a. Morphogenesis and physiology of pineal gland. (Aves) 



b. Morphogenesis and physiology of blood. (Aves) 



c. Experimental morphology of pineal gland. Bovidae (Mammalia) 

 VERDONK, N. H. B.Sc. — Zool. Lab. der Rijks Univ.. Janskerkhof 3, 



UTRECHT. Holland 



— Hubrecht Lab., Intern. Embryol. Inst.. Janskerkhof 2, UTRECHT, 



Holland 



a. Respiration of eggs and embryos. Limnaea stagnalis (Gastropoda) 



b. Induction of tail mesoderm. Ambystoma mexicanum (Urodela) 

 VERGROESEN, A. J. — Anat.-Embryol. Inst.. Municipal Univ. of Amster- 

 dam, Mauritskade 61. AMSTERDAM O. Holland 



a. Studies on the factors leading to accumulation and determination of 

 blastemata in regeneration; the role of the skeleton. (Urodela) (in col- 

 laboration with H. A. L. TRAMPUSCH) 

 VILLAFRANCA, G. W. de Ph.D. — Dept of Zool.. Smith College. 

 NORTHAMPTON, Mass., U.S.A. 



a. Studies of various enzyme fractions in developing muscle in relation to 

 the development of contractibility. Mus norvegicus albinus (Rodentia) 



b. Studies on the myosin proteins in the differentiation of muscle. Mas 

 norvegicus albinus (Rodentia) 



VINTEMBERGER, P. Dr Med.. Prof. — Inst. d'Embryol. Fac. de Med.. 

 1 Place de I'Hopital, STRASBOURG, France 

 a. Recherches sur le determinisme de la symetrie bilaterale chez les Ver- 

 tebres. (Amphibia, Aves) 



VISSER, Miss P. J. — Anat.-Embryol. Inst.. Municipal Univ. of Amsterdam, 

 Mauritskade 61. AMSTERDAM O. Holland 

 a. Studies on the factors leading to accumulation and determination of 

 blastemata in regeneration; the role of the skin. (Urodela) (in colla- 

 boration with H. A. L. TRAMPUSCH) 



VIVIEN, J. Prof. — Lab. de Zool., Inst, de Zool. et de Biol, gen., Fac. des 

 Sci.. 12 Rue de I'Universite. STRASBOURG. France 



a. Morphogenese des gonades et du tractus genital. (Selachii, Teleostei) 

 (en collaboration avec J. J. THIEBOLD et Th. MOSEN) 



b. Morphogenese et physiologie embryonnaire des glandes endocrines. 

 (Selachii, Teleostei) (en collaboration avec R. RHCHENMANN et 

 J. SCHOTT) 



c. Analyse du processus de regulation et de paragenese. (Selachii) (en 

 collaboration avec D. HAY et J. SCHOTT) 



VIVIER, Miss F. — Lab. d'Histol., Dep. d'Embryol., Fac. de Med., 31 Rue 



Lionnois, NANCY (Meurthe 6 Moselle), France 

 VOGEL, N. W. — Dept of Zool., Indiana Univ.. BLOOMINGTON. Ind., 

 U.S.A. 

 a. The development of pituitary-gonad interactions. Gallus gallus (Aves) 

 VOGELSANG, Miss C. Anat.-Embryol. Inst., Municipal Univ. of Amster- 

 dam, Mauritskade 61, AMSTERDAM O, Holland 

 a. Studies on the factors leading to accumulation and determination of 

 blastemata in regeneration; the role of the nerves. (Urodela) (in colla- 

 boration with H. A. L. TRAMPUSCH) 

 VOY, A. Dr es Sci. — Lab. de Zool., Fac. des Sci.. POITIERS, Vienne. 

 France 

 a. Croissance, regeneration. (Orthoptera) 



105 



