Marine Biological Laboratory IL, I B H A. R, 'ST JAN 21 1954 WOODS HOLE, MASS. GENERAL EMBRYOLOGICAL INFORMATION SERVICE 1953 (fifth issue) ISSUE OF THE HUBRECHT LABORATORY Issue of the Hubrecht Laboratory seat of the „lnstitut International d Embryologie (Embryological section of the l.U.B.S.) CONTENTS a) Introduction P- 5 b) List of names and addresses with subjects in preparation (alpha- betical order) P- ^ c) List of institutes with composition of scientific staffs (geographical order) p. 101 d) List of subjects with names of investigators (arranged according to organ systems and systematic groups) p. 124 General division p. 124 I Descriptive and comparative embryology . . . . p. 126 II Experimental developmental morphology . . . . p. 133 III Physiology of development p. 141 IV Development and genetics p. 149 V Development and pathology p. 150 VI Regeneration p. 152 VII Metamorphosis p. 154 e) „Supply and Demand" Service for laboratory animals . . . . p. 156 f) General questions and announcements p. 161 I The Hubrecht Laboratory p. 161 II The Central Embryological Library (C.E.L.) . . p. 161 III The Central Ebryological Collection of slides and material p. 162 IV The Photographic Reproduction Service . . . . p. 163 V The Normal Table of Xenophus laevis p. 163 g) Communications of the ,,Institut International d'Embryologie" (Embryological Section of the I.U.B.S.) p. 164 h) Rewiews of recently published textbook on embryology . . . p. 164 INTRODUCTION General set-up From several sides we received the suggestion that the General Embryo- logical Information Service should not be published annually because of the fact that only a part — about one third — of the subjects changes in the course of each year. One must, however, reahze that the new subjects reflect the actual progress in this field of science and that they are of particular interest for international cooperation. A biennial appearance has moreover the disadvantage that addresses may gradually get out of date. For these reasons we insisted up till now on pubhshing the G.E.I.S. annually. When, however, the majority of contributors and subscribers has the feehng that a biennial appearance of the G.E.I.S. will actually fulfil their desires and does not markedly interfere with the usefulness of the G.E.I.S., we are wilHng to meet this general demand. Since not only a survey of the current investigations but also other inter- national activities of the Hubrecht Laboratory find expression in the G.E.I.S., activities which would actually be affected adversely by a biennial appearance, we have the intention to publish a supplement to the preceding issue in the interjacent years. This supplement will contain the general announce- ments of the "Institut International d'Embryologie" and the Hubrecht Labo- ratory, the "Supply and Demand" Service for laboratory animals and the reviews of new textbooks in the field of embryology and in related fields. Thus we hope that these international activities of the Hubrecht Laboratory will develop normally. We have the pleasure to announce you that we hope to be able to offer this supplement free of charge to all the regular subscribers, the subscription fees for the G.E.I.S. being paid biennially with the appearance of each new issue. Consequently we intend to pubHsh the sixth issue not until 1955. We should, however, appreciate it very much to have your personal opinion about the question of an annual or biennial appearance of the G.E.I.S. We, there- fore, request you to fill in the attached slip for inquiry and send it us at your earliest convenience, so that we might still be able to publish the next issue in 1954, in case the majority of contributors and subscribers should express themselves in favour of an annual publication. We thank you in advance for your personal cooperation. Will you, please, keep us informed about changes in addresses and academic positions, so that no loss of addresses will occur in the rather long period between the appearance of two successive issues of the G.E.I.S. The sending 'in o[ data We ask your attention for the following points: 1 . We urgently request you to return forms before August 1st. Data received after November 1st cannot be included in the current issue. 2. A number of collaborators still send us bibliographical data about their recent publications. May we remind those that we only record current or planned investigations? 3. Collaborators working on the same subject are kindly reques- ted 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. — . W e want to bring to your special attention that sub- scriptions are supposed to run until further notice. We again ask your collaboration to reach those workers in the field of embryology (to be taken in its widest sense) who are not yet included in this issue. Will you please draw their attention to this Service and send us their addresses? General remarks The new activity of the Hubrecht Laboratory in the form, of the "Supply and Demand" Service for laboratory animals (see page 156) has met with considerable interest and has developed satisfactorily. We are now able to give you data from a dozen biological supply houses and from nearly two dozens of individual institutes. We hope that this service will markedly facilitate the acquisition of living material for scientific research. Since this service will be published annually we request you to send us supplementary data for 1954 in the course of the first half of the year. You will find a form folded in between the first pages of the chapter concerned (page 156). The last chapter containing reviews of new textbooks and of revised editions of older ones has been markedly extended, so that we expect that soon a more or less complete survey of new books in the field of embryology and in related fields may be found in this chapter. We decided that this chapter should at any rate be published annually in order to guarantee actuality of the reviews. P. D. NIEUWKOOP A 7 All LIST OF NAMES AND ADDRESSES with Subjects in Preparation (alpbabetical order) V^ ABELOOS, M. Prof. — Lab. de Zool. gener. dc la Fac. des Sci. et Stat, marine d'Endoume (Marseille), Place Victor Hugo, MARSEILLE, France a. Regeneration. (Polychaeta) ABERCROMBIE, M. M.A., B.Sc. — Dept of Embryol.. Univ. Coll. Lon- don, Gower St, 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, Miss E. C. B.A. — Harvard Univ. Med. School, Dept of Pathol., 25 Shattuck St, BOSTON 15, Mass., U.S.A. a. Development of ova from fertihzation to 14-days (first missed menstrual period). Homo (Primates) (in collaboration v/ith A. T. HERTIG, J. ROCK and W. J. MULLIGAN) 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) ADELMANN, 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 St, LONDON W.C. 1, England (U.K.) a. Experiments on regional determination. Gallus domesticus (Aves) AKESSON, B. Fil. mag. — Embryol. Dept, Zool. Inst, of the Univ. of Lund, LUND, Sweden a. Development of the larva. (Sipunculidae) ALBRIGHT, J. F. — Dept of Zool., Indiana Univ., BLOOMINGTON, Ind., U.S.A. a. Immunochemical and biochemical analysis of the development of the anterior pituitary. Gallus gallus (Aves) b. Analysis of the effects of adult or late embryonic tissue transplants on homologous tissues of the host embryo. Effects on synthesis of desoxyri- bosenucleic acid and proteins. Gallus gallus (Aves) (in collaboration with J. D. EBERT) 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) ALLANSON, Miss M. Ph.D. — Dept of Zool, King's Coll.. Strand, LON- DON, W.C. 2. England (U.K.) (no data received on Nov. V\ 1953) Alt 8 Asa ALTSCHUL. R. M.D., Prof. — Dept of Anat.. Univ. of Saskatchewan. SASKATOON. Canada a. Tissue culture. Influence of biostimulators on cell growth. AMANUMA, A. M.Sc. — Lab. Exper. Embryol., Inst, of Polytechn., Osaka City Univ.. Minami-Ogimati, Kita-ku, OSAKA, Japan a. The effect of X-ray irradiation upon the development of the gonad. Triturus pyrrhogaster (Urodela) AMPRINO. R. M. M.D., Prof. — Inst, of human Anat., Corso Massimo d'Azeglio 52, TORINO, Italy a. Qualitative and quantitative development of cornea and sclera following removal of parts of the eye anlage. Gallus domesticus (Aves) h. Regulative and regenerative capacities of the primary optic vesicle. Gallus domesticus (Aves) c. Effects of the removal of the anlage of the pineal body on the develop- ment. Gallus domesticus (Aves) ANCEL, P. A. F.I. I.E., Dr, Prof. (Honor., Emer.) — Inst, de Biol, physico- chimique, Fac. de Med., 13 Rue Pierre Curie. PARIS Ve, France — 61 Avenue Niel, PARIS, France (no data received on Nov. 1^', 1953) ANDERS. G. Dr Phil. — Zool.-vergl. Anat. Inst., Naturwiss. Fak., Univ. Zurich, Kiinstlergasse 16, ZURICH 6, Schweiz (no data received over some years) ANDRES, G. Dr — Max-Planck-Inst. fiir Biologie, Spemannstr. 34, TU- BINGEN, Wiirttemberg, Deutschland (no data received over some years) ANDREW. Miss A. B.Sc.Hons. — Dept of Zool., Univ. of the Witwaters- rand, Milner Park, JOHANNESBURG, South Africa a. Early embryology. Tatera brantsi (Rodentia) ANTON, H.-J. Dr — Zool. Inst, der Univ. Koln, Kerpenerstr. 13, KOLN- LINDENTHAL, Deutschland a. Die Regenerationsleistungen heteroplastischer Keimblattchimaren. Tritu- rus vulgaris, cristatus, alpestris (Urodela) b. Unvertraglichkeitsreaktionen bei heteroplastischen Transplantationen. Triturus vulgaris, cristatus, alpestris (Urodela) AOTO, T. Rigakushi (M.S.) — Zool. Inst., Fac. of Sci., Hokkaido Univ., North 8, West 5, SAPPORO. Japan (no data received on Nov. l-'^', 1953) ARlfiNS 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) 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) b. Immunological development. (Amphibia and Mammalia) ASAYAMA. S. M.Sc, Dr.Sc, Prof. — Lab. Exper. Embryol., Inst, of Poly- techn., Osaka City Univ., Minami-Ogimati, Kita-ku, OSAKA. Japan Asayama 9 Ba^ a. Effects of various proteinic and sterolic hormones upon the sex-dif- ferentiation of the gonad. Hynobius nebulosus (Schlegel) (Urodela) h. Histochemical study of gonadogenesis. Ttiturus pyrrhogaster (Boie) and Hynobius nebulosus (Schlegel) (Urodela) ASSENMACHER. I. Dr en Med. — Inst. d'Embryol., Fac. de Med., 1 Place de I'Hopital. STRASBOURG. 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 St and Amsterdam Ave, NEW YORK 33, N.Y., U.S.A. (no data received over some years) ATTARDO, Miss C. Dr — 1st. di Zool., Via Archirafi 18, PALERMO, Italia a. Xenoplastic gonad transplantations. (Amphibia) 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) h. Etude de I'hermaphroditisme. (Gastropoda) 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., Australia a. Investigation of fertihzation and segmentation by histochemical methods and with phase-contrast microscopy. Rattus rattus and Mus musculus (Rodentia) (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 Oryctolagus cuniculus (Lagomorpha) (in collaboration with A. W. H. BRADEN) c. Distribution and passage of sperms through female tract; significance of numbers. Rattus rattus (Rodentia), Oryctolagus cuniculus (Lago- morpha) and Ovis aries (Artiodactyla) (in collaboration with A. W. H. BRADEN) AVEL. M. F.I.I.E., Dr, Prof. — Fac. des Sci. de Bordeaux, 40 Rue La- martine. TALENCE (Gironde), France AVIS, F. R. A. B. Brown Univ. — Roscoe B. Jackson Memorial Lab., BAR HARBOR, Me. U.S.A. (no data received over some years) AXIANAS, L. — 1st. di Zool. e Anat. Comp. dell'Univ., Via A. Volta 4, PISA. Itaha a. Development of the gonads. Rana graeca (Anura) 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., Sweden (no data received on Nov. 1=', 1953) BAFFONI, G. M. Dr — Lab. di Istol. ed Embriol. della Fac. di Sci., Univ. di Roma, Via A. Borelli 50, ROMA, Itaha a. Growth and differentiation of the nervous cell. (Amphibia and Insecta) b. Action of hormones on gametogenesis. (Amphibia) BAGINSKI, S. M.D. — Inst, of Histol. & Embryol., Acad, of Med., Naru- towicza 60, LODZ, Poland a. Influence of sulphonamides on the size of embryos. Gallus (Aves) Bai 10 Barth BAIOCCHI, O. — Lab. d'Hormonol. et de Cytol., Ecole Pratique des Hautes Etudes. Hopital Broca, 111 Rue L. M. Nordmann. PARIS XII^, France a. Decoloration du dichlorophenol indophenol (DPIP) par I'ovocyte. Etude par micro-injection quantitative. Mas musciilus (Rodcntia) (en collaboration avec R. MORICARD et Miss M. M. C. S. GOTHIfi) 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) BALINSKY. B. L F.I.I.E.. Dr Biol.Sci. — Dept of Zool.. Univ. of the Wit- watersrand. Milner Park. JOHANNESBURG. South Africa a. The eye-lens correlation. Xenopus laevis, Bufo regularis, Bufo carens, Phrijnobatrachus natalensis, Pyxicephaliis delalandii, Pyxicephalus ad- spcrsiis (Anura) b. The development of the alimentary tract and its accessory parts. Xenopus laevis (Anura) (Normal Table) BALTZER. F. F.LLE.. Dr, Prof. — Zool. Inst, der Univ. Bern. Sahlistr. 8. BERN. Schweiz a. Entwicklung von Bastarden. Triton x Salamandra (Urodela), Para- centrotus und Psammechinus x Arbacia (Echinoidea) b. Chimaren. Triton x Bombinator (Amphibia) (in Zusammenarbeit mit H. EYMANN und W. HENZEN) c. Problem der Homologie. Chimaren (Amphibia) d. Entwicklung enucleirter Eier mit Blastulakernen. Triton (Urodela) (in Zusammenarbeit mit H. E. LEHMANN. Chapel Hill) BARIGOZZI. C. Dr Sci., Prof. Ord. Genet. — 1st. di Genet.. Via Celoria 10, Univ. di Milano. MILANO. Italia a. Development of tumours. (Urodela) b. Development of melanomes with different genotypes. Drosophila (Di- ptera) 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, South Africa a. Ontogenesis of the skull. Bu[o angusticeps (Anura) BARTELMEZ. G. W. Ph.D. — Dept of Embryol., Carnegie Inst, of Washington. Wolfe and Madison Sts. BALTIMORE 5, Md. U.S.A. a. Blood supply of uterus. Macaca mulatta (Primates) b. Early development of optic vesicle. Homo sapiens (Primates) c. Earliest development of oral hypophysis. (Primates) d. Effects of rubella on foetus. Homo sapiens (Primates) BARTH. L. G. F.I. I.E., Ph.D., Prof. — Dept of Zool.. Fac. of pure Sci., Columbia Univ.. Broadway and 166th St. NEW YORK 27. N.Y., U.S.A. a. Chemical embryology of the egg. (Amphibia) b. Determination of polarity. ( H ijdroidea and Ascidiae) BARTH. Mrs L. J. Ph.D. — Dept of Zool.. Fac. of pure Sci., Columbia Univ.. Broadway and 166th St. NEW YORK 27. N.Y.. U.S.A. a. Phosphate metabolism in the egg. Rana pipiens (Anura) Barthe 11 Bax BARTHELEMY, Miss A. — Lab. d'Histol.. Dep. d'Embryol.. Fac. de Med., 31 Rue Lionnois, NANCY (Meurthe & Moselle), France a. Structure du spermatozoi'de- au microscope optique et au microscope electronique. (Amphibia) (en collaboration avec A. DOLLANDER) BAST, T. H. Ph.D.. B.A., Prof. — Dept of Anat.. Univ. of Wisconsin. MADISON. Wis., U.S.A. a. Embryology and anatomy of the middle and internal ear. Homo (Primates) BATTAGLIA, B. Sc.D. — 1st. di Zool. e Anat. Comp., Fac. di Sci.. Via Loredan 6, PADOVA, Italia a. Cytochemical aspects of typical and atypical spermatogenesis. (Proso- branchiata. Gastropoda) 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 redo (Teleostei) b. 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. Kansas, U.S.A. a. Development of all systems in relation to behaviour. Opsanus tau (Teleostei) (in collaboration with H. C. TRACY and J. WINBLAD) b. Development of the gastro-intestinal tract in relationship to behaviour. Opsanus tau (Teleostei) c. Development of the skeletal, blood vascular, and muscular systems in relationship to behaviour. Opsanus tau (Teleostei) BAUD, C. A. Dr Med. — Inst. d'Anat., Fac. de Med., Univ. de Geneve, 20 Rue Ecole de Med., GENfiVE, Suisse a. Etude du debut de la formation des myofibrilles dans I'ebauche car- diaque. Gallus (Aves) BAUMANN, J. A. Dr, Prof. — Inst. d'Anat., Fac. de Med., Univ. de Geneve, 20 Rue Ecole de Med.. GENfiVE. Suisse a. Etude descriptive du developpement de I'innervation du coeur. Gallus (Aves) (en collaboration avec J. GALLERA) BAUTZMANN. H. Dr Med.. Prof. — Anat. Inst, der Univ. Hamburg, Schottmiillerstr. 1. HAMBURG 20. Deutschland a. Entwicklungsphysiologie der Primitiventwicklung. (Vertebrata, bes. Am- phibia) h. Entwicklung des lymphatischen Systems. (Vertebrata) c. Amnionentwicklung und Histologie. (^^zHebtata) BAXTER. E. W. B.Sc. — Biol. Dept. Guy's Hosp. Med. School, LONDON S.E. I.England (U.K.) a. Biology, including development and metamorphosis. Petromyzon (Cy- clostomata) b. Hybridisation experiments. Lampetra planed x Lampetra fluviatilis (Cy clostomata) c. Rearing of larvae in laboratory. Lampetra planed and Lampetra fluvia- tilis (Cyclostomata) Bca 12 ■ Benoit BEATTY. R. A. B.A., M.A.. Ph.D. — Inst, of Animal Genet.. Univ. Dept of Genet.. Kings Buildings. West Mains Rd, EDINBURGH 9. Scot- land (U.K.) a. Heteroploidy and parthenogenesis; egg transfer; operations on embryos. Mus musculus (Rodentia) and Lepus cuniculus (Lagomorpha) b. Breeding of genetically tagged strains for use in experimental embryo- logy. Lepus cuniculus (Lagomorpha) BEAU. A. A. Dr, Prof. — Lab. d'Anat.. Inst. Anat.. Fac. de Med.. 31 Rue Lionnois, NANCY (Mcurthe & Moselle), France a. Recherches sur le developpement des ligaments lateraux du genou. Homo (Primates) BECHT. G. M.Sc. — Physiol. Lab. of the Univ. of Amsterdam. Rapen- burgerstraat. AMSTERDAM. Holland a. Influence of duration and intensity of illumination on development. Xenopus laevis (Anura) BEENAKKERS. A. M. T. B.Sc. — Zool. Lab. der Rijks Univ.. Janskerk- hof 3. UTRECHT, Holland a. Analysis of head malformations caused by centrifuging the eggs. Limnaea -^tagnalis (Gastropoda) BeLANGER. L. F. Prof. — Dept of Histol., Fac. of Med., Univ. of Ottawa, OTTAWA. Quebec. Canada (no data received on Nov. 1", 1953) BELLAIRS— MORGAN. Mrs M. R. B.Sc. Ph.D. — Anat. School, Univ. of Cambridge, Downing Street. CAMBRIDGE. England (U.K.) a. Development of the foregut. Gallus domesticus (Aues) b. Mcrphogenetic movements and factors affecting them. Brachydanio rerio (Teleostei), Gallus domesticus (Aves) BELLANCA, Miss A. Dr — 1st. di Zool. e Anat. comp.. Via Universita 4. MODENA. Italia a. Activity of sexual hormones on the sexual differentiation of gonads and Bidder's organs in tadpoles. Rana dalmatina, Bufo bufo (Anura) BENAZZI. M. Prof. ord. — 1st. di Zool. e Anat. Comp. dell'Univ.. Via A. Volta 4. PISA, Itaha a. Fertihzation, pseudogamy, polyploidy and heredity. (Tricladida, Tur- bellaria) h. Hybrids. Triturus vulgaris x Tr. cristatus (Urodela) BENAZZI— LENTATI, Mrs G. Lib. Doc. — 1st. di Zool. e Anat. Comp. deirUniv., Via A. Volta 4, PISA. Itaha a. Ovo- and spermatogenesis; fertilization and cytology. (Tricladida, Tur- bellaria) BENGMARK. S. Med.kand. — Tornblad-Inst. of comp. Embryol., Biskops- gatan 7. LUND, Sweden (no data received on Nov. l^'. 1953) BENOIT, J. Dr en Med., Dr es Sci., Prof. — Lab. d'Histophysiol.. Coll. de France. Place Marcelin Berthelot, PARIS Ve, 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. Localisation des rayons X avec I'appareil Philips de contact: apphcation I a I'embryogenie. Salmo fario (Teleostei) ■ Ber 13 Biss BER, A. Dr, Prof. — Dept of Endocrinol., Fac. of Med., Acad, of Lodz, Nowotki 137, L(3D2, Poland (no embryo logical work in progress) BERG, W. E. A.B., M.S., Ph.D., Prof. — Dept of Zool., Univ. of Calif.. BERKELEY 4, Cal., U.S.A. a. Physiological studies of mosaic development. Metabolism of isolated blastomeres and polar lobes. Mytilus edulis (Lamellibranchia) BERGEIJK, W. A. van B.Sc. — Dept of Zool.. State Univ. of Iowa, IOWA CITY. Iowa, U.S.A. a. Physiology of the ear during larval, metamorphic and adult stages. (Amphibia) BERGQUIST, H. Ph.D. — Inst, of Anat.. Med. Fac. GOTHENBURG. Sweden (no data received on Nov. 1^', 1953) BERRILL. N. J. Ph.D.. D.Sc. Prof. — Dept of Zool.. McGill Univ., MONTREAL. Quebec, Canada (no data received over some years) BIER, K, Dr rer. nat. — Inst, fiir Angewandte Zool. der Univ., Naturw. Fak., Rontgenring 10, WtlRZBURG, Deutschland. a. Untersuchungen iiber das Schicksal des Polplasmas v/ahrend der Friih- embryogenese. Camponotus ligniperda, Formica rufa (Formicidae, Hy- menoptera) b. Entwicklung der larvalen Gonadcn. Formica rufa u.a. (Formicidae, Hy- menoptera) BIJTEL. Miss J. H. Dr Sc, M.D. — Anat.-Embryol. Lab. der Rijks Univ.. Oostersingel 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. Ambystoma 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 St, LONDON W.C. 1, England (U.K.) a. Development of capacity to respond to homologous antigens. Bos tautus ( Artiodactyla) and Mus musculus (Rodentia) BISHOP, D. W. Ph.D. — Dept of Embryol., Carnegie Inst, of Washington, Wolfe and Madison Sts, BALTIMORE 5. Md, U.S.A. a. Physiology and metabolism of spermatozoa. (Mammalia) h. Intra-tubal factors influencing sperm motihty and transport. (Mammalia) BISS, R. Dr en Med. — Lab. des Travaux Anat., Fac. de Med. Nouvelle, 43 Rue des St Peres, PARIS Vie, 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 col- laboration avec Ch. EYRIES) Biss M Bon c. Rhombomeric. Homo (Primates) (en collaboration avec Mrs M. BISS — BEZINEetCh. EYRIES) d. Originc du nerf pathetiquc. Homo (Primates) (en collaboration avec Mrs M. BISS— BEZINE ct Ch. EYRIES) BISS— BEZINE. Mrs M. Dr en Med. — Lab. des Travaux Anat.. Fac. dc Med. Nouvelle, 43 Rue des St Peres, PARIS Vie. France a. Rhombomeric. Homo (Primates) (en collaboration avec Ch. EYRIES etR. BISS) BLECHSCHMIDT. E. Dr Med., o.o. Prof. — Anat. Inst, der Univ., Burg- str. 51, GOTTINGEN, Deutschland a. Entwicklungsdynamik. 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 limb buds with special reference to the role played by the myotomes in the development of the musculature of the limbs. Ambystqma mex. (Uro- dela) 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) h. 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) BLUMENTHAL. Miss G. H. B.A., M.S. — Dept of Zool., Univ. of Cahf.. BERKELEY 4, Gal., U.S.A. a. Changes in DNA'se activity during development. Strongylocentrotus purpuratus (Echinoidea) 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, EDGEWOOD. Md. U.S.A. a. The humoral control of growth and metamorphosis, studied by trans- plantation and parabiosis experiments. Periplaneta americana (Or- thoptera) h. Physiological mechanism of hormone actions; the relations of hormones to fat. protein and carbohydrate metabolism. Periplaneta americana and Drosophila species (Insecta) c. The role of the prothoracic gland in postembryonic development. Peri- planeta americana (Orthoptera) BOEKE, J. F.I.I. E.. Dr. Prof. (Emer.) — Ramstraat 47. UTRECHT. Hol- land BOELL. E. J. Ph.D.; M.A.. D.Sc. — Osborn Zool. Lab.. Yale Univ., NEW HAVEN 11. Conn.. U.S.A. a. Enzyme development during growth and differentiation. (Amphibia) BON, W. F. M.Sc. — Anat.-Embryol. Inst., Municipal Univ. of Amster- dam. Mauritskade 61. AMSTERDAM O, Holland Bon 1 5 Bov a. Study about the properties of the eye-lens proteins in adults and embryos. (Amphibia), Gallus (Aves) (in collaboration with G. ten GATE and M. H. J. ZUIDWEG) BONDI, G. Dott. — 1st. di Biol, gen., Fac. di Med., S. Pietro, PERUGIA, Itaha a. Ricerche sperimentah sulla catalasi (ossifiro di Spirito). Biifo viridis e vulgaris (Anura) b. Rigenerazione ed azione del LiGl. Planaria nigra (Turbellaria) BONNER, J. T. Ph.D., Assoc. Prof. — Dept of Biol., Princeton Univ., PRINGETON, N. J.. U.S.A. a. Problems of morphogenetic movements and differentiation. Dictyostelium discoideum (Acrasiales) b. Development of surface structures. Euplotes eurystomus (Protozoa) BONIN, W. B.A., M.D., Prof. — Dept d'Histol. et d'Embryol.. Univ. de Montreal, 2900 Boulevard du Mont-Royal, MONTREAL, Ganada (no embryological work in progress) BOOKHOUT, G. G. A.B., M.A., Ph.D., Prof. — Dept of Zool., Duke Univ., DURHAM, N.G., U.S.A. a. The development from egg to pre-adult. Egg deposition, culture methods, day to day observations and records of living larvae and juveniles, study of fixed and sectioned material. Dasybranchus caducus (Polychaeta) b. 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, STOGKHOLM Va., Sweden (no data received on Nov. \^\ 1953) BOSE, A. M.Sc. — Gell Research Unit., Ghittaranjan Gancer Hospital, GALGUTTA 26, India a. Gytochemical studies of the radiation action on embryonic cells. Gallus (Aues) (in collaboration with S. MOOKERJEE) b. Localisation of the alkaline phosphatase in the development of the ver- tebral column. Gallus (Aves) BOSQUE, P. G. Dr Med., Prof.adj. — Anat. Inst, der Univ., Robert Koch- str. 6, MARBURG/Lahn, Deutschland a. Die Entwicklung des Truncus sympathicus und der praevertebralen Ganglien und deren Beziehung zu den Umbauprozessen des Intestinal- trakts wahrend der Metamorphose. Xeno'pus laevis (Anura) BOUIN. P. Dr, ProL (Emer.) — VENDRESSE, Ardennes, France BOUNOURE, L. Prof. — Inst, de Zool.. Lab. de Biol, gen., Fac. des Sci. de Strasbourg, 12 Rue de I'Universite, STRASBOURG, France a. Initial development: primordial germ-cells, development of the gonads. (Amphibia) B5VING, B. G. A.B., M.D. — Dept of Embryol., Garnegie Inst, of Washington, Wolfe and Madison Sts, BALTIMORE 5, Md, U.S.A. a. Blastocyst orientation and implantation mechanisms. Lepus cuniculus (Lagomorpha) b. Relation of trophoblast invasion to bloodvessels underlying uterine epi- thehum. Lepus cuniculus (Lagomorpha) Boyd 16 Briggs BOYD. J. D. M.A.. M.Sc. M.D., Prof. — Anat. School, Univ. of Cam- bridge. CAMBRIDGE. England (U.K.) a. Organogenesis. Homo (Primates) b. Placental development and structure. Homo (Primates) c. Development and distribution of pigment cells. Homo (Primates) BOYER, C. C. B.S.. M.A.. Ph.D., Prof. — Univ. of Alabama, Med. Center. BIRMINGHAM 5, Alabama. U.S.A. a. Development of central nervous system. Cricetus auratus (Rodentia) BRACHET. J. L. A. F.I. I.E., M.D., Prof. — Lab. de Morphol. anim., Univ. libre de Bruxelles. 1850 Chaussee de Wavre, BRUXELLES-Auderghem, Belgique a. Studies on the metaboHsm of lethal hybrids. (Amphibia) b. Cytochemical observations on the first developmental stages. (Amphibia) (in collaboration with J. J. PASTEELS) c. 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.. Austraha a. Investigation of fertihzation and segmentation by histochemical methods and with phase-contrast microscopy. Rattus rattus and Mus musculus (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 collaboration with C. R. AUSTIN) c. Distribution and passage of sperms through female tract; significance of numbers. Rattus rattus (Rodentia), Oryctolagus cuniculus (Lago-' morpha) and Ovis aties (Artiodactyla) (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 (Lagomorpha) BRANDT. W. M.D.. Ph.D. — Dept of Anat.. The Med. School, Birming- ham Univ., Edgbaston, BIRMINGHAM 15, England (U.K.) (no data received on Nov. 1*'. 1953) BRETSCHER. A. Dr Phil.nat. — Abt. fiir Zoophysiol.. Zool. Inst, der Univ.. Sahlistr. 8, BERN, Schweiz a. Development of the leg; Polydactyly. Gallus domesticus (Aves) b. Development of the leg; influence of colchicine. Gallus domesticus (Aves) c. Development of the leg; influence of the epidermis. Gallus domesticus (Aves) BRETSCHNEIDER. L. H. — Zool. Lab. der Rijks Univ.. 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 over some years) BRIGGS. R. W. Ph.D. — Lankenau Hospital Research Inst, and Inst, for Cancer Research. Burholme Ave. Fox Chase. PHILADELPHIA 11. Pa. U.S.A. Briggs 17 Butler 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 (no data received on Nov. 1=', 1953) 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.. Universitetsparken 3, COPENHAGEN 0, Denmark a. Regeneration problems. Spongilla (Porifera) b. Regeneration problems. Planaria (Turbellaria) BROOKBANK, J. W. B.A., M.S. — Dept of Embryol., Div. of Biol., Cahf. Inst, of Technol., PASADENA 4, Cal., U.S.A. a. Urease of developing embryos. Strongylocentrotus purpuratus (Echinoi- dea) BRUNER. Miss J. A. Ph.D. — Dept of Zool.. 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., Naturwiss. Fak.. Univ. Ziirich, Kiinstlergasse 16. ZQRICH 6. Schweiz (no data received over some years) BUNO, W. F.I.I.E.. B.S.. Ph.D.. Prof. — Dept de Histol. y Embriol.. Fac. de Med.. MONTEVIDEO. Urugay, S. America (no data received over some years) BURDON-JONES, C. B.Sc, Ph.D. — Dept of Zool., Univ. Coll. of North Wales. BANGOR, Caernarvonshire, 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 Sts. 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) b. A study of gonad modifications induced by hormones, and the reactions of the gonoducts and urogenital sinus to hormones. Didelphys virginiana (Marsupialia) BUSER— LAHAYE. Mrs J. Dr es Sci. — Lab. de Biol. Anim., Centre d'Etudes Sup. Sci.. Avenue Biarnay, RABAT, Maroc a. Regeneration des nageoirs. (Teleostei) 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) Butler 18 Cart b. Blastema formation and regeneration in limbs in which proximodistal polarity has been reversed. Ambystoma punctatum and Ambystoma opacnm (Urodcla) c. Regression (reduction) and subsequent reconstitution. Clavelina lepa- diformis (Tunicata, Urochordata) d. Effects of ultraviolet radiation on limb development and limb regene- ration. (Urodela) BUTROS. J. M.A.. Ph.D. — American Univ.. BEIRUT. Lebanon (no embryological work in progress) BUTZ. P. — Zool. Inst, der Univ.. Katharinenstr. 20. FREIBURG i. Brsg.. Deutschland a. Entwicklung der Sehleistung. (Lepidoptera; Culicidae, Diptera) (gemein- sam mit H. LODTKE) BYCZKOWSKA. Miss W. Mgr — Zaklad Anat. Porownawczej U. J. im H. Hoyera. sw. Anny 6, KRAKOW, Poland a. Proteolitic activity of the yolk sac cell, investigated by tissue culture method. Gallus (Aves) CAIRNS. J. M. A.B.. M.S., Ph.D.. Asst Prof. — Dept of Anatomy. School of Med., Univ. of Oklahoma. OKLAHOMA CITY. Okla., U.S.A. (no data received on Nov. 1"', 1953) CALLAN, H. G. M.A.. D.Sc. Prof. — Dept of Zool., The University, ST ANDREWS, Fife. Scotland (U.K.) (no data received on Nov. 1^'. 1953) CAMBAR, R. Dr — Lab. de Biol. Gen., Fac. des Sci. de Bordeaux, 40 Rue Lamartine, TALENCE (Gironde), France (Anura) a. Les facteurs de la morphogenese du mesonephros. Rana, Alytes, Xenopus h. Etude du developpement du systeme pronephretique. en particulier de I'uretere primaire. Rana, Alytes, Xenopus (Anura) c. Table chronologique du developpement normal. Rana, Alytes (Anura) d. Analyse experimentale des phenomenes de I'eclosion. (Anura) e. Developpement du systeme renal. Xenopus laeuis (Anura) (Normal Table) (en collaboration avec M. WILLIAUME) CAMPENHOUT. E. van F.I. I.E., Dr. Prof. — Inst. d'Anat., Univ. de Louvain. 38 Rue des Recollets, LOUVAIN, Belgique CARPENTER, Miss E. B.A., M.S., Ph.D. — Zool. Dept. Smith College, NORTHAMPTON. Mass.. U.S.A. (no data received on Nov. 1''. 1953) CARR. Miss E. B. (Mrs LAURENCE) B.Sc Ph. D. — Dept of Embryol.. Univ. Coll. London. Gower St, LONDON W.C. 1, England (U.K.) a. Embryonic and postnatal development. (Marsupialia and Eutherian Mammalia) CARRANO, Miss F. Dr — 1st. di Zool., Via Archirafi 18, PALERMO, Italia a. Xenoplastic chimaerae. (Amphibia) CARTER. T. C. Ph.D. — Med. Res. Council. Inst, of Animal Genet.. King's Buildings, West Mains Rd, EDINBURGH 9, Scotland (U.K.) a. Developmental study of a radial hemimelia mutant. Mus musculus (Ro- de ntia) b. Developmental study of the myelencephalic blebs mutant. Mus musculus (Rodentia) Case 19 Cent 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 over some years) CASPARI. E. W. Ph.D., Prof. — Dept of Biol.. Wesleyan Univ.. MID- DLETOWN, Conn., U.S.A. a. Development of eye pigmentation in wild type, aa and wa wa strains. Ephestia kuhniella (Lepidoptera) b. Development of tail 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. Petromyzon fluviatilis (Cyclostomata) b. 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 imaginal discs for the study of the compound eye for- mation. Drosophila (Diptera) b. Transplantation of eye discs between stocks with developmental abnor- malities of the eye. Drosophila (Diptera) c. Paper chromatography of mutants. Drosophila (Diptera) CASTRO, F. De F.I.I.E., Dr, Prof. — Instituto Cajal, MADRID, Spain CATE, G. ten M.D. — Anat.-Embryol. Inst., Municipal Univ. of Amster- dam, Mauritskade 61, AMSTERDAM O, Holland a. Study about the origin of the specific lens protein a-crystallin in develop- ment. (Amphibia), Gallus (Aves) (in collaboration with W. F. BON andM. H. J. ZUIDWEG) GATES, C. H. A.B. — Dept of Anat.. Med. School. Univ. of Kansas. LAWRENCE, Kansas. U.S.A. a. Comparative cell counts of cervical spinal ganglia and ventral horn on the normal side with the opposite where the anterior extremity failed to develop. Ovis aties ( Artiodactyla) 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., Dr hoa.causa: Bordeaux 1923, Tou- louse 1929, Prof. — Inst, de Histol. e Embriol., Fac. de Med., LISBOA, Portugal 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 (Anura) CENTAMORI, M. Dott. — 1st. di Biol, gen., Fac. di Med., S. Pietro, PERUGIA, Italia a. Comportamento degh acidi nucleinici in embrioni di vegetah. Lupinus albus (Leguminosae) b. Ricerche sull'ossiforo di spirito (catalasi) negli embrioni di uccelh. Gallus (Aves) (Leguminosae) c. Azione dei campi magnetici sugli embrioni di vegetali. Vicia [aba Chand 20 Cit CHANDEBOIS. Miss R. Lie. es Sci. — Lab. de Zool. gener. de la Fac. des Sci.. Place Victor Hugo, MARSEILLE, France a. Regeneration. Planaria (Turbellaria) CHANG, C. Y. M.S.. Ph.D. — Dept of Zool.. State Univ. of Iowa, IOWA CITY. Iowa. U.S.A. a. Sex determination by steroid hormones. (Anura) b. Parabiosis and sex differentiation. Xenopus (Anura) c. Inheritance of polymely. Bufo (Anura) d. Sex inheritance and differentiation. (Ranidae) CHANG, M. C. Ph.D. — Worcester Foundation for Exper. Biol., 222 Maple Ave. SHREWSBURY, Mass., U.S.A. (no data received on Nov. P', 1953) 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) h. 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.) (no data received on Nov. P«. 1953) CHENEY. R. H. B.S.. A.M.. S.M.. Sc.D.. Prof. — Dept of Biol.. Brooklyn Coll.. Bedford Ave and Ave H. BROOKLYN 10. N.Y.. U.S.A. a. Retardation effect of dimethylated xanthines on development. Arbacia punctulata (Echinoidea) h. Theophylline, theobromine, and caffeine effects on fecundity and deve- lopment. Rattus norvegicus (Rodentia) c. Effect of di- and trimethylated xanthines on root tip growth. Allium (Liliaceae) d. Effect of methylated xanthines on the oxygen consumption of the fer- tilized egg and early embryology. Arbacia punctulata (Echinoida) CHIRIBOGA, J. M.D. — Central de Investig., Minist. de Salud Publ. de la Nacion, Bolivar 1128, BUENOS AIRES, Argentina (no data received on Nov. 1^', 1953) CHUANG HSIAO HUI F.I.I.E., Drrer.nat.. Dr rer.nat.habil. — Lab. of Developm. Physiol.. Inst, of Exper. Biol.. Acad. Sinica, 865 Chang Ning Rd. SHANGHAI. China (no data received over some years) CHURCH. G. A.B. — Dept of Biol. Sci.. Stanford Univ., STANFORD, Cal., U.S.A. a. The growth of graft hybrids. (Amphibia) CIGADA, 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 Aves) CITTERIO, P. Grad.stud. — 1st. di Zool. e Anat. Comp., Univ. di Milano. Via Celoria 10, MILANO. Italia a. Determination in early development. (Echinodermata and Amphibia) Clan 21 Clel CLANCY, C. W. Assoc. Prof. — 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., Univ. of Pennsylvania. PHILADELPHIA 4. Pa. U.S.A. (no data received over some years) CLARK. H. B.A., Ph.D.. Prof. — Dept of Zool.. Univ. of Connecticut. STORRS. Conn.. U.S.A. a. Excretion in embryos. Coluber c. constrictor (Serpentes) b. Respiration in embryos. Coluber c. constrictor (Serpentes) c. Excretion in eirvbryos. Gallus domesticus (Aves) (in collaboration with D. FISCHER) d. Placental function. Thammophis s. sirtalis (Serpentes) (in collabora- tion with Miss B. HONIO) e. Factors affecting reaggregation of segregated cells in tissue culture, (in collaboration with J. E. SHANNON) CLAVERT. J. Dr en Med.. Dr cs Sci.. Prof. — Inst. d'Embryol.. Fac. de Med.. 1 Place de THopital. STRASBOURG, France a. Egg formation (Role of female hormone in vitcllogenesis). Columba. Anas and Gallus (Ares) CLAYTON— FREEDMAN. Mrs R. M. M.A. — Inst, of Animal Genet.. Univ. Dept of Genet., Kings 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 line by immunological and allied techniques: The loci pink eye. luxate, and agouti in CBA mice and albino in an inbred strain of this laboratory. Mus musculus (Rodcntia) c. Electron microscope study of cytoplasmic inclusions. (Amphibia) (in collaboration with G. G. SELMAN) d. Studies of differentiation by immunological and chromatographic tech- niques. Mus musculus (Rodcntia) CLEAT, N. D. B.Sc. — Dept of Genet.. The University. GLASGOW W. 2, Scotland (U.K.) a. Post-embryonic growth and development. Scheloribates laevigatus (Koch) (Acarina. Arachnoidea) CLEGG. E. J. M.B.. Ch.B. — Dept of Anat.. Umv. of Liverpool. LIVER- POOL. England (U.K.) a. The importance of the vascularization of the prostate and seminal vesicles for the viability of spermatozoa. (Mammalia) CLELAND. K. W. M.B., B.S. — Dept of Histol. and Embryol.. Univ. of Sydney. SYDNEY. N.S.W.. Austraha a. Carbohydrate metabolism and phosphorylation during fertilization and cleavage. Psammechinus miliaris. Echinus esculentus (Echinoidea); Gry- phea commercialis ( Lamellibranchiata) b. Effect of heavy metals on fertilization and cleavage. Psammechinus miliaris. Echinus esculentus (Echinoidea); Gryphea commercialis (Lamel- libranchiata) c. Physical changes in eggs during fertihzation and cleavage. Gryphea commercialis (Lamellibranchiata) Clem 22 Cop CLEMENT. A. C. Ph.D.. Prof. — Dept of Biol., Emory Univ.. ATLANTA, Ga, U.S.A. a. Localization of morphogenic factors: experimental analysis. Ilyanassa obsoleta (Gastropoda) COHEN. A. I. Ph.D. — Dept of Zool., Univ. of Cahf., BERKELEY 4. Cal.. U.S.A. a. Glycolysis in the early embryo. Rana pipiens (Anura) b. The metabohsm of enuclear cells. Rana pipiens (Anura) COHEN. P. — Anat.-Embryol. Inst.. Municipal Univ. of Amsterdam. Mau- ritskade 61. AMSTERDAM O. Holland a. Histochemical analysis of regenerating limbs and tails. (Urodela) (in collaboration with H. A. L. TRAMPUSCH) 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 (Ro- dentia), Gallus domesticus (Aves) h. Cytological, cytochemical and histochemical studies on the initiation of secretory activity in developing ectodermal glands. Mus musculus (Ro- dentia) COLOMBO. G. DrBiol.Sci. — 1st. di Zool. e Anat. Comp.. Fac. di Sci.. Via Loredan 6. PADOVA. Italia a. Chromosomes in early development. (Amphibia) h. Effects of hormones on cleavage and early development. (Amphibia) c. Gametogenesis. ( Arthropoda) COLWIN. A. L. Ph.D., Prof. — Dept of Biol.. Queens Coll.. Flushing 67, L.I.. NEW YORK. N.Y.. U.S.A. a. Fertilization reaction. Saccoglossus (Enteropneusta) (in collaboration withMrsL.H. COLWIN) b. Normal and experimental development. Saccoglossus (Enteropneusta) (in collaboration with Mrs L. H. COLWIN) c. Effect of certain chemicals on development. Mogula, dona 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) CONAWAY. C. H. — Dept of Anat.. Univ. of Wisconsin. MADISON. Wis., U.S.A. a. Development and morphology of the ovary. Talpidae (Insectivora) CONINCK. L. A. P. De Dr Sc. Prof. — Lab. voor Zool.. Afd. Morphol.. Universiteitstraat 14. GENT. Belgie (no data on Nov. 1='. 