POLEZHAEV, L. V. Dr.Biol.Sci., F.I.I.E., Prof. — Inst, of Animal Morphol., 

 Acad, of Sci. of the U.S.S.R., First Academic St. 12, MOSCOW V-133, 

 U.S.S.R. 



a. Regeneration of cranium bones. Mus domesticus, Rattus norvegicus, Oryc- 

 tolagus cuniculus, Felis domestica, Canis familiaris (Mammalia) 



b. Regeneration of dental tissue. Canis familiaris (Carnivora) 



c. Regeneration of myocardium. Rattus norvegicus, Oryctolagus cuniculus, 

 Felis domestica (Mammalia) 



d. Restoration of regeneration capacity of limbs after X-irradiation. Am- 

 bystoma mexicanum (Urodela) 



e. Regeneration of the brain. Felis domestica, Canis familiaris, Rattus nor- 

 vegicus (Mammalia) 



POLTEVA, Mrs. D. G. — Dept. of Embryol., Leningrad Univ., Mendeleevs- 



ky St. 5, LENINGRAD, U.S.S.R. 

 a. Regeneration and somatic embryogenesis. Pelmatohydra oligaetis (Hy- 



dvozoa) , Actinia equina, Metridium dianthus, M. senile (Hexacorallia), 



and other spp. (Coelenterata) 

 PONCET (MERLE), Mrs. S. Lic.es Sci. — Lab. de Zool. exper., Fac. des 



.Sci. de Lyon, 43 Bd. de l'Hippodrome, VILLEURBANNE, France 

 a. Metabolisme des acides nucleiques au cours du developpement. Arbacia 



lixula (Echinoidea) 

 PONTIER, J. Lic.es Sci. — Lab. de Zool. exper., Fac. des Sci. de Lyon, 43 



Bd. de l'Hippodrome, VILLEURBANNE, France 

 a. Analyse factorielle appliquee a l'etude de la morphogenese. Myzus per- 



sicae (Aphididae, Rhynchota) 

 POPOV, V. V. Dr., Prof. — Dept. of Embryol., Fac. of Biol., Moscow 



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



a. Developmental physiology of the sense organs, and the significance of 

 irritability for the evolution of morphogenesis. 



b. Significance of the morphogenetic properties of the layers of the retina 

 for the development of the dioptric system of the eye. 



POPP, R. A. Ph.D. — Biol. Div., Oak Ridge National Lab., P.O. Box Y, 



OAK RIDGE, Tenn., U.S.A. 

 PORTMANN, A. Dr.Phil., Prof. — Zool. Anstalt der Univ., Rheinsprung 



9, BASEL, Schweiz 

 POTEMKINA, Mrs. D. A. Cand.biol.sci. — Dept. of Embryol., Fac. of Biol., 



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



a. Causal analysis of the formation of the Mullerian ducts, in particular 

 the interactions between nephric system and gonadal ducts. (Anura) 



b. The formative connections between the epithelial and mucosal components 

 of the oviduct and the connective tissue stroma. (Anura) 



POULSON, D. F. B.S., Ph.D., M.I.I.E., Prof. — Dept. of Biol. (Osborn 

 Lab. ) , Yale Univ., NEW HAVEN 1 1 , Conn., U.S.A. 



a. Mid-gut: genesis and differentiation. Dvosophila melanogaster (Diptera) 



b. Chromosomal control of differentiation. Drosophila melanogaster (Dip- 

 tera) 



c. Neurogenesis in normal and genetically deficient embryos. Drosophila 

 melanogaster (Diptera) 



d. Maternally inherited sex-ratio disturbances of development. Drosophila 

 bifasciata, D. melanogaster, D. willistoni (Diptera) 



e. Developmental genetics. Drosophila nebulosa (Diptera) 



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