Piatt 74 Quenu 



b. Nerve pattern in heterotopically transplanted embryonic limbs. Ambys- 

 toma punctatum and tigrinum (Urodela) 

 PIEPHO H Dr Phil Prof. — Zool. Inst, der Univ. Gottingen., Mathem.- 

 Naturw. Fak.. Bahnhofstr. 28. GOTTINGEN, Deutschland 

 a. Metamorphose. Galleria mellonella (Lcpidoptera) 

 PIERAGNOLI. U. — 1st. di Zool. e Anat. Comp. dell'llniv.. Via A. Volta 

 4. PISA. Italia 

 a. Gametogenesis and cytology. Dugesia lugubhs (Turbellaria) 

 PINCUS G Dr. Prof. — Worcester Foundation for Exper. Biology. 222 

 Maple Ave. SHREWSBURY, Mass.. U.S.A. 

 (no data received on Nov. I'''. 1953) 

 PISANO. A. Dr Biol.Sc. — Inst, de Zool.. Univ. Nac. de Tucuman. Miguel 

 Lillo 205. TUCUMAN. Argentina, S. America 

 (no data received over some years) 

 PLETZEN. R. van D.Sc. (Stellenbosch) — Dept of Zool.. Univ. of O.F.S.. 

 BLOEMFONTEIN. South Africa 

 a. Ontogenesis of skeleton and muscles of shoulder girdle and forelimbs. 

 Xenopus lacvis (Anura) (Normal Table) 

 POLLICITA. Miss M. Dr — 1st. di Zool.. Via Archirafi 18, PALERMO, 

 a. Xenoplastic parabiosis. (Amphibia) Italia 



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

 9. BASEL. Schweiz (no embryological work in progress) 



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

 HAVEN II, Conn., U.S.A. 

 a. Mid-gut: genesis and differentiation. Drosophila melanog aster (Diptera) 

 h. Chromosomal control of differentiation. Drosophila melanog aster 

 (Diptera) 

 PRETO PARVIS, Mrs V. Dott.Med., Prof. — 1st. di Anat. umana norm. 

 deirUniv. di Milano, Via MangiagaUi 31, MILANO, Italia 



a. Modifications of contents in nucleinic acids and of the nuclear apparatus 

 in nervous cells during development in relation with their degree of 

 growth and functional matrrity (Methods: Piekarsky-Robinow; Feulgen: 

 Golgi: Cajal). (Mammalia) 



b. Morphological and histochemical studies of histogenesis of chondroid 

 and mucous tissues. (Aves and Mammalia) 



c. Histochemical study of histogenesis of cartilage. Mus rattus (Rodentia) 

 (in collaboration with G. RONCORONI) 



PRIESCHING. A. M.D. — Anat. Inst, der Univ. Wien, Wahringerstr. 13. 

 WIEN IX. Oesterreich 



a. Development of cysto-colic fold. Omentum colicum Halleri and other 

 derivatives of the right part of the Omentum mains. Homo sapiens (Pri- 

 mates) 



b. Involution of omphalomesenteric artery. Homo sapiens (Primates) 

 PROP. N. B.Sc. — Anat.-Embryol. Lab. der Rijks Univ., Oostersingel 69, 



GRONINGEN, Holland 



a. Development of the egg by means of vital staining. Ambystoma (Uro- 

 dela) 

 QUfiNU, L. DrenMed. — Lab. des Travaux Anat., Fac. Med. Nouvelle. 

 43 Rue des St Peres. PARIS Vie. France 



a. Developpement de I'appareil respiratoire. Homo (Primates) 