1953) t CONKLIN, E. G. Dr, Prof. (Emer.) — Princeton Univ., PRINCETON. N.J.. U.S.A. COPENHAVER. W. M. Dr. Prof. — Coll. of Physicians and Surgeons. Columbia Univ.. 632 West 168th St. NEW YORK City, N.Y., U.S.A. (no data received) Corde 23 Cour CORDEIRO, A. R. Dr — Lab. de Genet., Fac. de Filos., Avenida Joao Pesoa, PORTO ALEGRE, Brasil, S. America (no data received over some years) CORDIER. J. Dr, Prof. — Lab. d'Histol., Fac. de Med. de I'Univ.. 97 Rue aux Laines, BRUXELLES. Belgique a. Development of the skin and its sense organs, including histological study of the development of the chromatophores. Xenopus /aet-is (Anura) (Normal Table) CORLISS, C. E. B.S., M.S.. Ph.D. — Fac. of Biol., Med. Units Div., Univ. of Tennessee. MEMPHIS 3, Tenn., U.S.A. a. Study of mitotic activity and its relation to morphogenesis in young embryos. Mas norvegicus albinus (Rodentia) dentia) h. Colchicine toxicity to embryonic tissue. Mus norvegicus albinus (Ro- CORNER, G. W. F.I.I.E., A.B., M.D., D.Sc. Prof. — Dept of Embryol., Carnegie Inst, of Washington, Wolfe and Madison Sts, BALTIMORE 5. Md, U.S.A. a. Histology of uterus and ovaries in reproductive cycle. Chiefly Macacus rhesus (Primates) b. Physiology of uterine muscle. (Mammalia) c. Uterine innervation. Oryctolagus cuniculus and other laboratory ani- mals (Mammalia) d. Intravital staining, trypan blue. COSTELLO, D. P. F.I.I.E.. Ph.D., Prof. — Dept of Zool., Univ. of North Carolina, CHAPEL HILL. N.C., U.S.A. a. Effects of radio-isotopes on mitosis. Ambystoma maculatum (Urodela) and Chaetopterus pergamentaceus (Annelida) (in collaboration with Miss C. HENLEY and D. E. KENT) COTRONEI, G. F.I. I.E., Dott.. Prof. — 1st. di Anat. Comp. deH'Univ.. Fac. di Sci.. Via Borelh 50, ROMA. ItaUa a. Risultati sperimentah e problemi sui trapianti, espianti, parabiosi xeno- plastiche. (Amphibia) COULOMBRE. A. J. B.S.. M.S. — Dept of Biol.. The Johns Hopkins Univ.. Charles and 34th Sts. BALTIMORE 18. Md, U.S.A. a. Growth, histogenesis and developmental chemistry of the retina. Gallus domesticus (Aves) b. The interrelationships of the pigmented coat and the visual retina during development. Gallus domesticus (Aves) COUNCE, Miss S. J. B.A.. M.A. — Inst, of Animal Genet., Univ. Dept of Genet., King's Buildings, West Mains Rd. EDINGBURGH 9, Scot- land (U.K.) a. Effect of three rudimentary alleles, fused. Lyra and deep orange, on embryonic dev>'Iopment. Drosophila melanogaster (Diptera) h. Effect of ultra-sonic treatment on embryonic development. Drosophila (Diptera) (in collaboration with G. G. SELMAN) c. Egg development in the ovaries of female steriles. Drosophila (Diptera) b. Biochemistry of the myometrium. (Mammalia) collaboration with D. A. EDE — Photography by E. C. A. LUCEY) COURRIER. R. Prof. — Lab. de Morphol. exper. et Endrocrinol.. Coll. de France. Place Marcelin Berthelot. PARIS Ve, France (no data received over some years) Cra 24 Dam CRARY. D. D. — Roscoc B. Jackson Memorial Lab.. Box 558. BAR HAR- BOR. Me. U.S.A. (no data received over some years) 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. Trititrus 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) CRESP, J. Lie. es Sci. — Lab. de Zool. gener. de la Fac. des Sci.. Place Victor Hugo. MARSEILLE. France a. Regeneration. Serpulidae (Polychaeta) CREUTZBERG. F. B.Sc. — Zool. Lab. der Rijks Univ., Janskerkhof 3. UTRECHT. Holland a. Exogastrulation produced by potassium chloride. Limnaca stagnalis (Gastropoda) CRISP. D. J. Ph.D. — Marine Biol. Stat.. Univ. Coll. of N. Wales. BAN- GOR. N. Wales (U.K.) a. Breeding and development. Balanus hameri. B. porcatus, Chthamalus stellatus (British Cirripedia) CROWELL, P. S. — Dept of Zool., Indiana Univ.. BLOOMINGTON. Ind.. U.S.A. a. Experimental analysis of morphogenesis. C amp anul aria (Cord^jlophora, Hydractinia) CSAPO, A. I. M.D. — Dept of Embryol.. Carnegie Inst, of Washington. Wolfe and Madison Sts, BALTIMORE 5, Md, U.S.A. a. Physiology of uterine muscle, including developmental physiology. Sus scro[a and Lepus cuniculus (Mammalia) b. Biochemistry of the myometrium. (Mammalia) c. Energetics of the myometrium. (Mammalia) d. The mechanism of estrogen and progesterone effect. (Mammalia) e. Technical considerations concerning uterine pharmacology. (Mammalia) i. The maintenance of pregnancy and its disorders. (Mammalia) CZAPIK. Miss A. D.Sc. — Zool. Dept of the Jagellonian Univ., St Anne 6. KRAKOW. Poland (no data received on Nov. 1^', 1953) DAINTY. }. M.A. — Inst, of Animal Genet., Univ. Dept of Genet.. King's Buildings, West Mains Rd. EDINBURGH 9. Scotland (U.K.) a. Physical aspects of growth and development. DALCQ. A. M. F.I.I.E.. M.D.. Prof. — Lab. d'Anat. et d'Embryol.. Fac. de Med. de I'Univ., 97 Rue aux Laines. BRUXELLES. Belgique (no data received on Nov. 1". 1953) DALTON. H. C. Ph.D., Assoc. 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., Prof. — Inst, de Zool. Ed. Van Benedcn. Dept Morphol. des Chordes. Fac. des Sci.. 22 Quai Ed. Van Beneden, LIfiGE, Belgique Da mas 25 Del a. Etude descriptive et comparative du developpement. Petromyzon marinus, Lampetra fluviatilis et L. planeri (Cyclostomata) DAN, Mrs J. C. Ph.D. — Embryol. Section. Dept of Biol., Tokyo Metro- politan Univ., Setagaya-ku, TOKYO, Japan a. Electron-microscope observation of spermatozoa under various experi- mental conditions. ( Echinodermata, Mollusca and Annelida) DAN, K. Ph.D. (Rigakuhakushi), Prof. — Embryol. Section, Dept of Biol.. Fac. of Sci., Tokyo Metropolitan University, Setagaya-ku, TOKYO, Japan a. Research into causes of form change in early development, from pre- cleavage through metamorphosis. (Echinoidea) h. Birefringence studies of dividing eggs. (Echinoidea) c. Mitotic spindle isolation and analyse. (Echinoidea) d. Culture of neuroblasts. Mitosis. Species undecided (Orthoptera) D'ANCONA, U. Prof. — 1st. di Zool. e Anat. Comp., Fac. di Sci., Via Loredan 6, PADOVA, Italia a. Differentiation of the gonad. (Vertebrata, esp. Pisces) h. Embryology. (Teleostei, Ganoidea and Amphibia) DANKMEIJER, J. Med. Dr, Prof. — Anat.-Embryol. Lab. of the Univ. of Leyden, Fac. of Med., Wassenaarseweg, Boerhaavekwartier, LEI- DEN, Holland a. Normal and abnormal development of the heart. Homo and other Ani' malia (in collaboration with J. A. LOS) b. Development of thyroid gland and teeth (investigations with radioactive isotopes) c. Development of uterus. Homo (Primates) (in collaboration with Miss A. DEKKER) d. Heart and vessels in congenital malformations. Homo (Primates) (in collaboration with H. A. SNELLEN) DAVIES, D. H. M.Sc. — Division of Fisheries, Beach Road, Sea Point, CAPE TOWN, South Africa a. Embryology. Sardinops ocellata (Pappe) (Isospondyli, Neopterygii) 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.) DE, P. M.B.B.S. — Cell Research Unit., Chittaranjan Cancer Hospital, CALCUTTA 26, India a. Cell-chemistry of normal and carcinomatous cells. Homo (Primates) (in collaboration with S. MOOKERJEE) DE CESARE, Miss. I. Ph.D. — 1st. di Anat. Comp.. Via Bclmeloro 8, BOLOGNA (103). Italia a. Action of antimitotics on early development. (Amphibia) (in collabo- ration with P. PASQUINI) DEKKER. Miss A. Physician — Anat.-Embryol. Lab. of the Univ.. Fac. of Med.. Wassenaarseweg. Boerhaavekwartier. LEIDEN. Holland a. Development of the uterus. Homo (Primates) (in collaboration with J. DANKMEIJER) DELMAS. A. Prof. Agr. — Lab. des Travaux Anat.. Fac. de Med. Nou- velle. 43 Rue des St Peres, PARIS Vie, France Delmas 26 Dodd a. Developpement de I'encephale. Homo (Primates) h. Developpement anormal de I'encephale et des organes dcs sens. Mus rattus (Rodentia) DENT. J. N. A.B.. Ph.D.. Assoc. Prof. — Samuel Miller Biol. Labs. Univ. of Virginia, CHARLOTTESVILLE, Va, U.S.A. a. Uptake of certain radioisotopes by various embryonic regions. Rana pipiens (Anura) DENUCfi, J. M. Lic.zool.sci. — Lab. voor Zool.. Afd. Morphol., Universi- teitstraat 14, GENT. Belgie (no data received on Nov. 1^'. 1953) DEROUX, G. Lic.esSci. — Lab. d'Embryogenie comp.. Coll. de France. Place Marcelin Berthelot. PARIS Ve, France (no data received over some years) t DESCLAUX. P. Prof.agr. — Lab. d'Embryol.. Fac. de Med.. 15 Rue Ecole de Med.. PARIS Vie, France DETWILER, S. R. Dr, Prof. — Dept of Anat.. Coll of Physicians and Surgeons. Columbia Univ.. 630 West 168th St, NEW YORK City. N.Y.. U.S.A. (no data received) DEUCHAR. Miss E. M. M.A.. Ph.D. — Dept of Embryol., Univ. Coll. London. Gower St, LONDON W.C. 1. England (U.K.) a. Studies on amino acid composition of embryonic tissues. Xenopus laevis, Discoglossus pictus, Ambystoma tigrinum (Amphibia) b. Attempted detection and identification of diffusible secretions from organizer tissue. Xenopus laevis, Discoglossus pictus. Ambystoma ti- grinum (Amphibia) DEVILLERS. Ch. Dr es Sci. — Lab. d'Embryogenie comp.. Coll. de France, Place Marcelin Berthelot. PARIS Ve. France (no data received over some years) DIDING. S. Fil. Lie. — 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 (no data received on Nov. 1^', 1953) DIJK, D. E. van B.Sc.Hon. (Zool.) — Zool. Inst.. Univ. of Stellenbosch, STELLENBOSCH. South Africa a. Ontogenesis of the cloaca. (Anura) DINGER. Miss C. B.Sc. — Zool. Lab. der Rijks Univ., Janskerkhof 3. UTRECHT. Holland a. Analysis of lithium action. Limnaea stagnalis (Gastropoda) (in colla- boration with W. J. van DONGEN, B. de GROOT. Miss H. E. van HEYNINGEN. C. R. JANSSEN and Chr. P. RAVEN) DODD. J. M. B.Sc, Ph.D. — Gatty Marine Lab., ST ANDREWS. Fife, Scotland (U.K.) a. Embryology with special reference to hybridisation. Patella vulgata, athletica and intermedia (Prosobranchia, Gastropoda) b. A study of the developmental abnormalities wich result from: 1. poly- spermy, 2. unripeness of the genital products. Patella vulgata, athletica and intermedia, and Patella pellucida (Prosobranchia. Gastropoda) Doh 27 Dos DOHRN, P. M.D., Ph.D. — Zool. Station. NAPLES, Italy (no data received on Nov. l'\ 1953) DOHRN. R. Dr. Prof. — Zool. Station. NAPLES, Italy (no data received) DOKTER, H. Med.Drs — Hubrecht Lab., Intemat. Embryol. Inst., Jans- kerkhof 2. UTRECHT. Holland — Anat.-Embryol. Lab.. Free Univ.. Pr. Hendriklaan 27, AMSTER- DAM Z, Holland a. Homogenetic activation of competent ectoderm through neural tissue in explants. (Urodela) b. Neural activation and transformation in the ectoderm around Hensen's node. Gallus domesticus (Aves) DOLLANDER. A. Dr. Agrege — Lab. d'Histol.. Dep. d'Embryol., Fac. de Med., 31 Rue Lionnois. NANCY (Meurthe & Moselle), France a. Etude des proprietes mecaniques des differents elements du cortex de I'oeuf. (Amphibia) (en collaboration avec Miss F. VIVIER) b. Regulation de I'oeuf. (Amphibia) c. Etude des proprietes de permeabihte du cortex de I'oeuf. (Amphibia) (en collaboration avec P. J. MELNOTTE) d. Etude morphologique du cortex de I'oeuf au microscope optique et au microscope electronique. Triturus alpestris (Amphibia) e. Structure du spermatozoide au microscope optique et au microscope electronique. Triturus, Pleurodeles (Amphibia) (en collaboration avec Miss A. BARTHELEMY) f Action teratogene de I'uree. (Amphibia) (en collaboration avec R. MAR- CONNET) g. Action de certaines substances chimiques sur les mouvements ciUaires et sur la motihte du spermatozoide. (Amphibia) (en collaboration avec J. LOSSEROY) 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. W. J. van B.Sc. — Zool. Lab. der Rijks Univ.. Janskerkhof 3, UTRECHT. Holland a. Analysis of lithium action. Limnaea stagnalis (Gastropoda) (in collabo- ration with Miss C. DINGER, B. de GROOT. Miss H. E. van HEY- NINGEN. C. R. JANSSEN and Chr. P. RAVEN) DORP van VLIET. N.O. van B.Sc. — Zool. Lab. der Rijks Univ.. Janskerk- hof 3. UTRECHT. Holland a. Depolarization of the egg by calcium chloride. Limnaea stagnalis (Gas- tropoda) DOSSEL. W. E. A.B.. M.S. — Dept of Biol., The Johns Hopkins Univ.. Charles and 34th Sts, BALTIMORE 18. Md. U.S.A. a. Correlated cytological and physiological studies on the developing thyroids of normal and decapitated embryos. Gallus domesticus (various varieties) (Aves) b. Ontogeny of pigment-forming enzyme systems in the skin. Gallus do- mesticus (various varieties) (Aves), Rattus norvegicus (albino and hooded) (Rodentia), Mus musculus (c-57 and albino) (Rodentia) Drei 28 Eb DREISCHER. Miss H. Cand.rer.nat. — Zoo). Inst, der Univ., Katharinen- str. 20. FREIBURG i. Brsg., Deutschland a. Eibildung bei Arbeiterinnen (Drohnenmiitterchen). Apis mellifica (Hy' menoptera) (gemeinsam mit M. SCHNETTER) DREYER. Miss M. V. B.Sc. — Dept of Zool.. Univ. of O.F.S.. BLOEM- FONTEIN. South Africa a. The epitheho-neural bodies. Gallus bankiva (Aves) DUFFEY, L. M. — Dept of Zool.. Indiana Univ., BLOOMINGTON. Ind., U.S.A. a. Physiology of development of the heart of the early embryo. Gallus gal- lus (Aves) DURANTE, Miss M. Dr — 1st. di Zool., Via Archirafi 18. PALERMO, Italia a. Xenoplastic gill transplantations. (Amphibia) h. Xenoplastic limb transplantations. (Amphibia) DUSHANE. G. Ph.D. Yale 1934, Prof. — Dept of Biol.," Stanford Univ., PALO ALTO, Gal.. 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) h. Pigmentary relations in transplantations between white and black ani- mals. 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) h. Development of paraphysis cerebri. Xenopus laevis (Anura) EAKIN, R. M. F.I. I.E., A.B.. Ph.D., Prof. — Dept of Zool., Univ of Cahfornia. BERKELEY 4. Gal., U.S.A. a. Development of the pituitary. Study of independent or dependent dif- ferentiation of the partes buccales and pars nervosa of the pituitary. Hyla regilla (Anura) EALES. Miss N. B. D.Sc. (London) — Dept of Zool., University, REA- DING. Berkshire. England (U.K.) a. Foetal anatomy. Monodon monoceros (Odontoceti. Cctacea) EAYRS. J. T. B.Sc. Ph.D. — Dept of Anat., The Med. School. Birmingham Univ.. Edgbaston. BIRMINGHAM 15. England (U.K.) (no data received on Nov. 1"', 1953) EBERT, J. D. Ph.D., Asst Prof. — Dept of Zool.. Indiana Univ., BLOO- MINGTON, Ind., U.S.A. a. Biochemical and immunochemical analysis of the synthesis and distri- bution of the contractile proteins, actin and myosin, in the development of the heart in the early embryo. Gallus gallus (Aves) (in collaboration withR. TOLMAN) b. Immunological studies of melanogenesis; immunochemical properties of the melanins, melanoproteins. The chemistry of the pigment-forming area in the early embryo. Gallus gallus (Aves) c. Analysis of the effects of adult or late embryonic tissue transplants on homologous tissues of the host embryo. Gallus gallus (Aves) 1. Effects on synthesis of desoxyribosenucleic acid and proteins, (in collaboration with J. F. ALBRIGHT) Ebert 29 El Sh 2. Selective transfer of radioactivity from grafts to homologous host tis- sues, (in collaboration with A. M. MUN) EDDS, Jr, M. V. B.A., M.A., Ph.D. — Arnold Biol. Lab., Brown Univ., PROVIDENCE 12, R.I.. U.S.A. a. Study of factors influencing the collateral regeneration of intact axons in partially denervated muscles. Mus 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., University Dept of Genetics, King's Buildings, West Mains Rd, EDINBURGH 9, Scot- land (U.K.) a. Study of the developmental effects of embryonic lethal mutations. Drosophila melanogaster (Diptera) b. Film: Embryonic development. Drosophila melanogaster (Diptera) (in collaboration with Miss S. J. COUNCE — Photography by E. C. A. LUCEY) EDGAR, G. W. F. Physician — Anat.-Embryol. Lab. der Rijks Univ., Janskerkhof 3, UTRECHT, Holland a. Investigations into the hpid changes in the central nervous system of the growing animal, compared with the normal and pathological develop- ment 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) EDWARDS. R. G. B.Sc.Agric. B.Sc.Zool., Dip.Genet. — Inst, of Animal Genet., Univ. Dept of Genet., King's Buildings, West Mains Rd, EDINBURGH 9, Scotland (U.K.) a. Heteroploidy and parthenogenesis, operations on embryos. Mus musculus (Rodentia) and Lepus cuniculus (Lagomorpha) EEDEN, J. A. van Dr — Dept of Zool.. Potchefstroom Univ., POTCHEF- STROOM. South Africa a. Ontogenesis of the skull and visceral muscles till the beginning of meta- morphosis. Xenopus /aei^fs (Anura) (Normal Table) EGMOND, Miss M. T. C. van M.Sc. — Hubrecht Lab., Internat. Embryol. Inst., Janskerkhof 2. UTRECHT. Holland a. Analysis of the autonomous (intrinsic) and dependent aspects in the development of organization patterns in the anterior portion of the nervous system. (Urodela and Anura) b. The development of the ear. Xenopus laevis (Anura) (Normal Table) ELBERS, P. F. M.Sc. — Zool. Lab. der Rijks Univ., Janskerkhof 3, UTRECHT, Holland a. 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) EL SHATOURY. H. B.Sc.Hon. (Cairo) — Inst, of Animal Genet.. Univ. Dept of Genet., King's Buildings, West Mains Rd, EDINBURGH 9, Scotland (U.K.) El Shatoury 30 Eyr a. Survey of pupal lethals. Drosophila melanogaster (Diptera) b. Biological nature of neoplasms, Drosophila antibodies. Drosophila me- lanogaster (Diptera) c. Post-embryonic development and behaviour of the blood-forming organs. Drosophila melanogaster (Diptera) d. Application of immune reactions to determine invisible changes in non- metamorphic structures. Drosophila melanogaster (Diptera) e. Gastric tumours and their relation to hormonal disturbances. Drosophila melanogaster (Diptera) i. The growth- and moulting hormone. Drosophila melanogaster (Diptera) ELSHOUT. Miss A. M. Med.Dr. — Anat.-Embryol. Lab. of the Univ. of Leyden, Fac. of Med.. Wassenaarseweg, Boerhaavekwartier, LEI- DEN. Holland (during the year 1952/'53 working in the U.S.A.) ENDO, Y. M.Sc. — Biol. Lab., Keio Univ., Hiyoshi, Kohoku, YOKO- HAMA, Japan a. A chemical study of the processes of fertilization membrane formation. (Echinoidea) b. Electron microscopical study of the fertilization membrane. (Echinoidea) ENGELBRECHT, D. van Z. M.Sc. — Zool. Inst., Univ. of Stellenbosch. STELLENBOSCH. South Africa a. Cranial ontogenesis. Pyromelana sp. (Aves) ENGLANDER, H. Dr med. et rer.nat. — Zool. Inst, der Univ. Koln, Kerpenerstr. 13. KoLN-LINDENTHAL. Deutschland a. Regionalspezifische Induktion. (Urodela) EREN(^IN, Z. Med.Veter.Dr — Inst, of Histol. and Embryol., Veterinary Coll. of the Univ., ANKARA, Turkey a. Spermiogenesis by the hypervitaminosis E. ERKEL. G. A. van B.Sc. — Zool. Lab. der Rijks Univ., Janskerkhof 3, UTRECHT. Holland a. Influence of heat shock. Limnaea stagnalis (Gastropoda) (in collabora- tion with A. C. de ROON and A. M. STADHOUDERS) 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— GILADI. Mrs H. M.Sc. Ph.D. — Hebrew Univ., JERUSALEM, Israel — Hubrecht Lab., Internat. Embryol. Inst., Janskerkhof 2, UTRECHT, Holland (until October 1953) a. Dynamic aspects of neural induction. (Amphibia) EYMANN, H. — Zool. Inst, der Univ. Bern, Sahlistr. 8, BERN. Schweiz a. Neuralchimiiren. Triton x Bombinator (Amphibia) (in Zusammenarbeit mitP. BALTZER) EYRIES, Ch. Dr en Med. — Lab. des Travaux Anat.. Fac. de Med. Nou- velle. 43 Rue des St Peres. PARIS Vie. France a. Developpement de I'encephale et des nerfs craniens. Homo (Primates) (en collaboration avec R. BISS) b. Oreille interne et complexe acoustico-facial. Homo (Primates) (en col- laboration avec R. BISS) Eyries 31 Feld c. Rhombomerie. Homo (Primates) (en collaboration avec M. BISS — BEZINEetR. BISS) d. Origine du nerf pathetique. Homo (Primates) (en collaboration avec M. BISS— BEZINE et R. BISS) FAASSEN, F. van — Anat.-Embryol. Lab., Free Univ., Pr. Hendriklaan 27, AMSTERDAM Z, Holland a. Teratogenetic effect of thyreoectomised pregnant animals on the deve- loping embryo. Rattus norvegicus albinus (Rodentia) (in collaboration withj. LANGMAN) FABER, J. B.Sc. — Hubrecht Lab., Internat. Embryol. Inst., Janskerkhof 2, UTRECHT, Holland — Lab. for Comp. Physiol., State Univ. of Utrecht, Jan van Galenstr. 17, UTRECHT. Holland a. Preparing the catalogue of the Central Embryological Collection of slides and ale. material of the Hubrecht Laboratory. (Anura) b. Development of behaviour. Triturus taeniatus, Ambystoma mexicanum (Uvodela) 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 fertilized eggs, and of parthenogenetic cleavage induced by heat and cold treatment of unfertilized eggs. Triturus viridescens (Urodela) b. Study of effects of triploidy on development of gonads. Triturus viri- descens (Urodela) 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. Triturus viridescens, Eurycea bislineata (Urodela) e. Study of progeny of triploid, tetraploid and other heteroploid individuals; their chromosome number, mortality, pathology etc. Ambystoma mexi- canum (Urodela) (in collaboration with R. R. HUMPHREY) f. Studies on spontaneous haploidy and polyploidy. Ambystoma mexicanum (Urodela) (in collaboration with R. R. HUMPHREY) FARINELLA— FERRUZZA, Mrs N. Dr — 1st. di Zool., Via Archirafi 18, PALERMO, Italia a. Xenoplastic tail transplantations. (Amphibia) FAURE FREMIET, E. F.I.I.E.. Dr, Prof. — Coll. de France. Place Mar- cehn Bertheiot, PARIS Ve, France (no data received) FAUTREZ, J. C. M.D., Prof., Member of the Royal Flemish Acad, of Sci. — Lab. of Anat.. Fac. of Med.. Univ. of Gent. Bylokekaai 1, GENT, Belgium a. Histophotometrical studies of DNA content in germs and tissues. FAUTREZ— FIRLEFYN. Mrs N. J. — Lab. of Anat., Fac. of Med., Univ. of Gent, Bylokekaai 1, GENT, Belgium a. Cytochemical studies of embryonic development. Artemia salina (Crus- tacea) FELDMAN, M. M.Sc, Ph.D. — Inst, of Animal Genet., Univ. Dept of Genet., King's Buildings, West Mains Rd, EDINBURGH 9. Scotland (U.K.) — Dept of Zool, The Hebrew Univ., JERUSALEM, Israel Feldman 32 Pons a. Study on disaggregated cells of embryos. Triton (Utodela) 1. The development of a tissue specific adhesiveness after reaggre- 2. Processes of induction in reaggregated cells. gation. FELL Miss H. B. F.I. I.E.. Dr — Strangcways Research Lab.. Wort's Causeway. CAMBRIDGE. England (U.K.) (no data received on Nov. 1"'. 1953) FEREMUTSCH. K. Dr Med. — Hirnanat. Inst, der Psychiatr. Univ. klinik. Med. Fak.. Waldau. BERN. Schweiz a. Endhirncntwicklung. speziell der Rinde und Bauplan. Mus (Rodentia), Homo (Primates) h. Comparative development of the brain. Cricetus auratus (Rodentia) (in collaboration with F. STRAUSS) FERRIS. W. R. — Dept of Zool.. Univ. of Chicago, CHICAGO 37, 111., a. Elcctronmicroscopy. U.S.A. FICQ, Mrs A. A. Lie. en Sci. Biol. — Lab. de Morphol. anim., Univ. libre de Bruxelles. 1850 Chaussee de Wavre. BRUXELLES-Auderghem. Belgique a. Application d'une methode autoradiographique par irradation neutroni- que, au dosage et a la localisation du Lithium dans des embryons. Am- bystoma. Pleurodeles (Urodela) h. Application d'une methode autoradiographique a I'etude du phenomene d'induction. Ambystoma, Pleurodeles. Rana (Amphibia) FILOGAMO. G. Dr — Inst, of human Anat.. Corso Massimo d'Azeglio 52, TORINO. Italy a. Histo- and organotypical growth of the embryonic liver in vitro. Gallus domesticus (Aves) FISCHBERG. M. Dr Phil. (Zurich), M.A. (Oxford) — Dept of Zool. and Comp. Anat.. Univ. Museum, OXFORD, England (U.K.) (no data received on Nov. 1**, 1953) FISCHER. D. — Dept of Zool.. Univ. of Connecticut, STORRS, Conn.. U.S.A. a. Excretion in embryos. Gallus domesticus (Aves) (in collaboration with H.CLARK) FISK. A. M.Sc. — St Mary's Hosp.. Med. School. Norfolk Place, Padding- ton. LONDON W. 2, England (U.K.) (no data received over some years) 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 thermo-regula- tory mechanisms. Mus musculus (Rodentia) b. Metabolic characteristics of the neonatal period. Mus musculus (Ro- dentia) FLEXNER. L. B. B.S.. M.D.. Prof. — Dept of Anat., Univ. of Penn- sylvania. School of Med.. PHILADELPHIA 4, Pa, U.S.A. a. Enzyme activities in fetal liver and cerebral cortex. Cauia cobaya (Ro- dentia) b. Placental transfer using radioisotopes. Cauia cobaya (Rodentia) FONSECA SACARRAO. G. da Dr Sc. — Museu e Lab. Zool. d. Fac. d. Ci.. Univ. d. Lisboa, LISBOA, Portugal (no cmbryological work in progress for 1953) Font 33 Froud FONTANA, J. S. — Central de Investig., Minist. de Salud Publ. de la Nacion. Bolivar 1128, BUENOS AIRES, Argentina (no data received on Nov. 1=', 1953) FORD, P. B.Sc, Ph.D.(Lond.), F.R.S.C., Prof. — Dept of Zool., Univ. of British Columbia. VANCOUVER, B.C., Canada a. A study of nucleic acids in the blastoderm. Gallus domesticus (Aves) b. The morphogenesis of the gastric gland. Castor canadensis Kuhl (Ro- dentia) c. The development of the pronephros. Onchorynchus sp. (Aves) FOX. H. B.Sc, Ph.D. — Dept of Zool. and Comp. Anat.. Univ. Coll. London, Cower St. LONDON W.C. 1, England (U.K.) (no data received on Nov. 1"'. 1953) 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 (Artiodactyla) (in collaboration with F. DAVIES, Dept of Anat.) FRAN(^OIS, Y. Lie es Sci. — Lab. d'Embryogenie comp., Coll. de France, Place Marcelin Berthelot, PARIS Ve, France (no data received over some years) FRANK. G. H. M.Sc — Zool. Inst., Univ. of Stellenbosch, STELLEN- BOSCH, South Africa a. Cranial ontogenesis. Struthio (Aves) ERASER, A. S. B.Sc, M.Sc, Ph.D. — Animal Genetics Section, C.S.I.R.O., Univ. of Sydney, SYDNEY, N.S.W., Australia (no data received on Nov. 1=', 1953) FREMERY, Miss R. de B.Sc. — Hubrecht Lab., Internat. Embryol. Inst., Janskerkhof 2, UTRECHT. Holland a. Activation and transformation relations in the caudal portion of the neural plate and in the caudal archenteronroof. (Urodela) b. The autonomous developmental potencies of the blastema in regenerating larval limbs. Triturus taeniatus (Urodela) FRIBERG. U. Med.kand. — Embryol. Dept, Histol. Inst., Karolinska Inst., Solnavagen 1, STOCKHOLM 60, Sweden a. Incorporation of sulphur in fetus. Rattus norvegicus and Cavia cobaya (Rodentia) (in collaboration with N. RINGERTZ) FRICK, H. Dr Med. — Dr Senckenberg. Anat. Inst., Med. Fak. der Univ., Ludwig Rehnstr. 14, FRANKFURT/Main-Siid. Deutschland a. Placenta. Roussetus and Rhinolophus (Chiroptera) b. The development of the skull. Myotis myotis (Microchiroptera) c Die Entwicklung der Fenestra rotunda. (Mammalia) 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) h. Study of ductus arteriosus in relation to hatching. Gallus domesticus (Aves) r- 34 Giro GAILLARD. P. J. Med. Dr. Prof. — Lab. for Exper. Histol Ffc. of Med Univ. of Lcydcn. Wassenaarseweg, Boerhaavekwartier, LhlUhLlN, Hol- land 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 over some years) GALLERA. ]. Ph.D. — Inst. d'Histol. et d'Embryol.. Fac. de Med., LAU- SANNE. Suisse Inst. d'Anat., Fac. de Med., Univ. de Geneve, 20 Rue Ecole de Med., GENfiVE. Sui.sse a. Etude descriptive du developpement de I'innervation du coeur. Gallus (Arcs) (en collaboration avec J. A. BAUMANN) b. Etude expcrimentale sur le developpement histogenetique du systeme nerveux. (Amphibia) GALLIEN, L. Dr es Sci., Prof. — Lab. de Biol. anim. (P.C.B. section II), Fac. des Sci.. Univ. de Paris. 12 Rue Cuvier. PARIS Ve. France (no data received on Nov. 1^', 1953) GEIGY-HEESE, R. Dr. Prof. — Schweiz. Tropeninst.. Socinstr. 57 — Zool. Anstalt der Univ., Rheinsprung 9. BASEL. Schweiz a. Embryonale und postembryonal Entwicklung von Kopf und Darm. Esox lucius (Teleostei) h. Endocrinologie der Metamorphose (Xenoplastische Transplantation in- duktiver Organe). (Insecta) GEILENKIRCHEN. W. L. M. M.Sc. — Zool. Lab. der Rijks Univ.. Jans- kerkhof 3. UTRECHT. Holland a. Metabolism and respiration of egg and embryo. Limnaea stagnalis (Gastropoda) GENNARO. Jr. J. F. Ph.D. — Dept of Anat.. Coll. of Med.. State Univ. of New York. 350 Henry St. BROOKLYN 2. N.Y.. U.S.A. a. Effects of radiation on tissues. (Amphibia and Mammalia) GILBERT. Miss C. M.Sc. D.Sc. (Rand) — Anat. Dept. Med. School, Univ. of Witwatersrand. Hospital Hill. JOHANNESBURG. S. Africa (no data received on Nov. 1''. 1953) GILLMAN. J. D.Sc. M.B.. Ch.B. (Rand), Prof. — Physiol. Dept. Med. School. Univ. of Witwatersrand. Hospital Hill. JOHANNESBURG. S. Africa (no data received on Nov. l'^'. 1953) GIRAUD. Miss D. Preparatrice Temp. — Lab. d'Embryogenie comp.. Coll. de France. Place Marcelin Berthelot. PARIS Ve. France (no data received over some years) GIROUD. A. F.I. I.E.. Prof. — Lab. d'Embryol.. Fac. de Med., 15 Rue Ecole de Med.. PARIS Vie. France a. Developpement de I'encephale et spccialcment du diencephale. Etude structural en rapport avec I'apparition des fonctions. Mus tattus (Ro- de ntia) b. Rechcrches sur I'influcnce teratogene des avitaminoses maternelles. Mus rattus (Rodcntia) Giroud 35 Good c. Recherchus sur Tinfluence 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. The development of the urethra. Homo and other spec. (Mammalia) b. The early embryology. Macrorhinus spec. (Pinnipedia) c. The development of the external form. (Cervidae) GLIMSTEDT, G. Med.Dr, Prof. — Tornblad-Inst. of comp. Embryol., Biskopsgatan 7, LUND, Sweden (no data received on Nov. 1=', 1953) GLOOR, H. Ph.D., P.D. — Zool.-vergl. Anat. Inst., Naturwiss. Fak., Univ. Zurich, Kiinstlergasse 16, ZURICH 6, Schweiz (no data received over some years) 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 (Artiodactyla) b. Development of the regulatory mechanism of the blood flow in large arteries. Sus scro/a (Artiodactyla) c. Researches on the differentiation and growth in vitro of the neurons of the embryonic nervous centers. Gallus domesticus (Aves) GODLEWSKI, H. G. Med.Dr — Inst, of Histol. and Embryol., Med. Acad.. GDANSK. Poland (no data received over some years) GOLDSMITH, E. D. Dr. Prof. — Dept of Histol.. Coll. of Dentistry. New York Univ., 477 First Ave. NEW YORK 16, N.Y., U.S.A. a. Use of anti-vitamins {& anti-metabohtes) in development. Drosophila melanogaster (Diptera) h. Effects of cortisone on development. Drosophila melanogaster (Diptera) c. Effect of anti-vitamins on reproduction. Drosophila melanogaster (Dip- tera) d. Cortisone on developing bones and teeth. Mus norvegicus and Rattus rattus (Rodentia) e. Effect of anti-vitamins on reproduction. Mus norvegicus and Rattus rattus (Rodentia) GONTCHAROFF, Miss M. Dr es Sci. — Lab. d'Evolution des Etres or- ganises, Fac. des Sci. de Paris. 105 Boulevard Raspail, PARIS Vie, France a. Regeneration du SNC et action de la lumiere. Lineus ruber, Lineus san- guineus (Nemertini) b. Regeneration des yeux. Lineus ruber (Nemertini) c. Developpement post-larvaire. Lineus ruber (Nemertini) GOODHART, C. B. M.A.. Ph.D. — Dept of Zool., Univ. of Cambridge, Downing Street. CAMBRIDGE. England (U.K.) a. Physiology of development. (Vertebrata) b. Embryonic induction. Triturus (Urodela) c. Cleavage of the egg cell. (Invertebrata and Vertebrata) 36 G*^^"* Goss GOSS R I. A.B.. A.M.. Ph.D. — Arnold Biol. Lab., Brown Univ.. PRO- VIDENCE 12. R.I. . U.S.A. > J ;, ,• /r .r 1 a Problem of inducing regeneration. Rana (Anura) and Anohs (Lacerttha) GOSZWALD. K. Dr Phil.. Dr habil.rer.nat.. Prof. - Inst, f^^^ngewandte Zool. dcr Univ.. Naturw. Fak.. Rontgennng 10, WORZBURG. Dcutschland . t u * i a Embryoloqische Studien. Formica ru/a u.a. (Formiadae, Hymenopera) b. Determination der Ameiscn-Kasten. Formica rufa. Lasius niger u.a. (tor- micidac. Hiimcnoptcra) c Parthcnogcnese. (Formicidae. Hymenoptera) d Kiinstliche Begattung. (Lepidoptera, Coleoptera and Hymenoptera) GOTHIfi. Miss M.M.C.S. M.D.. Dr es Sci. — Lab. d'Hormonol. et de Cytol.. Ecole Pratique des Hautes Etudes. Hopital Broca, 111 Rue L. M. Nordmann. PARIS XIIP, France a. Etude des substances tensioactives sur la morphogenese embryonnaire par microinjection dans de jeunes gastrulae. (Amphibia) b. Etude des injections de noyaux et derives des nucleines dans de jeunes gastrulae. (Urodela) c. Traceurs et spermatozoides. Homo (Primates) d. Etude de la morphogenese par les traceurs. Mus miisculiis (Rodentia) e. Decoloration du dichlorophenol indophenol (DPIP) par I'ovocyte. Etude par micro-injection quantitative. Mas musculus (Rodentia) (en colla- boration avec R. MORICARD et O. BAIOCCHI) f. Utilisation des traceurs dans I'etude des correlations unissant les gonado- trophines. le liquide folliculaire et la maturation ovulaire. Mas musculus (Rodentia) (en collaboration avec R. MORICARD) 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 mori (Lepidoptera), Rana nigromaculata (Anura) b. Influence of the nucleoproteins upon early development. Triturus pyrrho- gastcr (Urodela) (in collaboration with T. HAM A) GOULD. R. P. B.Sc.Zool. — Biol. Dept, Middlesex Hospital, LONDON W. I.England (U.K.) a. Cvtoplasmic and nuclear relationships in blastoderms. Gallus domesticus (Aves) GOVAERT. J. — Lab. of Anat.. Fac. of Med.. Univ. of Gent. Bylokekaai 1, GENT. Belgium a. Embryology. Fasciola hepatica (Trematoda) GRABOWSKl C. T. B.S.. Western Reserve U.. Cleveland. Ohio — Dept of Biol.. The Johns Hopkins Univ.. Charles and 34th Sts, BALTIMORE 18. Md. U.S.A. a. Experimental analysis of initiation and early development of the central nervous system. Gallus domesticus (Aves) h. Role of Hensen's node in development. Gallus domesticus (Aves) GRANT. Ph. B.S.. M.A.. Ph.D. — Dept of Zool.. Fac. of pure Sci.. Colum- bia Univ.. Broadway and 116th St. NEW YORK 27, N.Y.. U.S.A. a. Phosphate metabolism during regeneration. Tubularia crocea (Hydro- idea) b. Localization of phosphate turnover in development. Rana pipiens (Anura) Grau 37 Gruen GRAUMANN, W. Dr Med. — Anat. Inst, der Univ., Burgstr. 51. GOT- TINGEN, Deutschland a. Developmental histochemistry (esp. carbohydrate compounds). Mus musculus, Mesocricetus auratus (Rodentia) GREEN, Mrs E. U. Ph.D. — Lankenau Hospital Research Inst, and Inst. for Cancer Research. Burholme Ave, Fox Chase, PHILADELPHIA 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) b. Nuclear constitution of mesenchymal cells and their derivatives. Rana (Anura) GREEN. S. H. M.B., Ch.B. — Dept of Anat.. The Med. School. Birming- ham Univ., Edgbaston, BIRMINGHAM, England (U.K.) (no data received on Nov. 1^*, 1953) GREGG, J. R. Ph.D. — Dept of Zool.. Fac. of pure Sci., Columbia Univ.. Broadway and 1 16 St. NEW YORK 27. N.Y.. U.S.A. a. Metabolism of normal animals and hybrids. Rana pipiens, Rana pipiens X Rana sylvatica (Anura) GREULICH. R. C. B.A., Ph.D. — Dept of Anat., School of Med., Univ. of Cahf.. LOS ANGELES, Cal., U.S.A. a. The development of bones and teeth as shown by radioautographs of radio-carbon-labeled bicarbonate. (Vertebrata) GRIGNON, G. — Lab. d'Histol.. Dep. d'Embryol., Fac. de Med., 31 Rue Lionnois, NANCY (Meurthe & Moselle), France a. Developpement de I'hypophyse. (Aves) GROBSTEIN, C. Ph.D. — Developm. Physiol. Unit.. Nat. Cancer Inst.. BETHESDA, Md, U.S.A. a. Morphogenesis and histogenesis of early rudiments in vitro and on reimplantation. Mus musculus (Rodentia) h. Epithelio-mesenchymal inductive interactions in early rudiments. Mus musculus (Rodentia) c. Time of cytodetermination in relation to morphogenetic and histogenetic events. Mus musculus (Rodentia) GRODZInSKI, Z. Prof. — Zaklad Anat. Porownawczej U. J. im. H. Hoyera, sw. Anny 6, KRAKOW. Poland a. Influence of temperature upon the isolated heart's rate of embryos. Salmo (Teleostei) b. Development of the blood vessels in the tail of embryos. Salmo (Te- leostei) GROOT, B. de 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. DINGER, W. J. van DONGEN. Miss H. E. van HEYNINGEN, C. R. JANSSEN and Chr. P. RAVEN) GRUENWALD, P. M.D. — Beth-El Hospital. Linden Boulevard and Rockaway Parkway. BROOKLYN 12, N.Y.. U.S.A. a. Embryonic development of selenium-induced malformations. Gallus domesticus (Aves) , , ■ -50 Had Gruenwald -'° b. Systematic investigation of current cases of prenatal disease and mal- format.on in autopsy material (Part of ..Brooklyn Survey of Neonatal Pathology"). //omo CPnmafe5; GRONEBERG H Ph.D.. M.D.. D.Sc. — Dept of Genetics. Univ. Coll. London. Gower St. LONDON W.C. 1. England (U.K.) a Developmental genetics of the skeleton: effects of major genes; develop- ment and genetics of patch, a semi-dominant spotting gene with terato- logical effects in the homozygote. Mus musculus (Rodentta) GRONTHAL. E. Dr — Hirnanat. Inst, der Psychiatr. Univ. klinik. Med. Fak.. Waldau, BERN, Schweiz a. Hirncntwicklung: Bauplan von Zwischenhirn und hndhirn. Lrallus (Arcs). Mus (Rodentia) und Homo (Primates) GUARDABASSI. Miss A. Dr — Inst, of comp. Anat.. Via Giovanni Gio- Utti 34. TORINO. Italy , ^^ ^ „ . a. Study of the course and connections of the retinal fibers tollowing rotation 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 lime sacs of tadpoles. Rana dal- matina (Anura) d. The development of the endolymphatic sac following thymus removal in tadpoles. Xenopus laevis (Anura) GUBBAY. Miss V. B.Sc.Hons. — Dept of Zool., Univ. of the Witwaters- rand. Milner Park. JOHANNESBURG. South Africa a. Early embryology and placentation. Eremitalpa granti (Insectivora) GUSTAFSON. G. S. Fil.mag. — Zootom. Inst., Univ. of Stockholm, 116 Drottninggatan. STOCKHOLM. Sweden a. Ontogeny of the skull. (Gadidac and Acanthopterygii. Teleostei) GUSTAFSON. T. Fil.Dr — Wenner-Grens Inst, for experimental Biology, Norrtullsgatan 16. STOCKHOLM Va.. Sweden (no data received on Nov. I'*', 1953) GUYfiNOT. E. Dr Med., Dr Sci. — 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. Dr. — Embryol. Dept. Histol. Inst.. Karo- linska Inst.. Solnavagen 1. STOCKHOLM 60, Sweden a. Postnatal development of lymphatic system; endocrinological influences (thyroid, thymus). Cavia cobaya (Rodentia) b. Postnatal development of newborns in different oxygen concentrations, with special consideration to malformations of the eyes, lungs and cardio- vascular system. Mus musculus (Rodentia) HAAS. G. — Zool. Inst, der Univ., Katharinenstr. 20, FREIBURG i. Brsg., Deutschland a. Entwicklung der Sehleistung. ( Lcpidoptera; Culicidae. Diptera) (ge- meinsam mit H. LODTKE) HADORN, E. F.I. I.E.. Dr Phil., Prof. — Zool.-vergl. Anat. Inst.. Natur- wiss. Fak.. Univ. Zurich, Kiinstlergasse 16. ZORICH 6. Schweiz (no data received over some years) Haf 39 Halli HAFFEN. Miss K. 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. Etude du developpement et de la regression du mesonephros. Gallus (Aves) b. Recherches sur la differencation in vitro des gonades embryonnaires. (Aves) (en collaboration avec Et. WOLFF) c. Recherches sur les besoins nutritifs des gonades embryonnaires en cul- ture in vitro. (Aves) HAGET, A. Dr es Sci. — Lab. de Biol. Gen., Fac. des Sci. de Bordeaux, 40 Rue Lamartine, TALENCE (Gironde), France a. Analyse experimentale de la morphogenese embryonnaire de la tete. Leptinotarsa (Coleoptera) HAGGIS, A. }. B.A.. M.S. — Dept of Biol.. Coll. of Arts and Sciences, Univ. of Rochester, ROCHESTER 3, N.Y.. U.S.A. a. Analysis of the determination of the olfactory placode. Ambystoma punctatum (Urodela) HAGQVIST. G. Prof. — Embryol. Dept, Histol. Inst.. Karolinska Inst., Solnavagen 1, STOCKHOLM 60, Sweden a. Experimental polyploidy. (Vertebrata) HAGSTROM, B. E. B.A. — Wenner-Grcns Inst, for experimental Biology, Norrtullsgatan 16. STOCKHOLM Va.. Sweden (no data received on Nov. 1^', 1953) HAINES, R. W. M.B., B.S., D.Sc. — Dept of Anat.. Fac. of Med., Univ. of Sheffield, SHEFFIELD, England (U.K.) a. Study of hallux valgus. Homo (Primates) b. Study of hand. (Primitive Mammalia) HAKANSSON. R. Tandlakare — Tornblad-Inst. of comp. Embryol., Bis- kopsgatan 7, LUND, Sweden (no data received on Nov. 1=', 1953) 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 St, LOUISVILLE 2, Ky, U.S.A. a. Intrinsic contractihty in the embryonic mammalian heart and its parts. and its modification by various experimental procedures. Mus norvegicus albinus (Rodentia) HALL, P. — Tornblad-Inst. of comp. Embryol, Biskopsgatan 7, LUND, Sweden (no data received on Nov. 1=', 1953) HALL. T. S. Ph.D.. Prof. — Dept of Zool., Washington Univ., Lindell and Skinker Aves, ST LOUIS 5, Mo., U.S.A. (no embryological work in progress) HALLIDAY, R. B.Sc.( Wales) — Agricultural Research Council, Unit of Embryol.. Dept of Zool., Univ. Coll. of North Wales, BANGOR, Caernarvonshire, N. Wales (U.K.) a. Immunological relations of mother and young. (Mammalia) Hama ^0 ""^^" HAMA T. M.A.. D.Sc. Asst Prof. — Biol. Lab.. Keio Univ.. Hiyoshi, Kohoku. YOKOHAMA, Japan . t^ .. l a. Morphogcnct.cal and chemical analysis of the organizer. Tnturus pyrrho- b Studies on the influence of the pterins and their like upon development in various animals. (Arthropoda, Pisces, Amphibia etc.J c. Influence of the nucleoproteins upon early development. Tnturus pyrrho- ijastcr (llrodcla) (in collaboration with T. GOTO) HAMBURGER V F.I. I.E.. Ph.D., Prof. — Dept of Zool., Washington Univ.. Lindcll and Skinker Aves, ST LOUIS 5, Mo.. U.S.A. a Neuro-cmbryology. Ga//u5 domesticus (Aves) (in collaboration with Miss R. LEVI-MONTALCINI) turus (Urodela) b. Effects of mouse sarcoma on growth in vivo and in vitro. Tn- HAMILTON. H. L. B.A., M.S., Ph.D.. Prof. — Dept of Zool. and En- tomol.. 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) c. Studies on the relation of enzyme systems to morphogenesis. 