Penners 70 Pia 



d. Entwicklung des Eies unter Beeinflussung durch Colchicin und Ront- 



genstrahlen. Cyclops viridis (Copepoda) 

 PENTZ. Miss K. M.Sc. — Zool. Inst., Univ. of Stellenbosch, STELLEN- 



BOSCH. S. Africa, 

 a. Ontogenesis of the skull. Hynobius [uscus (Urodela) 

 PEPERNIK. Mrs V. — Dept of Zool., State Univ. of Iowa, IOWA CITY. 



Iowa, U.S.A. 

 a. The development of the optic tectum following repeated crushing of the 



optic nerve. Xenopus (Anura) (in collaboration with J. J. KOLLROS) 

 PERLMANN, H. P. — Wenner-Grens Inst, for experimental Biology, Norr- 



tullsgatan 16, STOCKHOLM Va.. Sweden. 

 a. Serological and chemical studies on the proteins of developing eggs. 



Paracentrotus lividus and Arbacia lixula ( Echinoidea) 

 PERRI, T. Dott., Prof. — 1st. di Anat. comp. dell'Univ., Fac. di Sci., Via 



Borelh 50, ROMA, ItaHa. 



(no data received on Nov. 1^', 1952) 

 PERRY, J. H. Ph.D., Prof. — Dept. of Anat., Coll. of Med., Baylor Univ., 



1200 M.D. Anderson Blvd, Texas Med. Center, HOUSTON 5, Tex.. 



U.S.A. 



(no data received over some years) 

 PESONEN, S. K. Drfil. — Womens Clinic of Helsinki, HELSINKI. 



Finland. 



a. On the effect of some proteins on the further development of chemically 

 activated egg-cells. Mas norvegicus albinus (Rodentia) 



b. Fertilization. Mus norvegicus albinus (Rodentia) 



PETER, K. F.I.I.E., Dr. Prof. (Emer.) — BIRKENSTEIN, Post FISCH- 



BACHAU, Oberbayern, Deutschland. 



(no data received) 

 PETZOLD, R. — Dept of Zool.. Univ. of Chicago. CHICAGO 37. 111.. 



U.S.A. 



(no data received on Nov. 1**, 1952) 

 PFLEGER, Miss D. Lie. es Sc. — Lab. de Zool. de la Fac. des Sci et Lab. 



d'Embryol. et Teratol. exper. du C.N.R.S., Inst, de Zool. et de Biol. 



gen., 12 Rue de I'Universite, STRASBOURG, France, 

 a. Role des hormones dans la differenciation sexuelle. Etudes biochimiques 



sur la regression des canaux de Miiller. Gallus (Aves) 

 PFLUGFELDER, O. Dr rer.nat.. Prof. — Zool. Inst, der Landwirtschaftl. 



Hochschule, STUTTGART-HOHENHEIM (Ha), Deutschland. 



a. Tumorentstehung nach Storung des Hormonhaushalts. (Evertebrata 

 und Vertebrata) 



b. Einfluss der Pinealektomie auf die Postembryonalentwicklung. Leb^stes 

 reticulatus Peters (Cyprinodontidae, Teleostei) 



c. Schwanzmissbildungen. Anas, Gallus (Aves) 



PHILLIPS, Miss R. J. S. B.Sc. — Med. Res. Council, Inst, of Anim. 



Genet., King's Buildings, West Mains Rd, EDINBURGH 9, Scotland 



(U.K.) 

 a. Developmental study of a new fifth-toe Polydactyly and urogenital 



abnormalities in a stock of mice. Mus musculus (Rodentia) 

 PIATT. J. A.B., M.A., Ph.D., Assoc. Prof. — Dept of Anat., School of 



Med.. Univ. of Pennsylvania. PHILADELPHIA 4. Pa, U.S.A. 



(no data received over some years) 



