PIRRONE, Miss A. M. — 1st. di Anat. Comp., Univ. di Palermo. Via Archirafi 20, 90123 



PALERMO, Italy 

 a RNA synthesis in early development. Paracentrotus lividus (Echinoidea) 

 PLAS, Mrs. C. Dr.3e Cycle — Lab. de Physiol. Anim., Fac. des Sci., B.P. 347, 51 REIMS, 



France 

 a Pre- and postnatal changes in glucose and glycogen metabolism of the liver cell; in vivo 



and in isolated cultured hepatocytes. Rattus norvegicus (Rodentia) (with R. L. 



JACQUOT) 

 PLASOTA, K. J. M.Sc. — Dept. of Vert. Zool., Univ. of Warsaw, Krakowskie Przed- 



miescie 26/28, WARSZAWA 64, Poland 

 a Development of the chondrocranium and ossification of the bony skull. Rana temporaria, 



Pelobates fuscus (Anura) 

 PLEEGING. J. H. Med.Drs. — Dept. of Anat. and Embryol, State Univ. of Groningen, 



Oostersingel 69, GRONINGEN, Netherlands 

 a Topographical relationships in the intestine during ontogenesis. Mus musculus (Rodentia) 

 b The origin of the pronephric duct. Mus musculus (Rodentia) 

 PLESNER, P. M.D., Prof. — Dept. of Molec. Biol., Odense Univ., 230 Hjallesevej, 5000 



ODENSE. Denmark 

 POELS, C. L. M. Ph.D. — Center for Pathobiol., Univ. of California, IRVINE, Calif. 



92664, U.S.A. 

 a Various developmental characteristics induced by ecdysone, especially correlation of the 



functional and structural occurrences in tissues stimulated by ecdysone, e.g. in salivary 



glands. Drosophila melanogaster (Diptera) 

 POHLEY. H. J. Dr., Prof. — Inst, fur Entw.physiol., Univ. zu Koln, Gyrhofstr. 17, 5 KOLN 



41. W.Germany 

 a Theoretische und experimentelle Untersuchungen iiber 1) Regeneration and Hautung, 2) 



Regulation des Zellteilungswachstums. Ephestia kuhniella (Lepidoptera) , Periplaneta 



americana (Blattariae) 

 b Modelldarstellung entwicklungsphysiologischer Systeme mit Hilfe von programmgesteuerten 



Rechenanlagen 

 POIRIER, G. R. Ph.D. — Dept. of Biol., Univ. of Alabama, 1919 Seventh Ave. South, 



BIRMINGHAM, Ala. 35233, U.S.A. 

 a Ultrastructure of the seminiferous tubules including spermatocytogenesis, spermatocytes, 



spermiogenesis, Sertoli cell development, and interstitial tissue. Rana clamitans, R. pipiens 



(Anura) 

 b Localization of acrosomal enzymes during sperm maturation and fertilization at the ultra- 

 structural level. Mus musculus (Rodentia) 

 POLACK, M. — Arbeitsgr. Prof. G. H. M. Gottschewski am Max-Planck-Inst. fur Immunbiol., 



Stefan-Meier-Str. 8, 78 FREIBURG i.Br., W.Germany 

 a Differentiation of primordia analysed by the use of teratogenic substances. Cavia cobaya 



(Rodentia) 

 POLANI, P. E. M.D., Prof. — Paediat. Research Unit, Guy's Hosp. Med. School, LONDON 



S.E.I, England 

 a Meiosis. Mus spec, Acomys spec, Microtus spec. (Rodentia), Homo sapiens (Primates) 

 POLEZHAEV, L. V. Dr.biol.sci., Prof. — Inst, of Developm. Biol., Acad, of Sci. of the 



U.S.S.R., Vavilov St. 26, MOSCOW 117133, U.S.S.R. • 



a Regeneration of cranium bones. Mus domesticus, Rattus norvegicus, Oryctolagus cuniculus, 



Felis domestica, Canis familiaris (Mammalia) 

 b Regeneration of dental tissue. Canis familiaris (Carnivora) 

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



Canis familiaris (Mammalia) 

 d Restoration of regeneration capacity of limbs after x-irradiation. Ambystoma mexicanum 



(Uvodela) (with N. A. TEPLITZ and S. J. TUCHKOVA) 

 e Physiological regeneration of the brain. Felis domestica, Rattus norvegicus (Mammalia) 

 POLGE, C. Ph.D. — A.R.C. Unit of Reprod. Physiol. & Biochem., Anim. Res. Station, 307 



Huntingdon Rd.. CAMBRIDGE CB3 0JQ, England 

 a Factors influencing fertilization and early embryonic development (effects of age of 



gametes, administration of drugs, and hormones, in vitro treatments and transplanta- 

 tions). Sus scrofa (Artiodactyla) 

 POLTEVA, Mrs. D. G. Cand.biol.sci. — Dept. of Embryol., Leningrad State Univ., Mende- 



leevsky St. 5, LENINGRAD V-164, U.S.S.R. 

 a Morphogenesis during somatic embryogenesis. Hydra oligactis, Obelia geniculata, Coryne 



loveni (Hydrozoa) 

 PONTIER, J. Dr.es Sci. — Sect, de Biol. Gener. et Appl., Univ. de Lyon I, 43 Bd. du 11 



Novembre 1918, 69 VILLEURBANNE, France 

 a Analyse factorielle appliquee a letude de la morphogenese. Myzus persicae (Aphididae, 



Hemiptera) 

 POPOV, V. V. Dr.biol.sci., Prof. — Chair of Embryol., Biol. Fac, State Univ. of Moscow, 



Lenin Hills, MOSCOW B-234, U.S.S.R. 

 a Induction of cornea. Lymnaea stagnalis (Gastropoda) 



143 