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. Growth and atresia of the ovarian follicles. Mustela putorius, furo L. (Carnivora) (in collaboration with R. J. HARRISON, London) b. Placentation and changes in reproductive tract. (Cervidae) (in collabo- ration with R. J. HARRISON. London) c. The development and structure of the placenta. Home (Primates) (in collaboration with J. D. BOYD. Cambridge) HAMMOND. W. S. Ph.D.. Prof. — Dept of Anat., School of Med.. State Univ. of New York, 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. Development of the visceral skeleton. Gallus domesticus (Aves) (in collaboration with C. L. YNTEMA) HAMPfi, A. Lie. es Sci. — Lab. de Zool. de la Fac. des Sci. et Lab. d'Em- bryol. et Teratol. exper. du C.N.R.S., Inst, de Zool. et de Biol, gen., 12 Rue de TUniversite, STRASBOURG, France a. Etude de la regulation des ebauches dcs membres. Gallus gallus (Aves) HANSON. Miss E. J. Ph.D. — M.R.C. Biophysics Res. Unit. King's Coll., Strand. LONDON W.C. 2. England (U.K.) (no data received over some years) HARDER. W. Dr rer.nat. — Inst, fur Fischereibiol. der Univ. Hamburg, Holstcnwall 24. HAMBURG 36, Deutschland a. Postcmbryonale Entwicklung, insbesondere die Umwandlungen des Ver- dauungsapparates wahrend der Metamorphose. Vergleichende Unter- suchungen innerhalb einer Familie. Clupea harengus, C. sprattus, C. pilchardus, Engraulis encrasicholus u.a. (Clupeidae, Teleostei) Harder 41 Harrison b. Entwicklung der Korperform. Clupea harengus L. (Teleostei) c. Entwicklung der Respirationsorgane. Clupea harengus L. (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 Biol. Lab., 17 Randle St, SYDNEY. N.S.W.) a. Induction of hair follicle formation. Mus musculus and Ovis (Mam- malia) h. Pigmentation processes in skin and hair in 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. 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. Experimental investigation of factors influencing the morphogenesis of the inferior olive and pons. Gallus domesticus (Aves) HARRIS. J. E. M.A., Ph.D.. Prof. — Dept of Zool., The University, BRISTOL 8, England (U.K.) a. Development of the nervous system and behaviour pattern. Scylliorhinus canicula, Petromyzon fluviatilis, Salmo spp. (Pisces) (in collaboration withH. P. WHITING) HARRIS, M. Ph.D., A.B., Prof. — Dept of Zool, Univ. of Cahf., BER- KELEY 4, Cal., U.S.A. a. Growth factors in alcoholic extracts of embryos. Gallus (Aves) h. Interaction of nucleoprotein and dialysate growth factors in embryo extract. 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. a. Development of limbs with reference to the roles played by ectoderm and mesoderm. Amby stoma (various species) (Urodela) h. Induction and symmetry relations in the development of the internal ear. Ambystoma punctatum (Urodela) 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) h. 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 putodus [uro L. (Carnivora) (in collaboration with W. J. HAMILTON) d. Placentation and changes in reproductive tract. (Cervidae) (in colla- boration with W. J. HAMILTON ) e. Changes in reproductive tract and placenta. (Pinnipedia and Carnivora) (in collaboration with L. HARRISON MATTHEWS) Harrison ^^ f. Distribution of rad.o-potass.um in placenta and uterus. (Rodentia and Carnivora) „. ^ , o r t j HARRISON MATTHEWS. L. D.Sc — do The Zool. See. of London. LONDON, England (U.K.) ,„ . ^. j r- ■ i a. Changes in reproductive tract and placenta. (Pinmpedia and Carnivora) (in collaboration with R. J. HARRISON) 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, environmental and genetic factors operative in the development of so- called ..melanin tumors". Drosophila melanog aster (Diptera) HARTWIG, H. Dr Phil. — Zool. Inst, der Univ. Koln, Kerpenerstr. 13, KOLN-LINDENTHAL. Deutschland (no data received on Nov. 1^', 1953) 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. (Echino- dermata) b. Monograph, including classified compilation of all experimental work. Arbacia punctulata (Echinoidea) c. Moving pictures of metamorphosis and of the natural history (in color). Arbacia punctulata (Echinoidea) d. Determination of sex by electrical method. Arbacia punctulata (Echinoi- dea) HARVEY, E. B. B.S.. M.A. — Dept of Zool., Univ. of Cahf.. BERKELEY 4. Cal.. U.S.A. a. Placentation. Ochotonidae and Aplodontidae (Rodentia) HAYASHI. Y. M.A. (Rigakushi) — Biol. Inst.. Fac. of Sci.. Nagoya Univ., Chigusa-Ku, NAGOYA, Japan a. Regional induction through heterogeneous inductors. Triturus pyrrho- gaster (Amphibia) h. Biochemical and histological studies of oogenesis. Triturus pyrrhogastcr (Amphibia) (in collaboration with S. OSAWA) HEATH. H.D. Ph.D. — Dept of Biol. Sci., Stanford Univ.. STANFORD, Cal.. U.S.A. a. Blastema formation in limb regeneration. (Amphibia) b. Size-regulation in grafted eyes. (Amphibia) HEAYSMAN. Miss J. E. M. B.Sc. Ph.D. — Dept of Embryol.. Univ. Coll. London. Gower St, LONDON W.C. 1, England (U.K.) a. Cinematographic study of cell relations in tissue culture. Gallus domes- ticus (Arcs) (in collaboration with M. ABERCROMBIE) HECKERMAN. R. O. M.S. — Univ. of Pittsburgh, PITTSBURGH, Pa, U.S.A. (no data received over some -years) 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 Cahf.. LOS ANGE- LES 24. Cal.. U.S.A. a. Electrophoresis of serum of developing embryo. Gallus domesticus (Aves) Heimann 43 Hert HEIMANN, H. Dr Med. — Hirnanat. Inst, der Psychiatr. Univ.-klinik, Med. Fak., Waldau. BERN, Schweiz a. Endhirnentwicklung. (Teleostei) HEMMINGS, W. A. B.A. — Agricultural Research Council, Unit of Em- bryol., Dept of Zool., Univ. Coll. of North Wales, BANGOR. Caernar- vonshire, N. Wales (U.K.) a. Study of the immunological relations of mother and fetus. (Mammalia) HENDERSON— PHILLIPS, Mrs M. B.Sc, Ph.D. — Dept of Zool., Univ. Coll. of North Wales. BANGOR, Caernarvonshire, N. Wales (U.K.) (no data received on Nov. l^S 1953) HENKE, K. F.I.I.E., Dr Phil., Prof. — Zool. Inst, der Univ. Gottingen. Mathem.-Naturw. Fak.. Bahnhofstr. 28. GoTTINGEN. Deutshland a. Embryonale und post-embryonale Entwicklungsgeschichte. Carausius morosus (Phasmida, Insecta), Corixa spec. (Hemiptera) (mit Mit- arbeitern) b. Entwicklungsphysiologie. Drosophila mel. (Diptera). Ephestia kuhniella (Lepidoptera), Anas boschas (Aves) (mit Mitarbeitern) c. Genetik. Drosophila mel. (Diptera), Ephestia kuhniella (Lepidoptera) (mit Mitarbeitern) HENLEY. Miss C. M.A.. Ph.D. — Dept of Zool.. Univ. of North Carohna, CHAPEL HILL. N.C., U.S.A. a. Effects of radio-isotopes on mitosis. Ambystoma maculatum (Urodela) and Chaetoptems pergamentaceus (Annelida) (in collaboration with D. P. COSTELLO and D. E. KENT) HENZEN. W. — Zool. Inst, der Univ. Bern. Sahlistr. 8, BERN, Schweiz a. Augenentwicklung und Epidermisderivate der Mundregion in Chimaren. Triton X Bombinator (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 Avenue F. D. Roosevelt. BRUXELLES. Belgique (no data received over some years) HERMANN. G. — Zool. Inst, der Univ.. Katharinenstr. 20. FREIBURG i. Brsg., Deutschland a. Entwicklung der Sehleistung. Miis rattus (Rodentia) (gemeinsam mit H. LODTKE) HERMANN, H. Dr. Prof. — Div. of Chem. Embryol.. Med. Center. Univ. of Colorado. 4200 East Ninth Ave. DENVER 20. Col., U.S.A. a. Chemistry of muscle differentiation. Gallus (Aves) (in collaboration with I. R. KONIGSBERG and L. LERMAN) b. Study of differentiation of somites in explants (Spratt technique). Gallus (Aves) (in collaboration with U. ROTHFELS) c. 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 U. ROTHFELS) HERTIG, A. T. B.S.. M.D., Prof. — Harvard Univ. Med. School, Dept of Pathol.. 25 Shattuck St, BOSTON 15, Mass., U.S.A. — Boston Lying-in Hospital. 221 Longwood Ave. BOSTON 15. Mass. — Free Hospital for Women. 245 Pond Ave. BROOKLINE. Mass. Hcrtig ^-1 "'" a. Development of ova from fertilization to 14 days (first missed menstrual period). Homo (Primates) (in collaboration with J. ROCK, W. J. MUL- LIGAN and Eleanor C. ADAMS) HEIISER C H. F.I.I.E.. Prof. — Dept of Micr. Anat., Med. Coll. of Georgia. AUGUSTA. Ga, U.S.A. a. The first three weeks of development (Horizons I to X). Homo (Pri- mates) b. Development of the yolk sac. Homo (Primates) HEYN. C. B. M.B. — Anat.-Embryol. Lab. of the Univ., Fac. of Med., Wasscnaarscwcg. Boerhaavekwartier, LEIDEN, Holland (no data received over some years) HEYNINGEN. Miss H. E. van B.Sc. — Zool. Lab. der Rijks Univ., Jans- kerkhof 3. UTRECHT, Holland a. Analysis of lithium action. Limnaea stagnalis (Gastropoda) (in colla- boration with Miss C. DINGER, W. J. van DONGEN, B. de GROOT, C. R. I ANSSEN and Chr. P. RAVEN ) HIGHNAM. K. C. M.Sc. — Dept of Zool.. Univ. of Sheffield, SHEF- FIELD. England (U.K.) a. Influence of hormones on metamorphosis. (Lepidoptera) HILL, J. P. F.I. I.E., F.R.S., Prof. (Emer.) — Dept of Embryol.. Univ. Coll. London, Gower St, LONDON W.C. 1, England (U.K.), Private addr.: ..Kanimbla", Dollis Ave, Finchley, LONDON N. 3, England (U.K.) a. Studies in development, especially placentation. (Mammalia) b. Development of neural crest. (Aues and 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. Mesocricetus autatus (Ro- dcntia) b. Ossification and calcification from postnatal day 8 to the adult condition. Mesocricetus aiiratus (Rodentia) c. Flame photometric analysis for Na, K and Ca from birth to the adult condition. Mesocn'cefiis auratus (Rodentia) d. Glycogen studies in the fetal liver (and other tissues). Mesocricetus auratus (Rodentia) e. The use of organic chelating agents in the histological study of bone and teeth. Cavia porcellata (Rodentia) f. The histology of the isthmus and uterus in relation to egg shape and egg rotation. Gallus domesticus (Aves) g. The differentiation of the cerebellum following experimental lesions to the metencephalon. Gallus domesticus (Aves) HILLER, S. M.D. — Inst, of Histol. and Embyrol., Med. Acad., GDANSK, Poland (no data received over some years) HINTZSCHE, E. Dr Med.. Prof.ord. — Anat. Inst., Biihlstr. 26, BERN, Schweiz a. Anorganischer Stoffwechscl, Fermentchemische Untersuchungen. Homo and other spec. (Mammalia) b. Experimcntelle Studien iibcr Zellvermehrung in Gewebekulturen. Ein- wirkung fordernder und hemmender Substanzen. Gallus (Aves), Orycto- lagus cuniculus (Lagomorpha) . Homo (Primates) Hir 45 Holmg HIRATA, A. A. A.B., M.S. (Duke Univ.) — Dept of Zool., Univ. of Calif., LOS ANGELES 24. Cal., U.S.A. a. Stability of cellular particulates in developing tissues and in neoplasms. (Aves and Mammalia) (in collaboration with A. M. SCHECHTMAN) HISHIDA, T. M.A. (Rigakushi) — Biol. Inst., Fac. of Sci.. Nagoya Univ.. Chigusa-Ku, NAGOYA, Japan a. Metabolic analysis of early development. Oryzias latipes (Teleostei) (in collaboration with E. NAKANO) b. Melanin formation in color phenotypes. Oryzias latipes (Teleostei) (in collaboration with T. YAMAMOTO) HJELMMAN, G. M.D.. Prof. — Dept of Anat., Fac. de Med., Univ. of Helsinki, HELSINKI, Finland (no data received on Nov. 1"', 1953) HOFF-JORGENSEN, E. Dr. Phil. — Inst, of Biochem., Fac. of Med.. Univ. of Copenhagen, Juliane Mariesvej 30, COPENHAGEN 0, Den- mark 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. (no data received on Nov. 1^', 1953) 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) b. Influence of vitamine D3 on the development and calcification of en- dosteal 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. (Vertebrata) b. Riickenmarkentwicklung. (Vertebrata) 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) b. The wing problem. (Aves) Holter 46 Hubl HOLTER. H. Ph.D. — Cytochcm. Dept. Carlsberg Lab., 8 Gl. Carlsbergvej, COPENHAGEN Valby. Denmark a. Enzyme development in embryos. (Echinodermata) b. Cytochemistry. (Protozoa) HOLTFRETER. J. K. F. F.I. I.E., Ph.D., Prof. — Dept of Biol.. Coll. of Arts and Sciences. Univ. of Rochester, ROCHESTER 3, N.Y., U.S.A. a. Effects of X-rays on some embryological processes. Ambystoma punc- tatiim and Rana pipiens (Amphibia) HOLTZER. H. Ph.D. — Dept of Anat., School of Med., Univ. of Penn- sylvania. PHILADELPHIA 4, Pa, U.S.A. a. Role of spinal cord in the morphogenesis of the vertebral column. Am- bystoma (Urodcla) b. Factors influencing the organization of the neural action systems in the brachial spinal cord. Ambystoma (Urodela) c. Role of the spinal cord in tail regeneration. Ambystoma (Urodela) HONIO. Miss B. — Dept of Zool.. Univ. of Connecticut, STORRS, Conn., U.S.A. a. Placental function. Thammophis s. sirtalis (Serpentes) (in collaboration with H. CLARK) 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.. DURHAM. N.C., U.S.A. a. Organogenesis during development and changes at metamorphosis. Ichthyomyzon (Cyclostomata) h. Tail regeneration in Ammocoetes. Ichthyomyzon (Cyclostomata) 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) HOWORKA. E. I. M.D.. Ph.D. — Klinika Ginekologiczna Poznan. Polna 33. POZNAN, Poland (no data received over some years) HUBER. W. Dr es Sci. — Lab. de Zool. dc la Fac. des Sci. et Lab. d'Em- bryol. et Teratol. exper. du C.N.R.S., Inst, de Zool. et de Biol, gen., 12 Rue de lUniversite, STRASBOURG, France a. Developpement de la tete. Etude morphologique et experimentale de developpement de la forme encephalique en rapport avec Ic crane; cour- bure et redressemcnt de la tete; position des yeux. Analyse de races a forme encephalique aberrante. Gallus domesticus (Aves) HUBL. H. Dr rer.nat. — Zool. Inst, der Univ., Naturw. Fak., Rontgenring 10, WORZBURG. Deutschland a. Einfluss des Colchicins auf die Regeneration. Lumbricus und Tubifex (Oligochacta) b. Untersuchungen iiber die neurosekretorischen Zellen im Gehirn und dcren Einfluss auf die Regeneration. (Lumbricidae, Oligochaeta) Hubl 47 Ich c. Weitere Untersuchungen iiber die Beziehungen zwischen Nervensystem und Regeneration. (Lumbricidae, Oligochaeta) HUBLfi, J. Lie. Zool. — Afd. Morphol., Lab. voor Zool., Universiteitstr. 14, GENT, Belgie (no data received over some years) HUGOSSON. R. Med.kand. — Tornblad-Inst. of comp. Embryo!., Biskops- gatan 7, LUND, Sweden (no data received on Nov. 1^', 1953) HULTIN, J. M. T. Fil.lic. — Wenner-Grens Inst, for experimental Biology, Norrtullsgatan 16, STOCKHOLM Va., Sweden (no data received on Nov. 1^', 1953) HUMPHREY, R. R. F.LI.E., A.M., Ph.D., Prof. — Dept of Anat., School of Med., Univ. of Buffalo, 3435 Main St, BUFFALO 14, 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) g. Modification in a lethal trait permitting survival of homozygotes which commonly die. 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) h. Pancreatic developmental studies. Homo (Primates) c. Diplomyelia in embryos: cases with one spinal cord located dorsal to the other. Homo (Primates) HUNT, E. L. Ph.D., Prof. — Dept of Biol.. Emory Univ., ATLANTA. Ga, U.S.A. a. Studies on the distribution of certain radio-isotopes in the embryo. Gallus (Aves) b. Studies on the distribution of radio-iodine. (Amphibia) HYLBOM, J. R. Fil.mag. — Zootom. Inst., Univ. of Stockholm, 116 Drott- ninggatan, STOCKHOLM, Sweden a. Development of larvae including metamorphosis. Philidium (Nemertini, Plathelminthes) ICHIKAWA. A. Rigakushi (M.S.). Rigakuhakushi (Dr). Prof. — Zool. Inst., Fac. of Sci., Hokkaido Univ., North 8, West 5, SAPPORO, Japan (no data received on Nov. 1=', 1953) Ich 'iS jano ICHIKAWA, M. Ph.D., Prof. — Lab. of Embryol. and Exp. Morphol., Zool. Inst., Dcpt of Sci.. Kyoto Univ.. KYOTO. Japan a. Hormonal mechanism of metamorphosis. Bombijx mori, Luehdorfia ja- ponka. Philosamia cynthia ricini (Lcpidoptera) (in collaboration with b. Regeneration of limb. (Amphibia) co-workers) IKUSHTMA. N. — Lab. of Embryol. and Exper. Morphol.. Zool. Inst.. Dept of Sci.. Kyoto Univ.. KYOTO. Japan a. Redoxpotential of early embryo. Triturus pyrrhogaster and Rhacophorus schlegclii (Amphibia) b. Regional specificity of the inductive faculty of the organizer. IMBRIANO. O. — Central dc Investig.. Minist. de Salud Piibl. de la Nacion, Bolivar 1128. BUENOS AIRES, Argentina (no data received on Nov. 1", 1953) IMMERS, J. Mag.rer.nat. — Wenner-Grens Inst, for experimental Biology, Norrtullsgatan 16. STOCKHOLM Va.. Sweden (no data received on Nov. 1=*', 1953) INCE. Miss F. E. M.Sc. — Dept of Zool., Bedford Coll., Regent's Park, LONDON N.W. 1. England (U.K.) (no data received on Nov. l"*, 1953) 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 pa-thenogenesis. Hemicentrotus pulchcrrimus. Pseudocentrotus depressus (Echinoidea) (in collaboration with M. SUGIYAMA) ISINGS. J. M.Sc. — Vezel Inst. T.N.O., Mijnbouwstraat 16a, DELFT, a. Cytochemistry of hair development. (Mammalia) Holland b. Physiology and endocrinology of hair development. Cavia cobaya Marcor and Miis miisculus (Rodentia) c. Investigation of hair development by means of radioautography. Mas mnsculus and Cavia cobaya Marcor (Rodentia) JACOBSON. 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.. CaHf. Inst, of Tech- nol., PASADENA 4, Cal., U.S.A. a. Study of spawning stimuli. Pelvetia fastigiata, Hesperophycus harveya- nus (Fucales, Algae) h. Using developing eggs, search for gradient in COo output. Pelvetia fastigiata. Hesperophycus harveyanus (Fucales. Algae) JAGER. B. de M.Sc. — Division of Fisheries, Beach Road. Sea Point, CAPE TOWN. South Africa a. Embryology. Thyrsites atun (Euphr.) (Scombroidea. Neopterygii) JAGERSTEN, K. G. M. Fil.Dr, Prof. — Zool. Inst., Uppsala Univ., UPP- SALA, Sweden a. Larval development. (Polychacta) JANOSKY. L. A.B. — Dept of Anat., Med. School, Univ. of Kansas, LAWRENCE. Kan.sas, U.S.A. a. Histochemical localization of glycogen associated with the central ner- vous system in developmental behaviour. Ambqstoma maculatum (Uro- dcla) (in collaboration with E. WENGER and P. ROOFE) Jans 49 Kail JANSEN, J. M.D. — Anat. Inst., Univ. of Oslo, OSLO, Norway a. Morphogenesis of the rhombencephalon. Balaenoptera physalus (Ceta- cea) b. Development of the rhombencephaUc nuclei. Balaenoptera physalus (Ce- tacea) JANSSEN, C. R. B.Sc. — Zool. Lab. der Rijks Univ., Janskerkhof 3, UTRECHT. Holland a. Analysis of Hthium action. Limnaea stagnalis (Gastropoda) (in colla- boration with Miss C. DINGER, W. J. van DONGEN, B. de GROOT, Miss H. E. van HEYNINGEN and Chr. P. RAVEN) 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, Silu- ridae and Teleostei) JOHNEN, Miss A. G. Drphil. — Zool. Inst, der Univ. Koln, Kerpenerstr. 13, KOLN-LINDENTHAL, Deutschland a. Die Wirkungsspezifitat abnormer Induktoren in der Entwicklung. (Am- phibia) JOHNSON, F. R. M.D,. B.Ch., B.A.O. — Dept of Anat., Fac. of Med., Univ. of Sheffield, SHEFFIELD, England (U.K.) a. Functional histology of urinary passages of kidney. (Mammalia) h. Histochemical studies of various tissues. (Mammalia) JONES B. M. D.Sc. — Dept of Zool., Univ. of Edinburgh, West Mains Rd, EDINBURGH 9, Scotland (U.K.) (no data received on Nov. l^S 1953) 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. Oryc- tolagus cuniculus (Lagomorpha) , 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 hmb abnormalities by hormonic treatment. The problem of congenital amputations. KAJISHIMA, T. Rigakushi — Biol. Inst., Fac. of Sci., Nagoya Univ.. Chigusa-Ku, NAGOYA, Japan a. Experimental studies on the mechanism of a blastoderm differentiation. (Crustacea) b. Histochemical investigation on the mosaic eggs. (Crustacea) KALIN, J. Prof. — Zool.-vergl.-anat. Inst, der Univ.. FREIBURG, Schweiz (no data received on Nov. 1^', 1953) KALK, Mrs M. J. B.Sc. (London) — Dept of Zool., Univ. of the Wit- watersrand. Milner Park. JOHANNESBURG, South Africa a. An investigation into the biochemical ontogeny of muscle by an immuno- logical technique. Xenopus laevis (Anura) KaLLeN, B. Docent — Tornblad-Inst. for comp. Embryol., Biskopsgatan 7, LUND, Sweden (no data received on Nov. l'\ 1953) Kam 50 Kent KAMER. J. C. V. d. DrSc. — Zool. Lab. der Rijks Univ., Janskerkhof 3, UTRECHT. Holland a. Normal development and cytology of the pineal region. Torpedo ocel- lata and Torpedo mannorata (Selachii) b. Normal development and cytology of the saccus vasculosus. Scyllium stellarc and Scyllium canicula (Selachii) c. Normal development and cytology of the pineal region. Crocodylus vul- garis (Reptilia) KANOH, Y. Rigakushi (M.S.). Asst Prof. — Zool. Inst., Fac. of Sci.. Hokkaido Univ.. North 8. West 5. SAPPORO, Japan (no data received on Nov. 1'', 1953) KARCZMAR. A. G. Ph.D. — Georgetown Univ., School of Med., WASHINGTON 7, D.C., Md, U.S.A. (no data received on Nov. 1=", 1953) KATAKURA, Y. M.A. — Biol. Lab., Keio Univ., Hiyoshi, Kohoku, YO- KOHAMA, Japan (no data received on Nov. 1*', 1953) KAVANAU, J. L. B.S., M.S., Ph.D. — Werner-Grens Inst, for exper. Biol.. Norrtullsgatan 16, STOCKHOLM 23. Sweden a. The free amino acid, peptide and protein metabolism of normal and lithium-treated developing eggs. Strongylocentrotus pmpuratus, Para- centrotus lividus and other species (Endocyclica, Echinoidea) KAWAKAMI. I. Dr Sc, Prof. — Biol. Inst., Fac. of Sci., Kyushu Univ., FUKUOKA, Japan a. Inductive effect and embryonic field, with special reference to the devel- opmental mechanism of the cephalic sensory organs. (Amphibia) b. Effects of chemicals on development. (Amphibia) KAWAKAMI, Mrs K. I. — Biol. Inst., Fac. of Sci., Kyushu Univ., FU- KUOKA, Japan a. Mechanism of regeneration. Eisenia faetida (Oligochaeta) b. Effects of trypan blue upon embryogenesis. Rana nigromaculata and Triturus pyrrhogaster (Amphibia) KAWAMURA. K. Rigakushi — Embryol. Section. Dept of Biol., Tokyo Metropolitan Univ., Setagaya-ku, TOKYO, Japan a. In vitro culture of neuroblast. Species undetermined f/nsecfaj KELLER. L. A.B. — Dept of Anat., Med. School, Univ. of Kansas. LAW- RENCE. Kansas. U.S.A. a. Histochemical patterns associated with the central nervous system in developmental behaviour. Amby stoma maculatum (Urodela) (in colla- boration with E. WENGER and P. ROOFE) KEMP. N. E. Ph.D. — Dept of Zool.. Univ. of Michigan. ANN ARBOR, Mich.. U.S.A. a. Use of radioactive isotopes as tracers in studies on the mechanism of synthesis of yolk. Rana pipiens (Anura) b. Morphogenesis and metabolism of larvae after excision of heart. Rana pipiens and Amby stoma punctatum (Amphibia) KENT. D. E. A.B. — Dept of Zool.. Univ. of North Carolina. CHAPEL HILL. N.C., U.S.A. a. Effects of radio-isotopes on mitosis. Ambystoma maculatum (Urodela) (in collaboration with D. P. COSTELLO and Miss C. HENLEY) Kerr 51 Kn KERR. J. Graham Dr, Prof. (Emer.) — Dalney Veed, ROYSTON (Herts). Barley, England (U.K.) KESSLER, Miss H. F. B.Sc. — Zool. Lab. der Rijks Univ., Janskerkhof 3. UTRECHT. Holland a. Inhibition of HCn effects by calcium ions. Limnaea stagnalis (Gastro- poda) KIENY. Miss M. A. 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 la morphogenese et les besoins nutritifs des os de car- tilage en culture in vitro. Gallus gallus (Aves) b. Problemes relatifs aux causes de I'achondroplasie. Gallus gallus, var. Creeper (Aves) KIESSLING, K.-H. Fil.lic. — Inst, for Zoophysiol., Uppsala Univ.. UPP- SALA. Sweden a. MetaboHc reactions in egg cells. (Echinoidea) KIHLSTROM, J.-E. Fil.Mag. — Inst, for Zoophysiol., Uppsala Univ.. 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) KINDAHL, Miss M. E. Phil.Dr — Zootom. Inst., Univ. of Stockholm. 116 Drottninggatan, STOCKHOLM. Sweden a. The development of the teeth. (Insectivora) KING, T. J. B.S., M.S., Ph.D. — Lankenau Hospital Research Inst, and Inst, for Cancer Research, 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 (Anura) (in collaboration with R. W. BRIGGS) KING, T. S. M.B., Ch.B. — Dept of Anat., Fac. of Med., Univ. of Sheffield. SHEFFIELD, England (U.K.) a. Histological studies of the cardiac conducting system. Cetacea and Car- nivora (Mammalia) KLAPPER, C. E. A.B., Ph.D. — Univ. of Alabama. Med. Center, BIR- xMINGHAM 5. Alabama. U.S.A. a. Development of the pharyngeal derivatives. Cricetus cricetus (Rodentia) b. Development and structure of salivary glands. Cricetus cricetus (Ro- dentia) KLOFT. W. Dr rer.nat. — Inst, fiir Angewandte Zool. der Univ., Naturw. Fak., Rontgenring 10, WURZBURG, Deutschland a. Abhangigkeit der Entwicklung verschiedener cecidogener Pflanzenl'ause von der Gallenbildung. (Aphidoidea and Coccidoidea, Insecta) KNIGHT, Miss P. A.B., M.S. — Dept of Zool.. Univ. of Cahf.. LOS ANGELES 24, Cal.. U.S.A. Knight 52 Krab a. Biological characteristics of the developing blood of the embryo^ G^^^^^ domcsticus (Avcs) (in collaboration with A. M. SCHECHTMAN) KNIGHT-IONES. E. W. D.phil. — Marine Biol. Stat.. Univ. Coll. of N. Wales. BANGOR. N. Wales (U.K.) a Factors inducing metamorphosis in larvae of marine benthic inverte- brates. Spirorbis horealis (Polychaeta) and Balanus balanoides (Cirri- pcdia) , b. Comparative survey of ciliary metachronism in larvae. (Inuertebrata) KNOUFF. R. A. Ph.D.. Prof. — Dcpt of Anat.. Ohio State Univ.. CO- LUMBUS 10. Ohio. U.S.A. (no data received over some years) KOCHER. W. — Zool.-vergl. Anat. Inst.. Naturwiss. Fak.. Univ. Zurich. Kiinstlergasse 16. ZURICH 6. Schweiz (no data received over some years) KOECKE. U. Drphil. — Zool Inst, der Univ. Koln. Kerpenerstr. 13, KOLN-LINDENTHAL. Deutschland a. Krebsproblem als entwicklungsphysiologisches Problem. Mus (Rodentia) h. Problcme der Entwicklungsphysiologie. Columba (Aves) 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 (Anitra) (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) d. Regeneration of the midbrain in embryos and larvae. Rana, Bufo, Pseu- dacris, Xenopus (Anura) e. The normal development of the cells of the mesencephalic V nucleus. (Anura) f. Development of grafted heads (with special reference to the various parts of the brain), trunks and tails (with special reference to the spinal cord and ganglia). Rana, Ambystoma (Amphibia) K5NIGSBERG. I. R. A.B., Ph.D. — Div. of Chem. Embryol., Med. Center, Univ. of Colorado. 4200 East Ninth Ave. DENVER 20, Col.. U.S.A. a. Ontogeny of hormonal correlation of carbohydrate metabolism. Gallus domesticus (Aves) b. Histochemistry of the somite. Gallus domesticus (Aves) (in collaboration with H.HERRMANN) c. Effect of hormones on muscle development. Gallus domesticus (Aves) (in collaboration with H. HERRMANN) KONOPACKA. Mrs B. Dr. M.V.S.S. — Inst, of Histol. and Embryol., Acad, of Med., ul. Chalubinskiego 5, WARSZAWA. Poland (no data received on Nov. 1='. 1953) KOPSCH. Fr. F.I. I.E.. Dr Med.. Prof. (Emer.) — Archivstrasse 9, BER- LIN-DAHLEM. Deutschland (Anat. Inst, der Humboldt Univ., Ost- sektor) KRABBE. K. H. Dr Med. — Tornblad-Inst. of comp. Embryol., Biskops- gatan 7. LUND. Sweden (from Kommunehospitalet. COPENHAGEN, Denmark) (no data received on Nov. 1^', 1953) Krai 53 Kut KRAInSKA, Mrs M. K. Mag. of Sci. — Inst, of Histol. and Embryol.. Acad. of Med., ul. Chaiubinskiego 5. WARSZAWA, Poland (no data received on Nov. 1=', 1953) KRAUSE, W. DrMed. — Anat. Inst, der Univ. Wien, Wahringerstr. 13, WIEN IX, Oesterreich (no embryological work in progress) KRAUSS, M. Ph.D. — Biophysics Branch. Chemical Corps, Med. Labs, Army Chemical Center. EDGEWOOD. Md. U.S.A. (no data received on Nov. 1='. 1953) KRISZAT. G, Dr rer.nat. — Wenner-Grens Inst, for experimental Biology, Norrtullsgatan 16. STOCKHOLM Va.. Sweden (no data received on Nov. 1='. 1953) KROPP. B. N. A.M., Ph.D., Prof. — Med. School. Queen's Univ., KING- STON, Ont., Canada a. Egg membranes. Gallus domesticus (Aves) KUGLER, O. E. Ph.D., Assoc. Prof. — Dept of Zool.. Univ. of Illinois. URBANA, 111.. U.S.A. (no embryological work in progress) KQHN, A. DrPhil.h.c, Dr rer.nat., Prof. — Max Planck-Inst. fur Biol., Spemannstr. 34, TUBINGEN, Deutschland a. Wundheilung und Regeneration. Ephestia und Ptychopoda (Lepido- ptera) 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) e. Eiwachstum. (Cladocera. Crustacea) 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. KUIPER, Miss E. A. — Anat.-Embryol. Inst., Municipal Univ. of Amster- dam, Mauritskade 61, AMSTERDAM O, Holland a. Influence om metamorphosis on the different stages of regeneration. (Urodela) (in collaboration with H. A. L. TRAMPUSCH) KUNO, M. M.A. (Rigakushi) — The Sugashima Marine Biol. Stat., Na- goya Univ., SUGASHIMA-MURA. Shima-gun, Mie-ken. Japan a. Physiological studies on the cleavage of eggs. Hemicentrotus pulcher- rimus, 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 over some years) KUTSKY, R. J. A.B., M.A. — Dept of Zool., Univ. of Cahf., BERKELEY 4. Cal.. U.S.A. a. Fractionation of embryo extract for growth promoting factors in tissue culture. Gallus domesticus (Aves) Kut 54 Langm KllTSKY. Mrs P. B. A.B., Ph.D. — Dept of Zool., Univ. of Calif.. BER- KELEY 4. Cal.. U.S.A. (no embryological work in progress) KUUSI, Miss T. K. Dr Phil. — Zool. Lab., Univ. of Helsinki, Dept of Physiol.. P. Rautatiekatu 13. HELSINKI. Finland a. The chemical nature of specific inductive substances (isolated from liver and kidney of the guinea-pig), especially the inductive effects of protein and nucleic acid fractions of dead tissues. Tritunis (Urodela) h. Study on the process of induction caused by granular fractions containing ribonucleic acid marked with P;.o. analyzed by aid of radio-autographic methods. Triturus (Urodela) c. The chemical nature of specific inductive substances (bone marrow of the guinea-pig); role of the proteins and nucleic acids. Triturus (Urodela) d. The chemical nature of growth promoting substances (tissue extracts); role of the proteins and nucleic acids. Mus rattus (Rodentia) LALLIER. R. A. Dr es Sci. — Inst, de Biol, physicochimique, 13 Rue Pierre Curie, PARIS Ve, France a. Li et developpement embryonnaire, etude de la biochemie des embryons lithines. Rana fusca, Ambystoma mexicanum (Amphibia) h. Etude de I'induction. Triton taeniatus (Urodela) c. Insuline et developpement embryonnaire. Rana [usca (Anura) d. Etude de la determination. Rana fusca (Anura) , Paracentrotus lividus et Arbacia punctulata (Echinodermata) e. Le determinisme sexuel. Bonellia viridis (Chaetopoda) LAMY. F. M.A. — Dept of Biol., Massachusetts Inst, of Technol.. CAM- BRIDGE 39. Mass., U.S.A. (no data received over some years) 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 insulin 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. Med.Drs — Anat.-Embryol. Lab. der Rijks Univ.. Oostersingel 69. GRONINGEN, Holland a. Development of paraphysis and the circulation of the cerebrospinal fluid. Gallus (Aves) b. Development of meninges. Gallus (Aves) LANGMAN, J. Dr Med. — Anat. Embryol. Lab., Free Univ., Pr. Hendrik- laan 27. AMSTERDAM Z, Holland a. Teratogenetic effect of thyreoectomised pregnant animals on the deve- loping embryo. Rattus norvegicus albinus (Rodentia) (in collaboration with F. van FAASSEN) b. Influence of influenza-virus during pregnancy on the developing embryo. Mus musculus (Rodentia) (in collaboration with R. NIEUWENHUIS) c. Study of abnormal development by injecting methyl-thiouracil into eggs. Gallus domesticus (Aves) d. Joint development. Homo (Primates) e. Serological experiments with embryonic explanted tissues. Gallus domes- ticus (Aves) Lanz 55 Legr LANZAVECCHIA, G. Biol.Sc.Dr — 1st. di Zool. e Anat. Comp.. Univ. di Milano, Via Celoria 10, MILANO, Italia a. Chemical embryology (leading studies). LARAMBERGUE, M. de Dr es Sci., Prof. — Lab. de Zool.. Fac. des Sci., POITIERS, Vienne, France a. Recherches sur le developpement embryonnaire de I'appareil genital hermaphrodite. (Gastropoda) h. Differenciation des gametes chez des formes hermaphrodites. (Gastro- poda) LASH. J. W. — Dept of Zool.. Univ. of Chicago, CHICAGO 37, 111., U.S.A. a. Dynamics of wound healing. LATIMER, H. B. Ph.D.. Prof. (Emer.) — 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 (Lagomorpha) LEBLOND, C. P. M.D., Ph.D., Prof. — Dept of Anat., McGill Univ.. MONTREAL, Quebec, Canada a. Development of the thyroid gland. (Vertebrata) b. The development of bones and teeth as shown on 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. Alytcs obstetricans (Anura) LEFEBVRES— BOISSELOT. Mrs J. Dr es Sci. — Lab. d Embryol., Fac. de Med., 15 Rue Ecole de Med., PARIS Vie, France a. Teratogenese par carence en vitamines B. Mus rattus (Rodentia) b. 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, Urochordata) h. Differentiation and morphology of nervous tissue. (Coelenterata) c. Comparative neurology. (Vertebrata) d. Effects of antimitotics on regeneration of peripheral nerves and on metamorphosis. Rana. Bufo (Anura) (in collaboration with P. PAS- QUINI) 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 Sci.. Prof. — Lab. de Zool, Fac. des Sci., POI- TIERS, Vienne. France a. Determination et differenciation du sexe. (Oniscoidea et Cymothoidea, Isopoda, Crustacea) Legrand 56 Leo b. Divcloppcmcnt dcs coaptations. (Oniscoidea, Isopoda: Decapoda, Crus- tacea). (Insect a) c. Etude dc la croissancc. Porcellio dilatatus Brandt (Oniscoidea. Isopoda. Crustacea) et Anilocra physodes L. (Cymothoidea. Isopoda. Crustacea) d. Modalit^s dc la rdprodurtion. Platyarthrus schoblii (Oniscoidea. Isopoda, Crustacea) c. Analyse biom^trique des populations de deux especes socurs dans le nord ct Ic midi de la France. Philoscia muscorum Scopoli et P. affinis Verhoeff (Oniscoidea. Isopoda. Crustacea) LEHMAN, H. E. M.A.. Ph.D.. Assoc. Prof. — Dept of Zool.. Univ. of North Carolina. CHAPEL HILL. N.C., U.S.A. a. Studies on the behaviour, differentiation and metabolism of pigment cells as related to the establishment of specific pigment patterns of larvae and adults. Ambystoma and Triturus (Urodela) b. Studies on the relation of external media and physical surfaces on the migration and differentiation of tissues in vitro. Ambystoma and Triturus (Urodela) LEHMANN. F. E. F.I.I.E.. Dr Phil.. Prof. — Abt. fiir Zoophysicl.. Zool. Inst, der Univ., Sahlistr. 8. BERN. Schweiz a. Allometrisches Wachstum. (Amphibia) (in Zusammenarbeit mit diversen Mitarbeitern) b. Schwanzregeneration. normal und chemisch beeinflusst. Xenopus (Anura) (in Zusammenarbeit mit diversen Mitarbeitern) c. Elektronenmikroskopische Struktur von tierischen Eiern. Tubifex (Oligochaeta), (Echinodermata) . (Ascidiae) d. Regeneration (Bedeutung der I-Zellen). (Hydrozoa) (in Zusammen- arbeit mit P. T ARDENT) e. Erzeugung von Teratomen bei Larven. Xenopus (Anura) f. Schwellen- und Konkurrenzphanomene bei der Bildung der Hinter- extremitat. Xenopus (Anura) (in Zusammenarbeit mit P. A. TSCHUMI) LEHN, H. — Max Planck-Inst. fur Biol.. Spemannstr. 34, TUBINGEN. Deutschland a. Reparationsleistungen. Hydra (Hydrozoa) LEIBBRANT, Miss M. Cand.rer.nat. — Zool. Inst, der Univ.. Katharinen- str. 20. FREIBURG i. Brsg. Deutschland a. Entwicklung und Bedeutung der Vitellophagen. Apis mellifica (Hymeno- ptera) (gemeinsam mit M. SCHNETTER) LELIfiVRE. A. Anc. Chef de Travaux — Lab. d'Embrvol.. Fac de Med., 15 Rue Ecole de Med., PARIS Vie. France a. Etude des anomalies de divers types. Homo (Primates) LENDER. Th. Dr cs Sci.. 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 TUniversite. STRASBOURG, France a. Regeneration des yeux. Role du systeme nerveux dans la regeneration dcs yeux. Polycelis nigra (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) Lep 57 Linda LEPORI, N. G. Lib.Doc. Prof. — 1st di Zool. e Anat. Comp. dell'Univ., Via A. Volta 4, PISA, Italia a. Ovo- and spermatogenesis — chromosome cycle. Poly cells tenuis (Tur- bellaria) b. Ovo- and spermatogenesis — chromosome cycle. Helix adspersa (Gastropoda) c. Recherches sur la differenciation de la peau et de la pigmentation. (Aves) d. Ricerche sulla pigmentazione della pelle negli embrioni nelle culture sulla membrana corion-allantoidea. (Aves) LERMAN. L. Ph.D. — Div. of Chem. Embryol., Med. Center, Univ. of Colorado. 4200 East Ninth Ave. DENVER 20, Col.. U.S.A. a. Incorporation of labelled amino acids into protein fractions of muscle tissue. Gallus domesticus (Aves) (in collaboration with H. HERR- MANN) b. Protein chromatography on specific adsorbens. LEROY, P. J. M. Dr es Sci. — Lab. d'HistophysioL. Coll. de France. Place Marcelin Berthelot, PARIS Ve, France a. Development and physiology of the adrenals. Gallus, Anas (Aves) LEVER, J. Dr Phil.. Prof. — Zool. Inst., Free Calvinistic Univ.. Rapenbur- gerstraat 128, AMSTERDAM C. 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 i n v i t r o pendant I'accroissement. (Amniota) b. Recherches sur les caracteres de la structure et des proprietes biologiques dans les tissus cultives in vitro. (Amniota) LEVLMONTALCINI. 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) b. Effects of mouse sarcoma on growth in vivo and in vitro. Triturus (Urodela) LEVY, Mrs G. Dr es Sci.. laureat de I'Acad.Med. — Lab. d'EmbryoL, Fac. de Med., 15 Rue de I'Ecole de Med., PARIS Vie, France a. Vitamines chez la mere et le foetus. Mus rattus (Rodentia) b. Teratogenese par carence. Mus rattus (Rodentia) 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) LILLIE. R. S. Ph.D.. Sc.D. — Physiol. Lab.. Univ. of Chicago. CHICAGO 37, 111., U.S.A. (no data received on Nov. 1^'. 1953) 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 (Aves) h. Differentiation of sex in birds. Anas boschas (Aves) LINDAHL. P. E. F.I.I.E.. Fil. Dr. Prof. — Inst, for Zoophysiol.. Uppsala Univ.. UPPSALA, Sweden a. Large scale separation of macromeres, mesomeres and micromeres of the developing egg. (Echinoidea) Lindahl 58 Los b. The biochemical mechanism of the animahzation of the unfertiHzed egg. (Echinoidca) , r -^ c. The biochemical background for the vegetahzation of the egg by Li^ . (Echinoidca) d. The psysiology of ripening in spermatozoa. (Mammalia) e. The mechanism of agglutination of spermatozoa. (Mammalia) f. The primary sex rate. (Mammalia) g. Somatic reduction divisions in developing eggs. (Echinoidea) LINDBERG. N. O. H. Phil.Dr — Wenner-Grens Inst, for experimental Biology. Norrtullsgatan 16. STOCKHOLM Va.. Sweden (no data received on Nov. 1-', 1953) LINDSKOG. B. Med.kand. — Tornblad-Inst. of comp. Embryol.. Biskops- gatan 7. LUND. Sweden (no data received on Nov. 1", 1953) LIPSCHUTZ. A. M.D., Prof. — Depto de Med. Exper. del Servicio Nacional de Salubridad. Av. Irarrazaval 849. SANTIAGO. Chile. S. America (no data received on Nov. 1'', 1953) LISON. L. Prof. — Fac. de Med. de Ribeirao Preto, Univ. de Sao-Paulo. Bresil LITTLE. C. C. Sc.D.. Prof. — Jackson Memorial Lab., Box 558. BAR HARBOR. Me. U.S.A. (no data received over some years) 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 (Anthro- poidea) (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. b. Fate of cells of Clarke's nucleus following axon section. Felis domestica (Carnivora) LOECHER. Miss E. Cand.rer.nat. — Zool. Inst, der Univ.. Katharinenstr. 20. FREIBURG i. Brsg., Deutschland a. Keimblatterbildung und Differenzierungsleistungen in isolierten Eiteilen. Apis mcllifica (Ilymcnoptcra) (gemeinsam mit M. SCHNETTER) LOMBARD. G. L. M.Sc. (Pret.). Ph.D. (Utrecht) — Dept of Zool.. Fac. of Sci.. Univ. of Pretoria. PRETORIA. S. Africa a. Morphogenesis with special reference to the pectoral girdle. Chryscmys (Cryptodira. Testudinata) b. Further investigation into the secondary outgrowths in damaged em- bryos. Xenopus laevis (Anura) LOS, J. A. — Anat. -Embryol. Lab. of the Univ. of Leyden, Fac. of Med., Wassenaarseweg, Boerhaavekwartier. LEIDEN, Holland a. Normal and abnormal development of the heart. Homo and other Animalia (in collaboration with J. DANKMEIJER) Loss 59 Lutz LOSSEROY, J. — Lab. d'HistoL, Dep. d'EmbryoL, Fac. de Med., 31 Rue Lionnois, NANCY (Meurthe 6 Moselle), France a. Action de certaines substances chimiques sur les mouvements ciliaires et sur la motilite du spermatozoide. (Amphibia) (en collaboration avec A. DOLLANDER) L0VTRUP, S. Ph.D. — Cytochem. Dept, Carlsberg Lab., 8 Gl. Carlsberg- vej. COPENHAGEN Valby, Denmark a. Chemical differentiation during development. Enzymes and nucleic acids. Ambystoma mexicanum (Urodela) b. Metabolism during various stages of development measured by uptake and loss of radioactive COo. Ambystoma mexicanum (Urodela) LUCEY, E. C. A. B.Sc. — Inst, of Animal Genet., Univ. Dept of Genet., King's Buildings, West Mains Rd, EDINBURGH 9, Scotland (U.K.) a. 16-mm film of normal and mutant egg development. Drosophila melano- gaster (Dipteta) (in collaboration with S. J. COUNCE and D. A. EDE) b. 16-mm film of development, and of operative technique. Triton (Urodeia) (in collaboration with C. H. WADDINGTON) LODTKE, H. Dr, Prof. — Zool. Inst, der Univ., Katharinenstr. 