Urbani-Voy 



d. Ricerche sugli enzimi nella vita latente. (Phyllopoda. Crustacea) 



e. Ricerche sugli enzimi negli eritrociti. (Vertebrata) 



f. Ricerche sugh enzimi nello sviluppo. (Amphibia) 



URBANI— MISTRUZZI. Mrs L. Dott. — 1st. di Anat. comp. dell'llniv., 

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



a. Ricerche sulle parabiosi. (Aniira and Urodela) 



b. Ricerche sulle formazioni ergastoplasmatiche e sul ciclo secretorio. (Pul- 

 monata. Gastropoda) 



VAHS. W. Dr Phil. — Zool. Inst, der Univ. Koln. Kerpenerstr. 13. K5LN- 



LINDENTHAL. Deutschland 

 a. Die Becinflussbarkeit der Leistungsspezifitat abnormer Induktoren in 



der Entwicklung. (Amphibia) 

 h. Der Einfluss der Wirtsregion auf die ventrale Sekundarinduktion. Tri- 



turns (Urodela) 



c. Histochemische Untersuchung der Induktionsvorgange. Triturus (Uro- 

 dela) 



d. Der Einfluss von UV-Licht auf die Induktionsvorgange. Triturus (Uro- 

 dela) 



VAINIO. E. T. M.D. — Dept of Physiol.. Zool. Lab.. Fac. of Mathem. and 

 Nat. Sci.. Univ. of Helsinki. P. Rautatiekatu 13. HELSINKI, Finland 

 a. Teratomas caused by xenoplastic transplantations of Triturus embryos 



and different germinal layers. Xenopus laevis, Triturus (Amphibia) 

 h. The antigenicity of different germinal layers. Triturus (Urodela) 

 c. The immunological properties of experimental teratomas. Triturus ft/ro- 

 dela) 

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

 Bylokekaai 1 . GENT. Belgium 

 a. Cv'tochemistry of ovocytes. Lebistes reticulatus (Teleostei) 

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



Univ. de Louvain. 71 Rue de Namur. LOUVAIN. Belqique 

 VANDERHAEGE— HOUGARDY, Mrs F. Lie. en Sci. Botan. — Lab. de 

 Morphol. anim.. Univ. libre de Bruxelles, 1850 Chaussee de Wavre. 

 BRUXELLES-Auderghem, Belgique 

 a. Nucleo-cytoplasmic relations. (Amphibia) 

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

 MODENA. Itaha 

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



nodermata, Pisces and Amphibia) 

 h. 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) 

 VASSEUR, E. J. E. Ph.D. — Wenner-Grens Inst, for experim. Biol.. 



Norrtullsgatan 16. STOCKHOLM Va.. Sweden 

 VEENSTRA— TROLLOPE. Mrs E. M. B.Sc.Hons. (Rand.) — Dept of 



Zool.. Univ. of the Witwatersrand, Milner Park, JOHANNESBURG. 



South Africa 

 a. The effects of anti-orqan sera on developing embryos. Gailus domesticus 

 VENZKE. W. I. D.V.M\. M.Sc, Ph.D. — Dept of Vet. Anat., Ohio State 



Univ., COLUMBUS 10, Ohio, U.S.A. 



104 



