e Ontogenese des Zentralnervensystems. Balaenoptera physalus, B. acutorostrata, Megaptera 



nodosa, Delphinus delphis, Tursiops truncatus. Delphinapterus leucas fCecatea) 

 f Ontogenesis (especially nervous system). Globicephala melaena (Odontoceti, Cetacea) 

 PINAMONTI, S. Dr.biol.sci. — 1st. di Istol. ed Embriol., Fac. di Sci., Univ. di Perugia. 



PERUGIA, Italia 

 PINEAU, H. — Lab. d'Anat., Fac. de Med., 45 Rue des Sts.Peres, PARIS Vie. France 

 a Croissance prenatale globale. Homo sapiens (Primates) 

 PINET, J. M. Dr.3eCycle — Inst. Natl. Agronomique, Lab. de Zool.. 16 rue Claude Bernard, 



75-PARIS Ve, France 

 a Studies of the development of the maxillary stylet (fine structure, histochemistry of the 



styligenic organ). Rhodnius prolixus (Reduviidae, Hetecopfera) 

 h Potentiality of the cells of the styligenic organ according to their sites. Rhodnius prolixus 



(Reduviidae, Heteroptera) 

 PINOT, Miss M. Lic.es Sci. — Inst. d'Embryol. et Teratol. exper. du C.N.R.S., 49 bis Av. 



de la Belle Gabrielle, 94-NOGENT-sur-MARNE, France 



— Lab. d'Embryol. exper. du Coll. de France, 1 1 Place M. Berthelot, PARIS Ve, France 

 a Etude de la croissance et de la dif ferenciation du bourgeon de membre in vitro. 



Gallus gallus (Aves) 

 b Rapports mesenchyme axial — mesenchyme lateral dans I'organogenese du membre. Gallus 



gallus (Aves) 

 c Origine des cotes et des muscles intervertebraux. Gallus gallus (Aves) 

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



Oostersingel 69, GRONINGEN, Netherlands 

 a Topographical relationships in the intestines during ontogenesis. Mus musculus albinus 



(Rodenfia) 

 h Development of the glomus chorioideum. Homo sapiens (Primates) 



PLESNER, P. Cand.med. — Biol. Inst, of the Carlsberg Found., 16 Tagensvej, COPEN- 

 HAGEN N, Denmark 

 PLETICHA, P. — Inst, of Histol. and Embryol., Fac. of Med., Charles Univ., Karlovarska 48. 



PLZEN, Czechoslovakia 

 a Ontogeny of the air sacs. Larus ridibundus, Fulica atra, Turdus merula, Ciconia alba. 



Ardea cinerea (Aves) 

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



Lindenthal, Deutsche Bundesrepublik 

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



Regulation des Zellteilungswachstums. Ephestia kiihniella (Lepidoptera), Periplaneta 



americana (Orthoptera) 

 b Modelldarstellung entwicklungsphysiologischer Systeme mit Hilfe von programmgesteuer- 



ten Rechenanlagen. 

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



U.S.S.R.. Vavilov St. 26, MOSCOW V-133. 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 domestics, 



Canis familiaris (Mammalia) 

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



(Urodela) (in collaboration with Miss N. A. TEPLITZ and Mrs. 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, f^ Biochem.. 307 Huntingdon Rd.. 



CAMBRIDGE. 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. — Dept. of Embryol., Leningrad Univ.. Mendeleevsky St. 5. LENIN- 

 GRAD B-164. U.S.S.R. 

 a Somatic embryogenesis and regeneration. Metridium senile fimbriatum, Anthopleura spec. 



(Zoantharia, Actinozoa) 

 PONTIER, J. Lic.es Sci. — Section de Biol, generale et appliquee, Fac. des Sci., Univ. de 



Lyon, 43, Bd. du 11 Novembre 1918. 69-VILLEURBANNE. France 

 a Analyse factorielle appliquee a I'etude de la morphogenese. Myzus persicae (Aphididae, 



Rhynchota) 

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



V-234, U.S.A. 

 POPP, R. A. Ph.D. — Biol. Div., Oak Ridge Natl. Lab., P.O.Box Y, OAK RIDGE, Tenn. 



37831, U.S.A. 

 a Ontogeny of variant forms of esterases in tissues; qualitative and quantitative charac- 

 teristics of allelic forms of esterases studied by starch and/or acrylamide gel electrophoresis. 



Mus musculus (Rodentia) 



120 