20, FREI- BURG i. Brsg., Deutschland a. Entwicklung der Sehleistung. Notonecta glauca (Heteroptera, Hemi' pteroidea) b. Entwicklung der Sehleistung. Mus rattus (Rodentia) (gemeinsam mit G. HERMANN) c. Entwicklung der Sehleistung. (Lepidoptera: Culicidae, Diptera) (ge- meinsam mit G. HAAS und P. BUTZ) LUSCHER, M. Dr Phil. (Basel) — Zool. Anstalt. Univ. Basel, BASEL, Schweiz (and Swiss Tropical Inst., BASEL, Schweiz) a. Differentiation of castes in termites, especially the determination of supplementary reproductives in primitive termites. Kalotermes [lavicollis (Fabr.) (Isoptera, Insecta) h. Descriptive and experimental study of the glands producing moulting + metamorphosis hormones. Zootermopsis nevadensis (Hagen), (Isoptera, Insecta) LUTHER, W. DrPhil., Prof. — Zool. Inst, der Univ., MARBURG. Deutschland (no data received over some years) LUTZ, H. Dr es Sci., Prof. — Lab. de Zool., Fac. des Sci., 1 Avenue Ver- cingetorix, 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. Polyembryonie experimentale. Salmonidae (Teleostei) (en collaboration avec Mrs. Y. LUTZ— OSTERTAG) d. Formation de I'entoblaste. (Aves) LUTZ— OSTERTAG, Mrs Y. Dr 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, gener., 12 Rue de I'Universite, STRASBOURG, France a. La genese de Tasymmetrie du tractus genital et la regression des canaux de Miiller par la methode d'explantations. Gallus (Aves) Lutz-Ostcrtag 60 Mang b. Role dcs hormones dans la diffcrcnciation primaire du sexe. Gallus (Ares) (en collaboration avcc Et. WOLFF) c. Polyembryonie expcrimentale. Salmonidae (Teleostei) (en collaboration avec H. LUTZ) LYON Miss M F. Ph.D. — Med. Res. Council. Inst, of Animal Genet., King's Buildings. West Mains Rd, EDINBURGH 9. Scotland (U.K.) a. Developmental study of absence of otoliths. Mus musculus (Rodentia) b. Developmental study of the zigzag mutant. Mus musculus (Rodentia) MACKENZIE. J. Ph.D. — Dept of Pediatrics. Med. School, Univ. of Colorado. 4200 East Ninth Ave. DENVER 7. Col., U.S.A. (no data received on Nov. 1"'. 1953) 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 sperma- togenesis. (Mammalia) MAKINO, S. Nogakushi, Rigakuhakushi (Dr), Prof. — Zool. Inst., Fac. of Sci., Hokkaido Univ.. North 8. West 5. SAPPORO, Japan (no data received on Nov. l'^'. 1953) MALAMED. S. A.B., M.S. — Dept of Zool., Fac. of pure Sci., Columbia Univ.. Broadway and 116 St, NEW YORK 27, N.Y., U.S.A. a. Effect of high pressures of oxygen on development. Rana pipiens (Anura) MALAN. Miss M. E. D.Sc. — Zool. Inst.. Univ. of Stellenbosch. STEL- LENBOSCH, South Africa a. Gastrulation. Spheniscus demersus (Aves) MALTESE. Miss C. Dr — 1st. di Zool.. Via Archirafi 18. PALERMO, Italia a. Xenoplastic transplantations of entoderm. (Amphibia) MAN, J. C. H. de Physician — Anat.-Embryol. Lab. of the Univ. of Leyden, Fac. of Med., Wassenaarseweg, Boerhaavekwartier, LEIDEN, Holland a. Development of the suprarenal gland. Mus norvegicus albinus (Rodentia) MANARESI, Miss A. Dr Nat. Hist. — 1st. di Anat. Comp.. Via Belmeloro 8. BOLOGNA (103). Italia a. Histogenesis of motor nuclei of cranial nerves. (Vectebrata) 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) b. Enzymes and other substances in embryonic development. (Pulmonata, Gastropoda) MANDL. Mis A. M. B.Sc. (Lond.). Ph.D. (B'ham) — Dept of Anat., The Med. School. Birmingham Univ.. Edgbaston, BIRMINGHAM 15. Eng- land (U.K.) (no data received on Nov. 1", 1953) MANELLI. E. Ph. D. — 1st. di Anat. Comp.. Via Belmeloro 8, BOLOGNA (103). Italia a. Analysis of development of some proteins (antigen-reactions). (Am- phibia) 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 (llrodela) (gemeinsam mit O. J. STARK) Manh 61 Maz MANHOFF. L. J. M.D. — Rob't B. Green Hosp., SAN ANTONIO, Tex., 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) MARCHAND, J. M. M.Sc, Ph.D. — Division of Fisheries, Beach Road, Sea Point, CAPE TOWN, South Africa (no embryological work in progress) MARCHLEWSKI. J. H. Dr — Zakkd Anat. Porownav/czej U. J. im. H. Hoyera, sw. Anny 6, KRAKOW, Poland a. The rearing of European forms. Tetraonidae (Galliformes. Aves) MARCONNET, R. — Lab. d'Histol., Dep. d'Embryol., Fac. de Med., 31 Rue Lionnois. NANCY (Meurthe & Moselle), France a. Action teratogene de I'uree. (Amphibia) (en collaboration avec A. DOLLANDER) MARJANEN, P. — Zool. Lab., Univ. of Turku, TURKU, Finland (no embryological work in progress) MARKERT, C. L. Ph.D. — Dept of ZM.. Univ. of Michigan, ANN ARBOR, Mich., U.S.A. a. Influence of cellular genotype on subsirate specificity of tyrosinase in melanoblasts cultured in vitro. Gallus domesticus (Aves) and Pero- myscus maniculatus ( Rodentia) b. The effects of metabohte analogs on embryonic development. Rana pipiens (Anura) c. Relative roles of nucleus and cytoplasm in cell differentation. Rana pipiens (Anura) MARLIER, G. — Lab. de Zool., Fac. des Sci., Inst, de Zool. Torley-Rousseau, Univ. libre de Bruxelles, 50 Avenue F. D. Roosevelt, BRUXELLES, Belgique (no data received over some years) MARTIN, Miss B. A. Columbia Univ. M.A. and Ph.D. — Dept of Biol., Brooklyn Coll., Bedford Ave and Ave H, BROOKLYN 10, N.Y., U.S.A. a. Cytology and embryology. (Insecta) MASUDA, H. — Lab. of Embryol. and Exper. Morphol., Zool. Inst., Dept of Sci., Kyoto Univ., KYOTO, Japan a. Behaviour of phosphor in early development. Triturus pyrrhogaster (Urodela) b. Induction in regenerating blastema. Triturus pyrrhogaster (Urodela) c. Regional differences of induced structure. MASY, Miss S. — Inst. d'Anat., Univ. de Louvain, 38 Rue des Recollets, LOU VAIN, Belgique (no data received on Nov. 1^ 1953) MATHER. W. B. M.Sc. — Zool. Dept, Univ. of Queensland, George Str., BRISBANE, Queensland, Australia (no embryological work in progress) MAZIA, D. Ph.D. — Dept of Zool., Univ. of California, BERKELEY 4 Cal., U.S.A. a. Desoxyribonuclease in development. (Echinoidea) Mazia 62 Meln b. Nucleoprotcins of sperm. (Echinoidea) c. Isolation and biochemistry of mitotic apparatus in cleaving embryo. d. Embryology. Stronifyloccntrotus piirpuratus (Echinoidea) e. Embrvologv. Strcngylocentrotus franciscanus (Echinoidea) 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 radiation. Miis musculus (Rodentia) b. A physiological study of the amnion and placenta of the fetus. Mas musculus (Rodentia) McCALLION. D. J. B.A.. Ph.D., Prof. — Dept of Biol.. Acadia Univ., WOLFVILLE. Nova Scotia, Canada a. Histochemistry of bone development. Gallus domesticus (Aves) b. Effects of vitamin B^o and aureomycin on growth as revealed in mitotic activity. Mus musculus (Rodentia) McKEEHAN. M. S. M.S.. Ph.D. — Dept of Anat.. School of Med., 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 (Ares) b. The self-differentiating capacity of the developing lens as tested by transplantation experiments. Gallus domesticus (Ares) c. The distribution of ribose nucleic acid in the tissues of the eye during lens induction. Gallus domesticus (Ares) McKERROW, Miss M. J. Ph.D. — Dept of Zool.. Univ. of the Witwaters- rand. Milner Park. JOHANNESBURG. South Africa a. Embryonic development of the mammary glands. Elephantulus myunis jamesoni (Insectirora) McMINN. R. M. H. M.B.. Ch.B. — Dept of Anat.. Fac. of Med.. Univ. of Sheffield, SHEFFIELD. England (U.K.) a. Regeneration of intestinal mucosa. (Mammalia) McMURRAY, Miss V. M. A.B.. M.S.. Ph.D. — Hubrecht Lab.. Internat. Embryol Inst.. Janskerkhof 2. UTRECHT. Holland a. Development of the optic tectum. Cell size and number, as influenced bv raising in darkness. Xenopus laeris ( Anura) McNUTT, C. W. A.B.. M.S.. Ph.D. — Dept of Anat.. Med. Branch. Univ. of Texas, GALVESTON. Tex.. U.S.A. a. Analysis of morphological effects of the short ear gene. Mus musculus (Rodentia) b. Genetic study of susceptibility and resistance to 4 *^c NaCl in drinking water. Mus musculus (NH and I.H.B.) (Rodentia) MEDAWAR. P. B. M.A.. D.Sc. — Dept of Zool. and Comp. Anat.. Univ. Coll. London. Gower St. LONDON W.C.I. England (U.K.) a. Development of capacity to respond to antigens. Bos taurus i (Artio- dactyla) and Mus musculus (Rodentia) MELLANBV. Sir Edward — National Institute for Med. Research. Mill Hill. LONDON. England (U.K.) (no data received on Nov. 1". 1953) MELNOTTE. P. J. — Lab. dHistol.. Dep. d'Embryol.. Fac. de Med.. 31 Rue Lionnois. NANCY (Meurthe & Moselle), France Melnotte 63 Mif a. Etude des proprietes de permeabilite 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. The influence of unsaturated fatty acids on development. Oryctolagus cuniculus (Lagomorpha) h. New histochemical methods for demonstration of phospholipids and unsaturated fatty acids to be used for the study of developing adipose tissue. Oryctolagus cuniculus (Lagomorpha) MERRITT, Mrs J. K. M.S. — Dept of Embryol., Div. of Biol.. Calif. 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) MES, Miss A. B. M. B.Sc. — Zool. Lab. der Rijks Univ., Janskerkhof 3, Utrecht, Holland a. Influence of dinitrophenol on development. Limnaea stagnalis (Gastro- poda) METTETAL, C. Dr es Sci. — Lab. de Biol. Anim., Centre d'Etudes Sup. Sci., Avenue Biarnay, RABAT, Maroc a. La regeneration des membres, plus specialement la determination des parties du membre a I'interieur du bourgeon de regeneration. (Urodela) METZ. C. B. Ph.D. — Dept of Zool., Florida State Univ.. TALLAHAS- SEE, Florida, U.S.A. a. Electron microscopy of fibrillar systems. Paramecium and Tetrahymena (Protozoa) b. Specific interacting substance of eggs and sperm. (Echinodermata) MEYER. R. de — Inst. d'Anat.. Univ. de Louvain, 38 Rue des Recollets, LOUVAIN, Belgique (no data received on Nov. 1=', 1953) MIALHE, P. — Lab. d'Evolution des Etres organises, Fac. des Sci. de Paris, 105 Boulevard Raspail, PARIS Vie, France (no embryological work in progress) MICHAEL, M. I. B.Sc, M.Sc. — Dept of Zool., Alexandria Univ., Mo- harram Bey, ALEXANDRIA, Egypt a. The development of skull and visceral muscles during metamorphosis. Xenopus laevis (Anura) (Normal Table) (in collaboration with S. N. SEDRA) MICHON, J. Chef de Travaux — Lab. de Zool., Fac. des Sci., POITIERS, Vienne. France a. Croissance, regeneration. Lumbricidae (Oligochaeta) MICKIEWICZ. Miss Z. Physician — Inst, of Histol. & Embryol., Acad, of Med.. Narutowicza 60. LODZ. Poland a. Influence of sulphonamides on monstruosities in embryos. Gallus (Aves) b. Influence of sulphonamides on the size of embryos. Gallus (Aves) MIFUNE, S. — Biol. Inst.. Fac. of Sci.. Kyushu Univ.. FUKUOKA, Japan a. Li-effects on morphogenesis. Planaria gonocephala (Turbellaria), (Amphibia) b. Metabolism of amino acids in morphogenesis. Rana nigromaculata (Anura) Mij 64 Monne MIISBERG Miss M. B.Sc. — Hubrecht Lab.. Internal. Embryol. Inst.. Janskcrkhof 2. UTRECHT. Holland a. Spatial and temporal course of the neural activation. Tritums alpestns (Urodcla) MILLARD— BOKENHAM. Mrs N. A. H. Ph.D. — Dept of Zool., Univ. of Cape Town. Rondebosch. CAPE TOWN. S. Africa a. Complete development of the veins and arteries. Xenopus laevis (Anura) (Work complete but Normal Table still to be done) MILTENBURG. J. M.Sc. — Zool. Lab. der Rijks Univ., Janskerkhof 3. UTRECHT. Holland a. Normal development and cytology of the pineal region. Chamaeleo bitaeniatus and Mabuia megalura (Lacertilia) 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. Chemical and physiological investigations on the jelly. (Amphibia) MINTZ Miss B. M.S.. Ph.D., Asst Prof. — Whitman Lab., Univ. of Chicago. 5700 S. Ingleside. CHICAGO 37. 111.. U.S.A. a. Role of hormones in sex differentiation: in vivo paired explants of embryonic gonads in direct contact, or separated by a membrane barrier. Gallus domesticus (Aves) b. Histochemical studies on oviduct regression, and on appearance of oviduct asymmetry in the female embryo. Galhis domesticus (Aves) MIYAMORI-YAMAMOTO. H. M.Sc. — Lab. Exper. 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 the gonad. Hynobius nebulosus (Schlegel) (Urodela) MOFFETT. Jr. B. C. A. B. (Zool.), Ph.D.(Anat.) — Univ. of Alabama.. Med. Center, BIRMINGHAM 5. Alabama, U.S.A. a. Embryology of the temporomandibular joint. Rattus norvegicus (Roden- tia) b. Embryology of the temporomandibular joint. Homo sapiens (Primates) 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 dc Investig., Minist. de Salud Publ. de la Nacion. Bolivar 1128, BUENOS AIRES, Argentina (no data received on Nov. 1". 1953) MONTEFOSCHI, Miss E. Dott. Sci. Biol. — Stazione Zool. di Napoh. NAPOLI. Italia (no data received on Nov. l"'. 1953) MONTEROSSO. B. Prof.ord.. Dir. — 1st. di Zool. e Anat. comp., Via Androne 25, CATANIA, ItaUa (no data received over some years) MONN£. L. Phil. Dr. Assoc. Prof. — Statens veterinarmedic. anstalt. Dept of Parasitol.. STOCKHOLM 50. Sweden a. Life cycles and developmental physiology of parasitic worms. (Nema- toda) Monr 65 Moric MONROY. A. M.D., Prof. — 1st. di Anat. Comp., Univ. di Palermo, Via Archirafi 18, PALERMO, Italia PALERMO. Italia a. Interaction between jelly-coat and sperm. (Echinodermata) b. Analysis of the activation reaction in the egg. (Echinodermata) MOOG. Miss F. Ph.D., Assoc.Prof. — Dept of Zool., Washington Univ.. Lindell and Skinker Aves, ST LOUIS 5, Mo.. U.S.A. a. Development of enzyme systems in the embryo. Gallus domesticus (Aves), (Mammalia) MOOKERJEE, S. M.Sc. Ph.D. — Cell Research Unit. Chittaranjan Cancer Hospital, CALCUTTA 26, India a. Studies on the chemical basis of tissue formation. Gallus (Aves), Rana. Bufo (Anura) b. Nucleus-cytoplasm interaction. Amoeba (Protozoa) c. Cell-chemistry of normal and carcinomatous cells. Homo (Primates) (in collaboration v/ith P. DE) d. Cytochemical studies of the radiation action on embryonic cells. Gallus (Aves) (in collaboration with A. BOSE) 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) MOORE, Mrs B. C. A.B., A.M.. Ph.D. — Dept of Zool.. Fac. of pure Sci.. Columbia Univ.. Broadway and 116 St, 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 Zool.. Univ. of Chicago. CHICAGO. 111., U.S.A. (no data received over some years) MOORE, J. A. A.B.. M.A.. Ph.D.. Prof. — Dept of Zool.. Fac. of pure Sci.. Columbia Univ., Broadway and 116 St. NEW YORK 27, N.Y., U.S.A. a. Gastrula ectoderm competence and dorsal hp potency in hybrid embryos tested by xenoplastic and heteroplastic transplantations to diploid hosts. Rana pipiens ? x Rana clamitans $ (Anura) b. Embryology. Australian frogs (Anura) MOOY, Miss H. W. B.Sc. — Zool. Lab. der Rijks Univ.. Janskerkhof 3, UTRECHT. Holland a. Influence of calcium and cyanide on anaerobious effects. Limnaea stag- nalis (Gastropoda) MORI, H. M.A., Dr Agri., 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) MORICARD. R. Dr en Med.. Dr es Sci. — Lab. d'Hormonol. et Cytol. exper., Ecole des Hautes Etudes. Univ. Hopital Broca, 111 Rue L. M. Nordmann, PARIS XIIK France a. Recherches sur la maturation de I'ovocyte. Oryctolagus cuniculus (Lago- morpha) Moricard 66 Mus b. Rcchcrches sur la fccondation dc lovocytc. Onjctolagus cimiculus (Lago^ c. D^coltition du dichlorophenol indophenol (DPIP) par lovocyte. Etude par micro-injection quantitative. M^'^/nuscalus (^^denUa) {en colla- borat.on avec Miss M. M. C. S. GOTHIfi et O. BAIOCCHI) d Utilisation des traceurs dans Tetude dcs correlations unissant les gonado- ■ trophines. le liquide folliculaire et la maturation oyulaire. Mus mtzscu/us (Rodcntia) (en collaboration avec Miss M. M. C S. GOTHIE) c. Film 16 m.m. sur la fonction meiogene du liquide folliculaire. Mas mus- cuius (Rodcntia) . , , , , r- r. j i-r: i j MORLON Miss C. — Lab. d'EmbryoI.. Fac. de Med.. 15 Rue de 1 Ecole de Med.. PARIS Vie, France a. Retentissement des privations doxygene et intoxication par le CU sur des embryons. Homo (Primates) et Mus rattus (Rodentia) MOSSMAN. H. W. Ph.D.. B.S.. M.S.. Prof. — Dept of Anat.. Univ. of Wisconsin. MADISON, Wis., U.S.A. a. Comparative morphology of the fetal membranes and reproductive tracts. (Mammalia) MOTOMURA. I. DrSc, Prof. — Lab. of Embryol., Inst, of Biol., Tohoku (Imperial) Univ.. SENDAI, Japan (no data received over some years) MUCHMORE W. B. Ph.D. — Dept of Biol.. Coll. of Arts and Sciences. Univ. of Rochester. ROCHESTER 3. N.Y.. U.S.A. a. Early differentiation of trunk mesoderm. Ambystoma maculatum (Uro- dela) MULLIGAN. W. J. M.D. — Free Hospital for Women. 245 Pond Ave. '^ROOKLINE. 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, J. ROCK and Miss E. C. ADAMS) MULNARD. J. M.D. — Lab. d'Anat. et d'EmbryoI.. Fac. de Med. de rUniv.. 97 Rue aux Laines. BRUXELLES. Belgique (no data received on Nov. l^'. 1953) MUN. A. M. — Dept of Zool.. Indiana Univ.. BLOOMINGTON, Ind., U.S.A. a. A comparative study of the development of antigenic properties of G- and F-proteins in the early embryo. Gallus gallus (Aves) b. Analysis of the effects of adult or late embryonic tissue transplants on homologous tissues of the host embryo. Gallus gallus (Aves) — Selec- ' tive transfer of radioactivity from grafts to homologous host tissues, (in collaboration with J. D. EBERT) 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 and Chclonia) . Gallus domcsticus (Aves) h. Development i n v i t r o of the scleral bones. Gallus domesticus (Aves) c. Development of secondary cartilage. Gallus domesticus (Aves) MUSTAKALLIO. M. M.D.. Prof. — Dept of Anat.. Fac. of Med.. Hel- sinki Univ., HELSINKI. Finland (no data received over some years) Nace 67 Newton NACE. G. W. A.B.. M.A., Ph.D. — 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) NAKAMURA. O. Ph.D., Prof. — Lab. of Morphol.. Osaka Liberal Arts Univ., IKEDA, Osaka Pref., Japan a. Map of presumptive regions and formative movements. Tritunis, Hy- nobius, 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. of Sci.. Nagoya Univ., Chigusa-Ku, NAGOYA, Japan a. Respiratory metabolism during early development. Experiments with Cartesian divers. Otyzias latipes (Teleostei) h. Studies on the biochemistry of fertilization with special consideration to the role of SS-linkages. Hemicentrotus pulcherrimus (Echinoidea) 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. Nitrogen excretion during regeneration. Carcinus moenas Leach (Deca- poda, Crustacea) NEEDHAM. J. F.LLE.. Dr. Prof. — Gonville and Cains Coll.. CAM- BRIDGE, England (U.K.) (no data received) NEF. W. — Zool. Inst, der Univ. Bern. Sahlistr. 8, BERN, Schweiz a. Entwicklungsphysiologie einer Fliigel-Borsten-Mutante. Drosophila (Diptera) (in Zusammenarbeit mit S. ROSIN) NEIGER, M. Dr Med. — Inst. d'Anat., Fac. de Med., Univ. de Geneve, 20 Rue Ecole de Med., GENEVE, Suisse a. Etude du developpement de I'articulation temporo-mandibulaire. NEW, D. A. T. B.A. — Dept of Embryol.. Univ. Coll. London, Gower St. LONDON W.C.I, England (U.K.) a. Environmental effects on development. Gallus domesticus (Aves) 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. Development. Drosophila (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, D. R. B.Sc, Ph.D. — Dept of Zool. and Comp. Anat., Univ. Coll. London, Gower St. 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) c The development of skeleton and muscles of the pelvic girdle and hind hmbs. Xenopus laevis (Anura) (Normal Table) NEWTON, B. L. B.A.. M.D.C.M. — Dept of Pathol.. Coll. of Med., Baylor Univ., 1200 M.D. Anderson Blvd. Texas Med. Center. HOUSTON 5. Tex., U.S.A. (no embyrological work in progress) Nich 68 Nieuwk NICHOLAS. J. S. Ph.D., Prof. — Osborn Zool. Lab., Yale Univ., NEW HAVEN 11. Conn.. U.S.A. a. Studies on the egg. Mus norvegicus (Rodentia) b. The development of actomyosin in developing muscle. Mus norvegicus c. The interaction of the roof of the archenteron upon the nervous system. Ambystoma piinctaturn (Urodela) d. Determination times of tissues and organs. Mus norvegicus (Rodentia) e. Factors underlying embryonic form. f. Development of nucleic acids in embryos. Mus norvegicus (Rodentia), (Amphibia) g. Development of acidphosphatase. Mus norvegicus (Rodentia) (Am- phibia) h. Centrifugation and transplantation of eggs. Mus norvegicus (Rodentia) j. Culture of eggs and embryos. Mus norvegicus (Rodentia) NICOLA, Mis M. DE Dr Sci. — Centro di Studio per la Biol, del C.N.R., Stazione Zool., NAPOLI, Italia a. Continued investigations on the role of pigment in morphogenesis. (Echi- nodcrmata) (in cooperation with A. MONROY) NICOLETTI, B. Dott. — 1st. di Biol. gen.. Fac. di Med., S. Pietro. PERU- GIA. Italia a. Anclli die Liesegang e sviluppo embrionale. Bufo (Anura) h. Perossidasi ed emoglobina durante lo sviluppo embrionale. Bufo vulgaris (Anura) NIESSING, K. Dr Med., a.o. Prof. — Anat. Inst, der Univ., Robert Koch- str. 6, MARBURG,Lahn, Deutschland a. Entwicklung der autonomen Ganglien. Xenopus (Anura) NIEUWENHUIS. R. — Anat.-Embryol. Lab., Free Univ., Pr. Hendriklaan 27, AMSTERDAM Z, Holland a. Influence of influenza-virus during pregnancy on the developing embryo. Mus musculus (Rodentia) (in collaboration with J. LANGMAN) NIEUWKOOP, P. D. Phil. Dr — Hubrecht Lab., Internal. Embryol. Inst.. Janskerkhof 2, UTRECHT. Holland a. 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. Triturus alpestris, taeniatus and cristatus (Urodela) (in collaboration with S. TOIVONEN) b. Experimental analysis of the gastrulation process (vital staining and transplantation). Xenopus laevis (Anura) c. Descriptive and experimental analysis of the ..germinal plasm" in the egg. 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 species (Urodela) e. Analysis of the changes in neural and epidermal competence of the ectoderm during development. Ambystoma mexicanum (Urodela) {. Analysis of the neural induction and subsequent organization of the central nervous system. Gallus domesticus (Aves) g. Electron-microscopical analysis of induction and activation of the central nervous system. Gallus domesticus (Aves) Nieuwkoop 69 OB h. The influence of the Li ion on the development of the larval (trocho- phore) and adult organ systems (segments). Nereis limbata (Annelida) NIGTEVEGHT, G. van — Hubrecht Lab., Internat. Embryol. Inst., Jans- kerkhof 2. UTRECHT, Holland a. Spreading of neural activation in competent ectoderm in explants. (Urodela) NIJENHUIS, E. D. M.Sc. — Zool. Lab. der Rijks Univ.. Janskerkhof 3, UTRECHT. Holland a. Analysis of the phase specificity in the sensitivity of the egg te Li-ions. Limnaea stagnalis (Gastropoda) NILSSON, Miss A. E. A. Fil.Mag. — Inst, for Zoophysiol., Uppsala Univ.. UPPSALA. Sweden a. The mechanism of agglutination of spermatozoa. (Mammalia) NISHIITSUTSUJI. Miss J. — Lab. of Embryol. and Exper. MorphoL. Zool. Inst., Dept of Sci., Kyoto Univ.. KYOTO, Japan a. Hormonal mechanism of metamorphosis. Bombyx mod, Luehdorfia japonica, Philosamia cynthia ricini (Lepidoptera) (in collaboration with M. ICHIKAWA) 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 migratory behaviour of single neural crest melanoblasts isolated in capillary tubes of extremely small bore. (Amphibia) (in collaboration with V. C. TWITTY) c. The role of mesodermal cells in epidermis formation. (Amphibia and Mammalia) NUESCH. H. DrSc. P.D. — Zool. Anstalt der Univ., Rheinsprung 9. BASEL. Schweiz a. Einfluss des Nervensystems auf die Entwicklung anderer Organe. Telea polyphemus (Saturnidae, Lepidoptera) b. Entwicklung der imaginalen Muskeln. Telea polyphemus (Saturnidae, Lepidoptera) NYHOLM. K. G. Fil.Dr — Zool. Inst., Uppsala Univ., UPPSALA, Sweden a. Study of the development. (Echinodeddae, 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.. Australia a. Ezymatic 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.. 1217 West Wis- consin Ave. MILWAUKEE 3. Wis., U.S.A. a. Regression of larval and adult limb and tail following exposure to X-rays or denervation. Tdturus viddescens and Ambystoma punctatum (Uro- dela) b. Spindle-cell sarcoma of adult animals. Triturus viridescens and Am- bystoma punctatum (Urodela) OBi 70 Oli c. Radioscnsitivity in relation to temperature prevailing during exposure. Rana catcshiana, Rana pipicns. Triturus viridescens (Amphibia); Mus rattus (Rodcntia) and On/ctolagus cuniculus (Lagomorpha) O'CONNOR R. J. M.D.. D.T.M. — Westminster Med. School. Horsferry Rd. LONDON S.W.I. England (U.K.) a. The metabolism of cell division and 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 a. Limb induction. Hynobius tokyoensis (Urodela) b. Budding in various species, f.. Compound" Ascidiae) c. Experimental studies on metamorphosis in various species. ('..Compound" Ascidiae) OKADA. T. — Lab. of Embryol. and Exper. Morphol., Zool. Inst.. Dept of Sci.. Kyoto Univ.. KYOTO. Japan a. Developmental mechanism of entoderm differentiation. Triturus pyrrho- gastcr and Hynobius nebulosus (Urodela) b. kole of the yolk mass in early morphogenetic movement. Triturus pyrrho- gaster and Hynobius nebulosus (Urodela) c. Regional differences of induced structure. OKADA. Y. K. F.I. I.E., Dr. Prof. — Zool. Inst.. Fac. of Sci., Tokyo Univ., TOKYO. Japan OKAZAKI, Miss K. — Embryol. Section, Dept of Biol.. Tokyo Metropolitan Univ.. Setagaya-ku. TOKYO. Japan a. Metamorphosis of partial larvae. Peronella (Clypeastroidea, Echinoidea) b. A study of skeleton formation. (Echinodermata) OKAZAKI. R. M.A. (Rigakushi) — Biol. Inst., Fac. of Sci.. Nagoya Univ.. Chigusa-Ku. NAGOYA. Japan a. Studies on the proteins of the early embryo. ( 1 ) Fractionation and 'physico-chemical characterization of the proteins; (2) Inducing capacity of the various proteins; (3) Regional and temporal changes of the protein fractions; (4) Physical effects of Li and SCN on the proteins; (5) In- ducing capacity of the organizer region free from nucleic acids. Triturus (Urodela) (in collaboration with S. OSAWA) b. Role of energy-rich phosphate bond in the cortical change of eggs. Va- rious species (Echinodermata) c. Effect of dinitrophenol on the organizer action. Triturus (Urodela) OKSCHE. A. A. Dr Med. — Anat. Inst, der Univ., Robert Kochstr. 6. MARBURGLahn. Deutschland a. Anderungcn dcs Kaulquappen-Wachstums nach beiderseitiger Augen- Extirpation. Es soil hierbei die Rolle des Hypophysen-Zwischenhirn- Systems und der Epiphyse untersucht werden. Bu[o vulgaris (Anura) b. Die Feinstruktur der Sinneszellen des Organon frontale bei qualitativ und quantitativ modifiziertem Lichtreiz. Verhalten der spezifischen, mit Eisen-Haemotoxylin farbbaren Zellstrukturen wahrend des Individual- zyklus. Bufo 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 over some years) Ols 71 O2 OLSSON R. Fil.mag. — Zootom. Inst., Univ. of Stockholm, 116 Drottning- gatan, STOCKHOLM, Sweden a. Development of the anterior hypophysis. Larus tidibundus (Aves) Polypterus (Brachiopterygii) OMODEO, P. Dr Sci. — 1st. di Biol, e Zool. gen., Fac. di Med.. Piazza S. Agostino 4, SIENA, Itaha (no data received on Nov. 1=', 1953) OORT, J. — Lab. for Exper. Histol., Fac. of Med., Univ. of Leyden, Wasse- naarseweg, 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 heterocUtus (Teleostei) ORLANDI, Miss A. Dott Sci Biol. — 1st. di Zool. e Anat. Comp., Univ. di Milano, Via Celoria 10, MILANO, Itaha a. Nucleoproteins and chromosomes. (Vertebrata) b. Yolk granula. (Amphibia) ORSINI, Mrs M. C. WARD — Ph.D.. B.A. — Dept of Anat., Univ. of Wisconsin. MADISON. Wis.. U.S.A. a. Fetal membranes, giant cells, and pregnancy changes in uterine vessels. Cricetus auratus (Rodentia) ORSKA, Miss J. Ph.D. — ZaWad. Anat. Porownawczej. Inst. Zool. Uniw., ul. Sienkiewicza 21, WROCLAW. Poland a. Development of the vertebral column centra. (Salmonidae and Cyprino- dontidae, Teleostei) ORTOLANI, Miss G. Dr — 1st. di Zool.. Via Archirafi 18, PALERMO, a. Morphogenetic movements. (Ascidiae) Italia b. Structure and potencies of the egg before cleavage. (Ascidiae) ORTS LLORCA, F. Prof. — Lab. de Anat. y Embryol., Fac. de Med.. CADIZ. Spain a. Embryology of the lungs. (Mammalia) h. Cyclopy. Homo sapiens (Primates) OSAWA, S. M.A. (Rigakushi) — Biol. Inst., Fac. of Sci., Nagoya Univ., Chigusa-Ku, NAGOYA, Japan a. Studies on the proteins of the early embryo. ( 1 ) Fractionation and psysico-chemical characterization of the proteins; (2) Inducing capacity of the various proteins; (3) Regional and temporal changes of the protein fractions; (4) Physical effects of Li and SCN on the proteins; (5) Inducing capacity of the organizer region free from nucleic acids. Triturus (Urodela) (in collaboration with R. OKAZAKI) b. Role of pentose-nucleic acid in protein synthesis of various embryonic tissues. (Vertebrata and Evertcbrata) c. Biochemical and histological studies of oogenesis. Triturus pyrrhogaster (Urodela) (in collaboration with Y. HAYASHI) OVERTON, Mrs J. Dr — Dept of Zool.. Univ. of Chicago. CHICAGO 37. 111., U.S.A. a. Mitogenesis. OZBURN, R. H. B.S.A., M.Sc. — Dept of Entomol. and Zool., Ontario Agricultural Coll.. GUELPH, Ont., Canada a. Gassing effects in eggs during incubation. Meleagris (Galli. Aves) n J 72 P^st Padoa '^ PADOA. E. Dr. Prof. — 1st. di Biol, e Zool. gen., Fac. di Med., Piazza S. Agostino 4. SIENA, Italia (no cmbryological work in progress) ^ , ^, , PADYKLILA. M.ss H. A. B.S.. M.A., Ph.D. — Dept of Obstetrics and Anat.. Harvard Med. School. 25 Shattuck Str.. BOSTON 15, Mass., U.S.A. , , . , a. Histochemical studies on the liver of the embryonic and post-natal animal to determine the onset of functional activities. Rattus norvegicus (Ro- PAI S. F.I. I.E.. Dr rer.nat. — Lab. of Developm. Physiol., Inst, of Exper. ' Biol., Acad.* Sinica. 865 Chang Ning Rd. SHANGHAI, China (no data received over some years) ^,.^r^x,^ PALAZZO. Miss F. Dr — 1st. di Zool., Via Archirafi 18, PALERMO, Italia a. Xenoplastic entoderm transplantations. (Amphibia) PANTELOURIS. E. M. B.Sc. (Athens and London) — Inst, of Animal Genet.. Univ. Dept of Genet.. King's Buildings. West Mains Rd, EDIN- BURGH 9, Scotland (U.K.) a. Ovary transplants for detection of host effects on growth and antigenic properties. Drosophila (Diptera) h. Transplantation of nuclei. Triton (Urodela) (in collaboration with C. H. WADDINGTON) PARI, F. Dott. in Sci. — 1st. di Zool. e Anat. Comp. deH'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 (no data received on Nov. 1"^', 1953) PARIS, Miss A. J. B.Sc. — Hubrecht Lab., Internat. Embryol. Inst., Jans- kerkhof 2, UTRECHT, Holland a. Preparation of the catalogue of the Central Embryological Collection of slides and ale. material of the Hubrecht Laboratory. (Mammalia) 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 on the development of the free living stages. CBursate Nematoda) PASCHMA. M. M.Ph. — ZaWad Zool. Ogolnej, Inst. Zool. Uniw. we Wroclawiu. ul. Sienkiewicza 21, WROCLAW. Polska (Poland) (no data received over some years) PASQUINI. P. Ph.D., Prof. — 1st. di Anat. Comp.. Via Belmeloro 8. BOLOGNA (103), Italia a. Effects of antimitotics on early development and on lens-regeneration. Rana esculenta, Triton and Amby stoma (Amphibia) (in collaboration with Miss I. DE CESARE) b. Effects of antimitotics on the regeneration of peripheral nerves. (Uro- dela and Anura) (in collaboration with S. LEGHISSA) c. Effects of low temperature on early development. (Amphibia) (in colla- boration with L. RAUNICH) 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, Belgique Pasteels 73 Piatt a. Cytochemical observations on the first developmental stages. (Amphibia) (in collaboration with J. L. A. BRACKET) b. 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 over some years) 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) 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) b. Ontogeny of the skull. Polypterus (Crossopterygii) PENFOLD, R. A.B. — Dept of Anat., Med. School, Univ. of Kansas, LAWRENCE, Kansas, U.S.A. a. Reconstruction of brain and cranial nerves of the first 4 Coghill stages. Amby stoma maculatum (Urodela) (in collaboration with P. ROOFE) PENTZ, Miss K. M.Sc. — Zool. Inst.. Univ. of Stellenbosch. STELLEN- BOSCH, South Africa a. Ontogenesis of the skull. Hynobius [uscus (Urodela) PERLMANN, H. P. — Wenner-Grens Inst, for experimental Biology, Norr- tullsgatan 16, STOCKHOLM Va., Sweden (no data received on Nov. 1^', 1953) PERRI, T. Dott., Prof. — 1st. di Anat. Comp. dell'Univ., Fac. di Sci., Via Borelli 50, ROMA. Italia a. Ricerche sull'induzione di arti sopranumerari. (Anura) h. Trapianti embrionali di abbozzi di arti. (Anura) c. Esperienze sulla regione sacrale. (Anura) d. La simmetria speculare in biologia. e. Esperienze sulla competenza embrionale e larvale. PESONEN, S. K. Dr phil. — Dept of Physiol.. Zool. Lab.. Fac. of Mathem. and Nat. Sci., Univ. of Helsinki, F. Rautatiekatu 13, HELSINKI. Fin- land a. On the effect of acetic acid on the early ontogenetic development. Tri- turus (Urodela) PETER, K. F.I.I.E., Dr, Prof. (Emer.) — BIRKENSTEIN. Post FISCH- BACHAU, Oberbayern. Deutschland PFLUGFELDER, O. Dr rer.nat.. Prof. — Zool. Inst, der Landwirtschaftl. Hochschule. STUTTGART-HOHENHEIM. Deutschland a. Anderung des Stoffwechsels nach Storung des hormonalen Gleichge- wichts. (Insecta) h. Entwicklungsphysiologie von Schwanzmissbildungen. (Aves) c. Einfluss der Pinealektomie auf die Postembryonalentwicklung. Lebistes reticulatus (Teleostei) 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. a. Regeneration of central nervous system in embryonic and adult stages. Ambystoma punctatum and tigrinum (Urodela) Piatt 74 Quenu b. Nerve pattern in heterotopically transplanted embryonic limbs. Ambys- toma punctatum and tigrinum (Urodela) PIEPHO H Dr Phil Prof. — Zool. Inst, der Univ. Gottingen., Mathem.- Naturw. Fak.. Bahnhofstr. 28. GOTTINGEN, Deutschland a. Metamorphose. Galleria mellonella (Lcpidoptera) PIERAGNOLI. U. — 1st. di Zool. e Anat. Comp. dell'llniv.. Via A. Volta 4. PISA. Italia a. Gametogenesis and cytology. Dugesia lugubhs (Turbellaria) PINCUS G Dr. Prof. — Worcester Foundation for Exper. Biology. 222 Maple Ave. SHREWSBURY, Mass.. U.S.A. (no data received on Nov. I'''. 1953) 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) 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 lacvis (Anura) (Normal Table) POLLICITA. Miss M. Dr — 1st. di Zool.. Via Archirafi 18, PALERMO, a. Xenoplastic parabiosis. (Amphibia) Italia 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 II, Conn., U.S.A. a. Mid-gut: genesis and differentiation. Drosophila melanog aster (Diptera) h. Chromosomal control of differentiation. Drosophila melanog aster (Diptera) PRETO PARVIS, Mrs V. Dott.Med., Prof. — 1st. di Anat. umana norm. deirUniv. di Milano, Via MangiagaUi 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 matrrity (Methods: Piekarsky-Robinow; Feulgen: Golgi: Cajal). (Mammalia) b. Morphological and histochemical studies of histogenesis of chondroid and mucous tissues. (Aves and Mammalia) c. 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 cysto-colic fold. Omentum colicum Halleri and other derivatives of the right part of the Omentum mains. Homo sapiens (Pri- mates) b. Involution of omphalomesenteric artery. Homo sapiens (Primates) PROP. N. B.Sc. — Anat.-Embryol. Lab. der Rijks Univ., Oostersingel 69, GRONINGEN, Holland a. Development of the egg by means of vital staining. Ambystoma (Uro- dela) QUfiNU, L. DrenMed. — Lab. des Travaux Anat., Fac. Med. Nouvelle. 43 Rue des St Peres. PARIS Vie. France a. Developpement de I'appareil respiratoire. Homo (Primates) Quer 75 Raw QUERNER. H. Dr rer.nat. — Inst, fiir exp. Krebsforschung der Univ. Hei- delberg. Vossstrasse 3, HEIDELBERG. Deutschland a. Hormonphysiologische Untersuchungen. (Cyprinodontidae, Teleostei) h. Dif ferenzierung primarer und sekundarer Geschlechtsorgane in vitro (Cyprinodontidae, Teleostei) RADECKA, Mrs E. M.Ph. — Zaklad Zool. Ogolnej. Inst. Zool., Uniw. we Wrodawiu, ul. Sienkiewicza 21, WROCLAW, Polska (Poland) (no data received over some years) RAMSEY, Miss E. M. A.B., M.D. — Dept of Embryol., Carnegie Inst, of Washington, Wolfe and Madison Sts. BALTIMORE 5, Md, U.S.A. a. Placentation. Study of marginal sinus and venous drainage of placenta. Macaca mulatta (Primates) RAMULT. M. Ph.D. — Dept of Zool., Univ. of Edinburgh, West Mains Rd, EDINBURGH 9, Scotland (U.K.) (no data received on Nov. 1"'. 1953) 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., Ph.D., Prof. — 1st. di Zool. e Anat. Comp., Univ. di Milano, Via Celoria 10, MILANO, Italia a. Proteins in embryonic determination. (Echinodermata and Amphibia) b. Protoplasmic structure. RANZOLI, F. Dr — 1st. di Zool. e Anat. comp.. Via Universita 4, MO- DENA, Italia a. Nucleolar changes and cycle of the ribonucleic acids during oogenesis. Patella coerulea (Gastropoda) b. Sexual differentiation and hermaphroditism. Hydroides norvegica (Sec- pulidae, Polychaeta) RAPPAPORT Jr. R. B.S.. M.S., Ph.D. — Biol. Dept, Union Coll., SCHENECTADY 8, N.Y.. U.S.A. (no data received on Nov. \'\ 1953) RAUNICH, L. Ph.D.. M.D. — 1st. di Anat. Comp., Via Belmeloro 8. BOLOGNA (103), Italia a. Development of blood and vascular system. Petromyzon (Cyclostomata) , Amia and Lepidosteus (Holostei) h. Action of growth-substances on tail-regeneration. Rana, Bufo (Anuta) c. Determination of neural plate. Triton, Ambystoma (Urodela) d. Neural crest development. (Amphibia) e. Effect of low temperature on early development. (Amphibia) (in colla- boration with P. PASQUINI) f. Action of carcinogenic hydrocarbons. (Amphibia) g. Ketosteroids during development (chemical detection). (Amphibia) RAVEN, Chr. P. F.I.I. E., F.R.A., Dr Sc, Prof. — Zool. Lab. der Rijks Univ., Janskerkhof 3, UTRECHT, Holland a. Analysis of lithium action. Limnaea stagnalis (Gastropoda) (in collabo- ration with Miss C. DINGER, W. J. van DONGEN, B. de GROOT, Miss H. E. van HEYNINGEN and C. R. JANSSENl b. Influence of lithium on morphogenesis. Aplysia limacina (Gastropoda) RAWLES, Miss M. E. Ph.D. — Dept of Biol., The Johns Hopkins Univ. Charles and 34th Sts, BALTIMORE 18, Md, U.S.A. Rawlcs 76 Reyer a. Analysis of the development of regional differences in feather color pattern. Factors affecting the distribution and development of melanin pigment-forming cells. Galliis domcsticiis (Aves) 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 domes- ticus (Ares) 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) REAMS Jr. W. M. B.S. — Dept of Biol., The Johns Hopkins Univ.. Charles and 34th Sts. BALTIMORE 18. Md. U.S.A. a. The cytology of differentiating neural crest cells utilizing phase micro- scop v. Gallus domesticus (Aves) REILLY. T. D. M.B.. Ch.B. — Dcpt of Anat., Univ. of Liverpool, LIVER- POOL, England (U.K.) a. Regeneration of the thyroid gland following ischaemia. (Mammalia) REINBOLD, R. 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, STRASBOUPG, France a. Differenciation sexuelle normale et conditionnement hormonal du tuber- cule genital chez I'embryon. Gallus (Aves) b. Le developpement et la differenciation de I'oeil en cultures in vitro. Gallus (Aves) REIS. R. H. Ph.D. — Dept of Biol., Marquette Univ., 1217 West Wisconsin Ave. MILWAUKEE 3, Wis., U.S.A. a. A study of the anomalous renal vessels and inferior vena cava. Canis [amiliaris and Fclis domestica (Carnivora) h. A study of the anomalous renal vessels and inferior vena cava. Homo sapiens (Primates) REMOTTI. E. Dott. Med.e Chirurg., Prof. — 1st. di Anat. e Fisiol. Comp., Univ. di Genova, GENOVA, Italia a. Correlazioni embrionali. Antagonismo epitelio vasi. b. Correlazioni epitelio vasi e loro importanza nella genesi delle neoplasie. REVERBERI. G. F.I. I.E.. Dr. Prof. — 1st. di Zool., Via Archirafi 18, PALERMO. Italia a. The morphogenetic role of the yolk material, studied by means of hetero- specific transplantations and of treatment with chemical substances. (Amphibia) Urochordata) b. The development of the egg after treatment with chemicals. (Ascidiae, REYER. R. W. Ph.D. — Dept of Anat., School of Med., Univ. of Pitts- burgh. PITTSBURGH 13, Pa, U.S.A. a. .