a. Factors promoting or inhibiting hatching of embryos. Hymenotepis spp. 

 (Cyclophyllidea, Cestodes) 



b. Development of embryos or oncospheres in the intermediate host. Hyme- 

 notepis spp. (Cyclophyllidea, Cestodes) 



VOLKOVA, Miss L. S. Cand.med.sci. — Inst, of Exper. Biol., Acad, of Med. 

 Sci. of the U.S.S.R., Baltiyskaya 8, MOSCOW A-315, U.S.S.R. 



a. Immunological factors in the pathogenesis of haemolytic disease in new- 

 borns. Homo sapiens (Primates) 



b. An experimental model of haemolytic disease. Transplantation immunity 

 and the immunological problem of pregnancy. Rattus norvegicus, Orycto- 

 lagus cuniculus (Rodentia), (Anthropoidea) 



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

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



a. Embryonic temperature adaptations in various species. Bufo americanus. 

 B. terrestris, B. fowled, B. woodhousei, B. valliceps (Anura) 



b. Inheritance of color patterns. Rana pipiens (Anura) 



c. Interspecific hybridization. Bufo terrestris, B. fowleri, B. valliceps (Anura) 



d. Descriptions of larvae. Bufo valliceps, B. quercicus, Rana palmipes, R. 

 capito sevosa (Anura) 



e. Development, sex and pigmentary patterns of gynogenetic diploids. Rana 

 pipiens (Anura) 



f. Gene dosage studies involving mutant color patterns. Rana pipiens 

 (Anura) 



g. Production of chimeric mutant animals. Rana pipiens (Anura) 



VOY, A. Dr. es Sci. — Lab. de Zool. et Biol, anim., Fac. des Sci., POI- 

 TIERS, Vienne, France 



VRIES, B. J. de M.Sc. — Zool. Inst., Fac. of Sci.. Univ. of Stellenbosch, 

 STELLENBOSCH, Republic of South Africa 



— Dept. of Zool., Univ. Coll. of the Western Cape, BELLVILLE, C.P., 

 Republic of South Africa 

 a. Development of the genital system. Helix aspersa (Pulmonata, Gastro- 

 poda) 



VSEVOLODOV, E. B. — Dept. of Embryol., Fac. of Biol.. Moscow Univ., 

 MOSCOW V-234, U.S.S.R. 



a. Using some methods of experimental ophthalmology (induced retinal 

 degeneration, experimental cataractogenesis) to analyse the nature of 

 the lens polarity, its stability in normal conditions and its instability 

 (posterior lens epithelium migration and differentiation) in pathology. 

 Oryctolagus cuniculus (Lagomorpha) 



b. Experiments to study the role of extralenticular factors contributing to 

 the restoration of adult lens polarity in the course of regeneration or 

 regulation. Oryctolagus cuniculus (Lagomorpha) 



VYASOV, O. E. Dr.Med., M.I.I.E. — Inst, of Exper. Biol., Acad, of Med. 

 Sci. of the U.S.S.R., Baltiyskaya 8, MOSCOW A-315, U.S.S.R. 



a. The formation of organ- and stage-specific proteins (antigens). (Verte- 

 brata) 



b. Study of antibody-like substances in embryonic cells which react with 

 antigens specific for early developmental stages. (Vertebrata) 



c. Study of immunological tolerance. (Vertebrata) 



d. Study of interrelations between organs of mother and fetus. 



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