a. Nucleo-cytoplasmic relations in normal and tumour (Ascites) cells. 

 VANNINI. E. Dr. M.I.I. E.. Prof. — 1st. di Zool. e Anat. comp., Via Uni- 

 versita 4. MODENA, Italia 



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

 ( Echinodermata, Pisces, Amphibia) 



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

 cortico-adrenal blastema. (Amphibia. Aves, Mammalia) 



c. Experimental analysis of the causal development of the gonads. (Am- 

 phibia) 



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

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



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



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 

 a. Cell-lineage in normal and Li-treated embryos. Limnaea stagnalis (Gas- 

 tropoda) 

 VEREJSKAJA, Miss V. N. Cand.Biol.Sci. — Inst, of Animal Morphol. of 

 the Acad, of Sci. of the U.S.S.R., Bolshaja Kalushskaja 33. MOSCOW 

 V-71, U.S.S.R. L. (Lepidoptera) 



a. Influence of high temperatures on developmental processes. Bombyx mori 

 h. Analysis of sterihzing effect of sublethal high temperatures on eggs 

 infected with Nosema bombycis. Bombyx mori L. (Lepidoptera) (in col- 

 laboration with Mrs T. A. BEDNJAKOVA) 

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



NORTHAMPTON, Mass., U.S.A. 

 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 Verte- 

 bres. (Amphibia, Aves) 

 VIVIEN. J. H. Dr es Sci.. Prof. —Lab. de Zool. et d'Embryol. exper., Inst, 

 de Zool. et de Biol, gener.. 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. MOHSEN) 



b. Morphogenese et physiologic embryonnaire des glandes endocrines. 

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

 J. SCHOTT) 



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

 collaboration avec Miss D. HAY et J. SCHOTT) 



d. Morphogenese du tractus genital et des gonades. Emys leprosa (Chelo- 

 nia), (Ophidia) (en collaboration avec Miss Y. STEFAN) 



e. Origine de la lignee germinale. morphogenese et differenciation des go- 

 nades. Xiphophorus Helleri, Lebistes reticulatus, Barbus spec. (Teleos- 

 tei) (en collaboration avec E. FOLLENIUS) 



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



U.S.A. 

 VOLPE. E. P. Ph.D. — Dept of Zool., Newcomb Coll. of Tulane Univ., 



NEW ORLEANS 18, Louisiana, U.S.A. 



113 