^n 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) Reyer 11 Roll 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. Tritums viddescens, Ambystoma punctatum (Utodela) 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 Sts, BALTIMORE 5, Md. U.S.A. a. Fetal vascular physiology. Homo, Lepus and Ovis (Mammalia) h. Uterine contraction patterns. Homo (Primates) c. Pulmonary vasculature, fetal and neonatal condition. Ovis (Artiodac- tyla) d. Architecture of umbilical blood vessels, distended and non-distended. Homo (Primates) RHODES, S. A. M.A. — Franklin Coll.. FRANKLIN, Ind., U.S.A. a. Further histochemical study of lens development. Hyla versicolor (Anura), Ambystoma punctatum (Urodela) 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. (no data received on Nov. 1=', 1953) RINALDINI, L. M. — Strangeways Research Lab., Wort's Causeway, CAMBRIDGE, England (U.K.) (no data received on Nov. 1*', 1953) RINGERTZ, N. — Embryol. Dept., Histol. Inst., Karolinska Inst., Solna- vagen 1, STOCKHOLM 60, Sweden a. Incorporation of sulphur in fetus. Rattus norvegicus and Cavia cobaya (Rodentia) (in collaboration with U. FRIBERG) 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, Italia (no data received over some years) ROBERTSON, G. G. 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) ROCK, J. M.D. — Free Hospital for Women, 245 Pond Ave, BROOK- LINE, Mass., U.S.A. — Harvard Univ. Med. School, Dept of Gynecology, 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, W. J. MULLIGAN and Miss E. C. ADAMS) ROLLHAUSER, H. Dr Med. — Anat. Inst, der Univ., Robert Kochstr. 6. MARBURG/Lahn, Deutschland a. Anderungen 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 untersucht in alien Altersstadien von der Geburt an. Cavia cobaya (Rodentia) ROLLHAUSER— ter HORST, Mrs J. O. B. Dr rer. nat. — Anat. Inst, der Univ., Robert Kochstr. 6, MARBURG/Lahn, Deutschland Rollhauscr-t. U. 78 Rost a Rcaktion verschicdcn vorbehandcltcn Gastrula-Ektoderms auf denselben hcteroqcncn Induktor. Behandlung der Gastrulae mit Hormoncn, Nat-. Butylalkohol u.a. Mit dem isolierten Ektoderm dieser Gastrulae werdeu StiJcke crwachscner Triton-Leber umhullt. Triton alpestns (Urodela) ROMANKOWA Mrs A. M.Sc. — Zaklad Anat. Porownawczcj. Inst. Zool. Uniw.. ul. Sicnkiewicza 21. WROCLAW. Poland a. Development of sesamoid bones in the carpus. (Rodentia, Insectwora) RONCORONI. G. — 1st. di Anat. umana norm, dell'llniv. di Miiano. Via Manq.agaili 31. MILANO. Italia ,r. ^ • . a Histochemical study of histogenesis of cartilage. Mus 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) ROON A. C. de B.Sc. — Zool. Lab. der Rijks Univ., Janskerkhof 3. UTRECHT. Holland a Influence of heat shock. Limnaea stagnalis (Gastropoda) (in collabora- tion with G. A. VAN ERKEL and A. M. STADHOUDERS) b. Development of diencephalon. Torpedo marmorata (Selachii) ROOSEN-RUNGE E. C. M.D. — School of Med.. Univ. of Washington, SEATTLE 5, Wash., U.S.A. a. Quantitative studies in spermatogenesis. (Mammalia) ROSE. S. M. Ph.D., Prof. — Dept of Zool., Univ. of lUinois, URBANA, 111., U.S.A. a. Embryological studies in relation to regeneration, tumor formation and specific inhibition of embryonic differentiation. Rana, various spec. (Anura) ROSENBAUM, R. M. B.S.. Ph.D. — Biol. Lab.. Harvard Univ., CAM- BRIDGE 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 Flugelenwicklung. Drosophila (Diptera) (in Zusam- menarbeit mit W. NEF) ROSS, Miss J. R. W. B.Sc, M.B.. Ch.B. — Anat. Dept, Charing Cross Hosp. Med. School. 62 Chandos Place. LONDON W.C.2. England (U.K.) a. The development of the genital tract. Ovis anes (Artiodactyla) 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) b. Analysis of formative movements during neurulation (with vital stains). (Amphibia) ROSTAND. J. — 29 Rue Pradier, VILLE d'AVRAY, (Seine-et-Oise). France a. Parthenogcncsc et gynogenese. Regulation chromosomique par le froid. (Amphibia) b. Mutations ( Polydactylie, Ectrodactylie, etc.): comportement hereditaire ct physiologie genetique. (Amphibia) Rostand 79 Sala 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. — Div. of Chem. Embryol., Med. Center, Univ. of Colorado, 4200 East Ninth Ave. DENVER 20, 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) ROZEWSKA. Miss J. W. Physician — Inst, of Histol. & Embryol., Acad, of Med., Narutowicza 60, LODZ, Poland Gallus (Aves) a. Influence of sulphonamides on the development of germinal layers. 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 Zool. Lab., Yale Univ., NEW HAVEN 11, Conn. — Dept of Pharmacol., the N.Y. Psychiatric Inst., 722 W. 168 St, NEW YORK 32, N.Y., U.S.A. a. Protein-synthesising mechanisms in development. Gallus (Aves) RUGH, R. A.B., M.A., Ph.D. — Radiological Research Lab., Dept of Radiology, Coll. of Physicians & Surgeons, Columbia Univ., 630 West 168th Str., NEW YORK 32, N.Y., U.S.A. a. Radiobiology. b. Experimental Embryology. c. Effect of ionizing radiations on the fetus. RUNNER, M. N. Ph.D. — Roscoe B. Jackson Mem. Lab., BAR HARBOR, Me, U.S.A. (no data received on Nov. 1=', 1953) RUNNSTROM, J. A. M. F.I.I.E., Ph.D., M.D., Prof. — Wenner-Grens Inst, for experimental Biology, Norrtullsgatan 16, STOCKHOLM Va., U.S.A. (no data received on Nov. 1^', 1953) RUUD, Miss G. Cand. real. — Zool. Lab., Univ. of Oslo, OSLO-BLIN- DERN, Norway a. Anatomical investigation of forelimbs transplanted to the hindlimb region in embryos. Ambystoma mexicanum (Utodela) RYKE, P. A. J. M.Sc, Ph.D. — Dept van Dierkunde, Potchefstroom Univ., POTCHEFSTROOM. Suid-Afrika (no data received on Nov. 1=', 1953) 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) SACERDOTE, Miss M. Dr — Inst, of comp. Anat., Via Giovanni Giohtti 34, TORINO, Italy (no embryological work in progress) SALA, M. Dr — 1st. di Zool. e Anat. Comp., Fac. di Sci., Via Loredan 6, PADOVA, Italia a. Neurogenesis. (Amphibia) Sah 80 Sax SALZGEBER. Miss B. Lie. ^s Sci. — Lab. de Zool. de la Fac. des Sci. et Lab. dEmbryol. 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 se.xuelle. b. Recherches sur I'interse.xualite e.xperimcntale produite par irradiation aux rayons X. (Aves) (en collaboration avec Et. WOLFF) c. Action de substances chimiques sur les gonades embryonnaires cultivees in vitro. SANDE. Miss A. van der B.Sc. — Hubrecht Lab., Internat. Embryol. Inst., Janskerkhof 2, UTRECHT, Holland a. Analysis of the extra-neural extension of the activation field in normal development. (Urodela) SANDISON, Miss E. E. B.Sc. (Hons) — Dept of Zool.. Univ. of Edin- burgh. West Mains Rd, EDINBURGH 9, Scotland (U.K.) a. The indentification 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 St, LONDON W.C.I. England (U.K.) a. Regeneration and induced proliferation in the adult. Rattus norvegicus (Rodentia) (in collaboration with M. ABERCROMBIE) SATO. T. D.Sc. Dr Phil, nat.. Prof. — Biol. Inst., Fac. of Sci., Nagoya Univ., Chigusa-Ku. NAGOYA, Japan a. Linscnbildende Potenz des Pigmentepithels. Hynobius tokyoensis (Uro- dela) und Rana tcmporaria (Anura) b. Linsenregeneration. Cobitidinae fund verwandte Teleostei) SAUNDERS. J. W. B.S.. M.S.. 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) h. 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) 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) b. Histophysiologie und quantitative Cytologie. 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 over some years) SAXfiN, L. O. M.A., B.M. — Zool. Lab., Univ. of Helsinki. Dept of Physiol., P. Rautatiekatu 13, HELSINKI, Finland a. The development of the visual cells. The development of the photo- mechanical movements. Rana temporaria L. and Xenopus laeuis (Anura) Saxen 81 Schr b. The appearance of mitoses in the retina during the development (col- chicin studies). Rana temporaria L. and Xenopus laevis (Anura) SCHECHTMAN. A. M. F.I.I.E., A.B., Ph.D.. Prof. — Dept of Zool.. Univ. of Cahf., LOS ANGELES 24. Cal.. U.S.A. a. Surface active materials: quantitative changes during the course of development. b. Studies of the lipid in the serum of the developing embryo. (Jallus do- mesticus (Aves) (in collaboration with E. WELLER) c. Biological characteristics of the developing blood of the embryo. Gallus domesticus (Aves) (in collaboration with Miss P. KNIGHT) d. Electrophoresis of serum of the developing embryo. Gallus domesticus (Aves) (in collaboration with W. G. HEIM) e. Stabihty of cellular particulates in developing tissues and in neoplasms. (Aves and Mammalia) (in collaboration with A. A. HIRATA) f. Induction of neural plate by dead and modified embryonic tissues. Hyla regilla (Anura) (in collaboration with A. S. SMITH) SCHEIE— PFLEGER. Mrs D. 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. Role des hormones dans la differenciation sexuelle. Etudes biochimiques sur la regression des canaux de Miiller. Gallus (Aves) SCHENK. R. DrMed. — Anat. Inst, der Univ.. Gloriastr. 19. ZURICH. Schweiz a. Untersuchungen iiber den Implantationsvorgang. unter besonderer Be- riicksichtigung des Verhaltens der Ribonukleinsaure. Hemicricetus auratus (Rodentia) b. Untersuchungen iiber die Wirkung von Nitrogen Mustard auf die em- bryonale Entwicklung. Triton (Urodela) SCHJEIDE, A. E. A.B.. M.S.. Ph.D. — Dept of Zool.. Univ. of Calif.. LOS ANGELES 24. Cal.. U.S.A. a. Inorganic ions of serum in the developing embryo. Gallus domesticus (Aves) SCHNEIDER. R. Dr med. — Dr Senckenberg. Anat. Inst.. Med. Fak. der Univ., Ludwig Rehnstr. 14, FRANKFURT/Main-Siid, Deutschland a. Development of the skull. Brady pus tridactylus (Edentata, Mammalia) SCHNETTER, M. Drphil. — Zool. Inst, der Univ., Katharinenstr. 20, FREIBURG i. Brsg., Deutschland a. Keimblatterbildung und Differenzierungsleistungen in isolierten Eiteilen. Apis mellifica (Hymenoptera) (gemeinsam mit Miss E. LOECHER) b. Entwicklung und Bedeutung der Vitellophagen. Apis mellifica (Hymen- optera) (gemeinsam mit Miss M. LEIBBRANDT) c. Eibildung bei Arbeiterinnen (Drohnenmiitterchen). Apis mellifica (Hy- menoptera) (gemeinsam mit Miss H. DREISCHER) 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. dell'Univ.. PARMA, Itaha a. Bone induction. (Amphibia) Schw 82 Sens SCHWARTZ. V. — Max Planck-Inst. fur Biol., Spcmannstr. 34. TUBIN- GEN. Deutschland a. Ontogcncsc dcs Flugelmusters. Plodia (Lepidoptera) SEDRA. S. N. B.Sc. M.Sc, Ph.D.. F.Z.S. — Dept of Zool.. Alexandria Univ.. Moharram Bey. ALEXANDRIA. Egypt a. Stages in normal development. Bufo regulads (Aniira) b. The development of skull and visceral muscles during metamorphosis. Xcnopits laci'is (Anura) (Normal Table) (in collaboration with M. I. MICHAEL) c. The segmentation of the urostyle. Bu[o regularis (Anura) SEIDEL F. Dr Phil.. Prof. — Max Planck-Inst. f. Tierzucht und Tier- ernahrung. (20a) MARIENSEE Kreis NEUSTADT a. Rubenberge. Deutschland a. Morphologische und physiologische Untersuchungen an der embryonalen Entwicklung. Ori/ctolagus cuniculus (Lagomotpha) b. -Morphologische und physiologische Untersuchungen an der embryonalen Entwicklung. Platycnemis (Diptera), Gryllus (Orthoptera) und Ascaris (Nematoda) SELMAN. G. G. Ph. D. — Inst, of Animal 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. (Insecta). (Invertebrata) h. Some measurement of morphogenetic forces and the mechanical proper- ties of the tissue concerned. (Amphibia) c. Effect of ultrasonics on embryonic development. Drosophila melano- gaster (Diptera) (in collaboration with. Miss S. J. COUNCE) d. Electron microscope study of cytoplasmic inclusions. (Amphibia) (in collaboration with Mrs R. M. CLAYTON— FREEDMAN) SEMBRAT. K. Ph.D.. Prof. — Zakiad Zool. Ogolnej. Inst. Zool. Uniw. we Wrociawiu, ul. Sienkiewicza 21. WROCLAW. Polska (Poland) (no data received over some years) SEMBRATOWA. Mrs Z. M.D.. Prof. — Zakiad Histol. i Embryol.. Akad. Medycznej. ul. Chalubinskiego 6a, WROCLAW. Polska (Poland) (no data received over some years) SENGEL, Ph. J. 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. Sur les conditions de la regeneration normale du pharynx. Dugesia (= Euplanaria) lugubris O. Schm. (Turbellaria) h. Developpement du systeme nerveux et de la pigmentation de la peau de I'embryon en cultures in vitro. Gallus (Aves) 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) b. Developmental anomalies of the vertebrae, meninges and spinal cord. Homo sapiens (Primates) c. The normal and abnormal development of the skull and its related structures. Homo sapiens (Primates) Sensenig 83 Sil d. Failure of development of the optic nerves and its effect upon the structure of the cortical and subcortical visual centers. Homo sapiens (Primates) e. Causative factors underlying developmental anomalies. SHANER, R. F. Ph.D., F.R.S.C, Prof. — Dept of Anat., Univ. of Alberta, Med! School, EDMONTON, Alberta. Canada a. A study of abnormal hearts in embryos corresponding to the third month of human development. Sus scrofa (Artiodactyla) b. Study of a collection of abnormal embryos of an age corresponding to the third month of human development with the aim of throwing light on the development of various human abnormalities. Sus scrofa (Artio- dactyla) c. Study of the development of truncus arteriosus persistens communis in abnormal hearts. Sus scrofa (Artiodactyla) SHANNON, J. E. — Dept of Zool., Univ. of Connecticut, STORRS, Conn., U.S.A. a. Factors affecting reaggregation and segregated cells in tissue culture, (in collaboration with H. CLARK) 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. CO- LUMBIA, 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) d. Studies on effect of mitochondria on early morphogenesis. Rana pipiens (Anura) SHEN, S. C. Ph.D. — Osborn Zool. Lab., Yale Univ., NEW HAVEN 11. Conn., U.S.A. a. Development of the cholinergic system in brains. Ambystoma. Triturus and Rana (Amphibia) 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). Prionosthenus sp.. Anacridium aegyptium, Pareuprepocnemis syriaca, Pezotettix judaic a and Calliptamus sp. (Acrididae, Orthoptera) , Decticus albifrons (Tetti- goniidae, Orthoptera), Latrodectus XIII guttatus Rossi (Theridiidae, Araneida) SIGOT, A. — Inst, de Zool., Lab. de Biol, gen., Fac. des Sci. de Strasbourg, 12 Rue de I'Universite, STRASBOURG. France a. Etude de la sensibilite hereditaire au gaz carbonique. Drosophila melano- gaster (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 m^etamorphosis. Pho- ronis hippocrepia, miilleri, pallida, ovalis (Phoronidea, Tentaculata) Sine 8^ ^"^'^^^ SINCLAIR I G B.S.. M.S.. Ph.D.. Prof. — Dept of Anat., Med. Branch. Un.v. of Texas. GALVESTON. Te.x.. U.S.A. a. Early embryos, structure, conditions of implantation. Homo (Primates) 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 tmncatus, Oryctolagus cuniculus, Mus musculus and Homo (Mammalia) d. Continued study of developmental anomalies. Brain. Heart. Mus mus- culus and Homo (Mammalia) c. General review of urethan mechanism of action. f. Continued study of transplacental effects of urethan. Mus musculus (Rodentia) SINGER M. A.M., Ph.D.. Prof. — Dept of Zool., Cornell Univ., ITHACA, N.Y.. U.S.A. (no data received on Nov. 1". 1953) 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., Ph.D. — Dept of Biol.. The Johns Hopkins Univ.. BALTIMORE 18. Md, U.S.A. a. Metabolic differentiation in relation to the sensitivity of gene action to X-irradiation. Drosophila melanogaster (Diptera) SKREB. N. M.D. — Inst, de Biol., Fac. de Med., Salata. ZAGREB, You- goslavie a. Cytologie 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. Poznaii, ul. Swiecickiego 6. POZNAN, Pologne SMITH. A. S. A.B. — Dept of Zool., Univ. of Calif., LOS ANGELES 24. Cal., U.S.A. a. Induction of neural plate by dead and modified embryonic tissues. (Amphibia) (in collaboration with A. M. SCHECHTMAN) SMITH. Miss B. T. — Dept of Biol., Hamilton Coll.. McMaster Univ.. HAMILTON, Ontario. Canada a. Survey of the embryonic development. Petromyzon marinus (Cyclos- tomata) SMITH. S. M.A.. Ph.D. — Dept of Zool., Univ. of Cambridge, Downing Street, CAMBRIDGE, England (U.K.) a. Weight of egg influencing time sequences of metabolism. Salmo Irideus (Teleostei) b. Anterior-posterior reversal of archenteron roof at gastrula stage. Triturus alpestris, Ambystoma mexicanum (Urodela) SMITHBERG.M. A.B. (Biol.) — Dept of Biol.. Coll. of Arts and Sci.. Univ. of Rochester. ROCHESTER 3, N.Y., U.S.A. (no data received on Nov. 1", 1953) Smithb 85 Spr SMITHBERG. M. Ph.D. — Roscoe B. Jackson Mem. Lab . BAR HARBOR. Me. U.S.A. a. Maternal influences upon prenatal development. Mus musculus (Ro- dentia) b. Factors influencing survivability of transplanted ova. Mus musculus (Rodentia) SMRECZYnSKI. S. Ph.D. — Zool. Dept of the Jagellonian Univ.. KRA- KOW, St Anne 6. Poland (no data received on Nov. 1^'. 1953) SNELLEN. H. A. Med.Dr — Anat.-Embryol. Lab. of the Univ. of Leyden. Wassenaarseweg, Boerhaavekwartier. LEIDEN. Holland a. Heart and vessels in congenital malformations. Homo (Primates) (in collaboration with J. DANKMEIJER) SNOOK. T. B.Sc. M.Sc. Ph.D. — Dept of Anat., School of Med.. Univ. of North Dakota. GRAND FORKS. N. Dak.. 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) SNYDER. F. F. M.D., A.M.. Prof. — Dept of Obstetrics and Anat., Har- vard Med. School. 25 Shattuck St, BOSTON 15, Mass.. U.S.A. a. Action of analgesic agents on fetal respiration — Meperidine and levo- isomethadone. Lepus cuniculus L. (Lagomorpha) h. Antidotal action of N-allylnormorphine to depression of fetus by morphine, meperidine, levo-isomethadone. Homo sapiens (Primates) SOBELS. F. H. Ph.D. — Genet. Inst, der Rijks Univ., Stationsstraat 9. UTRECHT. Holland a. Genetics and developmental physiology of the mutant type "Asym- metric" with special reference to its abnormal abdomen character. Drosophila melanogaster Meigen (Diptera) SPIRITO. A. Dott.. Prof. — 1st. di Biol, gen., Fac. di Med., S. Pietro, PERUGIA. Italia 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. Localization of enzyme activity. 2. Structural integrity and enzyme activity. Gallus do- mesticus (Aves) c. Regeneration. Planaria spec. (Turbellaria) and Tubularia spec. (Coel- entetata) d. Cytological study of the developmental center (organizer). Gallus (Aves) Sr 86 Stephan SRIVASTAVA. M. D. L. D.Sc. F.N.A.Sc. — Zool. Dept, Allahabad Univ., ALLAHABAD. India a. Experiments on the Wolffian regeneration of the lens. Rana tigrina b. Effects of thermal shock on the embryonic development. Rana tigrina STADHOIIDERS. A. M. B.Sc. — Zool. Lab. der Rijks Univ.. Janskerkhof 3. UTRECHT. Holland a. Influence of heat shock. Limnaea stagnalis (Gastropoda) (in collabora- tion with G. A. van ERKEL and A. C. de ROON) STARCK, D. F.I.I. E.. Drmed.. o. Prof. — Dr Senckenberg. Anat. Inst., Med. Fak. der Univ.. Ludwig Rehnstr. 14. FRANKFURT/Main-Sud, Deutschland a. Chondrocranium and osteocranium. Scotophilus temmincki and Myotis myotis (Microchiroptera) h. Chondrocranium and osteocranium. especially orbitotemporal region of skull. Struthio, Siila. 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 (iirodela) (gemeinsam mit O. MANGOLD) STEFANELLI. A. F.I. I.E.. Dr. Prof.ord. — Lab. di Istol. ed Embriol. della Fac. di Sci.. Univ. di Roma. Via A. BoreUi 50. ROMA, Italia a. Histogenetic determination and differentiat-'on of nervous cells. (Te- leostei. Amphibia and Ares) b. Degeneration and regeneration of nervous cells. (Teleostei, Amphibia and Ares) STEINER. H. Ph.D.. Prof. — Zool.-vergl. Anat. Inst.. Naturwiss. Fak.. Univ. Zurich. Kiinstlergasse 16. ZURICH 6. Schweiz (no data received over some years) STEINERT. M. Lie. Sci. Zool. — Lab. de Morphol. anim., Fac. des Sci., Univ. libre de Bru.xelles, 1850 Chaussee de Wavre, BRUXELLES- Auderghem. Belgique a. Studies on nucleic acid synthesis during morphogenesis. (Amphibia) b. Etude des purines libres dans I'embryon. Rana, Pleurodeles, Ambystoma STEINITZ. H. Ph.D. — Dept of Zoology. Hebrew Univ., JERUSALEM, Israel a. Regeneration of retina from transplanted retinal pigment epithelium. Triturus r. viridescens (Iirodela) (in collaboration with L. S. STONE. New Haven) b. The role of retinal pigment cells in various types of retinal injuries. Triturus r. viridescens (Urodela) (in collaboration with L.S. STONE) c. Role of endocrines in regeneration of the retina and lens. Triturus r. riridescens (Urodela) (in collaboration with L. S. STONE) d. Postembryonal development of the eye. Pelobates syriacus (Anura) STEPHAN. Fr. DresSci. — Lab. de Zool. de la Fac. des Sci. et Lab. dEmbryol. 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 va.sculaire extraembryonnaire et son extension. Developpement du coeur et des gros troncs arteriels de I'embryon. Gallus gallus (Ares) Stephan 87 Struch b. Etude experimentale des anomalies et des suppleances vasculaires dans I'aire extraembryonnaire et Tembryon. Gallus gallus (Aves) STEPHAN— DUBOIS, Mrs Fr. DresSci. — 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 declenchent cette migration. Etude de I'arret de la migration. Euplanaria lugubds (Turbellaria) b. Migration des neoblastes dans la regeneration. Tubifex tubifex et Lum- briculus variegatus (Oligochaeta) STEPHENSON, N. G. M.Sc. — AUCKLAND Univ. Coll., New Zealand (no data received over some years) STICH, H. Drrer.nat. — Max Planck-Inst.. WILHELMSHAVEN, Deutschland (no data received on Nov. 1^'. 1953) STOCKARD, A. H. Ph.D. — Dept of Zool., Univ. of Michigan, ANN ARBOR, Mich., U.S.A. a. Early development. Osmerus motdax (Malacopteiygii, Teleostei) 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 Trituvus V. viridescens (Urodela) c. Factors controlHng the inhibition and release of lens regeneration. (Urodela) d. 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 viridescens, Salamandra salamandra, Ambystoma punctatum (Urodela) (in collaboration with R. W. REYER, Pittsburgh) e. Regeneration of retina from transplanted retinal pigment epithelium. Triturus v. viridescens (Urodela) (in collaboration with H. STEINITZ) f. The role of retinal pigment cells in various types of retinal injuries. Triturus v. viridescens (Urodela) (in collaboration with H. STEINITZ) g. Role of endocrines in regeneration of the retina and lens. Triturus v. viridescens (Urodela) (in collaboration with H. STEINITZ) 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 withE. S. CRELIN) STRAUSS. F. M.D. — Anat. Inst., Biihlstr. 26, BERN, Schweiz a. The oviduct during the passage of the egg. (Mammalia) h. Comparative implantation. (Mammalia) c. Comparative development of the brain. Cricetus auratus (Rodentia) (in collaboration with K. FEREMUTSCH. Waldau-Bern) STRUCHLY, Z. Dr — Zakiad Zool. Ogolnej. Inst. Zool.. Uniw. we Wroclawiu, ul. Sienkiewicza 21. WROCLAW. Polska (Poland) (no data received over some years) Strud 88 Takam STRUDEL G. DresSci. — Lab. de Zool. de la Fac. dcs Sci. et Lab. d'Embryol. ct Teratol. cxper. du C.N.R.S.. Inst, de Zool. et de Biol, gen., 12 Rue de lUniversite, STRASBOURG, France a. Les correlations nerveuses chez I'embryon, etudiees par les methodes d'cxcision chirurgicale. Origine des ganglions rachidiens et du systemc sympathique. Gallus gallus (Aves) b. Lc role du systeme nerveux et de la chorde dorsale dans la differen- ciation des Vertebres. Gallus gallus (Aves) STUART E. G. Dr — Dept of Anat., School of Med., Univ. of Pennsyl- vania, PHILADELPHIA 4. Pa, U.S.A. a. Factors influencing regeneration of nerve fibers in the central nervou.s system of adult animals. Felis domestica (Carnivora), (Anthropoidea) (in collaboration with W. F. WINDLE and J. L. LITTRELL) b. Growth and regeneration of the severed spinal cord in embrvos. Gallus domcsticus (Aves) (in collaboration with W. F. WINDLE and J. L. LITTRELL) SU. Tchou DresSc. — Lab. of Developm. Physiol., Inst, of Expcr. Biol., Acad. Sinica. 865 Chang Ning Rd, SHANGHAI, China (no data received over some years) SUGIYAMA, M. Dr Sc. — The Sugashima Marine Biol. Stat.. Nagoya Univ.. SUGASHIMA-MURA, Shima-gun, Mie-ken. Japan a. Physiological studies on fertilization and artificial parthenogenesis. Hemicentrotus pulcherrimus. Pseudocenttotus depressus ( Echinoidea) (in collaboration with M. ICHIKAWA) SULLIVAN, G. E. M.Sc. — Dept of Zool., Univ. of Sydney, SYDNEY, N.S.W.. Australia a. Development of musculature in the wing. Gallus domesticus (Aves) SUNDELL. Mrs G. Fil.Kand. — Inst, for Zoophysiol.. Uppsala Univ., UPPSALA, Sweden a. The primary sex rate. (Mammalia) SUNDELL. L. E. Fil.Mag. — Inst, for Zoophysiol.. Uppsala Univ.. UPP- SALA, Sweden, a. Physiological and chemical studies in yolk. (Amphibia. Pisces and Mammalia) SWEDMARK. G. G. Fil.lic. — Inst, for Zoophysiol.. Uppsala Univ., UPP- SALA, Sweden a. Sulphate metabolism in development. (Echinoidea) SZARSKI. K. W. Ph.D. — ZakJad 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) TAHARA. Y. — Lab. of Morphol.. Osaka Liberal Arts Univ.. IKEDA. Osaka Pref., Japan a. Study of development. Cipago paludina japonica (Gastropoda) b. Tail formation. Rana nigromaculata and Rana japonica (Anura) c. Formation of digestive tract. Rana, Triturus, Hynobius (Amphibia) TAKAMOTO, K. M.Sc. — Lab. Exper. Embryol.. Inst, of Polytechn.. Osaka City Univ.. Minami-Ogimati, Kita-ku, OSAKA, Japan a. Histochemical study of gonadogenesis. Triturus pyrrhogaster (Boie) and Hqnobius nebulosus (Schlcgel) (Urodela) Takamoto 89 Thomason b. The role of the entoderm in the development of mesodermal organs. Triturus pyrrhogaster and Hynobius nebulosus (Urodela) TAKATA, K. M.A. (Rigakushi) — Biol. Inst.. Fac. of Sci.. Nagoya Univ., Chigusa-Ku, NAGOYA. Japan a. Ribonuclease activity in different presumptive regions of developing embryos. Triturus pyrrhogaster (Urodela) b. Physico-chemical state of ribonucleic acid in neural induction. Triturus pyrrhogaster (Urodela) TAKAYA. H. Ph.D., Prof. — Biol. Lab.. Dept of Lit. and Sci., Konan Univ., KOBE. 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 organizer. Triturus Hynobius (Urodela) TALEPOROS. P. D. B.S.. M.A. — Dept of Zool.. Fac. of pure Sci., Co- lumbia Univ.. Broadway and 116th St. NEW YORK 27, N.Y., U.S.A. a. Apyrase activity during regeneration. Tubularia (Coelenterata) h. RNA inhibition of phosphatases. Rana pipiens (Anura) TARDENT, P. — Abt. fiir Zoophysiol., Zool. Inst, der Univ., Sahlistr. 8. BERN, Schweiz a. Regeneration (Bedeutung der I-Zellen). (Hydrozoa) (in Zusammen- arbeit mit F. E. LEHMANN) TEMPELTON. M. A.B. — Dept of Anat.. Med. School. Univ. of Kansas. LAWRENCE. Kansas. U.S.A. a. Histochemical study of the influence of nerves upon the developing limb. Gallus domesticus (Aves) TENG KHOEN HING, J. T. — Anat.-Embryol. Inst.. Municipal Univ. of Amsterdam. Mauritskade 61. AMSTERDAM O. Holland a. Studies concerning the effect of X-rays on embryonic development. Continuation of earlier experiments. (Urodela) (in collaboration with H. A. L. TRAMPUSCH) TESTA. I. Dr — Heihgenberg-Inst., ( 1 7b) HEILIGENBERG. Kreis Ucbcr- lingen Bodensee. Deutschland (no data received on Nov. 1^'. 1953) TEYSSEYRE. Miss J. Dr en Med. — Lab. d'Embryol.. Fac. de Med., 15 Rue de I'Ecole de Med., PARIS Vie. France a. Repercussions du fonctionnement thyroidien maternel sur le develop- pement du systeme nerveux de I'embryon. THEILER, K. Dr Med. — Anat. Inst, der Univ.. Gloriastr. 19. ZURICH. Schweiz a. Untersuchungen iiber die Auswirkung verschiedener Letalfaktorcn auf die Entwicklung der Wirbelsaule. THOMAS, R. Lic.Sci.Chim. — Lab. de Morphol. anim., Fac. des Sci.. Univ. hbre de Bruxelles. 1850 Chaussee de Wavre. BRUXELLES-Auderghem. Belgique (no data received over some years) THOMASON. Miss D. B.A. (Hons.) — The Royal Free Hospital School of Med., 8 Hunter St. LONDON W.C.I. England (U.K.) a. Absorption and localisation of phosphate in embryos during development, using P 32. (Amphibia) Thomson 90 Tracy THOMSON FLYNN. T. F.I. I.E.. Dr. Prof. — Fac. of Sci., Queens Univ., BELFAST. Ulster. Eire (U.K.) (no data received) THURMOND. W. A.B.. M.A. — Dept of Zool.. Univ. of California, BERKELEY 4. Cal.. U.S.A. (no data received over some years) 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) b. Analysis of the regulative potencies of the invaginating archenteron roof and of the induced neural plate along the dorsoventral and cranio- caudal axes by heteroplastic transplantation of parts of the dorsal blastoporal lip. Triturus alpcstris. taeniatus and cristatus (Urodela) (in collaboration with P. D. NIEUWKOOP, Utrecht) c. Thyroid gland and adenohypophysis in delayed metamorphosis. Xenopus laeris (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 (Lagomorpha) f. Induction of mesoderm by killed inductors. Triturus (Urodela) TOLMAN, R. — Dept of Zool., Indiana Univ.. BLOOMINGTON. Ind.. U.S.A. a. Biochemical and immunochemical analysis of the synthesis and distribu- tion of the contractile proteins, actin and myosin, in the development of the heart in the early embryo. Gallus gallus (Aves) (in collaboration with J. D. EBERT) TONDURY. G. F.I.I. E. Prof. — Anat. Inst, der Univ., Gloriastr 19. ZORICH.Schweiz a. Ueber Viruswirkung auf die Embryonalentwicklung. b. Untersuchungen iiber Wachstum und Differenzierung fetaler Organe. c. Wachstum und Differenzierung embryonaler Organe in vitro unter verschiedenen experimentellen Bedingungen. d. Weitere Untersuchungen iiber die Wirkung weiblicher Sexualhormone auf spatere Entwicklungsstadien. Triton (Urodela) TORREY. T. W. Prof. — Dept of Zool.. Indiana Univ., BLOOMING- TON. Ind.. U.S.A. a. Histochemical and experimental analysis of the development of the uro- genital system. Mus rattus (Rodentia) b. Descriptive study of the early development of the nephros. Homo (Primates) TOSI. Miss L. Dott. Sci. Biol. — Zool. Station. NAPLES. Italy (no data received on Nov. 1", 1953) TRACY. H. C. Ph.D.. Prof. (Emer.) — Dept of Anat.. Med. School, Univ. of Kansas. LAWRENCE. Kansas. U.S.A. a. The development of all systems in relationship to behaviour. Opsanui tau (Pisces) (in collaboration with J. WINBLAD and Th. BATTY) b. Development of the nervous system in relation to behaviour. Op>;inus tau (Pisces) c. Physiological stages in development. Opsanus tau (Pisces) Tram 91 Tw TRAMPUSCH, H. A. L. Dr Phil. — Anat.-Embryol. Inst., Municipal Univ. of Amsterdam, Mauritskade 61, AMSTERDAM O, Holland a. Studies concerning the effect of X-rays on embryonic development. Continuation of earlier experiments. (Urodela) (in collaboration with }. T. TENG KHOEN HING) b. Experiments aimed to clarify the way in which determination of blastema takes place during regeneration. (Urodela) c. Experiments testing the role which different tissues play in accumulation of a regeneration-blastema. (Urodela) (in collaboration with A. J. VERGROESEN) d. Experiments directed to circumstances under which regeneration will be stimulated or inhibited. (Urodela) e. Histochemical analysis of regenerating limbs and tails. (Urodela) (in collaboration with P. COHEN) f. Cytological analysis of regenerating limbs with particular regard to pathological aspects of cell structures. (Urodela) (in collaboration with Miss P. J. VISSER) g. Influence of metamorphosis on the different stages of regeneration. (Urodela) (in collaboration with Miss E. A. KUIPER) TRIBE, Miss M. D.Sc. — King's Coll., Strand. LONDON W.C.2, England (U.K.) a. Fate of the dermatome. Gallus domesticus (Aves) h. 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. a. Mechanism of gastrulation, with particular attention to role of periblast. Fundulus heteroclitus (Teleostei) h. Experimental studies on histogenesis. Gallus domesticus (Aves) 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 G. M. B.Sc, Ph.D. — Dept of Genetics, Univ. Coll. London, Gower St, LONDON W.C.I, England (U.K.) a. Developmental genetics of skeletal mutants. Mus musculus (Rodentia) TSCHUMI. P. A. — Abt. fiir Zoophysiol.. Zool. Inst, der Univ., Sahhstr. 8. BERN, Schweiz a. Die Bedeutung der physiologischen Konkurrenz und weiterer intrablas- tematischer Korrelationen bei der Entwicklung chemisch behandelter Extremitaten. Xenopus (Anura) h. Modellversuche zur Genese von Extremitatenmissbildungen. Xenopus (Anura) c. Interpretation phylogenetischer Strahlenreduktionen. Xenopus (Anura) TUFT, P. H. M.A., Ph.D. (Cantab.) — Dept of Zool., Univ. of Edinburgh. West Mains Rd, EDINBURGH 9, Scotland (U.K.) (no data received on Nov. 1^'. 1953) TUNG, T. C. F.I. I.E., Dr, Prof. — Dept of Zool., Univ. of Shantung, TSINGTAO, China (no data received) TWITTY, V. C. F.I.I.E.. Dr. Prof. — Dept of Biol. Sci., Stanford Univ., STANFORD. Cal.. U.S.A. Twitty 92 Vand a. The differentiation of macrophaqes 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. The differentiation of gastrula-ectoderm in medium conditioned by axial mesoderm. (Amphibia) TYLER A. F.I.I.E.. Ph. D.. Prof. — Dept of Embryo!., Div. of Biol., Calif. Inst, of Technol.. PASADENA 4, Cal., U.S.A. a. Physiology of fertilization. (Echinoidea) b. Physiology of early development. (Echinoidea and Polychaeta) c. Life-span, motility and metabolism of spermatozoa. ( Echinodermata. Annelida. Mollitsca. Ai'cs and Mammalia) UBLSCH, L. V. F.LLE.. Dr jur. ct phil.. Prof. (Emcr.) — PARADIS, Norge. a. Untersuchungen iiber Pleuronectiden. IIL (Pleuronectidae. Tcleostei) b. Die Bcdeutung von Metamorphose, Generationswechsel und Poly- morphismus fiir die Abstammungslehre. UCHIDA. T. Rigakushi (M.S.), Rigakuhakushi (Dr), Prof. — Zool. Inst.. Fac. of Sci.. Hokkaido Univ.. North 8. West 5. SAPPORO, Japan (no data received on Nov. l"'. 1953) ULRICH, H. Dr Phil. — Zool. Inst, der Univ. Gottingen, Mathem.- Naturw. Fak., Bahnhofstr. 8, GOTTINGEN. Deutschland a. Strahlenwirkung in der Embryologie. Drosophila melanogaster (Dip- tera) URBANI. E. Lib. Doc. Anat. Comp., Biol, e Genet. — 1st. di Anat. Comp. deirUniv., Fac. di Sci., Via Borelli 50, ROMA. Italia a. Azione degli antimitotici sul metabolismo respiratorio. (Amphibia) b. Ricerche sui determinanti germinali. (Insecta) c. Ricerche sull'acido ribonucleico delle fasce vitellogene e dei nuclei vitellini. (Echinodermata. Arachnoidea, Myriopoda e Mammalia) d. Ricerche sugli enzimi nella vita latente. (Phyllopoda. Crustacea) e. Ricerche sugli enzimi negli eritrociti. (Vertebrata) URBANI^MISTRUZZl, Mrs L. Dott. — 1st. di Anat. Comp. deirUniv.. Fac. di Sci.. Via Borelli 50, ROMA. Italia a. Ricerche sulle parabiosi. (Anura and LIrodela) h. Ricerche sulle formazioni ergastoplasmatiche e sul ciclo secretorio. (Piilmonata. Gastropoda) VAHS. W. Dr — Zool. Inst, der Univ. Koln, Kerpenerstr. 13, KOLN- LINDENTHAL. Deutschland a. Die Beeinflussbarkeit der Leistungsspezifitat abnormer Induktoren in der Entwicklung. (Amphibia) b. Quantitative Nuclcinsaurcanalysen vom Gewebc abnormer Induktoren. Tritiinis (LIrodela) . Miis musculus (Rodentia) VAKAET. L. C. M.D. — Lab. of Anat., Fac. of Med., Univ. of Gent. Bylokekaai 1, GENT. Belgium a. Cytochemistry of ovocytes. Lebistes reticulatus (Teleostei) VANDEBROEK. G. Dr Sc, Prof. — Lab. d'Embryol., Inst, de Zool., Univ. dc Louvain. 71 Rue de Namur, LOUVAIN, Belgique (no data received over some years) Vann 93 Voy VANNINI, E. Dr, Prof. — 1st. di Zool. e Anat. comp., Via Universita 4. MODENA. Italia a. Cycle of the nucleic acid.s and nucleolar change.s during oogenesis. ( Echinodermata, Pisces and Amphibia) b. Development of the gonads and their embryological relations with the cortico-adrenal blastema. (Amphibia, Aves and Mammalia) c. Experimental analysis of the causal development of the gonads. (Am' phibia) 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 (no data received on Nov. 1"*'. 1953) VERGROESEN, A. J. — Anat.-Embryol. In.st.. Municipal Univ. of Am- sterdam, Maurit.skade 61, AMSTERDAM O, Holland a. Experiments te-sting the role which different tissues play in accumula- tion of a regeneration-blastema. (Urodela) (in collaboration with H. A. L. TRAMPUSCH) VIGLIANI. F. Dr — Inst, of human Anat., Corso Massimo d'Azeglio 52, TORINO. Italy a. Late development and growth of bones, joints and muscles in mecha- nically inert and denervated limbs. Canis familiaris (Carnivora) VILLAFRANCA, G. W. de Ph.D. — Dept of Zool.. Smith College, NORTHAMPTON. Mass.. U.S.A. a. Studies of various enzyme fractions in developing mu.scle in relation to the development of contractibility. Mus noruegicus albinus (Rodentia) b. Studies on the myosin proteins in the differentiation of muscle. Mus norvegicas albinus (Rodentia) VINTEMBERGER. P. Dr Med.. Prof. — Inst. d'Embryol.. Fac. de Med., 7 Place de I'Hopital. STRASBOURG. France a. Recherches sur le determinisme de la symetrie bilaterale chez les Ver- tebres. (Amphibia) VISSER. Miss P. J. — Anat.-Embryol. Inst.. Municipal Univ. of Amsterdam, Mauritskade 61, AMSTERDAM O. Holland a. Cytological analysis of regenerating limbs with particular regard to pathological aspects of cell structures. (Urodela) (in collaboration with H. A. L TRAMPUSCH) VIVIER. Mi.ss F. — Lab. d'Histol.. Dep. d'Embryol.. Fac. de Med., 31 Rue Lionnois, NANCY (Meurthe 6 Moselle), France a. Proprietes mecaniques du cortex de I'oeuf. (Amphibia) (en collabo- ration avec A. DOLLANDER) VOGEL, N. W. — Dept of Zool., Indiana Univ.. BLOOMINGTON. Ind., U.S.A. a. The development of pituitary-gonad interactions. Gallus gallus (Avcs) VOGT, Mi.ss M. M.D. — Hirnfor.schungs-Institut, NEUSTADT, Schwarz- wald, Germany (present address: Dept of Biol., Calif. Inst, of Technol., PASADENA 4, Gal.. U.S.A.) (no embryological work planned for 1953) VOY. A. Dr es Sci. — Lab. de Zool.. Fac. des Sci.. POITIERS. Vienne. a. Croissance, regeneration. (Orthoptera) France Wad 94 Weg 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) b Transplantation of cell constituents. Triton alpestris (Urodela) (in collaboration with E. M. PANTELOURIS) c. Mechanism of cleavage divisions, and micro-structure of coat and vi- telline membrane. Various species (Amphibia) (in collaboration with G. G. SELMAN and H. YATES) d. Metabolism of radio-isotopes. Triton (Urodela) (in collaboration with H. YATES) e. Phenocopies. Drosophila (Diptera) WAECHTER. Miss H. Dr rer.nat. — Heiligenberg-Inst.. (17b) HEILI- GENBERG, Kreis Ueberlingen/Bodensee. Deutschland (no data received on Nov. 1*', 1953) WAELSCH. Mrs S. GLUECKSOHN Ph.D. — Dept of Zool., Fac. of pure Sci.. Columbia Univ.. Broadway and 116th St, NEW YORK 27. N.Y.. U.S.A. a. Developmental genetics. Mus musculus L. (Rodentia) h. Developmental physiology. Mus musculus L. (Rodentia) WALLACE. D. R. J. B.Sc, Ph.D. — Dept of Zool.. Univ. of Edinburgh, West Mains Rd, EDINBURGH 9. Scotland (U.K.) a. Growth and differentiation of hypopi. (Acarina, Arachnoidea) WATTERSON. R. L. Ph.D. — Cresap Biol. Lab.. Northwestern Univ.. EVANSTON. 111.. U.S.A. a. Regulative development in lateral halves of neural tubes. Gallus do- mesticus (Aves) h. The role of the spinal cord in development of the axial skeleton, Gallus domesticus (Aves) c. The effects of colchicine upon development of the neural tube. Gallus domesticus (Aves) d. The effects of nitrogen mustard upon development of the neural tube and its intraneural vascular pattern. Gallus domesticus (Aves) WEBER, A. F.I. I.E.. Prof. (Emer.) — Lab. de Neurohistol., Inst. d'Anat.. Ecole dc Med., 20 Rue Ecole de Medccinc, GENfiVE, Suisse (no data received over some years) WEBER, R. DrPhil.nat. — Abt. fiir Zoophysiol.. 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. Sweden a. Embryology of the coeloms of the head. (Vertebrata) WEGLARSKA. Miss B. B.Sc. — Zool. Dept of the Jagellonian Univ.. St Annc6. KRAKOW. Poland (no data received on Nov. 1", 1953) Weiss 95 Wey WEISS, P. A. F.I.I.E., Ph.D.. M.D.(hon.c.). Prof. — Dept of Zool.. Univ. of Chicago. CHICAGO 37, 111., U.S.A. a. Growth and differentiation of dispersed and reaggregated cells. b. Electronmicroscopy of tissues in growth, regeneration and induction. c. Relation of mitogenesis to morphogenesis. d. Organspecific growth control. WEISZ. P. B. B.S., Ph.D. — Arnold Biol. Lab.. Brown Univ.. PROVI- DENCE 12, R.I.. U.S.A. a. Study of morphogenesis. Stentor and Blepharisma (Ciliata) b. Study of self-reproducing organelles. (Ciliata) c. Regeneration. Rana pipiens (Anura) and Mas norvegicus albinus (Ro^ dentia) WEL. W. H. v.d. Med. Drs — Anat.