Vand 90 Vri 



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

 de Louvain. 71 Rue de Namur, LOUVAIN, Belgique. 

 (no data received over some years) 

 VANNINI, E. Dr, Prof. — 1st. di Zool. e Anat. comp., Via Universita 4. 

 MODENA, Italia, 

 a. Cycle of the nucleic acids and nucleolar changes during oogenesis. 



(Annelida, Echinodermata, Pisces, Amphibia) 

 h. Development of the gonads and their embryological relations with the 

 cortico-adrenal blastema. (Amphibia, .i4i;es. Mammalia) 



c. Experimental analysis of the causal development of the gonads. 

 (Amphibia) 



d. Experimental regeneration and genesis of the germ-cells. (Polychaeta) 



e. Development of the gonads. Xenopus laevis (Anura) (Normal Table) 

 VASSEUR E. J E. Ph.D — Wenner-Grens Inst, for experimental Biology, 



Norrtullsgatan 16. STOCKHOLM Va., Sweden, 

 a. Action of dissolved jelly coat substance (fertilizin) on the spermatozoa. 



Studies on the chemical composition of the jelly substance and the 



species specifity of its chemical composition. (Echinoidea) 

 VERHAGEN. Th. G. M. — Zool. Lab. der Rijks Univ.. Janskerkhof 3, 



UTRECHT. Holland, 

 a. Cytology of the saccus vasculosus. Scyllium canicula (Selachii) 

 VERMAAK. D. B.Sc. — Zool. Inst., Univ. of Stellenbosch. STELLEN- 



BOSCH. S. Africa, 

 a. Ontogenesis of commissural connexions of the vena pudenda externa 



and V. p. interna in an advanced embryo. Homo sapiens (Primates) 

 VIGLIANI, F. Dr — Inst, of human Anat., Corso Massimo d'AzegHo 52. 



TORINO, Italy, 

 a. Late development and growth of bones, joints and muscles in mechani- 

 cally inert and denervated limbs. Canis familiaris (Carnivora) 

 VILLAFRANCA. G. W. de B.S. — Osborn Zool. Lab., Yale Univ.. NEW 



HAVEN 11, Conn., U.S.A. 



— Smith Coll.. Dept of Zool., NORTHAMPTON, Mass., U.S.A. 

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



the development of contractibility. Mus norvegicus albinus (Rodentia) 



(under direction of E. J. BOELL) 

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



1 Place de I'Hopital. STRASBOURG. France, 

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



tebres. (Amphibia) 

 VISSCHEDIJK. A. H. J. — Zool Lab. der Rijks Univ.. Janskerkhof 3. 



UTRECHT, Holland, 

 a. Influence of temperature shock. Limnaea stagnalis (Gastropoda) 

 VITAGLIANO. G. Dr Sc. — 1st. di Genet. dell'Univ. di Napoh. Fac. di 



Sci., Via Mezzocannone 8, NAPOLI, Italia. 



(no data received over some years) 

 VOGT, Miss M. M.D. — Hirnforschungs-Institut, NEUSTADT, Schwarz- 



wald, Germany (present address: Dept of Biol., California Inst, of 



Technol.. PASADENA 4, Cahf., U.S.A.) 



(no embryological work planned for 1952) 

 VRIES, Miss L. G. de — Zool. Lab. der Rijks Univ., Janskerkhof 3. 



UTRECHT, Holland. 



