Tus-Vol 



TUSQUES. I. M. Dr en Med., Dr es Sci.. Prof. — Lab. d'Histol., Fac. dc 



Med., 16. Quai Moncousu, NANTES, France 

 a. Analyse de Taction niorphogenetique de la thyroxine. Anguis [ragilis 



(Laccrtilia). Rattiis albiniis (Rodentia), Talpa Europaea (Insectivora) 

 TWITTY V. C. Dr, F.I. I.E.. Prof. — Dept of Biol. Sci.. Stanford Univ., 



STANFORD, Cal.. U.S.A. 

 TYLER A. Ph.D.. F.I. I.E.. Prof. — Dept of Embryol., Div. of Biol., Calif. 



Inst, of Tcchnol.. PASADENA 4, Cal.. U.S.A. 



a. Physiology of fertilization. (Echinoidea) 



b. Physiology of early development. (Echinoidea, Polychaeta) 



c. Life-span, motility and metabolism of spermatozoa. (Echinodermata, 

 Annelida. Mollusca, Aves, Mammalia) 



d. Immuno-embryology. (Echinodermata etc.^ 



UBBELS, Miss G. A. M.Sc. — Centrum voor Electronenmicroscopie, Jans- 



kerkhof 3, UTRECHT, Holland 

 UBISCH, L. V. Dr jur. et phil.. F.I.I.E.. Prof. (Emer.) — PARADIS. Norge 



no embryological work in progress) 

 ULRICH, H. Dr phil., Prof. — Zool. Inst., Eidg. Technische Hochschulc. 



Universitatsstr. 2, ZURICH, Schweiz 

 a. Action of X-rays on nucleus and cytoplasm of eggs, and on embryolo- 

 gical stages. Drosophila melanogaster (Diptera) 

 URBANI, E. Lib.Doc, M.I. I.E. — 1st. di Anat. comp. dell'Univ., Fac. di 



Sci., Via Borelli 50, ROMA, Italia 

 URBANI— MISTRUZZI, Mrs L. Dott. — 1st. di Anat. comp. delTUniv.. 



Fac. di Sci.. Via Borelh 50. ROMA. Italia 

 VACEK, Z. MUDr — Embryolog. ustav lekafske fak. Univ. Karlovy. Al- 



bertov 4, PRAHA II, Czechoslovakia 



a. Development of the innervation of the gonads. Homo sapiens (Primates) 



b. Experimental analysis of the development of the autonomic nervous 

 system. Gallus domesticus (Aves) 



VAHS. W. Dr Phil. — Zool. Inst, der Univ. Koln. Kerpenerstr. 13. KCLN- 

 LINDENTHAL, Deutschland 



a. Die Beeinflussung der Leistungsspezifitat abnorraer Induktoren in der 

 Entwicklung. (Amphibia) 



b. Histochemische Untersuchung der Induktionsvorgange. Triturus spec. 

 (Urodela) 



c. Entwicklung unter dem Einfluss von Antimetaboliten. (Urodela) 

 VAINIO, E. T. M.D. — Zool. Lab., Univ. of Helsinki. P. Rautatiekatu 13. 



HELSINKI, Finland 



a. Teratomas caused by xenoplastic transplantations of embryos and ger- 

 minal layers. Xenopus laevis, Triturus spec. (Amphibia) 



b. The antigenicity of different germinal layers. Triturus spec. (Urodela) 



c. The immunological properties of experimental teratomas. Triturus spec. 

 (Urodela) 



VAKAET, L. C. M.D. — Lab. of Anat.. Fac. of Med.. Univ. of Gent, 



Bylokekaai 1. GENT, Belgium 

 VANDEBROEK, G. Dr Sc. Prof. — Lab. d'Embryol.. Inst, de Zool.. Univ. 



de Louvain. 71 Rue de Namur, LOUVAIN. Belgique 

 VANDERHAEGE— HOUGARDY. Mrs F. Dr en Sci. — Lab. de Mor- 



phol. anim., Univ. libre de Bruxelles, 1850 Chaussee de Wavre. BRU- 



XELLES-Auderghem, Belgique 



112 