-Embryol. Lab. of the Univ. of Leyden. Fac. of Med.. Wassenaarseweg, Boerhaavekwartier. LEIDEN, Holland a. Development of vessel-system of the liver. Homo (Primates), Bos taurus, Ovis aries (Artiodactyla) WELLER. E. A.B.. M.S. — Dept of Zool.. Univ. of Cahf., LOS ANGE- LES 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 over some years) WENDT. G. G. Dr Med. — Anat. Inst, der Univ.. Robert Kochstr. 6. MARBURG/Lahn. Deutschland a. Embryonalentwicklung der Hautleisten und Tastballen. Beziehung zur Entwicklung der Blutgefasse und zu intrauterinen Druckschwankungen (Rodentia), (Mammalia), Homo sapiens (Primates) WENGER. B. S. B.S.. M.S., Ph.D. — Dept of Anat., Univ. of Kansas. Med. School, LAWRENCE, Kansas, U.S.A. a. Experimental and microchemical analysis of the developing nervous system and its relationship to peripheral structures. Gallus domesticus (Aves) WENGER, Mrs E. L. B.A.. M.A.. Ph.D. — Dept of Anat. Univ. of Kansas. Med. School, LAWRENCE. Kansas. U.S.A. a. Cytochemical and microchemical study of the developing nervous system and its relationship to developing behaviour patterns. Ambysto- ma maculatum (Uvodela) (in collaboration with P. G. ROOFE) WESTHUIZEN. C. M. v. d. M.Sc. — Zool. Inst.. Univ. of Stellenbosch. STELLENBOSCH. South Africa, a. Ontogenesis of the skull. Heleophryne purcelli (Anura) WEY— SCHUE. Mrs M. 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. Problemes relatifs a I'origine des cellules de regeneration. Triturus (Uvodela) 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) Whc 96 Willier WHEELER. A. J. Ph.D. — Physiol. Lab.. Coll. of Sci., Univ. of Portland, PORTLAND 3, Ore., U.S.A. a. Development and metamorphosis. Dendraster excentricus (Clypeastro- idca, Echinoidca) WHITELEY. A. H. Ph.D., Prof. — Friday Harbor Labs, FRIDAY HAR- BOR, Wash.. U.S.A. (no data received over some years) WHITING. H. P. M.A.. Ph.D. — Dept of Zool.. The University, BRIS- TOL 8. England (U.K.) a. Development of the nervous system and behaviour pattern. Scylliorhinus canicula. Pctromyzon fluviatilis, Salmo spp. (Pisces) (in collaboration with J. E.HARRIS) WICKLUND. Miss E. W. Ph. lie. — Wenner-Grens Inst, for experimental Biology, Norrtullsgatan 16, STOCKHOLM Va., Sweden (no data received on Nov. 1^', 1953) WILENS. Miss S. A.B. — Osborn Zool. Lab., Yale Univ., NEW HAVEN 11, Conn., U.S.A. a. The formation of the heart studied with the use of vital dyes. Ambijstoma punctatum (Urodela) h. The movements of the ectoderm and endoderm in contact with the heart mesoderm studied in early stages. Ambystoma punctatum (Urodela) WILLIAMS. R. G. A.B., M.A., M.D., Prof. — Dept of Anat.. School of Med., Univ. of Pennsylvania, PHILADELPHIA 4, Pa, 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. (Mam- malia) c. Studies on the effect of feeding and topical application of carcinogen on cells implanted in transparant chambers in rabbit's ears. (Mammalia) WILLIAMS. S. C. B.S., Ph.D., Assoc. Prof. — 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 Sts. 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) h. Factors regulating migration of melanoblasts and their growth (multi- plication) and differentiation (synthesis of specific melanin granules). Gallus domesticus (various varieties) (Aves) c. The role that sex and ohter hormones play in modifying the phenotypic expression of melanoblasts in color pattern formation. Gallus domesticus (various varieties) (Aves) Willier 97 Woel d. Ontogeny of endocrine correlation (a synthetic review). (Vertebrata) 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. Kansas, U.S.A. a. Development of all systems in relation to behaviour. Opsanus tau (Teleostei) (in collaboration with H. C. TRACY and th. BATTY) b. Pharmacodynamics of development. Opsanus tau (Teleostei) 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) , (Anthropoidea) (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. Dr Phil. — Embryol. Dept, Zool. Inst., Univ. of Lund, LUND, Sweden a. Embryology of the pituitary. (Vertebrata) WINOWSKA, Mrs }. M.Sc. — Zaklad Anat. Porownawczej, Inst. Zool. Uniw.. ul. Sienkiewicza 21, WROCLAW, Poland a. Development of the air-bladder. (Euphysoclisti, Teleostei) WISLOCKI, G. B. F.I. I.E., M.D., A.M.. Sc.D.. Prof. — Dept of Anat., Har- vard Medical School, 25 Shattuck St, BOSTON 15, Mass., U.S.A. a. Study on the histochemical reactions of the placenta and fetal membra- nes. Rattus norvegicus (Rodentia), Lepus cuniculus (Lagomorpha). Homo (Primates) b. Study on the structure of the placenta, investigated by electron micros- copy. (Rodentia), Homo (Primates) 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) b. Malformations. (Vertebrata) c. Sex inheritance and differentiation (normal and experimental). Rana. Bufo, Alytes and Xenopus (Anura) (Urodela) d. Parabiosis and hormones in sex differentiation. Triturus torosus e. Metamorphosis of the ear. (Anura) f. Embryologic and endocrine studies in adreno-gonadal relationships. (Amphibia. Aves and Mammalia) g. Nutritional conditions in the incubating egg. (Aves) WITTEK, Miss M. — Lab. d'Anat. et d'EmbryoL, Fac. de Med. de I'Univ., 97 Rue aux Laines, BRUXELLES, Belgique (no data received on Nov. 1=', 1953) WOELLWARTH, C. v. Dr Phil. — HeiHgenberg-Inst. (17b) HEILIGEN- BERG, Kreis Ueberlingen/Bodensee, Deutschland (no data received on Nov. 1=', 1953) Woci 98 Wood WOERDEMAN. M. W. F.I.I.E.. M.D.. D.Sc. (Oxon). Prof. — Anat- Embrvol. Inst.. Municipal Univ. of Amsterdam, Mauritskade 61. AM- STERDAM O. Holland a. Lensrcgcneration. (Aves and Mammalia) b. Induction in tissue cultures and potencies of cells in tissue culture. (Avcs and Mammalia) c. Development of specific substances during induction and regeneration. (Amphibia and Aves) WOLFF. Mrs Em. Dr 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. Role des hormones dans la differenciation du sexe par les methodcs 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 V i t r o de la syrinx et du tubercule genital de I'embryon. Anas boschas (Aves) c. Recherches sur les besoins nutritifs d'organes embryonnaires explantes et cultives sur millieu synthetique. WOLFF, Et. C. F.I.I.E..DresSci., 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 et la Teratologic. Mon- stres simples, monstres doubles et poly-embryonie. (Aves) b. La differenciation sexuelle, par les methodes de greffes, de castration, d'injections d'hormones et d'explantations. Differenciation normale et inversion sexuelle des gonades. des voies genitales et des caracteres somatiques precoces. Gallus et Anas (Aves) (en collaboration avec Mrs Em. WOLFF. Mrs Y. LUTZ— OSTERTAG. Mrs D. SCHEIB— PFLEGER. Miss B. SALZGEBER. A. HAMPfi et G. STRUDEL) c. Problcmes rclatifs a la regeneration des Planaires d'eau douce. Origine des cellules dc regeneration et processus d'induction dans la regeneration. Polycelis nigra. Euplanaria lugubris (Ttirbellaria) (en collaboration avec Mrs Fr. STEPHAN— DUBOIS et Th. LENDER) d. Recherches sur la differenciation in vitro des caracteres sexuels embryonnaires (gonades, canaux de Miiller etc.) et de differents organcs. Besoins nutritifs des organes en culture en milieux syntheti- ques. (Amniota) (en collaboration avec Miss K. HAFFEN, Mrs Em. WOLFF etc.) WOLSKY. A. DrPhil. (Budapest) — Unesco Science Co-operation Office for South East Asia, Dj. Diponegoro 76. DJAKARTA, Indonesia a. Comparative study of the rate of cleavage of marine ova in tropical regions, at normal and abnormal temperatures. Various species (Echi- noidea), various species (Polychaeta) b. The influence of the central nervous system (optic tract) on the development of the compound eye. Philosamia cynthia (Lepidoptera) WOODGER. J. H. Prof. — Middlesex Hospital, Med. School, LONDON W. 1. England (U.K.) (no embryological work in progress) Wr 99 Yn WRBA, H. Dr Med. — Inst, fiir exp. Krebsforschung der Univ. Heidelberg, Vossstrasse 3, HEIDELBERG, Deutschland a. Untersuchungen zur Frage der Differenzierung insbesondere des Zen- tralnervensystems und der Herzanlage in vivo und in vitro. (Ro^ dentia) YAMADA, T. D.Sc. (Rigakuhakushi), Prof. — Biol. Inst.. Fac. of Sci., Nagoya Univ., Chigusa-Ku. NAGOYA, Japan a. Double potential theory of early ontogenesis, its application to the regionality of the organizer action. (Vertebrata) b. Regional induction by some fractions of adult tissue tested on the isolated ectoderm. Tritutus pyrrhogaster (Urodela) YAMAMOTO. K. Rigakushi (M.S.), Asst Prof. — Akkeshi Marine Biol. Stat., Hokkaido Univ., AKKESHI, Japan (attached to the Sci. Fac. of Hokkaido Univ.) (no data received on Nov. 1^'. 1953) YAMAMOTO, T. Dr Sc, Prof. — Biol. Inst., Fac. of Sci., Nagoya Univ., Chigusa-Ku, NAGOYA, Japan a. On the mechanism of fertilization and activation. Oryzias latipes (Teleostei) b. Experimental analysis of the development of sexual characters. Oryzias latipes (Teleostei) leostei) .c. Experimental sex-reversal in the genetic males. Oryzias latipes (Te- d. Melanin formation in color phenotypes. Oryzias latipes (Teleostei) (in collaboration with T. HISHIDA) YANAGIMACHI, R. Rigakushi (M.S.) — Zool. Inst., Fac. of Sci., Hok- kaido Univ., North 8. West 5. SAPPORO, Japan (no data received on Nov. 1^', 1953) YAO, T. Ph.D. — Lab. of Developm. Physiol., Inst, for Exper. Biol., Acad. Sinica, 865 Chang Ning Rd, SHANGHAI, China (no data received over some years) YASHIKA, K. — Lab. of Embryol. and Exper. Morphol., Zool. Inst., Dept of Sci., Kyoto Univ., KYOTO, Japan a. Hormonal mechanism of metamorphosis. Bombyx mod, Luehdorfia japo- nica (Lepidoptera) and Lucillia (Diptera) YATES, Miss H. B. B.Sc. (St Andrews) — Inst, of Animal Genet., Univ. Dept of Genet., King's Buildings, West Mains Rd, EDINBURGH 9, Scotland (U.K.) a. Use of radioactive isotopes for tracing the movement of labelled sub- stances into and within embryos. (Amphibia) (in collaboration with C. H. WADDINGTON and J. DAINTY) YNTEMA, C. L. F.I.I.E., Ph.D., Prof. — Dept of Anat., School of NTed., State Univ. of New York. SYRACUSE 10, N.Y., U.S.A. a. Induction and differentiation of ear ectoderm. Ambystoma punctatum (Urodela) b. Regeneration of aneural limbs. Ambystoma punctatum (Urodela) c. Development of autonomic nervous system. Gallus domesticus (Aves) (in collaboration with W. S. HAMMOND) d. Effect of sulfa drugs on the embryo. Mus musculus (Rodentia) (in collaboration with W. S. HAMMOND) e. Development of the visceral skeleton. Gallus domesticus (Aves) (in collaboration with W. S. HAMMOND) Yo 100 Zwi YOUNG W. C. Ph.D.. Prof. — Dept of Anat., Univ. of Kansas, Med. School. LAWRENCE. Kansas, U.S.A. a. Reproduction as influenced by hypothyroidism and hyperthyroidism in both males and females. Cai>ia porcellus (Rodentia) b. Sexual behaviour in the male. Cavia porcellus (Rodentia) ZAAIJER, Miss J. J. P. Ph.D. — Lab. for Exper. Histol.. Fac. of Med., Univ. of Leydcn. Wassenaarseweg, Boerhaavekwartier, LEIDEN, Hol- a. Factors governing dentin formation. Mus musculus (Rodentia) land b. Role of the odontoblasts in the formation of secondary dentin. Mus musculus (Rodentia) c. Cartilage and bone formation in vitro. Homo sapiens (Primates) ZACWILICHOWSKA. Miss K. D.Sc. — Zool. Dept of the Jagellonian Univ.. St Anne 6. KRAKOW, Poland (no data received on Nov. 1"', 1953) ZAHND, J. P. — Inst. d'Embryol., Fac. de Med., 1 Place de I'Hopital, STRASBOURG. France a. Developpement du squelette. Facteurs influenqant le developpement. Anas (Aves) ZENKER. W. J. Dr Med. — Anat. Inst, der Univ. Wien, Wahringerstr. 13. WIEN IX, Oesterreich (no embryological work in progress) ZEUTHEN. E. Dr Phil. — Lab. of Zoophysiol.. Nat. Sci. Fac, Univ. of Copenhagen, Juliane Mariesvej 32, COPENHAGEN 0. Denmark a. Study with Cartesian divers of mitotic rhythm in metabolism during cleavage period. ( Echinodermata and Amphibia) 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 clea- vage. 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, BIR- MINGHAM 15. England (U.K.) (no data received on Nov l'^', 1953) ZUIDWEG. M. H. J. — Anat.-Embryol. Inst.. Municipal Univ. of Amster- dam. Mauritskade 61. AMSTERDAM O, Holland a. Quantitative development of different proteins in the embryonic eye-lens. Gallus domesticus (Aves) ZWEIBAUM. J. Dr. Prof. — Inst, of Histol. and Embryol.. Acad, of Med., ul. Chalubinskiego 5. WARSZAWA. Poland a. Le comportement de graisses dans le placenta. Homo (Primates), Mus musculus (Rodentia) (Insecta) h. Le glycogene. les graisses et les acides nucleiques dans les oeufs. ZWILLING, E. Ph.D.. Assoc Prof. — Dept of Genet.. Coll. of Agric. Univ. of Connecticut, Storrs Aqric. 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. Disaggregation and reaggregation of early embryos. Effects on diffe- rentiation. Gallus domesticus (Aves) d. Culture behavior of early embryonic tissues. Gallus domesticus (Aves) N. Africa 101 N. America (Canada) LIST OF INSTITUTES with Composition of Scientific Staffs (geographical order) N. AFRICA Alexandria, Moharram Bey, Alexan- dria Univ., Fac. of Sci.. Dept of Zool. RAMADAN, M. Head of Dept * SEDRA, S. N. Asst Prof. * MICHAEL. M. I. Demonstr. Rabat, Avenue Biarnay, Centre d'Etudes Superieures Scientifiques, Lab. de Biol. Anim. * METTETAL, C. Dir. * BUSER— LAHAYE, Mrs J. S. AFRICA Bloemfontcin, Univ. of the O.F.S., Dept of Zool. DUYVENE 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 MARCHAND, J. M. Prof. Dir. * DAVIES, D. H. Prof., Officer * JAGER, B. de Prof., Officer Johannesburg, Univ. of the Wit- watersrand, Med. School, Dept of Physiol. GILLMAN. J. Prof. (no data on Nov. P*, 1953) Dept of Anat. GILBERT, Miss Chr. Sen. Lect. (no data on Nov. \'\ 1953) Fac. of Sci., Dept of Zool. * BALINSKY, B. I. Lect. * KALK, Mrs M. Lect. * McKERROW, Miss M. J. Lect. * TROLLOPE, Miss E. M. * GUBBAY, Miss V. * ANDREW. Miss A. of Pietermaritzburg, Univ. of Natal, Dept of Zool. SILBERBAUER, Mrs B. I. PATERSON, Miss N. F. (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 over some years) Pretoria, Univ. of Pretoria, Fac Sci., Dept of Zool. 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. * WESTHUIZEN. C. M. v. d. * PENTZ. Miss K. * FRANK. G. H. * ENGELBRECHT, D. v. Z. * DIJK, D. E. van N. AMERICA CANADA ALBERTA (Alta) Edmonton, Univ. of Alberta. Med. School. Dept of Anat. * SHANER, R. F. Prof. Di * Names of investigators who have sent in their data over this year. Canada (B.C.) BRITISH COLUMBIA (B.C.) Vancouver, Univ. of Briti.sh Colum- bia. Dcpt 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. Prof. ONTARIO (Ont.) Guelph, Ontario Agricultural Coll.. Dcpt of Entomol. and Zool. * OZBURN, R. H. Hamilton, McMaster Univ.. Fac. of Arts and Sci.. Hamilton Coll., Dept of Biol. KLEEREKOPER, H. Chairman * SMITH. Miss B. T. Kingston, Queens Univ., Med. School * KROPP. B. N. Prof., Dir. London, Univ. of Western Ontario, Dept of Zool. UNITED STATES ALABAMA (Ala) Birmingham 5. 620 South 20th St. Med. Center of the Univ. of Ala- bama, Schools of Med. and Dent., Dept of Anat. FOLEY. J. O. Prof., Chairman * SENSENIG, E. C. Prof. * KLAPPER, CI. E. Assoc. Prof. * BOYER, C. C. Asst Prof. ' MOFFETT. B. C. Jr Asst Prof. CALIFORNIA (Cal.) Berkeley 4. Univ. of California, Dept of Zool. * EAKIN. R. M. Prof. * MAZIA. D. Prof. * HARRIS. M. Assoc. Prof. * BERG. W. E. Asst Prof. KUTSKY, Mrs P. B. Res. Assoc. * HARVEY. E. B. * BLUMENTHAL, G. H. 102 United States (Cal.) * BATTLE, Miss H. I. Prof. QUEBEC Montreal, McGill Univ., Dept of Zool. BERRILL, N. J. Prof. (no data over some years) Dept of Anat. * LEBLOND. C. P. Prof. 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., Agrege (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. ProL (no data on Nov. P^ 1953) SASKATCHEWAN Saskatoon, Univ. of Satkatchewan, Dept of Anat. JACKSON, J. L. Dir. * ALTSCHUL. R. Prof. * COHEN, A. I. * KUTSKY. R. J. THURMOND, W. Los Angeles 24, Univ. of Califor- nia, Dept of Zool. * SCHECHTMAN, A. M. Prof. * HEIM, W. G. * WELLER, E. * KNIGHT. Miss P. * SMITH, A. S. * HIRATA, A. A. Atomic Energy Project * SCHJEIDE, A. E. School of Med., Dept of Anat. ' GREULICH, R. C. Palo Alto, Stanford Univ., Dept of Biol. * DUSHANE. G. Prof. WHITAKER, D. Prof. U.S. (Cal.) Pasadena 4, California Inst, of Technology, Div. of Biol., Dept of Embryol. * TYLER, A. Prof., Head of Dept * JAFFE, L. Grad. stud, and Research Fellow VOGT. Miss M. (from Neustadt, Germany) * MERRITT, Mrs J. K. Research Asst * BROOKBANK. J. W. Grad. stud, and Teaching Asst Stanford, Stanford Univ., Dept of Biol. Sci. * TWITTY, V. C. Prof.. Dir. * NIU, M. C. * JACOBSEN. A. * CHURCH, G. * HEATH, H. D. COLORADO (CoL) Denver 20, 4200 East Ninth Ave, Univ. of Colorado, Med. Center, Div. of Chem. Embryol. * HERRMANN. H. Prof.. Dir. t* KONIGSBERG, L R. * LERMAN, L. MACKENZIE. J. * ROTHFELS. U. CONNECTICUT (Conn.) Middletown, Wesleyan Univ., Dept of Biol. GOODRICH, H. B. Prof., Dir. * CASPARI, E. W. Prof. New Haven 11, Yale Univ., School of Med.. Anat. Dept * STONE, L. S. Prof. * CRELIN, E. S. Osborn Zool. Lab. * NICHOLAS, J. S. Prof., Dir. * HARRISON, R. G. Prof. (Emer.) I* BOELL. E. J. Prof. * STONE, L. S. Prof. * POULSON. D. F. Assoc. Prof. * SHEN, S. C. Res. Asst * TRINKAUS. J. P. Instr. * WILENS. Miss S. Res. Asst * RUDNICK, Miss D. Storrs, Univ. of Connecticut. Dept of Zool. 103 U.S. (111.) * CLARK, H. Prof. Coll. of Agric, Dept of Genet., Storrs Agric. Exp. Stat. * LANDAUER. W. Prof., Dir. * ZWILLING, E. Assoc. Prof. FLORIDA Tallahassee, Florida State Univ., Dept of Zool. * METZ. C. B. GEORGIA (Ga) Atlanta, Emory Univ.. Dept of Biol. * CLEMENT. A. C. Prof. * HUNT. E. L. Prof. Augusta, Med. Coll. of Georgia, Dept of Microsc. Anat. * HEUSER, C. H. Prof. ILLINOIS (111.) Chicago 37. Univ. of Chicago. Physiol. Lab. LILLIE. R. S. (no data on Nov. VK 1953) Biol. Sciences Div., Dept of Zool. MOORE, C. R. Prof. (Embryo- logy, Sex Biology). Chairman * WEISS, P. A. Prof. (Embryolo- gy, Exp. Morphology), Dir., and Chairman, Divisional Bio- logy Sequence PRICE, Miss D. Assoc. Prof. (Embryology, Sex Biology) * OVERTON. Mrs J. Res. Assoc. * FERRIS. W. R. Res. Asst * LASH, J. W. Chicago 37. 5700 S. Ingleside. Univ. of Chicago. Whitman Lab. * MINTZ. Miss B. Asst Prof. Evanston, Northwestern Univ., Cresap Biol. Lab. * WATTERSON, R. L. Morton Grove, Baxter Inst, for Med. Research * WINDLE, W. F. Prof., Dir. * LITTRELL. J. L. Res. Assoc. Urbana, Univ. of Illinois, Dept of Zool. * ADAMSTONE, F. B. Prof.. Head of Dept * ROSE, S. M. Prof. U.S. (111.) 104 Klir.LIiR. O. E. Assoc. Prof. INDIANA (Ind.) Bloomington, Indiana Univ., Dcpt of Zool. * TORREV. T. W. Chairman * CROVVELL, P. S. * EBERT. j. D. Asst Prof. * ALBRIGHT. J. F. * DUFFEY, L. M. * MUN, A. M. * VOGEL. N. W. * TOLMAN. R. Franklin, Franklin Coll. * RHODES. S. A. Indianapolis 6, The Lilly Res. Labs, Biol. Res. Dept, Tissue Culture Res. JOHNSON, I. S. (no embryol. work in progress) IOWA Ames, Iowa State Coll., Div. of Sci.. Dept of Zool. and Entomol. HARRIS. H. M. Dir. * HAMILTON, H. L. Prof. Iowa City, State Univ. of Iowa, Dept of Zool. BODINE. J. H. Prof., Dir. * WITSCHI. E. Prof., Dir. of Embryol. Lab. * KOLLROS. J. J. Assoc. Prof. * BRUNER, Miss J. A. Res. * CHANG, C. Y. Res. Assoc. FU, Miss Yu-Ying Res. Asst * BERGEIJK. W. A. van Res. Asst WEST, W. L. KANSAS (Kan.) Lawrence, Univ. of Kansas, Med. School, Dept of Anat. * ROOFE. P. G. Prof.. Dir. * TRACY, H. C. Prof. (Emer.) * YOUNG. W. C. Prof. * LATIMER. H. B. ProL (Emer.) * BATTY. Th. V. Asst Instr. * WENGER, Mrs E. L. * WENGER. B. S. * TEMPELTON. M. Instr. Grad. students: * WINBLAD. J. N. U.S. (Md) * KELLER. L. * JANOSKY. I. * PENFOLD, R. * GATES. C. H. KENTUCKY (Ky) Louisville 2, 101 West Chestnut St, Univ. of Louisville, School of Med., Dept of Anat. * HALL, E. K. MAINE (Mc) 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. (no data on Nov. l'^*, 1953) MARYLAND (Md) Baltimore 1 , Univ. of Maryland, School of Med., Dept of Anat. * McCAFFERTY, R. E. Baltimore 5, Wolfe and Madison Sts, Carnegie Inst, of Washington, Dept of Embryol. * CORNER. G. W. Prof. Dir. * BURNS, R. K. Member * REYNOLDS, S. R. M. Acting Dir. 1952— '53, Member * RAMSEY. Miss E. M. Res. * BARTELMEZ, G. W. Consultant * CSAPO, A. I. Member * BOVING. B. G. Member * BISHOP, D. W. Member * FLEXNER, L. B. Res. Assoc. (extramural) * HERTIG, A. T. Res. Assoc. (extramural) * HEUSER, C. H. Res. Assoc. (extramural) GILLMAN, J. Res. Assoc. (extramural) Baltimore 18, The Johns Hopkins U.S. (Md) Univ., Fac. of Phil., Dept of Biol. * WILLIER, B. H. Prof., Dir. * BURNS, R. K. Hon. Prof. " RAWLES, Miss M. E. Res. * SIPPEL. T. O. Instr. * COULOMBRE. A. J. Bruce Fellow * GRABOWSKI, C. T. N.S.F. Fellow * DOSSEL. W. E. Jun. Instr. * REAMS, W. M.. Jr Jun. Instr. Beltsville, U.S. Dept of Agric, Bureau of Anim, Industry CASE. J. F. (no data over some years) Bethesda, Nat. Cancer Inst., Developmental Physiol. Unit * GROBSTEIN, C. Bethesda 14, Nat. Inst, of Health SHAPIRO, H. Prof. (no data over some years) Edgewood, Army Chemical Center, Med. Labs * BODENSTEIN, D. KRAUSS. M. Washington 7, D.C., Georgetown Univ., School of Med. KARCZMAR, A. G. (no data on Nov. 1^*, 1953) MASSACHUSETTS (Mass.) Boston 15, 25 Shattuck St, Harvard Univ., Med. School, Dept of Anat. * WISLOCKI. G. B. Prof.. Dir. * SNYDER. F. F. Assoc. Prof. * PADYKULA, Miss H. A. Dept of Pathol. * HERTIG, A. T. * ADAMS, Miss E. C. Dept of Gynecol. * ROCK, J. Boston 15, 221 Longwood Aye, Boston Lying-in Hospital * HERTIG. A. T. Brookline, 245 Pond Ave, Free Hospital for Women * HERTIG, A. T. * ROCK, J. * MULLIGAN, W. J. 105 U.S. (Minn.) Cambridge 38, Divinity Ave, Harvard Univ., Biol. Lab. HOADLEY, L. Prof. (Embryol.) ROSENBAUM, R. M. DAWSON, A. B. Prof. (Histol. & Cytol.) WILLIAMS, C. M. Prof. (Endocrinol.) WETMORE. R. H. (no data over some years) Cambridge 39, Massachusetts Inst, of Technol.. Dept of Biol. LAMY, F. (no data over some years) Northampton, Smith Coll., Dept of Zool. TE WINKEL. Miss L. E. Prof., Chairman CARPENTER, Miss E. Prof. * VILLAFRANCA. G. W. de Instr. Shrewsbury, 222 Maple Ave, Worcester Foundation for Exper. Biol. PINCUS, G. Prof.. Dir. CHANG, M. C. (no data on Nov. 1^«, 1953) 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. 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.) Minneapolis 14. Univ. of Minne- sota, Coll. of Sci., Lit. and Arts, Dept of Zool. MINNICH, D. E. Chairman * SPRATT, N. T., Jr Prof. U.S. (Minn.) STEINBERG. M. S. School of Med.. Inst, of Anat. BOYDEN. E. A. Head of Dept WELLS. L. J. Prof. HARTMANN, J. F. Asst Prof, (no data over some years) MISSOURI (Mo.) Columbia, LIniv. of Missouri. Dept of Zool. ELDER. W. H. Prof.. Chairman NOVITSKI. E. Assoc. Prof. * SHAVER. J. R. Asst Prof. St Louis 5. Lindell and Skinker Aves. Washington Univ.. Dept of Zool. * HAMBURGER. V. Prof., Head of Dept HALL, T. S. Prof. * MOOG. F. Assoc. Prof. * LEVI-MONTALCINI. R. Assoc. Prof. NEW JERSEY (N.J.) 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. 350 Henry St, State Univ. of New York. Coll. of Med.. Dept. of Anat. * GENNARO. J. F.. Jr Instr. Brooklyn 10. Bedford Ave and Ave H.. Brooklyn Coll.. Dept of Biol. * CHENEY, R. H. Prof. * MARTIN, Miss B. A. Instr. Brooklyn 12, Linden Boulevard and Rockaway Parkway, Beth-el Hospital ' GRUENWALD, P. Dir. of Labs Buffalo 14, 3435 Main St, School of Med., Dept of Anat. * HUMPHREY, R. R. Prof. Ithaca, Cornell Univ., Dept of Zool. 106 U.S. (N.Y.) ADELMANN. H. B. SINGER, M. Prof. (no data on Nov. l'», 1953) New York, 66th St, York Ave, Rockefeller Inst, for Med. Res. MIRSKY. A. Dir. (no data received) New York, New York Univ., Dept of Zool. * DALTON, H. C Assoc. Prof. New York 16. 477 First Ave, New York Univ., Coll. of Dentistry. Dept of Histol. * GOLDSMITH, E. D. New York 27, Broadway and 1 16th St, Columbia Univ., Fac. of pure Sci., Dept of Zool. * MOORE, J. A. Prof. * BARTH, L. G. Prof. * BARTH, Mrs L. J. Res. Assoc. * GRANT. Ph. * GREGG. J. R. Asst Prof. * MOORE. Mrs B. C. * MALAMED. S. * TALEPOROS. P. D. * WAELSCH, Mrs S. G. Res. Assoc. New York 32. 722 West 168th St. the N.Y. Psychiatric Inst.. Dept of Pharmacol. * RUDNICK. Miss D. New York 32. 630 West 168th St. 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) New York 33. 186th St and Amster- dam Ave. Yeshiva Univ., Dept of Biol. ATLAS. M. Assoc. Prof. (no data over some years) New York, Flushing 67. L.I.. Queens Coll.. Dept of Biol. * COLWIN. A. L. Prof. U.S. (N.Y.) 107 * COLWIN, Mrs L. H. Prof. Rochester 3, Univ. of Rochester, Coll. of Arts and Sci., Dept of Biol. COOPER, K. Dir. * HOLTFRETER, J. K. F. Prof. * MUCHMORE, W. B. * HAGGIS. A. J. Schenectady 8, Union Coll., Dept of Biol. CLARK, L. B. RAPPAPORT, R., Jr (no data on Nov. 1=*, 1953) 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.C.) Chapel Hill, Univ. of N. Carolina, Dept of Zool. * COSTELLO. D. P. Kenan Prof.. Chairman of Dept * LEHMAN. H. E. Assoc. Prof. * HENLEY. Miss C. Res. Assoc. * KENT. D. E. Collaborator 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. NORTH DAKOTA Grand Forks, Univ. of N. Dakota, School of Med.. Dept of Anat. * SNOOK. T. OHIO Columbus 10. Ohio State Univ., Dept of Anat. KNOUFF. R. A. Chairman U.S. (Pa) BAKER. R. C. Prof. EDWARDS. L. F. Prof, (no date over some years) OKLAHOMA (Okla) Oklahoma City, Univ. of Oklaho- ma, School of Med., Dept of Anat. LACHMAN, E. Chairman RICHTER. K. Assoc. Prof. CAIRNS. J. M. Asst Prof. (no data on Nov. 1^*, 1953) OREGON (Ore.) Corvalhs, Oregon State Coll., Dept of Zool. * HILLEMANN, H. H. 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. (no data over some years) Portland 3, Univ. of Portland, Coll. of Sci., Physiol. Lab. * MOORE, A. R. Prof., Dir. * WHEELER. A. J. Instr. PENNSYLVANIA (Pa) Bryn Mawr, Bryn Mawr Coll., Dept of Biol. GARDINER, Miss M. Dir. * OPPENHEIMER, Miss J. M. Prof. Philadelphia 4, Univ. of Pennsyl- vania, School of Med.. Dept of Anat. * FLEXNER, L. B. Prof., Chairman CLARK. E. R. Prof. (Emer.) * WILLIAMS. R. G. Prof. * HOGUE. Miss M. J. Assoc. Prof. (Emer.) * PIATT, J. Assoc. Prof. * LIU, J. C. Asst Prof. * WILLIAMS, S. C. Assoc. Prof. * HOLTZER, H. Assoc. Dept of Zool. HEILBRUNN. L. V. Prof.. Dir. FLICKINGER. R. A. Prof NELSEN. O. E. Prof. PARMENTER, C. L. Prof, (no data over some years) U.S. (Pa) 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 * KING.T. J. Res. Assoc. Dept of v^riemotherapy CREECH, H. J. Head of Dept * GREEN, Mrs E. U. Assoc. Member Pittsburgh 13, Univ. of Pittsburgh, School of Med.. Dept of Anat. * HOOKER, D. Prof.. Head of Dept * DONALDSON. J. C. Prof. * MUMPHREY. Miss T. Prof. * REVER. R. W. Asst Prof. Dept of Biol. Sci. GRAY, P. Prof., Head of Dept BUCHSBAUM. R. Prof, (no embryol. work in progress) Pittsburg 19, Duquesne University HECKERMAN. R. O. (no data over some years) RHODE ISLAND (R.I.) Kingston, Univ. of Rhode Island. Dept of Zool. * HARTUNG. E. W. Assoc. Prof., Head of Dept Providence 12, Brown Univ., Arnold Biol. Lab. * WILSON. J. W. Prof.. Head of Dept * CHASE. H. B. Prof. * EDDS. M. v.. Ir Assoc. Prof. * WEISZ. P. B. Assoc. Prof. * GOSS. R. M. Instr. 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. Asst Prof. * COHN, S. A. Asst Prof. * CORLISS. C. E. Instr. 108 U.S. (Va) TEXAS (Tex.) Austin 12. Univ. of Texas, Dept of Biol. OLIVER. C. P. Chairman (no embryol. work in progress) Galveston, Univ. of Texas. Med. Branch, Dept of Anat. DUNCAN, D. Dir. * SINCLAIR, J. G. Prof. * BLOUNT. R. F. Prof. * McNUTT. W. 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. I. H. Assoc. Prof. HETTIG, R. A. Assoc. Prof. (no data over some years) Dept of Pathol. NEWTON. B. L. Asst Prof. GALINSKY. I. (no embryol. work in progress) San Antonio, Robt B. Green Hosp. * MANHOFF. L. I. UTAH Salt Lake City 1 , 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 lORDAN. H. Prof. NOVIKOFF. A. B. Assoc. Prof. (no data over some years) VIRGINIA (Va) Charlottesville, The Univ. of Vir- ginia, Samuel Miller Biol. Labs * DENT. J. N. Assoc. Prof. School of Med.. Dept of Anat. * McKEEHAN. M. S. Morgantown, West Virginia Univ., School of Med. U.S. (Va) 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) Seattle 5, Univ. of Washington, Dept of Zool. MARTIN, A. W. Dir. FERNALD. R. L. (no data over some years) School of Med. * ROOSEN-RUNGE, E. C. Spokane 1 1 , Gonzaga Univ., Dept of Biol. FOUBERT, E. L., Jr Dir. 109 Asia (China) GUBBINS, J. F. Asst Prof. (no embryol. work in progress) WISCONSIN (Wis.) Madison, Univ. of Wisconsin, Dept of Anat. MORTENSEN, O. A. Chairman * BAST. T. H. Prof. * MOSSMAN, H. W. ProL * ORSINI, Mrs M. WARD— * CONAWAY. C. H. Milwaukee 3, 1217 West Wiscon- sin Ave, Marquette Univ., Dept of Biol. * REIS, R. H. Assoc. Prof., Head of Dept STEIL, W. N. Prof. * O'BRIEN, J. P. 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. (no data on Nov. V', 1953) Tucuman, Miguel Lillo 205. Univ. Nac. de Tucuman. Fac. de Ci. Biol., Inst, de Zool. CEI, J. M. Dir. PISANO. A. Prof. Embryol. (no data over some years) BRASIL Porto Alegre, Avenida Joao Pesoa, Fac. de Filos., Lab. de Genet. CORDEIRO. A. R. (no data over some years) CHILE Santiago, Av. Irarrazaval 849, Dept de Med. Exper. del Servicio Nacional de Salubridad LIPSCHUTZ. A. Prof., Dir. (no data on Nov. PS 1953) Santiago, Casilla 2988. Univ. Chile, Inst, de Biol. ..Juan Noe" BRIONES. H. (no data on Nov. 1^ 1953) URUGUAY Montevideo, Fac. de Med., Dept de Histol. y Embryol. BUNO. W. Prof.. Dir. (no data over some years) de ASIA CHINA Hangchow, Nat. Univ. of Chekiang. Dept of Biol. KIANG. H. M. Prof. CHOW. P. S. Lect. (no data over some years) Peiping, Ching Shan Tung Chieh, Nat. Univ. of Peking, Coll. of Sci.. Dept of Zool. LI. J. C. Prof. (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. China TUNG. T. C. Vice Dir. TCHOU SU. Dir. of the Lab. CHUANG HSIAO HUI, Res. Fellow YAO. T. Res. Fellow (no data over some years) Tsingtwo, Marine Biol. Lab. TUNG. T. C. (no data over some years) INDIA Allahabad, Allahabad Univ.. Zoo). Dcpt * SRIVASTAVA. M. D. L. Bchar, Patna, Prince of Wales Med. Coll., Dept of Anat. SINHA, T. P. Prof. (no data over some years) Calcutta 26, Cell Research Unit, Chittaranjan Cancer Hospital * MOOKERJEE. S. Head * DE. P. Res. Fellow * BOSE. A. Colombo 8, Ceylon, Kynsey Rd, Univ. of Ceylon, Fac. of Med., Dept of Anat. CHANMUGAM. P. K. Dir. (no embryol. work in progress) INDONESIA Djakarta, Dj. Diponegoro 76, Unesco Science Co-operation Office for South East Asia * WOLSKY, A. ISRAEL Jerusalem, The Hebrew Univ., Dept of Zool. HAAS. G. Prof.. Head REICH, K. * STEINITZ, H. * FELDMAN, M. * EYAL— GILADI. Mrs. H. * SHULOV. A. MOSCONA. A. MOSCONA, Mrs H. J.\PAN Fukuoka, Kuyushu Univ., Fac. of Sci., Biol. Inst. * KAWAKAMI, I. Prof. * KAWAKAMI, Mrs K. I. * MIFUNE. S. 110 Japan TAMANOI, I. Ikeda, Osaka Pref.. Osaka Liberal Arts Univ.. Lab. of Morphol. * NAKAMURA, O. Prof. * TAHARA. Y. Kobe, Konan Univ., Dept of Lit. and Sci., Biol. Lab. * TAKAYA, H. Prof. KAJI. S. Lect. Kyoto, Kyoto Univ., Dept of Sci., Zool. Inst., Lab. of Embryol. and Exp. Morphol. * ICHIKAWA, M. Prof., Dir. * IKUSHIMA. N. Asst * MASUDA, H. Guest * NISHIITSUTSUJI, J. Res. stud. * OKADA, T. Res: stud. * YASHIKA, K. Guest 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. * KAJISHIMA. T. Lect. * NAKANO. E. Lect. * TAKATA, K. Asst * OSAW^A, S. Asst * HISHIDA. T. Asst * OKAZAKI. R. Res. Assoc. Osaka, Kita-ku, Minami-Ogimati. Osaka City Univ.. Inst, of Poly- technics, Lab. Exp. Embryol. * ASAYAMA. S. Prof. * MIYAMORI— YAMAMOTO, Mrs. H. Asst * TAKAMOTO, K. Asst * AMANUMA. A. Asst Sapporo, North 8, West 5, Hokkai- do Univ., Fac. of Sci.. Zool. Inst. UCHIDA. T. Prof. MAKINO. S. Prof. ICHIKAWA. A. Prof. KANOH. Y. Asst Prof. AOTO, T. Asst YANAGIMACHI. R. Res. stud. YAMAMOTO. K. (Asst Prof., Akkeshi Marine Biol. Stat.) (no data on Nov. P', 1953) Japan Sendai, Tohoku (Imperial) Univ., Inst, of Biol., Lab. of Embryol. MOTOMURA, I. Prof.. Dir. (no data over some years) Sugashima-Mura, Shima-gun, Mie- ken, Nagoya Univ., the Sugashima Marine Biol. Stat. * SUGIYAMA, M. Dir. * ISHIKAWA, M. Asst * KUNO, M. Grad. stud. Tokyo, Setagaya-ku, Tokyo Metro- politan Univ., Fac. of Sci., Dept of Biol., Embryol. Section * DAN, K. Prof., Head of Sect. * DAN, Mrs J. C. Lect. * OKAZAKI, Miss K. Res. Asst * KAWAMURA. K. Res. Asst Tokyo, Tokyo Univ., Fac. of Sci, Zool. Inst. OKADA, Y. K. Prof. Tokyo, Univ. of Education, Inst, of Zool. * OKA, H. Prof., Head USUI, M. Asst Prof. SEKIGUCHI, K. Asst 111 Australia (N.Z.) WATANABE, H. Asst Tokyo, Musashino-shi, Seikei Univ., Biol. Inst. KAJISHIMA, T. (no data on Nov. 1^*, 1953) 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. LEBANON Beirut, American Univ., Dept of Biol. BUTROS, J. M. TURKEY Ankara, Veter. Coll. of the Univ., Inst, of Histol. and Embryol. * ERENgiN, Z. Istanbul'Beyazit, Univ. Histol.-Em- bryol. Enst. CLARA, M. Prof. AUSTRALIA AUSTRALIA Brisbane, George St, Univ. of Queensland, Dept of Zool. STEPHENSON, W. Prof. BLEAKLY, M. C. Lect. MATHER, W. B. Lect. (no embryol. work in progress) 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. Sen. Res. Officer (Guest-worker from C.S.I.R.O., Wool Biol. Lab., Sydney) Sydney, 17 Randle St, Common- wealth Sci. and Industr. Res. Org., Wool Biol. Lab. CARTER, H. B. Dir. * HARDY. Miss M. H. Res. Officer Sydney, Univ. of Sydney, Commonwealth Sci. and Industr. Res. Org., Anim. Genet. Sect. RENDEL, J. M. Head of Sect. FRASER, A. S. (no data on Nov. 1^', 1953) Sydney, Univ. of Sydney, Dept of Zool. * MURRAY, P. D. F. Prof., Dir. * SULLIVAN, G. E. 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 over some years) Europe (Austria) AUSTRIA Innsbruck, Tyrol, Histol.-Embryol. Inst, der Univ. • SAUSER. G. Prof.. Vorstand Wicn IX. Wahringerstr. 13. Anat. Inst, der Univ. Wien HAYECK. H. Prof.. Dir. KRAUSE. W. ' PRIESCHING. A. ZENKER. W. J. BELGIUM BruxcUes, 50 Av. F. D. Roosevelt. Univ. libre de Bruxelles. Fac. des Sci., Inst, de Zool. Torley-Rous- seau. Lab. de Zool. BRIEN, P. L. Prof.. Dir. HERLANT— MEEWIS. Mrs H. Chef de Trav. MARLIER. G. Asst (no data over some years) Bruxelles, 97 Rue au.x Laines, Fac. de Med. de I'Univ., Lab. d'Anat. et d'Embryol. DALQ. A. M. Prof., Head of Dept PASTEELS. J. Prof. TWIESSELMANN. F. Chef des travaux MULNARD. J. Asst (no data on Nov. P'. 1953) Lab. d'Histol. GfiRARD. P. Head of Dept • CORDIER. J. Prof. Bruxelles- Auderghem, 1850 Chaus- see de Wavre, Univ. libre de Bru- xelles. Lab. de Morphol. anim. • BRACHET. J. L. A. Prof.. Dir. • STEINERT. M. Asst • FICQ. A. A. Asst THOMAS. R. Asst Gent, Bylokekaai 1, Univ. of Gent. Fac. of Med., Lab. of Anat. • FAUTREZ. I. C. Prof.. Dir. • FAUTREZ— FIRLEFYN. Mrs N. J. • VAKAET. L. C. • GOVAERT, J. Gent, Universiteitstr. 14, 112 EUROPE Denmark Lab. voor Zool., Afd. Morphol. DE CONINCK, L. A. P. Prof. HUBLfi, J. Guest-workers: DENUCfi, J. M. DIERCKS, Fr. (no data on Nov. 1^', 1953) Liege, Quai Van Beneden 22, Inst. Zool. Ed. van Beneden, Dept de Morphol. des Chordes * DAMAS. H. F. C. Prof. Louvain, 38 Rue des Recollets, Univ. de Louvain, Inst. d'Anat. CAMPENHOUT. E. van Prof., Dir. MASY, Miss S. MEYER. R. de (no data on Nov. P', 1953) Louvain, 71 Rue de Namur, Univ. de Louvain, Inst, de Zool., Lab. d'Embryol. VANDEBROEK. G. Prof.. Dir. (no data over some years) DENMARK Copenhagen c Determination of primitive development d Development of part of the organism e Development of special organ systems (Cf. general subdivision p. 124 — 126) 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. 124 — 126) f Histo- and cytogenesis 8 Growth and di[[erentiation (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 vitamin.s 1 Theoretical problems Perri, T. — d Yamada, T. — a V 2 Methods and technics Beatty. R. A. — b Cotronei. G. — a Harvey. Mrs E. Browne — d Lucey. E. C. A. and Waddington. C. H. — b Williams. R. G. — a 3 General subjects (asexual development, etc.) Kuhn. O. — c (5) Oka. H. — b H Lutz, H. and Lutz-Ostertag, Mrs Y. -c I Lutz, H. — b L Sinclair. J. G. — b (5)M 4 Initial development a General subjects Harvey, Mrs E. Browne - -b G Leghissa. S. — a H Ortolani, Miss G. — b H Baltzer, F. and Lehmann. F. E. — d J II. 4a. 135 II. 6a. Briggs, R. W. and King, T. J. — a J Nieuwkoop, P. D. — c J Pantelouris, E. M. and Waddington, C. H. — b J Nicholas, J. S. — a,j M Nicholas, J. S. — h (4)M b Primordial germ cells Aubry, Miss R. — a J Mangold, O. and Stark, O. J. — a J c GametO', ovo- and spermato- genesis Dan, Mrs J. C — a C Lehmann, F. E. — c C Vannini, E. — d C Dreischer, Miss H. and Schnetter, M. — a Dan, Mrs J. C. — a Lehmann, F. E. — c Clavert, }. — a D E,G G,H (6)L Gothie. Miss M. M. C. S. — c M d Maturation Gothie, Miss M. M. C. S. and Moricard, R. — f M Moricard, R. — a, e M e Ovulation and oviposition Harvey, Mrs E. Browne — d G f Activation and fertilization Goszwald, K. — d D Cleland, K. W. — b (5)E, (5)G Moricard, R. — b M g Parthenogenesis Goszwald, K. — c D Harvey, Mrs E. Browne — a G Fankhauser, G. — a (4)J Shaver, J. R. — a J Beatty, R. A. and Selman, G. G. — a M Edwards, R. G. — a M 5 Cleavage and mitosis Harvey, Mrs E. Browne — b G a Cleavage Goodhart. C. B. — c EV Cleland. K. W. — b (5)E, (5)G Harvey, Mrs E. Browne — a (4)G (4)C D G (4)J Goodhart, C. B. — c V Colombo, G. — b (6) J Green. Mrs E. U. — a (5) J b Mitosis Mazia, D. — c Weiss. P. A. — c Costello. D. P.; Henley, Miss C. and Kent, D. E. — a Dan, K. — d Dan, K. — c Costello. D. P.; Henley, Miss C. and Kent. D. E. — a 6 Further development o[ Invertebrates a General subjects (complete development) Weisz. P. B. — a.b P Crowell, P. S. — a B Mifune, S. — a (5)C Nieuwkoop, P. D. — h (5)C Parnell. I. W. — a (4/5)C Bodenstein. D. — c {6)D Counce. Miss S. J. and Selman. G. G. — b (4)D Goldschmith. E. D. — a. b (5/6)D Goto, T. — a (5)D Hama. T. — b (5)D Legrand, J.-J. — b D Loecher, Miss E. and Schnetter. M. — a D Niiesch, H. — a D Dinger, Miss C; Dongen. W. J. van; Groot, B. de; Heyningen, Miss H. E. van; Janssen, C. R. and Raven. Chr. P. — a (5)E Dorp van VHet, N. O. van -a (5)E Erkel. G. A. van; Roon, A. C. de and Stadhouders. A. M. — a (4)E Kessler, H. F.~a (5)E Mes, Miss A. B. M. — a (5)E Mooy. Miss H. W. — a {5)E Nijenhuis, E. D. — a {5)E II. 6a. 136 II. 7a. Colwin, A. L. and CoKvin. Mrs L. H.- b F Dan. K. — a G Harvey, Mrs E. Browne — a (4)G Harvey, Mrs E. Browne — b G Reverberi, G. — b (5)H b Topogcncsis Kajishuna, T. — a D Lindahl, P. E. — a G Moore, A. R. — a G c Determination of primitive development Selman, G. G. — a (4)EV Holm. K. A. — a D Loecher. Miss E. and Schnetter. M. — a D Selman. G. G. — a (4)D Clement. A. C. — a E Horstadius. S. — a G Lallier. R. A. — d G Leghissa. S. — a H d Development of part of the organism Haget, A. — a D e Development of special organ systems £.vo-s^e/efon Kuhn. A. — b D Pigment cells and patterns Kuhn, A. — c D Nervous system Baffoni. G. M. — a D Dan. K. — d D Kawamura. K. — a D Eye Castiglioni. Miss M. C. — a D Wolsky. A. — b D 5^e/efon Okazaki, Miss K. — b G Muscular system Niiesch. H. — b D Sex determination Lallier, R. A. — c C Legrand. J. -J. — a D Urbani, E. — b D Endocrine glands Liischer. M. — b D f Histo- and cytogcncsis 7 Further development o[ Vertebrates a General investigations General subjects Nicholas, J. S. — e Remotti, E. — a Rugh, R. — a. b Holmdahl. D. E. — a Hama. T. — b Anton, H.