABORATORY MANUAL OF VERTEBRATE EMBRYOLOGY" Revised Edition, 1950 by R. Rugh Burgess Publishing Company Minneapolis 234 pages with many figures This laboratory manual forms a very good guide for courses in embryology. 161 This does not hold only for courses for premedical students or first year stu- dents in biology, but just as well for more advanced students who like to get a more detailed picture of the development of the frog and chick which forms are treated very extensively. Even instructors and teachers in biology may use the accurate and many sided information which this manual gives. The development of some invertebrate eggs with their different types of cleavage and the more extensive description of the development of Amphioxus form a good introduction. The fish development in the form of the development of the egg of Oryzias latipes — which seems to be an excellent laboratory animal — could, in our opinion, have shown to better advantage when the drawings would have been larger and more detailed. The photographs which do not show very well, could probably have been omitted. Students can even use this material for practical study. The embryology of the frog has been treated very thoroughly and accu- rately and forms the basis for an understanding of and a comparison with the development of the higher Vertebrates. Since the experimental embryology has been mainly studied on Urodeles, a short comparative sketch of the deve- lopment of Ambystoma or Triturus might have formed a very worthful exten- sion of the text. A similar suggestion can be made concerning the development of the reptilian egg where a short description adorned with some illustrations would have completed the general picture of vertebrate development. This is the more important since so many textbooks give the impression that verte- brate development is identical with the development of frog, chick and pig. The development of the chick is very comprehensive and illustrative. The formation and regression of the primitive streak so clearly visible in the chick might, however, have been treated somewhat more in detail. The normal table of the somite stages of the chick forms a good and surveyable source of information for the student. Although the chapter on mammalian development forms only a comparative sketch to the extensive chapters on chick development the text of the early mammalian development is, in our opinion, somewhat summary while also the human development could have been described and illustrated somewhat more richly. These suggestions for an extension of the text will not necessarily lead to an extension of the practical laboratory course but will, in our opinion, make this manual of vertebrate development much more universal and useful. P. D. NIEUWKOOP. „THE EPIGENETICS OF BIRDS" 1952 by C. H. Waddington Cambridge University Press 268 pages with 70 figures This new book gives a comprehensive survey of our recent state of know- ledge in the causal analysis of the early development of birds. After a dis- cussion of the various technical methods developed for experimental analysis in birds — among which the in vitro cultivation developed by the author and his coworkers — the early development with its fundamental problems concerning the segregation of the blastoderm into distinct germ layers, the formation and regression of the primitive streak and the interactions between the various germ layers in the four-dimensional process of organization and 162 segregation, has been extensively discussed. A comparison with the causal analysis of the early development in Amphibians demonstrates clearly how far the development. in both groups of Vertebrates goes parallel, and in what res- pects other mechanisms are involved. Moreover it shows to what point the analysis in both groups has led up till now. Since the analysis has been mainly based upon in vitro experiment under which conditions a normal development is not entirely guaranteed, the more general features and problems could be studied whereas the finer organization and differentiation could not be investigated very accurately. Processes of growth which are normally already involved in the early organogenesis, but which are absent under these experimental con- ditions, are only briefly mentioned. The biochemical aspects of morphogenesis have also been discussed in extenso. The development of the various organ systems which are reviewed systematically, is less comprehensive than the analysis in both groups has led up till now. Since the analysis has been mainly ing for so many years. Nevertheless, it briefly treats nearly all the experi- mental literature on this later phase of development. As the author mentions in his introduction the main problem was where to stop. We are not quite sure that he has already found the most adequate hmitation of the field treated. The later chapters on plumage and genetic effects in development have a rather fragmentary character. It might have been better to omit these chapters and to discuss the development of the various organ systems more extensively. The last chapter on the epigenetic organization of the chick which a.o. gives the author's point of view upon this central problem, is of great theore- tical importance and forms a very good conclusion of this book. The references of the literature are accurate and very extensive so that this clearly written book actually gives us a general survey of the literature in the field of the epigenetics of birds. Except for a few diagrams which are somewhat too schematic, the illustra- tions are very well chosen and excellently reproduced. Although the author refers more than once to the existing normal tables on the development of the chick, an introduction on normal development, freely illustrated, would certainly have facilitated the reading of the experimental chapters, especially for those not directly familiar with bird development. This purely scientific book really meets a general want and will be highly appreciated among embryologists. P. D. NIEUWKOOP .,AN INTRODUCTION TO VERTEBRATE EMBRYOLOGY" Second Edition, 1949 by H. L. Wieman Mc Graw-Hill Book Company, Inc. New- York - Toronto - London 404 pages with 247 figures This textbook, designed for introducing the premedical student in the embryology of the Vertebrates, gives first some general aspects of develop- ment. The chapter on gametogenesis is treated rather extensively. Except for some minor details an accurate survey is given of the development of the frog. The more extensive treatment of the development of the frog in this second edition certainly forms an improvement. The development of the chick is likewise treated with accuracy and thoroughness. Unfortu- nately the fundamental processes of gastrulation in the frog and 163 primitive streak formation in the chick are not very clearly described and are not brought completely up to date with our present knowledge of these impor- tant phases of development. In the chick the development of the central nervous system, sense organs, alimentary canal, circulatory system and genital system are discussed in detail. The chapters on mammalian development are also very comprehensive and give an excellent survey of our basic knowledge of the descriptive develop- ment of Mammals, in particular Man. The illustrations, large in number, are very well chosen and are for the far greater part reproductions of figures from original publications, so that the student gets also a very good impression of the morphology and histology. The last chapter on experimental embryology forms the weakest chapter of the book since it is rather fragmentary and in several respects not up to date. Although our knowledge of vertebrate embryology is chiefly based on amphibian, bird and mammalian development the complete absence of the embryology of fishes and reptiles must give the premedical student an incom- plete picture of vertebrate embryology especially from a comparative point of view. This is, in our opinion, a deficiency of many text books. Notwithstanding some suggestions for further improvement the thorough and in general very accurate treatment of the material presented makes this text book on vertebrate embryology recommendatory not only to premedical students but just as well to college students in general. P. D. NIEUWKOOP Edited by Dr P. D. Nieuwkoop adj. Director of the Hubrecht Laboratory 2 Janskerkhof, Utrecht, Holland MHI. \MI.M I II. |( \nv UH IBbl P