Pincus-Ram 



a. Physiology of reproduction. (Mammalia) 



b. Early development of eggs. (Mammalia) 



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



PARIS Vie, France 

 a. Embryologie et croissance du squelette des membres. Homo sapiens 



(Primates) (en collaboration avec G. H. G. OLIVIER) 

 PLESNER, P. Dr phil. — Biol. Inst, of the Carlsberg Foundation, 16. 



Tagensvej, COPENHAGEN N, Denmark 

 a. Studies on the biochemistry and physiology of synchronized cell systems. 



Tetrahqmena pijriformis (Holotdcha, Ciliata) (in collaboration with K. 



HAMBURGER and E. ZEUTHEN) 

 PLETZEN. R. van D.Sc. — Dept of Zool.. Univ. of O.F.S., BLOEMFON- 



TEIN, South Africa 



(no embryological work in progress) 

 POHLEY, H.-J. Dr — Inst, fiir Entwicklungsphysiologie, Univ. zu Koln, 



Gyrhofstr. 17, KOLN-LINDENTHAL. Deutschland 

 a. Entwicklung der Fliigel. Regeneration und Superregeneration der Flii- 



gelanlagen. Einwirkung der regenerierenden Anlagen auf den Zeitpunkt 



der Puppenhautung. Ephestia kiihniella Z. (Lepidoptera) 

 h. Einfluss der Antennenlange auf das Wachstum der regenerierenden An- 



tennen. Einfluss der Antennenlange auf die Dauer der Larvenstadien. 



Pcriplaneta americana L. (Orthoptera) 

 POLEZHAYEV. L. V. Dr Sci.Biol.. F.I.I.E.. Prof. — Inst, of Animal Mor- 



phol.. of the Acad, of Sci. of the U.S.S.R.. B. Kalushskaja 33, MOS- 

 COW V-71, U.S.S.R. 

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



Oryctolagus cuniculus, Felis domestica, Canis [amiliaris (Mammalia) 

 h. Regenerative capacity and immunity in ontogenesis. Rana temporaria, 



Bombina bombina (Anura) 



c. Regeneration of brain. Felis domestica, Canis [amiliaris, Rattus norvegi- 

 cus (Mammalia) 



PORTMANN. A. DrPhil.. Prof. — Zool. Anstalt der Univ., Rheinsprung 

 9, BASEL. Schweiz 



a. Embryology and postembryonic development. (Araneida) 



b. Embryology of the forebrain (including postembryonic stages). (Aves) 



c. Development of skin pattern. (Reptilia) 



POULSON, D. F. B.S., Ph.D.. Prof. — Osborn Zool. Lab., Yale Univ.. 

 NEW HAVEN 11. Conn.. U.S.A. 



a. Mid-gut: genesis and differentiation. Drosophila 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 

 melanogaster (Diptera) 



PRETO PARVIS, Mrs V. Dott.Med.. Prof. — Cattedra di Istol. ed Em- 

 briol. gener., Fac. di Med. e Chir. dell'Univ. di Milano. Via Mangiagalli 

 31, MILANO. Italia 



a. Nucleic acids and fatty substances in nervous cells during development. 

 Rattus norvegicus. Felis domestica, Cavia cobaya (Mammalia) 



h. Morphological and histochemical studies of histogenesis of mucous and 



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