-J. — b Battle, Miss H. I. — c Cambar. R. — d Gothie. Miss M. M. C. S. Goto. T. — a Guardabassi, Miss A. — c Holtfreter, J. K. F. — a Kawakami. I. — b Kawakami. Mrs K. I. — b Kemp, N. E. — b Leone. V. — a Lombard. G. L. — b Malamed. S. — a Markert. C. L. — b Mifune. S. — a Okada, T. — b Pollicita, Miss M. — a Reverberi, G. — a Schenk, R. — b Shaver, J. R. — d Srivastava. M. D. L. — b Takamoto, K. — b Urbani-Mistruzzi, Mrs L. Vintemberger, P. — a New. D. A. T. — a Ozburn. R. H. — a Wolff, Et. — a Zwilling, E. — a Zwilling. E. — c Beattv, R. A. — a Gothie, Miss M. M. C. S. Nicholas, J. S. — j Sinclair, J. G. — b Smithberg, M. — a Complete development Amprino, R. M. — c Partial development Pflugfelder. O. — c Pesonen, S. K. — a (4) V (5)LV I (5)J J -a, b J (5)J (6)1 (4)J (5)J (5)1 J (5)J I (5)J (5)1 (5)J J J (5)1 (5)J J (4)1 J L (5)L L (6)L L M i M M (5)M M (6)1 (5)J II. 7a. 137 II. 7c. Tondury, G. — d ( 6 ) J Implantation and placentation Bautzmann, H. — c V b Topogencsis Battle. Miss H. I. — a (5)1 Waddington, C. H. — a J Tribe, Miss M. — a L Waddington. C. H. — a L Early development Colombo. G. — b (6) J De Cesare, Miss I. and Pasquini. P. — a (5)J Goto, T. and Hama. T. — b (5) J Green. Mrs E. U. — a (5)J Pasquini, P. and Raunich. L. — c (4) J Rossini, Miss M. C. — a (5)J Gastrulation and formation o[ germ layers Trinkaus, J. P. — a I Nieuwkoop, P. D. -^ b J Roiewska. Miss J. W. — a (5)L Neurulation Rossini, Miss M. C. — b J Formation of neural crest Holmdahl. D. E. — c V Newth, D. R. — a I Saunders, J. W. — a L c Induction, determination, etc. Ikushima. N. — b Yamada. T. — a V Bautzmann. H. — a J Kawakami. I. — a J Nieuwkoop. P. D. — d J Takaya. H. — c J Twitty. V. C. — c J Nieuwkoop. P. D. — f L Induction Okada. T. — c Perri, T. — e Woerdeman. M. W. — c V Dokter. H. — a Eyal — Giladi. Mrs H. — a Feldman, M. — a Fremery, Miss R. de — a Goodhart, C. B. — b Haggis, A. J. — a Harrison, R. G. (New Haven) — b Hayashi, Y. — a Masuda, H. — c Mijsberg, Miss M. — a Nicholas, J. S. — c Nieuwkoop, P. D. — e Nigtevecht. G. van — a Oka. H. — a Perri, T. — a Reyer. R. W. — a. b Sande. Miss A. van der — a Schechtman, A. M. and Smith, A. S. — f Spof ford. W. R. — a Toivonen, S. I. — f Yamada, T. — b Yntema, C. L. — a Woerdeman, M. W. — b Dokter, H. — b Grabowski. C. T. — a McKeehan, M. S. — a Nieuwkoop, P. D. — g Grobstein. C. — b Hardy. Miss M. H. — a Toivonen, S. I. — e HV L L L L M M (5)M Determination Oppenheimer. Miss J. M. — a Horstadius, S. — b Lalher. R. A. — d Moore. }. A. — a Raunich, L. — c Reyer, R. W. — b Smith, S. — b Spof ford. W. R. — a Ahsan-ul-Islam — a L McKeehan. M. S. — b L Grobstein. C. — c M Nicholas. J. S. — d M Regulation and organization Balinsky. B. I. — a •Dollander, A. — b Egmond, Miss M. T. C. van — a Hama, T. — a Heath. H. D. — b Nieuwkoop, P. D. and Toivonen, S. — a Smith, S. — b Hampe, A. — a L Watterson, R. L. — a L II. 7d. 138 d Development of parts of he organism Butler. E. G. — d (4)1 Kollros. J. J. — f J Perri, T. — c J Wey-Schue. Mrs M. — b (4)L Head Horstadius. S. — b J Kollros, J. J. — f J Huber. W. — a L Limbs and wings Blokzijl. E. J. — a J Durante, Miss M. — b J Harrison, R. G. — a J Lchmann, F. E. — f j Oka. H. — a J Perri, T. — b J Piatt, J. — b J Ruud. Miss G. — a J Tschumi. P. A. — a (5)1 Bretscher. A. — b (5)L Brctscher. A. — c L Hampe, A. — a L Saunders, J. W. — c L Tail Bijtel, Miss J. H. — a J Farinella-Ferruzza, Mrs N. — a J Kollross, J. J. — f J Zwilling, E. — b L c Development of special organ systems Skin General subjects Niu, M. C. — c Lepori, N. G. — c Rawles. Miss M. E. — c Hardv. Miss M. H. — c Niu, M. C. — c Rawles, Miss M. E. — b, c Wendt. G. G. — a Teeth Goldsmith, E. D. — d Zaaijer, Miss J. J. P. — a Hair Hardy, Miss M. H. — a, c. Rawles, Miss M. E. — b Feathers Rawles, Miss M. E. — a Sense organs Oksche, A. A. — b J L L M M M (4)M (6)M M M M II. 7e. 2. Pigment cells and patterns Mori, Y. — a I Dalton, H. C. — a, b J Dushane, G. — b J Lepori, N. G. — c, d L Rawles. Miss M. E. — a L Saunders, J. W. — a L Sengel, Ph. J. — b L Wilher, B. H. — b L Rawles, Miss M. E. — b M Nervous system General subjects Stefanelh. A. — b I Baffoni, G. M. — a Gallera, J. — b Sala, M. — a Spofford. W. R. — b Stefanelh, A. — b Hamburger, V. and Levi-Montalcini, R. — a L Hammond, W. S. — b L Sengel. Ph. J. — b L Stefanelh, A. — b L Wenger, B. S. — a L Wrba, H. — a M Central nervous system Eakin, R. M. — a J Egmond, Miss M. T. C. van — a J Nieuwkoop, P. D. — d J Godina, G. — c L Grabowski, C. T. — a L Nieuwkoop, P. D. — f L Watterson, R. L. — c, d (5)L Brain Oppenheimer, Miss J. M. — a I Crelin, E. S. and Stone, L. S. — b J Kollross, J. J. — b, f J McMurray, Miss V. M. — a (4)1 Harkmark, W. — a L Hillcmann. H. H. — g L Williams, S. C. — a L Liu, I. C. — b M Spinal cord Holmdahl, D. E. — b V Kollros, I. J. — f J Littrell. J. L.; Windle, W. F. and Stuart. E. G. — b L Gates. C. H.— a M Ganglia Kollros. J. J. II. 7e. 2. 139 II. 7e. 10. Spinal ganglia Dushane, G. — a J Strudel, G. — a L Gates, C. H. — a M Nerves Piatt, J. — b J Edds, M. v., Jr — b M Para- and sympathetic and intramural nervous system Hammond, W. S. and Yntema, C. L. — a L Strudel, G. — a L Special sense organs Kawakami, I. — a Eye Reyer. R. W. — b J Reinbold, R. — b L Eye (s.s.) Guardabassi, Miss A. — a, b J Jacobson, A. — a J Saxen, L. O. — b (5) J Amprino. R. M. — a, b L Coulombre, A. J. — b L Lens McKeehan, M. S. — a, b L Ear Guardabassi. Miss A. — d (6)J Harrison, R. G. (New Haven) — b J Yntema, C. L. — a J Lateral sense organs Kille, R. A. — a, b I Skeleton General subjects Hale, L. J. — a L Kieny, Miss M. A. — a L Murray, P. D. F. — b L Zahnd, J. P. — a L Goldsmith, E. D. — d (6)M Griineberg, H. — a M Toivonen, S. I. — e (5)M Williams, R. G. — b M Zaaijer, Miss }. J. P. — c M SkuU Kille, R. A. — a I Hammond, W. S. and Yntema, C. L. — d L Truncal skeleton Holtzer, K. — a J Watterson, R. L. — b L Muscular system General subjects Herrmann, H. and Rothfels, U. — b L Konigsberg, I. R. and Herrmann, H. — c (6)L Skeletal muscles (head, tnmk and tail) Rawles, Miss M. E. — d L Muscles of limbs and wings Blokzijl. E. J. — a J Alimentary tract General subjects Maltese, Miss C. — a J Okada, T. — a J Palazzo, Miss F. — a J Mouth and pharyngeal cavities Hamilton, H. L. — a L Intestinal tract Takaya, H. — a J Liver Filogamo, G. — a L Respiratory organs External gills Durante, Miss M. — a J Heart, vascular system and blood General subjects Holmdahl, D. E. — d V Stephan, F. — a L Heart Wilens, Miss S. — a J Stephan, F. — a L Wrba, H. — a M Arterial and venous system Stephan, F. — a L Watterson, R. L. — d (5)L Coelomic cavities and endothelia. lymphatic system and connective tissue Lympathic system Gyllensten, L. J. W. — a (6)M Urogenital system and sex determination General subjects Gaillard. P. J. — a M Kidney Bijtel, Miss J. H. — b J Cambar, R. — a J Haf fen. Miss K. — a L Urinary ducts Burns, R. K. — b (6)M II. 7c. 10. HO II. 8a/b. Gonads Salzgeber, Miss B. — c (5 Querner. H. — b Amanuma, A. — a (4) Attardo, Miss C. — a Vannini, E. — b, c Witschi. E. — f Haffen. Miss K. and Wolff. Et. — b L Limborgh, J. van — a L Vannini, E. — b L Witschi. E. — f L Burns. R. K. — b (6)M Vannini. E. — b M Witschi. E. — f M Genital tracts and accessory glcinds Q'jcrner, H. — b I Lutz^ — Ostertag. Mrs Y. — a L Burns. R.K. — b (6)M Sex determination Yamamoto. T. — b, c I Attardo. Miss C. — a Chang, C. — a (6) Chang, C. — b Takaya. H. — b Witschi, E. — c Witschi. E. — d (6) Wolff, Et.; Haffen, Miss K. and Wolff, Mrs Em. — d HV Limborgh, J. van — b L Mintz. Miss B. — a {6)L Salzgeber, Miss B. — a (4/5)L Salzgeber, Miss B. and Wolff. Et. — b (4)L Scheit>— Pfleger, Mrs D. — a (6)L Wolff, Mrs Em. — b L Wolff, Mrs Em. and Wolff. Et. — a (6)L Wolff, Et.; Wolff, Mrs Em.; Lutz — Ostertag, Mrs Y.; Scheib — Pfleger, Mrs D.; Salzgeber, Miss B.; Hampe, A. and Strudel, G. — b L Burns, R. K. — a (6)M Jest, A. D. — a (6)M Jost, A. D. — c M Endocrine glands Hypophysis Blount. R. P. — b J Dalton. H. C — b J Eakin. R. M. — a I Thymus Hammond, W. S. — c L Thyroid gland Dossel. W. E. — a L Gaillard, P. J. — b L Adrenals Witschi, E. — f J, L. M £ HistO' and cytogenesis Stefanelli, A. — a I Feldman, M. — a J Gallera, J. — b J Lehman, H. E. — b (4/5)J Stefanelh, A. — a J Levi, G. L. — a, b HV Abercrombie, M. — a L Abercrombie, M. and Heaysman, Miss J. E. M. — b L Filogamo, G. — a L Rudewicz, Mrs Cz. — a (5)L Stefanelli, A. — a L Trinkaus, J. P. — b L Wilher. B. H. — b L Cj.obstein, C. — a, c M 8 Growth and di[[erentiation (Invertebrates and Vertebrates) a Growth Altschul, R. — a Weiss, P. A. — d Legrand, J. -J. — c D Clark, H. and Shannon, J. E. — e V Church, G. — a Hamburger, V. — b Kollros, J. J. — b Levi-Montalcini, Miss R. — b Oksche, A. A. — a Baginski, S. — a (5)L Mickiewicz, Miss Z. — b (5)L Rozewska, Miss J. W. — b (5)L Rudewicz, Mrs Cz. — b (5)L Edds, M. v., Jr — b M Williams, R. G. — a M a/b Growth and differentiation Tondury, G. — c Weiss, P. A. — a Kawamura, K. — a D Levi, G. L. — a HV Godina, G. — c L Zwilhng, E. — d L II. 8a/b. HI II. 8d. Grobstein, C. — a M b Differentiation Loccher, Miss E. and Schnetter, M. — a D Poulson. D. F. — b D Stefanelli, A. — a I Briggs, R. W. and King, T. J. — a J Lehman, H. E. — b (4/5)J Markert, C. L. — c J Rose, S. M. — a J Stefanelli, A. — a J Haffen, Miss K. and Wolff, Et. — b L Hale, L. J. — a L Herrmann, H. and Rothfels. U. — b L Stefanelli, A. — a L Williams. S. C — a L Zwilling, E. — c L III. PHYSIOLOGY OF DEVELOPMENT SUBDIVISION 1 Theoretical problems 2 Methods and technics 3 General subjects (asexual development, etc.) 4 Initial development a General subjects b Primordial germ cells c Gameto-, ovo- and spermatogenesis d Maturation e Ovulation and oviposition f Activation and fertilization g Parthenogenesis 5 Cleavage and mitosis a Cleavage b Mitosis 6 Further development o[ Invertebrates a General subjects (complete development) b Primitive development (including early development) c Induction and determination d Development of part of the organism e Development of special organ systems (Cf. general subdivision p. 124 — 126) f Histo- and cytochemistry g Serological and immunological studies 7 Further development o[ Vertebrates a General investigations 1 General subjects 2 Complete development 3 Later development 4 Implantation and placentation 5 Development of behaviour b Primitive development 1 Early development 2 Gastrulation 2/3 Gastrulation and neurulation Neurulation Development of neural crest III. 1 M2 III. 4a. 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. 124 — 126) f Histo- and cytochemistry g Serological and immunological studies 8 Growth and differentiation (Invertebrates and Vertebrates) a Growth a,t) Growth and differentiation b Differentiation 9 Nutrition of 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 Perri, T. d Goldsmith, E. D. — e Reynolds, S. R. M. — b M M Woerdeman, M. W. — b HV Young. W. C. — a, b M 2 Methods and technics 4 Initial development Csapo. A. I. — e a General subjects Lerman. L. — b Kajishima, T. — b {2)D Marchlewski, J. H. — a Zweibaum, J. — b (2)D 3 General subjects Urbani — Mistruzzi, Mrs L. — -b E Harvey, Mrs E. Browne — b G (asexual development , etc.) Kiessling, K.-H. — a (1)G Kuhn, O. — a (6) Lindahl, P. E. — b, c (2)G Lanzavecchia. G. — a (2) Smith, S. — a I Centamori, M. — a (2)Plants Vakaet, L. C. — a (2)1 Centamori, M. — c (4) Plants Barth, L. G. — a (2)J Holter. H. — b P Barth, Mrs L. J. — a (1)J Mookerjee. S. — b P DoUander. A. and Crisp. D. J. — a D Vivier, Miss F. — a (3)1 Goldsmith, E. D. — c D Dollander, A. and Urbani, E. — d (2)D Melnotte. P. J. — c (3)J Cohen. A. I. — b (UJ Minganti, A. — c J Nicoletti, B. — a J Orlandi, Miss A. — b J Taleporos, P. D. — b J Witschi, E. — a (1)J Hillemann. H. H. — f L Baiocchi, C; Cheney, R. H. — b (5)M Moricard, R. and Corner, G. W. — b M Gothie, Miss M. M. C. S. - -a M III. 4a. 143 III. 6a. Nicholas. J. S. — a M Waelsch, Mrs. S. Gluecksohn — b M b Primordial germ cells c GametO', ovo- and spermatoge- nesis Erengin, Z. — a (6) Jaffe. L. F. — a Plants Tyler. A. — c EV + V Vannini, E. — a (2) EV + V Urbani. E. — c (2)D Battaglia, B. — a (2)E Ranzoli. F. — a (2)E Mazia, D. — b (2)G Urbani, E. — c (2)G Baffoni. G. M. — b (6) J Dollander, A. and Losseroy, J. — g (5) J Hayashi, Y. and Osawa. S. — b (2) J Hillemann. H. H. — f L Bishop, D. W. — a (1)M Bishop, D. W. — b M Clegg, E. J. — a M Harrison, R. G. (Liverpool) — a (1)M Macmillan, E. W. — a M Nilsson, Miss A. E. A. — a M Urbani, E. — c (2)M Young, W. C. — a (6)M d Maturation Kihlstrom, J.-E. — a. b M Lindahl, P. E. — d M e Ovulation and oviposition f Activation and fertilization Cleland, K. W. — a, c (1/3)E Colwin, A. L. and Colwin, Mrs L. H. — a F Cleland. K. W. — a (1)G Endo, Y. — a (2)G Ishikawa, M. and Sugiyama, M. — a G Merritt, Mrs J. K. and Tyler, A. — a G Metz, C. B. — b (2)G Monroy, A. — a, b G Nakano, E. — b (1)G Nakano, E. — c G Tyler, A. — r a G Minganti, A. — b H Yamamoto, T. — a I Okazaki, R. — b (2)J Shaver, J. R. — b J Austin, C. R. and Braden, A. W. H. — a, b (2/3)M Kihlstrom. J.-E. — b M Lindahl. P. E. — e M Young, W. C. — a (6)M g Parthenogenesis Ishikawa, M. and Sugiyama. M. — a G Rostand, J. — a (4)J Shaver, J. R. — a J 5 Cleavage and mitosis Harvey, Mrs E. Browne — b G Zeuthen. E. — c (4)G Waelsch. Mrs S. Gluecksohn — bM a Cleavage Wolsky. A. — a (4)C Berg, W. E. — a (1)E Cleland, K. W. — a. c (1/3)E Urbani — Mistruzzi, Mrs L. -b (1)E Cleland, K. W. — a (1)G Kuno, M. — a G Wolsky, A. — a (4)G Zeuthen, E. — a (1)G Green, Mrs E. U. — a (2/5)J Shaver, J. R. — c J Zeuthen, E. — a (1)J Austin, C. R. and Braden, A. W. H. — a (2)M b Mitosis Mazia. D. — c (2) O'Connor. R. J. — a (2)V 6 Further development of Invertebrates a General subjects (complete development) Knight-Jones. E. W. — b EV Bonner. J. T. — a P Monne, L. — a C Seidel, F. — b C Bodenstein, D. — b (1/6)D El Shatoury, H. — f (6)D Fautrez-Firlefyn, Mrs N. J. — a (2)D III. 6a. Goszwald. K. — b D Henke, K. mit Mitarbcitern — b D Kloft, W. — a D Lii.schcr. M. — a D Pflugfclder. O. — a (1/6)D Seidel. F. — b D Shulov. A. — a (4)D Ulrich. H. — a (3)D Dinger, Miss C; Dongen. W. J. van; Groot. B. de; Hcyningen, Miss H. E. van; Janssen, C. R. and Raven. Chr. P. — a (5)E Dorp van Vliet, N. O. van -a (5)E Erkel, G. A. van; Roon, A. C. de and Stadhouders, A. M.— a (4)E Geilenkirchen, W. L. M. — a (1)E Kessler. H. F. — a (5)E Mooy. Miss H. W. — a (5)E Nijenhuis. E. D. — a (5)E Raven. Chr. P. — b (5)E Blumenthal, Miss G. H. — a G Brookbank. J. W. — a (2)G Cheney. R. H. — a (5)G Cigada. Miss M. — a (2)G Harvey. Mrs E. Browne — b G Holter. H. — a (2)G Kavanau. J. L. — a (1|5)G Mazia, D. — a (2)G Colwin, A. L. — c (5)H b Primitive development (including early development) Jaffe. L. F. — b Plants Tyler. A. — b C Kajishima. T. — b (2)D Cheney. R. H. — d (1/5)G Lindahl. P. E. — b. c G Tyler. A. — b G Ortolani. Miss G. — a H c Induction and determination Barth. L. G. — b B Citterio. P. — a (1)G Horstadius. S. — a G Lallier. R. A. — d G McKeehan. M. S. — c (2)G Ranzi, S. — a G 144 HI- 7a. Barth. L. G.— b H d Development of part of the organism c Development of special organ systems Eye Butz. P. and Ludtke. H. — a D Haas. G. and Ludtke. H. — a D Ludtke. H. — a D McKeehan. M. S. — c (2)G Blood El Shatoury. H. — c D Sex determination Aubry. Miss R. — b ' E f HistO' and cytochemistry Osawa. S. — b (2)EV Mancuso. V. — b (2)E Swedmark. B. G. — a G Mancuso. V. — a (2)H g Serological studies El Shatoury, H. — d D 7 Further development of Vertebrates a General investigations General subjects Rugh, R. — a (4) Schechtman, A. M. — a (3) Sinclair. J. G. — e Castigli Pitotti. Mrs M.— c (1)V Goodhart. C. B. — a V Baxter, E. W. — c I Querner. H. — a (6)1 Sundell. L. E. — a I Tracy. H. C — c I Winblad, J. — b I Becht. G. — a (4)J Bondi, C. — a (2)J Brachet, J. L. A. — c (5)J Bruner. Miss J. A. — b (1)J Cenacchi. Miss M. — a (1)J Cigada. Miss M. — a (2) Grant. Ph. — b (2) Gregg. J. R. — a ^^\l Guardabassi, Miss A. — c (6)J III. 7a. 145 Hoff-Jorgensen, E. and Zeuthen, E. — a (2)J Holtfreter. J. K. F. — a (4)J Kemp, N. E. — b (1)J Lallier. R. A. — a. c (5)J L0vtrup, S. — b J Mifune, S. — b (1|2)J Moore, Mrs B. C. — a (2)J Nace. G. W. — a (1)J Sundell, L. E. — a Takata, K. — a (2) Thomason, Miss D. — a (2)J Urbani, E. — a (1/5)J Urbani — Mistruzzi, Mrs L. - -a J Waddington, C. H. and Yates, H. — d (1)J Yates, Miss H. B.; Waddington, C. H. and Dainty, J. — a (1)J Bose, A. and Mookerjee, S. — a (2/4)L Centamori, M. — b (2)L Cigada, Miss M. — a (2)L Evans, H. J. — a (5)L Hamilton, H. L. — c (1)L Henke, K. mit Mitarbeitern — b L Hunt, E. L. — a, b (1)L Moog, Miss F. — a (1)L O'Connor, R. J. — b (1)L Rudnick, Miss D. — a (2)L Saunders, J. W. — e (4)L Caspari, E. W. — c M Cheney, R. H. — b (5)M Levy, Mrs G. — a (6)M Moog, Miss F. — a (1)M Seidel, F. — a M Sinclair, }. G. — f M Smithberg, M. — b M Snyder, F. F. — a. b (1|5)M Sundell. L. E. — a M Waelsch, Mrs S. Gluecksohn — b M Young, W. C. — a (6)M Later development Fitzgerald, L. R. — a, b (1/4)M Hillemann, H. H. — c M Implantation and placentation Bautzmann, H. — c V Boving, B. G. — a M Clark, H. and Honio, Miss B. — d K III. 7c. Csapo, A. I. — b,c, d (2/3/6)M Csapo, A. I. — f M Flexner, L. B. — b M Harrison, R. J. — f (2)M Hillemann, H. H. — a M Schenk, R. — a (2)M Wislocki, G. B. — a (2)M Zweibaum, J. — a (2)M Development o[ behaviour Batty, Th.; Tracy, H. C. and Winblad, J. — a I Harris, J. E. and Whiting, H. P. — a I Tracy, H. C — b, c I Crelin, E. S. and Stone, L. S. — b J Faber, J. — b J Saxen, L. O. — a J Hooker, D. — a, b M b Primitievc development (including early development) Hishida, T. and Nakano, E. — a (1)1 Okazaki, R. and Osawa, S. — a (2/5) J Bellairs — Morgan, Mrs M. R. — b L Ford, P. — a (2)L Gould, R. P. — a L Skreb, N. — a (2)M Early development Nakano, E. — a (1)1 Brachet, J. L. A. and Pasteels, J. J. — b (2)J Cohen, A. I. — a (1)} Green, Mrs E. U. — a (2/5)J Ikushima, N. — a (3)J Masuda, H. — a (2)J Rostand, J. — d (4)J Gastmlation and neurulation Newth, D. R. — b (3)J Selman, G. G. — b J c Induction and determination, etc. Nieuwkoop, P. D. — d J Induction Deuchar, Miss E. M. — b (2) J Englander, H. — a J Ficq, Mrs A. A. — b J Johnen, Miss A. G. — a } III. 7c. 146 III. 7e. 3. Kuusi. Miss T. K. — a. c (2)J Kuusi, Miss T. K. — b I Lallicr. R. A. — b (5)J Nicholas. J. S. — c J Okazaki, R. — c (5)1 Okazaki. R. and Osawa. S. — a (2)J Rollhauser— tcr Horst, Mrs J. O. B. — a (5)J Takata. K. — b (2)J Vahs. W. — a J Vahs. W. — b (2)1 Nieuwkoop, P. D. — g L Vahs. W. - b (2)M Determination Citterio. P. — a (1)J Lallier, R. A. — d J Ranzi. S. — a J Regulation and organization Hama, T. — a (2)J d Development of parts of the organism Limbs and wings Tempelton, M. — a (2)L e Development of special organ systems Skin General subjects Toivonen. S. I. — a J Hair Hardy. Miss M. H. — b M Isings. J. — a. b (2/6)M Feathers Kuhn. O. — b L Rawlcs. Miss M. E. — a L Wilher. B. H. — a (2)L Glands Cohn. S. A. — b Pigment cells and patterns Hishida, T. and Yamamoto, T. — b Lehman, H. E. — a Niu. M. C. and Twitty. V. C — a. b Dossel. W. E. — b Ebert. J. D. — b Hamilton. H. L. — b Markert, C. L. — a Rawles, Miss M. E. — a (2)M (1)J J L (2)L L (1)L L Saunders, J. W. — b. d Wilher. B. H. — a, b Willier, B. H. — c Dossel. W. E. — b Hardy, Miss M. H. — b Markert, C. L. — a Nenyoits system General subjects Tracy, H. C — b Faber, J. — b Roofe, P. G. and Wenger. Mrs E. L. — a Hamburger, V. and Levi-Montalcini, R. — a Wenger, B. S. — a Preto Parvis, Mrs V. — a Central nervous system Janosky, I.; Wenger,- E. and Roofe. P. — a Keller, L.; Wenger, E. and Roofe, P. — a Edgar. G. W. F. — a Teysseyre, Miss J. — a Brain Shen, S. C. — a Flexner, L. B. — a Giroud, A. — a Spinal cord Holtzer. K. — b Zuidweg, M. H. J. — a Accessory organs Paraphysis Langevoort, H. L. — a Nerves Spinal nerves Tempelton, M. — a Special sense organs Eye Crelin, E. S. and Stone, L. S. — a Stone. L. S. — b Hermann. G. and Ludtke, H. — a Eye (s.s.) Rhodes. S. A. — a Saxen, L. O. — a Coulombre, A. J. — a Coulombre, A. J. — b Lens Bon, W. F.; Gate, G. ten and Zuidweg, M.H. J. — a (2) J L (2)L (6)L M M (DM I J (2)J L (2)L (2)M (2)J (2)J (2)M (6)M J M M J (2)L (2)L J J M (2)J J (2)J L (2)L III. 7e. 3. 147 III. 7e. 10» Ear Bergeijk, W. A. van — a Skeleton General subjects Batty. Th. — c Hale, L. J. — a Hogewoning, C. H. — a, b Kieny, Miss M. A. — a McCallion, D. J. — a Truncal skeleton Rose, A. — b Muscular system General subjects Kalk, Mrs M. J. — a Herrmann, H.; Konigsberg, I. R. and Lerman, L. — a Konigsberg, I. R. and Capillary system Bartelmez, G. W. — a M I L {6)L L (2)L (2)L (2)J (2)L Herrmann, H. — b Nicholas, J. S. — b Rollhauser, H. — a Villafranca, G. W. de — a Villafranca, G. W. de — b (2)L (2)M M M {2)M Visceral muscles (head and trunk) Csapo, A. I. — a M Alimentary tract General subjects Batty, Th. — b I Liver Armstrong, P. B. — a Flexner, L. B. — a Hillemann, H. H. — d Padykula, Miss H. A. — a M M (1)M (2)M Respiratory organs Lungs and larynx Clark. H. — b K Heart, vascular system and blood General subjects Batty, Th. — c Reynolds, S. R. M. — a I M Heart Grodzinski, Z. — a Duffey, L. M. — a Ebert, J. D. and Tolman, R. — a Hall, E. K. — a (4)1 L (2)L M Arterial and venous system Froud. M. D. — b Bartelmez. G. W. — a L M Blood Urbani, E. — e (2)V Nicoletti, B. — b J Knight, Miss P. and Schechtman, A. . M. — a L Schjeide, A. E. - - a L Coelomic cavities and endothelia. lymphatic system and connective tissue Lympathic system Menschik, Z. — b (2)M Urogenital system and sex determination General subjects Torrey, T. W. — a (2)M Kidney and urinary ducts Clark. H. — a K Clark. H. and Fischer, D. — c L Johnson, F. R. — a M Gonads Asayama. S. — b (2) J Takamoto, K. — a (2) J Haffen. Miss K. — c L Limborgh, J. van — a L Genital tracts Mintz, Miss B. — b (2)L Scheib— Pfleger, Mrs D. — a (2)L Bartelmez, G. W. — a M Corner, G. W. — b M Csapo, A. I. — a M Reynolds, S. R. M. — b M Sex determination Asayama, S. — a (6) J Bellanca, Miss A. — a (6)J Bruner, Miss J. A. — a (6) J Humphrey, R. R. — c J Miyamori (Yamamoto), H. — a (6)J Limborgh, J. van — b L Lutz — Ostertag, Mrs Y. and Wolff, Et. — b (6)L Reinbold. R. — a (6)L Wolff, Et.; Wolff, Mrs Em.; Lutz — Ostertag, Mrs Y.; Scheib — Pfleger, Mrs D.; Salzgeber, Miss B.; Hampe, A. and Strudel, G. — b L III. 7c. 148 HI. 8a. Endocrine i]landfi General subiccts Wilher. B. H. — d V Konicjsberg, I. R. — a (1)L Blount, R. F. — c M Hypophysis Blount. R. F.— a I Albright. J. F. — a (2)L Amprino, R. M. — c L Vogel. N. W. — a L Jest. A. D. — b M Thyroid gland Dossel. W. E. — a L Jost. A. D. — b M Gonads Witschi. E. — i J Vogel. N. W. — a L Witschi. E. — f L. M Adrenals Witschi. E. — f J Leroy. P. J. M. — a L Witschi. E. — f L Jost. A. D. — b M Witschi. E. — f M I Histo- and cytochemistry Fautrez. J. C. — a Sauser, G. — b Arosio. G. — a Osawa. S. — b Woerdeman, M. W. — c Dent. J. N. — a Deuchar, Miss E. M. — a Ficq. Mrs A. A. — a Kuusi. Miss T. K. — b Mookerjee, S. — a Nicholas. J. S. — f, g Nicoletti. B. — b Raunich, L. — g Steinert. M. — a, b Hogewoning. C. H. — a, b Mookerjee, S. — a Preto Parvis. Mrs V. — b Spratt. N. T.. Jr — b Cohn, S. A. — b De, P. and Mookerjee, S. — a Friberg, U. and Ringcrtz, N. — a Graumann, W. — a Hillemann. H. H. — d Hintzsche. E. — a Johnson. F. R. — b V (2)V V (5) (6)L L L L M M M M M M M Menschik, Z. — b M Nicholas. J. S. — f, g M Preto Parvis, Mrs V. — b M Preto Parvis, Mrs V. and Roncoroni, G. — c M Torrey, T. W. — a M g Serological and immunological studies Arosio, G. — b J Clayton — Freedman, Mrs R. M. — a J Kalk. Mrs M. J. — a J Manelli. E. — a J Nace. G. W. — a, b J Albright, J. F. — a L Ebert, J. D. and Tolman, R. — a L Ebert, J. D. — b L Heim, W. G. — a L Knight, Miss P. and Schechtman, A. M. — a L Langman, J. — e L Man. A. M. — a L Schechtman. A. M. and Weller. E. — b L Trollope, Miss E. M. — a L Arosio. G. — b M Billingham, R. E. — a M Brambell, F. W. R. — a M Clayton — Freedman. Mrs R. M. — b, d M Halhday, R. — a M Hemmings, W^. A. — a M Medawar, P. B. — a M 8 Growth and di[[erentiation (Invertebrates and Vertebrates) a G^wth Altschul, R. — a Cheney. R. H. — c Plants Bodenstein, D. — a (6)D El Shatoury, H. — f (6)D Pantelouris, E. M. — a D Cheney, R. H. — a {5)G Oksche, A. A. — a (6)J Harris, M. — a. b L Kutsky, R. J. — a (5)L Spratt. N. T.. Jr — a L Kuusi. Miss T. K. — d (2)M McCallion, D. J. — b (6)M III. 8a/b. 149 a/b Growth and differentiation Dainty, J. — a (3/4) Boell. E. J. — a (2) J Levi, G. L. — b HV Hintzsche, E. — b {5)M IV. 2a. b Differentiation Bonner, J. T. — a P Sippel, T. O. — a {1|4)D O'Connor, R. J. — a V Clayton — Freedman, Mrs R. M. — a J L0vtrup, S. — a (2)J Hale, L. J. — a L Hamilton, H. L. — b L Herrmann, H.; Konigsberg, I. R. and Lerman, L. — a (2)L Clayton — Freedman, Mrs R. M. — d (2)M 9 Nutrition o[ embryo (Invertebrates and Vertebrates) Wolff, Mrs Em. — c Leibbrandt, Miss M. and Schnetter, M. — a D Kavanau, J. L. — a (5)G Sundell, L. E. — a (2)1, (2)} Wolff. Et.; Haffen. Miss K. and Wolff, Mrs Em. — d Byczkowska, Miss W. — a Herrmann, H. and Rothfels, U. — c Spratt, N. T., Jr — a Witschi. E. — g Wolff, Mrs Em. — b Menschik, Z. — a Sundell, L. E. — a HV L (6)L L L L M (2)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 ( 1 ) Metabolism and respiration (2) Cytochemistry (4) Physical treatment (6) Influence of hormones and vitamins 1 Theoretical problems and general questions a Theoretical problems b General questions Poulson, D. F. — b Orlandi, Miss A. — a Beatty, R. A. — b Caspari, E. W. — c 2 General genetical studies a General studies Benazzi — Lentati, Mrs G. — a C Lepori, N. G. — a, b C Papi, F. — a C (2)V Henke, K. mit M Mitarbeitern — c D M Sigot, A. — a D IV. 2a. 150 IV. 3b. Sippel. T. O. — a Ulrich. T. — a Waddington. C. H. — e Battaglia. B. — a Baffoni. G. M. — b Baltzer. F. and Lehmann. H. E. — d Chang. C. — d Colombo. G. — a Humphrey, R. R. — e. f, g Witschi. E. — c (4)D {3)D D (2)E (6)1 Markcrt. C. L. — a (DM Latimer, H. B. — c M Markert, C. L. — a (1)M McNutt. C. W. — b M Waelsch. Mrs S. Gluecksohn — aM b Hctcroploidy Benazzi, M. — a c Hagqvist, G. — a V Fankhauser, G. — a (4)1 Fankhauser. G. — b Fankhauser, G. — c. d (6)J Fankhauser, G. and Humphrey, R. R. — e, f Humphrey, R. R. — c, d Moore, Mrs B. C. — a Moore. J. A. — a Beatty, R. A. — a M Edwards, R. G. — a M c Hybridization Dodd. J. M. — a E Minganti, A. — a H Baxter. E. W. — b I Baltzer, F. — a Benazzi, M. — b Brachet. J. L. A. — a (1) Gregg. J. R. — a (1) Humphrey, R. R. — c, d Moore, J. A. — a d Chimaera Baltzer, F.; Eymann, H. and Henzen, W. — b J Baltzer, F. — c J Carrano, Miss F. — a J Church, G. — a J e Merogony Harvey, Mrs E. Browne — a G 3 Analysis of influence of special genes and mutants a Special genes and mutants Castiglioni, Miss M. C. — b D Castiglioni Miss M. C. — c (2)D Counce, Miss S. J. — a, c D Kuhn, A. — b, c . D Nef, W. and Rosin, S. — a D Sobels, F. H. — a D Chang, C. — c J Dalton, H. C. — a J Rostand, J. — b J Kieny, Miss M. A. — b L Landauer, W. — a L Carter, T. C. — a, b M Caspari, E. W. — b M Clayton — Freedman, MrsR. M. — b M Griineberg, H. — a M Lyon, Miss M. F. — a, b M McNutt, C. W. — a M Truslove, Miss G. M. — a M b Lethal factors Ede. D. A. — a D El Shatoury, H. — a D Theiler, K. — a V Humphrey, R. R. — f, g J Landauer, W. — c L 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 V. 1 151 V. 3a. Development o[ special malformations and pathological development of special organs a Development of special malformations b Pathological development of special organs (Cf. general subdivision p. 124 — 126) Tumours 1 Theoretical problems and general questions 2 General investigations in pathological development a General subjects Sensenig, E. C. — e Tondury, G. — a Trampusch, H. A. L. and Visser, Miss P. J. - -f Dodd, J. M. — b E Baltzer, F. — a J Fankhauser, G. and Humphrey, R. R. • — e J O'Brien, J. P. — a J Perri, T. — a J Bartelmez, G. W. - -d M Gruenwald, P. — b M Langman, J. and Nieuwenhuis, R. — -b M Smithberg, M. — a M b Relation between host and graft Pantelouris, E. M. — a D Ebert, J. D.; Albright, J. F. and Mun, A. M. — c L c Pathological influence of chemi- cal treatment and deficiencies Kuhn, O. — c Mori, H. — a D Creutzberg, F. — a E Dollander, A. and Marconnet, R. — f J Green, Mrs E. U. — a J Raunich, L. — f J Evans, H. J. — a L Gruenwald, P. — a L Herrmann, H. and Rothfels, U. — c L Landauer, W. — b, d L Langman, J. — c L Mickiewicz, Miss Z. — a L Giroud, A. — b, c M Gyllensten, L. J. W. — b M Lefebvres — Boisselot, Mrs J. — a M Morion, Miss C. — a M Sinclair, J. G. — b M Wilhams, R. G. — c M d Pathological influence of physical treatment Rugh, R. — c Beenakkers, A. M. T. — a E Gennaro, J. F., Jr — a J O'Brien, J. P. — a, c J Teng Khoen Hing, J. T. and Trampusch, H. A. L. — a J Herrmann, H. and Rothfels, U. — c Manhoff, L. }. — a Wey — Schue, Mrs M. — b Gennaro, J. F., }r — a c Teratology Wolff, Et. — a Bruner, Miss J. A. — c Faassen, F. van and Langman, J. — a Giroud, A. — d Griineberg, H. — a Levy, Mrs G. — b 3 Development of special mal- formations and pathological development of special or- gans a Development of special malfor- mations Witschi, E. — b V Tschumi, P. A. — b J Bretscher, A. — a L Pflugfelder, O. — b L Haines, R. W. — a M Harrison, R. J. and Harrison Matthews, L. — e M Humphrey, Miss T. — c M L L L M L M M M M M V. 3a. 152 V. 4. Lclievre. A. — a Orts Llorca, F. — b Shancr, R. F. — b. c b Pathological development special organs Central nervous system Holmdahl. D. E. — e Dclmas. A. — b Sensenig, E. C. — b. d Sinclair, J. G. — d Cephalic ganglia Sensenig, E. C. — d Meninges Sensenig, E. C. — b Sense organs Delmas, A. — b Eye Castiglioni, Miss M. C. — b Chase. H. B. — a Giroud. A. — e Gyllensten. L. J. W. — b Lefebvres — Boisselot, Mrs J. Skeleton Jest. A. D. — d Sensenig, E. C. — b, c Lungs and larynx Gyllensten, L. J. W. — b Heart and vascular system Stephan, F. — b Dankmeijer, J. and Snellen, H. A. — d Gyllensten, L. }. W. — b M M M o( V M M M M M M D M M M b M M M M Heart Dankmeijer, J. and Los, J. A. — a V Shaner, R. F. — a M Sinclair, J. G. — d M Arterial and venous system Reis, R. H. — a,b M Gonads and genital tracts Harrison. R. J. — b M Harrison, R. J. and Harrison Matthews, L. — e M Hypophysis Blount, R. F. — b J 4 Tumours Remotti, E. — b Barigozzi, C. — b D El Shatoury, H. — b, e D Hartung. E. W. — a D Holmdahl. D. E. — f V Barigozzi. C. — a } Lehmann, F. E. — e J O'Brien, J. P. — b J Raunich, L. — f J Rose, S. M. — a J Spirito. A. — a J Weber, R. — b J Hirata, A. A. and Schechtman, A. M. — a L De, P. and Mookerjee, S. — a M Hamburger, V. — b M Hirata, A. A. and Schechtman, A. M. — a M Koecke. U. — a M Levi-Montalcini, Miss R. — b M VI. REGENERATION SUBDIVISION / 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 regenerations d Regeneration of special organ systems (Cf. general subdivision p. 124 — 126) VI. 1. 153 VI. 3d. 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 Lash, J. W. — a Brondsted, H. V. -a.b A,C Goss, R. J. — a J Masuda, H. — b J Goss, R. J. — a K Koecke, U. — b L 2 General investigations, including total regeneration Weiss, P. A. — b Barth, L. G. — b B Lehmann, F. E. and Tardent, P. — d B Lehn, H. — a B Spratt, N. T., Jr — c B Taleporos, P. D. — a B Abeloos, M. — a C Bondi, C. — b (5)C Chandebois, Miss R. — a C Cresp, J. — a C Hubl, H. — b (6)C Hub], H. — c C Kawakami, Mrs K. I. — a C Michon, J. — a C O'Brien, B. R. A. — a C Spratt, N. T.. Jr — c C Kiihn, A. — a D Needham, A. E. — a D Voy. A. — a D Barth, L. G. — b H Woerdeman, M, W. — c V Anton, H.-J. — a J Butler, E. G. — a J Grant, Ph. — a J Kuiper, Miss E. A. and Trampusch, H. A. L. — a J Weber, R. — a J Weisz, P. B. — c J Wey — Schue, Mrs M. — a J M (4)C a, b C Abercrombie, M. and Santler, Miss J. E. — c 3 Partial regeneration a General subjects Hubl, H. — a Stephan — Dubois, Mrs F. — Wolff, Et.; Stephan — Dubois, Mrs F. and Lender, Th. — c Lecamp, M. — a Rose, S. M. — a Trampusch, H. A. L. — b, d Trampusch, H. A. L, and Vergroesen, A. }. — c Weber. R. — c b Tail regeneration Horn, E. C. — b Cohen, P. — a Holtzer, K. — c Lehmann, F. E. mit Mitarbeitern — b Raunich, L. — b c Limb regeneration Buser — Lahaye, Mrs J. — a Butler. E. G. — a, b Butler, E. G. — d Cohen, P. — a Fremery, Miss R. de — b Heath, H. D. — a Ichikawa, M. — b Mettetal, C. — a Trampusch, H. A. L. and Visser, Miss P. J. — f Yntema, C. L. — b d Regeneration of special organ systems Nervous system Baffoni. G. M. — a D Stefanelh. A. — b I Baffoni, G. M. — a J Stefanelh, A. — b Central nervous system Liu, J. C. — a (5) (4) LL VI. 3d. 154 VII. 2b. Gontcharoff. Miss M. — a (4)C Eye-lens Kollros. J. J. — d J Sato. T. — b I Piatt. J. — a J Pasquini, P. — a (5)J Littrcll. J. L.: Windle. W. F. Reyer. R. W. and and Stuart, E. G. — - a L, M Stone, L. S. — a J Amerces Leghissa, S. — e Lcghissa. S. and Pasquini, P. — d V Sato, T. — a Srivastava, M. D. L. — a 1 (5)J Steinitz, H. and Stone, L. S. — c (5)J Edds. M. v.. Jr — a M Woerdeman, M. W. — a HV Eye Alimentary tract Gontcharoff, Miss M. — b C Sengel, Ph. J. — a C Lender, Th. — a C Wilson, J. W. — a V Steinitz, H. and McMinn. R. M. H. — a M Stone, L. S. — a, b J Gonads Steinitz, H. and Vannini, E. — d C Stone, L. S. — c (6)J Thyroid gland Stone, L. S. — a, c J Reilly, T. D. — a M Amprino, R. M. — b L 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. 124 — 126) CHARACTER OF INVESTIGATION (5) Chemical treatment 1 Theoretical problems and general questions Ubisch, L. v. — b 2 General investigations a General subjects Hylbom, J. R. — a C Knight-Jones, E. W. — a C Henkc. K. mit Mitarbeitern — a D Knight-Jones, E. W. — a D Liischer, M. — a D Piepho, H. — a D Sandison, Miss E. E. — a D Silen. L. K. P. — a F Harvey, Mrs E. Browne — Wheeler, A. J. — a Oka, H. — c Baxter, E. W. — a Horn, E. C. — a Castigli Pitotti, Mrs M. — Humphrey, R. R. — e Kuiper, Miss E. A. and Trampusch, H. A. L. — Leghissa, S. and Pasquini, P. — d b Hormones and metamorphosis Bodenstein, D. — a, b D Geigy-Heese, R. — b D Highman, K. C. — a D Ichikawa, M. — a D J J (5)J VII. 2b. 155 VII. 2d. Liischer, M. — b Yashika, K. — a Kollros, J. J. — c Toivonen, S. I. — c c Metamorphosis of part of the organism Okazaki, Miss K. — a G d Metamorphosis of special organ systems Skin Kollros, J. J. — c (6) J Brain Kollros, J. J. — e J Witschi, E. — e J Skull Michael, M. I. and Sedra, S. N. — a I Intestinal tract Harder, W. — a Kollros. J. J. — c Gonads Bier. K. — b I (6)J D Endocrine glands Leghissa. S. — f ^6)J 156 ..SUPPLY AND DEMAND" SERVICE for Laboratory Animals Transactions should be carried out directly between the interested parties. We do not take any responsibilities either for the transactions themselves, or in matters relating to prices, in- and export regulations, animal protection regulations etc. A. LIST OF NAMES AND ADDRESSES with species available and wanted (geographical order) AVAILABLE WANTED S. AFRICA 1.* EDUCA PRODUCTS (Pty.) Ltd. — P.O. Box 3538. CAPE TOWN, South Africa Marine fauna and flora; Myriopo- da. Scorpiones, Insecta, Mollusca (giant land snails); Reptilia and Amphibia 2. ZOOLOGICAL INSTITUTE. Univ. of Stellenbosch — STELLEN- BOSCH. South Africa Peripatus; various South African Embryos of Holocephali (pre- Anura served) N. AMERICA United States 3. DEPT OF EMBRYOLOGY. Div. of Biol.. Calif. Inst, of Technol. — PASADENA 4, Cal., U.S.A. Urechis caupo (Gephyrea, Anne- lida) (ripe animals. October to June, on special arrangements) 4.' TROPICAL HOBBYLAND — 1525 N.W. 27th Ave, MIAMI 35, Florida. U.S.A. All kinds of animals from all coun- tries on 60 days notice 5.* GENERAL BIOLOGICAL SUPPLY HOUSE — 761-763 E, 69th Place. CHICAGO 37. 111., U.S.A. 6 DEPT OF EMBRYOLOGY. Carnegie Inst, of Washington — Wolfe and Madison Sts, BALTIMORE 5, Md, U.S.A. Macaca mulata (throughout the year, not on exchange basis) 7*. CHASE WILD ANIMAL FARM — Lawson Road, EGYPT, Mass.. U.S.A. * = Biological Supply Hou.ses. General Dealers. Zoological Collectors etc. f = Transactions on exchange basis 157 AVAILABLE WANTED 8. MARINE BIOLOGICAL LABORATORY Supply Department — WOODS HOLE, Mass.. U.S.A. 9. DEPT OF BIOLOGY, Coll. of Arts and Sci., Univ. of Rochester — ROCHESTER 3. N.Y.. U.S.A. Pleurodeles Waltlii, Xenopus laevis (throughout the year) 10.* J. C. NICHOLLS, Jr., Zoological Collector — MURPHY, N.C.. U.S.A. Urodela (adults of all species, lar- vae and eggs of some species): Am- (^Available" continued) bystoma (7 spec), Amphiuma spec), Triturus (4 spec); Anura means, Aneides aeneus. Crypto- (adults): Bufo (3 spec), Hyla (4 branchus alleganiensis, Desmogna- spec), Pseudacris (2 spec), Rana thus (8 spec), Eurycea (6 spec), (5 spec), Scaphiopus holbrooki; Gyrinophilus (5 spec), Hemidacty- Chiroptera (adults, most species lium scutatum, Leurognathus (2 throughout the year): Corynorhinus spec), Manculus quadridigitatus, macrotis, Eptesicus fuscus, Lasiurus Necturus (5 spec), Plethodon (15 borealis, Myotis (6 spec). Pipistrel- spec), Pseudotriton (6 spec), Pseu- lus subflavus dobranchus (2 spec). Siren (2 11. DEPT OF ZOOLOGY. Oregon State College — CORVALLIS, Ore., U.S.A. Microcebus (the dwarf lemur of Madagascar, $ and 9 ); any other Primates from the old and new worlds, except Macacus and Rhe- sus (live pregnant females) ASIA India 12.* VITA Limited — 29-31 Ropewalk St. Fort, BOMBAY, India Turkey 13. INST. OF HISTOL. AND EMBRYOL., Veterinary College, Univ. of Ankara — ANKARA. Turkey t Physa syriaca Germain (Pulmo- Amphioxus (fertilized eggs, morula nata) (April to October) and gastrula stages) EUROPE Belgium 14.* REPTILAMPHIBIA (Fehx Vandevelde) — Remerstraat. BAAL (Bra- bant). Belgium Triturus alpestris, Tr. cristatus. Tr. („Available" continued) cristatus carnifex. Pleurodeles Walt- (^ggs, young animals and adults) lii, Xenopus laevis; Lacertilia (all spec, throughout the year) Denmark 15. LAB. OF ZOOPHYSIOLOGY. Univ. of Copenhagen — Juliane Maries- vej 32. COPENHAGEN 0. Denmark Tetrahymena piriformis (=: T. ge- leii), Lwoff's strain (Ciliata) 158 AVAILABLE WANTED 16. INST. FOR ALM. ZOOL.. Univ. of Copenhagen — Universitetspar- ken 3. COPENHAGEN 0, Denmark Planaria vitta (a species which easily forms a clone for experimen- tal purposes) (throughout the year) France 17. DEP. D'EMBRYOLOGIE. Lab. d'Histol., Fac. de Med. de Nancy — 31 Rue Lionnois, NANCY (Meurthe et Moselle), France t Triturus alpestris, Tr. helveticus, Tr. cristatus (March to July) Ambystoma spp. Germany 18. ZOOL. INSTITUT der Univ. Gottingen — Nikolausbergerweg 75, GOTTINGEN. Deutschland Ephestia kiihniella Zeller (various („Availablc" continued) races), Galleria mellonella L., Ca- Tenebrio molitor (throughout the rausius morosus Br., Habrobracon year, against payment of packing- juglandis, Calliphora erytrocephala, and forwarding-charges) 19. ZOOL. INSTITUT der Univ. Koln — Kerpenerstr. 13, KOLN-LIN- DENTHAL, Deutschland f Ambystoma mexicanum, Xenopus Pleurodeles Waltlii laevis (throughout the year) 20. INST. FOR ANGEW. ZOOLOGIE der Univ. Wurzburg — Rontgen- ring 10, WORZBURG, Deutschland •}• Formica rufa rufo-pratensis and 2 9 of Atta sp., Acromyrmex sp., other Formicidae {S $, 9 ? and Dorylus sp., and Eciton sp. (For- worker-ants) (April to June) micidae). Italy 21. 1ST. DI ZOOLOGIA, Univ. di Milano — Via Celoria 10, MILANO, Italy t Various Amphibia (throughout the year) 22. 1ST. DI ZOOL. E ANAT. COMP. — Via Loredan 6. PADOVA, Italy I Ambystoma mexicanum, Triturus cristatus, Triturus taeniatus, Bufo bufo, Rana dalmatina, Rana escu- lenta (March to June) 23. 1ST. DI ZOOLOGIA, — Via Archirafi 18, PALERMO, Italy •f Discoglossus pictus (March to Triturus alpestris, Hynobius sp. May) Netherlands 24. PHYSIOL. LABORATORY, Municipal Univ. of Amsterdam — Rapen- burgerstraat, AMSTERDAM-C, Holland Locusta migratoria migratorioides, Hirudo medicinalis; Astacus fluvia- Leptinotarsa decemlineata (larvae tilis and adults) (throughout the year) 159 AVAILABLE WANTED 25. ANAT.-EMBRYOL. INST.. Municipal Univ. of Amsterdam kade 61. AMSTERDAM-O.. Holland Ambystoma mexicanum (1 — 2 years old) (throughout the year) 26. VEZEL INSTITUUT T.N.O Holland Cavia Cobaya Marcor, Mus mus- culus (not on exchange basis) 27.*CENTRAAL PROEFDIEREN BEDRIJF T.N.O UTRECHT. Holland Mus musculus (some strains, inbred during many generations, and small numbers of several mutants, among which Ay ^ homozygous-lethal yel- low. W =: macrocytic anaemia, and hair-colour and eye-colour mutants) , Mus rattus (two inbred strains and small numbers of hair-colour and eye-colour mutants), Cricetus crice- Sweden 28. ZOOLOGICAL INST., Uppsala Univ. — UPPSALA Maurits- Xenopus laevis (± 1 year old) — Mijnbouwstraat 16a. DELFT, Biltstraat 172, („ Available" continued) tus, Cavia Cobaya (3 strains), Oryctolagus cuniculus (4 strains, among which one strain inbred since 1937), Mustela putorius (small numbers), hybrid Mustela putorius X Mustela putorius furo (small num- bers) Ambystoma mature) Sweden mexicanum (sexually CAMBRIDGE, Eng- United Kingdom 29. ANATOMY SCHOOL, Univ. of Cambridge land Oryctolagus cuniculus, Mus rattus, Mus musculus. Cricetus cricetus (throughout the year) 30. INST. OF ANIMAL GENETICS — West Mains Road. EDIN- BURGH 9. Scotland f Triturus cristatus. Tr. palmatus, Triturus alpestris Tr. vulgaris (April to June) B. LIST OF SPECIES AVAIBLE with numbers referring to List A. (systematical order) EVERTEBRATA ARTHROPODA Evertebrates 1 Scorpiones 1 Myriopoda 1 PROTISTA Insecta Tetrahymena piriformis ( = T. Insects 1 geleii) (Lwoff's strain) 15 Calliphora erytrocephala 18 Carausius morosus Br. 18 VERMES AND ONYCHO- Ephestia kiihniella Zeller 18 PHORA Formica rufa rufo-pratensis 20 Peripatus 2 Formicidae 20 Planaria vitta 16 Galleria mellonella L. 18 Urechis caupo 3 Habrobracon juglandis 18 160 Leptinotarsa dcccmlineata 24 Triturus palmatus 30 Locusta raigratoria migra- Triturus taeniatus 22 torioides 24 Triturus vulgaris 30 Tencbrio molitor 18 Anura MOLLUSCA Anurans (South African 2 Gastropoda (giant land snai is) I Bufo (3 spec.) 10 Physa syriaca Germain 13 Bufo bufo 22 AMPHIBIA Discoglossus pictus 23 Amphibians 1, 21 Hyla (4 spec.) 10 Urodcla Pseudacris (2 spec.) 10 Ambystoma (7 spec.) Ambystoma mexicanum 11, 14, 10 25 Rana (5 spec.) Rana dalmatina 10 22 Amphiuma means Aneides aeneus Cryptobranchus alleganiensis 10 10 10 Rana esculenta Scaphiopus holbrooki Xenopus laevis 9, 14 22 10 19 Desmognathus (8 spec.) 10 REPTILIA Eurycea (6 spec.) 10 Reptiles 1 Gyrinophilus (5 spec.) 10 Lacertilia 14 Hemidactylium scutatum 10 MAMMALIA Leurognathus (2 spec.) 10 Cavia Cobaya Marcor 26, 27 Manculus quadridigitatus 10 Corynorhinus macrotis 10 Necturus (5 spec.) 10 Cricetus cricetus 27. 29 Plethodon (15 spec.) 10 Eptesicus fuscus 10 Pleurodeles Waltlii 9. 14 Lasiurus borealis 10 Pseudotriton (6 spec.) 10 Macaca mulata 6 Pseudobranchus (2 spec.) 10 Mus musculus 26, 27, 29 Siren (2 spec.) 10 Mus rattus 27. 29 Triturus (4 spec.) 10 Mustela putorius 27 Triturus alpestris 14, 17 Mustela putorius x M. p. furo 27 Triturus cristatus 14, 17, 22, 30 Myotis (6 spec.) 10 Triturus crist. carnifex 14 Oryctolagus cuniculus 27, 29 Triturus helveticus 17 Pipistrellus subflavus 10 C. LIST OF SPECIES WANTED witK numbers referring to List A. (syitematical order) PISCES Holocephali AMPHIBIA Urodela Ambystoma mexicanum Ambystoma spp. Hynobius sp. Pleurodeles Waltlii Triturus alpestris Anura Xenopus laevis MAMMALIA Primates Microcebus VERMES Hirudo medicinalis 24 ARTHROPODA Crustacea Astacus fluviatilis 24 Insecta Acromyrmex sp. 20 Atta sp. 20 Dorylus sp. 20 Eciton sp. 20 CEPHALOCHORDATA Amphioxus 13 23, 28 17 23 19 30 25 11 161 General questions and announcements I The Hubrecht Laboratory In the year 1954 for the first time an international team work will be held at the Hubrecht Laboratory, in order to stimulate and strengthen international cooperation in a very direct and practical way by a working together for half a year on a general problem of great actuahty and by exchanging personal experiences and opinions. Besides the concerted scien- tific approach to the general problem, the literature around the subject will be discussed critically in order to stimulate the reading of foreign hterature and ameliorate the form and accuracy of scientific publication. As a guarantee of a high scientific level, this team work is only open for postgraduates and exceptionally for very promising advanced students. The following scientists will participate in this first team work to be held from February 1st till July 31st (in chronological order of apphcation): 1) Miss V. M. McMurray (Phil.Dr), Univ. of Iowa, Iowa City, U.S.A. 2) D. J. McCallion (Phil.Dr), Acadia Univ., Wolfville, N.S., Canada 3) T. W. Glenister (Med.Dr). Charing Cross Hosp.. Univ. of London, England 4) M. Sala S.J. (Phil.Dr), Zool. Inst.. Padova, Italy 5) R. Mori (M.Sc), Biol. Inst., Toyama Univ.. Japan 6) O. Hassa (Dr Vet.M.), Vet. Fac, Inst. Histol. 6 Embryo!., Univ. of Ankara, Turkey 7) Miss D. Harari (M.Sc), Dept of Zool., Hebrew Univ., Jerusalem, Israel 8) K. Hara (M.Sc), Biol. Inst., Nagoya Univ., Japan 9) Miss M. Th. C. van Egmond (M.Sc), Zool. Inst., Univ. of Utrecht. Netherlands 10) Miss A. G. Johnen (Phil.Dr), Zool. Inst., Univ. of Cologne, Germany II The Central Embryological Library (C.E.L.) A Exchange of reprints: mailing list; etc. We want to thank those colleagues who sent us reprints and request them to continue to do so. A more or less complete collection of reprints as part of the C.E.L. may be of great use both to guest workers at the Hubrecht La- boratory and to investigators abroad, for borrowing reprints and for information about literature. This aim can only be attained by receiving reprints from as many investigators as possible. The Hubrecht Laboratory in its turn is distributing considerable numbers of reprints of its pubhcations. but this distribution is of course bound to certain hmits. Therefore only institutes and scientific teams can be placed on our mailing list. An exchange with individual investigators cannot unfortunately be upheld. As mentioned in previous issues all reprints are classified upon receipt according to a subject-classification-system which corresponds to that used in the G.E.I.S. This makes our collection of reprints particularly well accessable. May we remind you of our request to place in the C.E.L. those private collections of books and reprints which are iiot in use any more? In this way these collections become again accessable. just as is the case with material 162 donated to the Central Embryclogical Collection of slides and material of the Hubrecht Laboratory. 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 literature on certain subjects (according to the classification-system of the G.E.I.S.), for surveys of newly published literature, etc. 2. Every embryologist can borrow reprints which are not available in his own country. Books and Normal tables are usually not lent out, volumes of periodicals are only lent out to investigators in the Nether- lands. Conditions: a. Reprints may be borrowed for 3 months at the utmost (for the Netherlands 1 month), time for shipment not included. b. The receipt added to the consignment must be returned by return of post, after having been controlled and signed.. c. In case of high forwarding charges these have to be partly carried by the appHcant. 3. Every embryologist can personally consult the C.E.L. at all times. 4. The C.E.L. will be at the disposal of every embryologist working at the Hubrecht Laboratory. Ill The Central Embryological Collection of slides and material A The Collection; Concise Catalogue; etc. In the course of the last three years the collection has been entirely re- organized. The material has been arranged systematically and as much as possible according to the stageings of existing Normal Tables. In the beginning of 1954 a Concise Catalogue of the collection will be published and distributed among all embryological institutes. This publication contains also a bibliography of Normal Tables and similar publications. We trust that the accessability of the collection has improved very much by the reorganization and will still be improved by the establishment of a detailed card index to be completed in the course of 1954. Until now few workers were aware of the extensive and often extremely rare embryological material which the collection contains. B Conditions [or borrowing Conditions: 1. Slides, material in paraffin and/or material in alcohol can only be bor- rowed for one year, after which it has to be returned automatically in case no special request for extension of the loan has been made by the investigator and has been approved by the staff of the Hubrecht Laboratory. 2. Material in alcohol or paraffin has to be returned as such or in the form of well prepared slides which have been sectioned, stained and embedded properly, clearly labeled (name of species, thickness 163 and direction of sectioning, method of staining, etc.) and numbered according to given indications. 3. Costs of transport may be charged in case these surpass reasonable hmits. 4. Two copies of those pubhcations deahng with material from the Central Embryological Collection should be sent to the Central Embryological Library of the Hubrecht Laboratory. 5. In case material of the Central Embryological Collection has been used in investigations, it is respectfully requested that this be indicated in the pubhcations concerned. Restrictions: 6. Very rare or regularly consulted material can only be studied at the Hubrecht Laboratory. 7. Material belonging to the historical collection cannot be lent out. 8. In case material has not been treated properly or (after special request) has not been returned in time by an investigator, material will no longer be lent out to him or her. IV The Photographic Reproduction Service The Hubrecht Laboratory is willing to make photographic reproductions of any papers which are present in the Central Embryological Library or can be borrowed from elsewhere. These reproductions will be either positive transparent microfilm prints (for use in a microfilm reading apparatus) or enlarged ordinary prints. The negatives will remain at the Hubrecht Laboratory. We have been experimenting to find the most suitable materials and the best methods for reproduction. The result is the following price-list (prices per page, both text and plates): positive film prints: fl. 0.25 = $ 0.07 7 X 10 cm. (box-camera size): fl. 0.40 = $0.10 13 X 18 cm. (ordinary page size): fl. 0.50 = $0.13 18 X 24 cm. (large page size): fl. 0.65 = $0.17 V The Normal Table o f Xenopus laevis Dr D. R. Newth (London) has untertaken the description of the develop- ment of muscles and skeleton of the pelvic girdle and hind hmbs. Miss M. T. C. van Egmond (Utrecht) will study the development of the ear. Dr Bretscher (Bern) and Dr van de Kamer (Utrecht) have withdrawn from the project. The present situation of the project is as follows: We received the contributions of Dr Newth (London), Dr Smit (Stellen- bosch), Dr Ryke (Potchefstroom), Prof. Raven (Utrecht), Dr Kollros (Iowa City) and Dr Nieuwkoop (Utrecht). The contributions of Dr Millard (Cape Town), Prof. Ariens Kappers (Groningen) and Dr Bijtel (Groningen) are nearly completed. The subjects of the other collaborators are still in preparation; most of them make satisfactory progress. 164 Communicalions of tlie .Jnstitut International aEraDryoIogie" (Embryological Section of the I.U.B.S.) In response to a wish expressed at the last meeting of the I.I.E., in Italy a national Embryological Group has been formed for the promotion of cooperation between the Italian workers in the field of embryology, both animal and vegetal. To this end, the Group will hold periodical meetings for the exchange of views and informations, and the discussion of researches in progress. Its first meeting was held in Bologna, March 30 — 31, 1953. After a business session, a number of informal communications were presented. It was decided that a second meeting shall be held in the autumn of 1953 in Naples. Prof. Pasquini, Bologna, is the Secretary of the Italian Embryological Group. The Proceedings of the Symposium held at Utrecht on August 27th — 29th, 1952 (The biochemical and structural basis o[ morphogenesis), will appear before the end of 1953. Persons interested should apply to "Archives Neerlandaises de Zoologie", CO. the Librarian, Zoological Station, den Helder, Netherlands. The Secretary. Chr. P. RAVEN Reviews of recently puLIisIieJ textbooks on Embryology „LA RfeGfiNfiRATION ET LES PROBLfeMES DE LA MORPHOGENfiSE" 1932 by M. Abeloos ..Collection des actualites biologiques" 253 pp. with 57 figs in text Gauthiers-Villars Paris This book, which was already published in 1932 without the appearance of a new edition, cannot, of course, be called up to date, but gives nevertheless a rather comprehensive survey of the phenomenon of regeneration in the animal kingdom and in plants. Although the theoretical aspects are extensively discussed, their classification is not always well defined; e.g. no clear dis- tinction has been made between the processes of regulation in early develop- ment and the actual process of regeneration, processes which besides many similarities, differ from each other in several respects. The subject has been treated chronologically, so that first the onset of regeneration and the formation of a regeneration blastema is discussed and then the aspects of growth and differentiation, the origin of polarity and its role in the process of regeneration, the segregation of the regeneration blastema and the anomalies in regeneration. At the end of each chapter rich biblio- graphical data are given. It is our impression that in general the theoretical aspects had the main interest of the author, so that the facts form more or less material for illustration of certain points of view. The text has been more strongly sub- divided than would have been necessary when the subject would have been approached primarily from the analytical side and the theoretical discussion ■would have been placed at the end of the book. 165 Notwithstanding the special form of approach, this book can still be recom- mended as an interesting guide into the wide field of regeneration and morphogenesis in general. P. D. NIEUWKOOP ..EMBRYOLOGY" 1949 by L. G. Barth The Dryden Press 330 pp. with 194 figs New York price: $ 5.50 The author emphasizes the role of developmental processes in the entire hfe of the animal, so that a general knowledge of these processes is important for the premedical student, the college student or the biological student. The various chapters have been mainly arranged chronologically; the first ones are therefore deahng with the oviposition. the structure of the unfertilized egg, the process of fertihzation, cleavage, gastrulation and neurulation after which the later development has been treated according to organ systems. Special chapters have been inserted on the problem of field action, inter- relationships of developing structures, regeneration, growth and its relation to hormones, and the problem of sex differentiation, while some special chap- ters have been devoted to the development of the frog egg, the development of the chick embryo and to mammalian development. Each chapter has been treated very clearly and conveniently, and has been illustrated by simple but very instructive diagrams. The principle results of descriptive and experimental analysis and the existing theories have been properly discussed in each chapter. The text has been very clearly written and is very concise and accurate, so that it is a pleasure to read this textbook, which has moreover been illustrated with very well reproduced photographs. It is a pity that some of the pictures of the development of the chick blastoderm and the mammaHan embryo are too strongly reduced in size so that they are not so easily surveyable as the majority of the figures, while also some of the diagrams are somewhat too strongly schematized, which might interfere with a re- cognition of the natural relationships and topography. The chapter of sug- gested readings gives an extensive list of other textbooks to be referred to on each subject. We will highly recommend this textbook for teaching purposes and as a source for an introduction into the field of embryology for the embryology student. P. D. NIEUWKOOP .,MORPHOGENESIS, AN ESSAY ON DEVELOPMENT" 1952 by J. T. Bonner Princeton University Press 296 pp. with 90 figs and 9 plates Princeton, N.J. price: $ 5. — The complexity of the living organism and the enormous variety in forms induces us to search after the main principles on which the organisation of 166 living material must be based. The author tries to show in this essay on development how at least three principles seem to play a role in the structural organisation of living matter, viz. growth, morphogenetic movement and dif- ferentiation. External and internal limiting factors influence the individual roles of these processes in the development of structural patterns. Polarity and its determination also directs the achievement of structural pattern formation. This takes place inside a single cell as well as in cell aggregates, multicellular organisms and even in colonies of individuals. A comparison with the properties of crystals forms an interesting analogy as a possible bridge between the biological and the physico-chemical appreciation of the problems of life, which might lead according to the author to a "micro-structure theory". The text has been enriched with carefully selected, excellent illustrations, so that it is a pleasure to read this interesting essay. The bibliography includes unfor- tunately only a few references in foreign languages, which gives the wrong impression as if this approach of the problem of life is mainly made in the anglo-american part of the world. P. D. NIEUWKOOP , .CYTOCHEMISTRY" (A Critical Approach) 1953 by J. F. Danielli John Wiley & Sons, Inc.. New York 139 pp. with 8 figs in text Chapman 6 Hall, Ltd.. London and 12 photo-plates price: $ 4. — This book will by no means be called a textbook on cytochemistry, since according to the author "the body of agreed facts on cytochemistry is still completely insufficient"; it only represents a slightly enlarged version of a series of lectures given in 1949 at the University of Chicago. In the introduction of this book the elementary techniques are treated critically in order to show their applicability and their restricted value. In the following chapters some special cytochemical problems and the techniques used in their analysis are discussed more in extenso. while at the end a future outlook in cytochemistry is given. The author's critical approach to this young branch of biology might have great influence on its further growth, since it shows how great difficulties have to be overcome before reliable results can be obtained. We, nevertheless, think that the often still highly speculative working-hypotheses put forward in this book, do not always actually contribute to is in general high standard. For the field of embryology where the biochemical studies have been up till now so unsuccessful by the undifferentiated character and the small size of the material concerned, cytochemistry might offer new and very important methods of analysis. Here it will, however, be a first condition in the analysis to proceed very critically step by step in order to prevent serious disappoint- ments, and to avoid a further discredit of the field of embryology among the present and future young generations of scientists; put in the words of the author "the promise of the field of cytochemistry, however, will only be fulfilled if cytochemistry is used as a rigorous technique by an adequately trained staff". 167 We appreciate it very much that this first critical approach has been made, and warmly recommend this book to all embryologists. P. D. NIEUWKOOP Lilhe's ..DEVELOPMENT OF THE CHICK" (An introduction to Embryology) 1952 Revised by H. L. Hamilton Henry Holt and Co. 624 pp. with 283 figs New York price: $ 8.50 After a short introduction in which some general biological theories are followed historically, the structure of the male and female germ cell is described. The first part of the book deals with the early development till the end of the third day at which all organ systems have been laid down in their primitive form. The development of the egg in the ovary and its transport through tuba and uterus, the maturation and fertilization, the period of cleavage and the formation of a double-layered blastoderm till the stage at which the egg is normally laid, are discussed in extenso and illustrated with clear and original figures. Then the external development is pictured on the basis of the normal table of the chick, made by Hamburger and Hamilton, which has been fully reproduced in this textbook. This forms a very worthful extension of this new edition. The development of the primitive streak is described extensively on the basis of the most recent investigations, as well as the topography of the presumptive organ rudiments at the definitive primitive streak stage. The description o. the development of the embryo during the formation of the somites and the oucgrowth of amnion and allantois is illustrated with excellent picures. Special attention is paid to the development of the nervous system and the sense organs, the alimentary tract and the various mesodermal structures. After the third day the further development is treated according to organ systems; after the development of the external form and the embryonic mem- branes have been followed step by step all organs pass in review. The blood circulation is already briefly discussed in this chapter, but the colour plates, how attractive as pictured, only partly fulfil their purpose; the colours, red and blue, used respectively for the arterial and venous system, may be confusing since it is not clearly indicated that they do not coincide with the physiological condition of the blood for which they are normally also used. The development of the nervous system is discussed in detail. It would be advisable to mention the staining techniques used in the reproduced histological preparations. This would show the less experienced students that these structures have to be made visible with a special technique. The discussion of the various organ systems is done just as thoroughly as the description of the early development and offers a great richness of data illustrated with carefully selected or original figures, all of which are richly and clearly labelled. This textbook which gives such a detailed and wide picture of the develop- ment of the chick, will be received with great sympathy by all embryologists, and offers a rich material for study to the beginning as well as to the more 168 advanced student while the experienced investigator may also frequently use it in order to verify certain facts or to compare special topographical and temporal relations. It would therefore be advisable to mention the literature references in the text with year of publication in order to facihtate a reading of the original literature. The list of references of the various chapters could then be combined, so that repetitions would be avoided. The small deficiencies are only mentioned as possible suggestions for improvements of this in so many respects excellent textbook, with which we hke to congratulate the author and also ourselves very cordially. P. D. NIEUWKOOP ..AN OUTLINE OF GENERAL PHYSIOLOGY" Third Edition. 1952 by L. V. Heilbrunn W. B. Saunders Co. 818 p.p. with 123 figs Philadelphia-London price: S 10.50 It is pleasure to review this third edition, since the second edition, published in 1943, was gradually very much out of date by the rapid growth of this very extensive field of science. The author has put himself to a heavy task by bringing this new edition up to date. An enormous amount of literature had to be incorporated in the text, new problems had to be put forward. We must confess that we have great admiration for the form in which this enormous hterature (4300 references) has been brought together in this textbook. The author nearly always succeeded in giving the main facts in a very concise form against the background of the fundamental problems of life and hving material. The literature in foreign languages is richly represented. The references at the bottom of the pages may actually induce the students to read the original hterature, so that this textbook may have also a high didactic value. The subdivision of the extensive text, the simple and clear form of writing and the well chosen illustrations make this textbook to one of the most valuable sources of information and guides in this extensive field, so that we warmly recommend this excellent textbook, which the author so character- istically called an outline of general physiology, to all students in biology and medicine. We find that this book might not be lacking in any good laboratory library. P. D. NIEUWKOOP ..THE PRENATAL ORIGIN OF BEHAVIOR" 1952 by D. Hooker Porter Lectures, Series 18 143 pp. with 6 figs and 4 tabs Univ. of Kansas Press Lawrence (Kan.) price: $ 2.50 This book presents the subject matter treated by the author during his Porter Lectureship at the Kansas School of Medicine. As an introduction, in Chapter I the author gives a "necessarily rather superficial review", as he himself states on page 6, of the development of 169 behaviour in fishes, amphibians, reptiles, birds and infrahuman mammals. However inexhaustive. this chapter is exceedingly readable and stimulating owing to the clear and at the same time critical account of the work of the various authors, as well as to the attention paid to theoretical backgrounds. The main portion of the book is formed by a survey of the methods and results of the extensive and interesting researches carried out on human fetuses by the author and his co-workers at the Pittsburg School of Medicine, from 1932 onwards. Whereas the first part of the book deals only with what the author calls "overt" (externally visible) behaviour, in Chapter III some interesting considerations are given to the relations of behaviour with the internal (mor- phological and physiological) organization of the mammahan embryo and fetus. The principal points dealt with on the basis of a discussion of recent researches in this field, are the following: Morphological development and function of embryonic muscle; Development of reflex pathways; Types of initial reflexes (with a discussion of Sherrington's concept of the "simple reflex" and a critical discussion of the concepts of Windle and his associates); Effects of anoxia and asphyxia; Intra-uterine respiration; Function of kidneys, ahmentary tract and endocrine organs. A fundamental question playing a role in the entire book is the controversy between the "Coghilhan" concept of the development of behaviour (the "total pattern" idea) and the "Windehan" viewpoint (the idea of "successive addition of simple reflexes"), which has in particular been appHed to mammals. The author appears to be inchned towards the Coghilhan hne of thought, even in the case of mammals, where he bases himself largely on his own researches on the human fetus. The book contains a reference list presenting the most important older and recent literature, an index of names, and a very useful subject index. J. FABER ..PROBLEMS OF MORPHOGENESIS IN CILIATES" (The kinetosomes in development, reproduction and evolution) 1950 by A. Lwoff Volume of the Wiley Biol. Research series 103 pp. with 32 figs John Wiley & Sons Inc., New York Chapman 6 Hall, Ltd, London price: $ 3.50 The author directs our attention on a ve, fascinating problem of Hfe, the problem of self-reproduction, so well known for chromosomes and their con- stituents. This property of self-reproduction is however not restricted to the nucleus but also exists in the protoplasm, viz. e.g. in the so called kinetosomes, so characteristic for Cihates and other organisms. The kinetosomes do not form an irreversibly differentiated system, but can dedifferentiate into a plastic, self-reproducible system which is genetically controlled. One of their most interesting properties is their polyvalency. They can form ciha, flagellum, fibers, trichocysts, etc. These structures are rigid formations, but they can undergo dedifferentiation. In terms of Weiss' concept of "molecular ecology" the author tries to substantiate this purely theoretical concept in the properties and behaviour 170 of these visible elements among Darlington's so called "undefined residues of heredity ". This monograph which does not pretend to be a treatise or to give an exhaustive survey of the literature, is very clearly written and illustrated with very suggestive figures and highly worth to be read by biologists in general. P. D. NIEUWKOOP ..REGENERATION AND WOUND-HEALING" 1952 by A. E. Needham Methuen & Co Ltd 152 pp. with 5 figs and 3 tabs London price: 8s. 6d This small size book, forming one number in the series of monographs on biological subjects will only give a short illustrative introduction to this very extensive field of science which fascinated man already for many centuries. It will moreover form a key to the rich literature on this subject and will give a survey of the recent advances in its various aspects. After a short sketch of the normal sequence of events in regeneration, much attention has been paid to the metabohc events during regeneration and to the causal analysis of regeneration, two aspects on which many advances have been made during the last decades. After some smaller chapters on the rate of regeneration and on morphallaxis and related types of regeneration, finally the distribution of powers of regeneration in the animal kingdom has been briefly reviewed and its many- sided significance has been extensively discussed. The clearly written text and the very rich bibliographical data — there are more than 650 references quoted — makes this book to a very practical and convenient guide into the field of regeneration not only for school teachers but just as well for scientists. A larger number of illustrations would have undoubtedly improved the read- ableness of the text, but would of course also have advanced the price of this booklet. P. D. NIEUWKOOP ..TEXTBOOK OF HISTOLOGY" Second Edition. 1953 by J. F. Nonidez and W. F. Windle McGraw-Hill Book Co.. Inc. 528 pp. with 326 illustrations, composed New York-Toronto-London of 214 drawings and diagrams and price: $ 9.50 233 photomicrographs The author states in his preface that this textbook is for the beginner, so that it is not intended for a reference book since many details are intentionally lacking. This concise textbook which covers the histology and microscopic anatomy of the mammalian body, including man, is successfully used at the medical school in Philadelphia where medical education is. however, emphati- cally based upon direct contact with demonstration material in form of micro- scopic specimens and motion pictures. Much attention has. therefore, been paid in this textbook to the illustrations. These form indeed one of the most valuable aspects of this in several respects very elementary book. 171 The value of this textbook can only be determined in its planned educational system together with the special system of lecturing and particularly in combination with the extensive use of demonstration material and motion pictures, of which latter a rather extensive list has been added. Short hsts of references have been added at the end of each chapter; each reference with a brief review, which actually helps the student to find his way to the more detailed and extensive sources of information. A general shortcoming of this textbook is its rather static character; the dynamic aspects of histology and microscopical anatomy, in the form of e.g. the cychc changes and the processes of transformation during normal growth and during regeneration have been insufficiently focussed. P. D. NIEUWKOOP „ENTWICKLUNGSPHYSIOLOGIE DER INSEKTEN" 1952 by O. Pflugfelder Probleme der Biologie, Band 5 332 pp. with 126 figs Geest & Portig K.-G. Leipzig This is the first attempt to give a survey of the entire field of insect development only with a more summary treatment of the action of external factors and the general physiology of the developing insect. According to the author a rather extensive treatment of the morphogenetic processes is necessary for the right appreciation of the physiological aspects of development. The third chapter treats he organogenesis during embryo- have been brought together in one textbook. The subject has been treated chronologically starting with the primitive development. The morphological aspects are discussed first, after which the physiological problems are given according to the regulative, the partly regulative and partly determinative, and the pronounced determinative types of development. The third chapter treats the organogenesis during embryo- logical and post-embryological stages, while the last chapter of this book is devoted to the extensive field of hormonal actions during post-embryonic hfe. We feel that this attempt to bring together the morphological and physio- logical aspects of development is of very great importance in order to bridge the gap between these often separated fields of research, in order to under- stand that form and function are a unity which cannot be spht into separate parts. The concise text of this book which is so clearly written, has been illustrated with a large number of clear figures, which makes it even more easily readable. The very rich bibhography forms an excellent guide in this very extensive literature, so that we can highly recommend this textbook to advanced students. It moreover forms an excellent source for literature for embryologists interested in problems of morphogenesis and developmental physiology of insects. We, therefore, hope that this german textbook might also find its way in many countries of other continents. P. D. NIEUWKOOP 172 ..ENTWICKLUNGSPHYSIOLOGIE DER TIERE" 1953 bij F. Seidel Sammlung Goschen, I Ei und Furchung (126 pp. with Band 1 162 and 1 163 29 figs in text) Walter de Gruyter & Co. II Korpergrundgestalt und Organ- Berlin bildung (159 pp. with 42 figs pocket-book size in text) price: D.M. 2.40 The author gives a general survey of the causal analysis of the animal development in a very concise form, and synthesizes the facts obtained in the various groups of the animal kingdom to more general concepts. Mostly, classical experiments are taken as examples, the most recent development not always including. The discussion is mainly restricted to the more principal facts, omitting the finer details and controversies, so that this pocket book actually forms only an introduction into the field of experimental embrvology. As such it is very successful and very useful for students interested in this field of science; the more since it has been very clearly written, and since these editions are very cheap, so that they are within the means of every student. A fortunate idea forms the concise chapter : explanation of terms and concepts. The replacement of the normal list of references by a very short hst of handbooks and review articles as keys to the literature has the disadvantage that students are not directly stimulated to read the original literature. It might have been better when the systematical register would have been replaced by an extensive list of references. P. D. NIEUWKOOP „THE FROG. ITS REPRODUCTION AND DEVELOPMENT" 1951 by R. Rugh The Blackiston Cy, Inc. 336 pp. with circa 167 figs New York price: $4.25 In the preface the author clearly justifies the appearance of an extensive study on the normal development of a single form as an indispensable base for an experimental approach in embryology. The american Leopard frog, Rana pipiens. has been chosen since so much work in experimental embryology, physiology, cytology and genetics has and can be done on this laboratory animal. After a brief historical survey of the development of the field of science called embryology, some basic theories in embryology are discussed. The development of the male and female germ cells, their maturation and subsequent fertilization are extensively described and illustrated with many figures and photographs. Then blastulation and gastrulation are extensively treated, including many data on vital staining etc., after which neurulation and early organogeny are discussed from a large number of diagrams and figures. In the same style the major developmental changes in the early embryo and larva are described. The second part of the book deals with the development of the individual 173 organ systems as derivatives of special germ layers so that the attention of the reader is focussed on the development of each organ system. The large number of illustrations markedly facihtates the reading of the text which is moreover written in a semi-popular form so that this book is of great value for teaching purposes. For the embryology student it moreover gives many valuable data on each successive phase of development so that we can recommend this book to a wide circle of readers. The extensive glossary of embryological terms at the end of the book forms a very valuable chapter and may serve as an example for other textbooks. The fairly extensive bibliography for frog embryology finally facilitates and stimulates the reading of the original Hterature. It is a pity that some of the diagrams, e.g. in the chapter on early organo- geny, are too strongly simpHfied, which may lead to confusion at certain points. It might moreover be preferable to number the figures so that one can refer more easily to them in other parts of the text. These remarks, however, form only a suggestion for improvement of a new edition. This textbook as a total forms a very valubale unit in the series of monographs on development of individual forms such as Lilhe's Development of the chick, etc. P. D. NIEUWKOOP „ENTWICKLUNGSPHYSIOLOGIE" 1952 by L. V. Ubisch F. W. Peters 85 pp. with 127 figs Berlin This small monograph only forms an introduction into the field of develop- mental physiology and gives only some principle facts and problems against the background of the authors vision on development given in the later chapters of this booklet. A number of characteristic forms is chosen among invertebrates and vertebrates, forms on which the problem of "determinative" and "undeterminative" development is illustrated, after which the classical concepts of determination, organization and induction are discussed. After a discussion of Child's gradient-theory and the role of special cell-constituents, the author emphasizes the significance of the colloidal state of the so called "ground-plasm". This ground-plasm should be under the influence of three gradient systems along the three axes of the embryo. The genes operate in this three-dimensional gradient-system of the plasm colloids and activate the development of special organ-systems in a mutual harmonic topography and proportion. Although the train of thought of the author is quite interesting, the hypo- thesis to which it leads is very general and rather simplistic. Too few basic facts are, however, known than that general theories might bring us much further to an understanding of the basic principles of hfe. P. D. NIEUWKOOP ..ELEMENTS OF CHORDATE ANATOMY" 1953 by Ch. K. Weichert McGraw-Hill Book Comp.. Inc. 451 pp. with 256 figs in text New York-Toronto-London price: $ 5.50 This text book is a condensation of "Anatomy of the Chordates" by the 174 same author, published in 1951 and has especially been designed to serve as a text in one-semester courses for premedical students. This book will only offer the elementary principles of vertebrate anatomy. A companion volume entitled "Representative Chordates" has been prepared for use in the practical one-semester courses. The discussion and characterization of the successive systematical groups of the phylum chordates which is lacking in the majority of textbooks on comparative anatomy forms a great advantage of this book. Besides the many other good aspects, such as the clearly written and consistently subdivided text and the many easily surveyable. well labelled figures which illustrate the text very conveniently, we feel that many comparative anatomical problems should be markedly elucidated when more attention should have been paid to the development of the various organ systems. This is particularly striking for the chapters on the reproductive system where the bisexual character of its anlage has not been focussed. the heart, the internal ear and other organ systems. The total lack of references does not stimulate the students to supplemental reading. P. D. NIEUWKOOP MBL WHOI LIBRARY UH IBbE a