Pas 69 Pen 



PASCHMA, M. M.Ph. — Zaktad Zool. Ogolnej. Inst. Zool. Uniw. we 

 Wroctawiu, ul. Sienkiewicza 21, WROCLAW, Polska (Poland), 

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



PASQUINI, P. Ph.D., Prof. — Inst, di Anat. Comp., Via Belmeloro 8, 

 BOLOGNA (103), Italia. 



a. Effects of antimitotics on early development and on lens-regerenation. 

 Rana esculenta, Triton and Ambystoma (Amphibia) (in collaboration 

 with Miss I. DE CESARE) 



b. Effects of antimitotics on the regeneration of peripheral nerves. (Urodela 

 and Anura) (in collaboration with S. LEGHISSA) 



c. Effects of low temperature on early development. (Amphibia) (in colla- 

 boration with L. RAUNICH) 



PASSALACQUA, Miss A. Dr— 1st. di Zool, Via Archirafi 18, PALER- 

 MO, Italia. 



a. Combined xenoplastic explantations of gastrula fragments. (Amphibia) 



b. Development of eggs treated with SCN salts. (Ascidiae, Urochordata) 

 PASTEELS, J. J. F.I. I.E., M.D., Agr. Ens. sup.. Prof. — Lab. d'Anat. et 



d'Embryol., Fac. de Med. de I'Univ., 97 Rue aux Laines, BRUXELLES. 

 Bislgique. 



a. General survey of development. Chrysemis, Pseudemys, Chelone (Che- 

 Ionia), Chamaeleo, Mabuya (Sauria) 



b. Cytochemical observations on the first developmental stages. (Amphibia) 

 (in collaboration with J. BRACHET) 



c. Photometric quantitative determinations of desoxyribonucleic acid 

 (D.N. A.) in resting cells, mitosis, spermatogenesis and development, 

 (in collaboration with L. LISON) 



d. The early development from late neurula stage to an advanced tailbud 

 stage (esp. morphological data for experimental work). Xenopus laevis 

 (Anura) (Normal Table) 



PATANE', L. Dr, Aiuto — 1st. di Zool. e Anat. comp.. Via Androne 25, 

 CATANIA. Italia. (no data received on Nov. l''*, 1952) 



PATTEN, B. M. Ph.D., Prof. — Dept of Anat.. Med. School. Univ. of 

 Michigan. 2500 East Med. Bldg, ANN ARBOR. Mich.. U.S.A. 

 (no data received over some years) 

 PEASE, D. C. Dr. Prof. — Dept. of Zool., Coll. of Phys. and Surg.. Co- 

 lumbia Univ., NEW YORK City, N.Y., U.S.A. (no data received) 

 PEHRSON, G. T. Dr Phil, Prof. — Zootom. Inst., Univ. of Stockholm, 

 116 Drottninggatan, STOCKHOLM, Sweden. 

 a. Development and morphology of the skull and of the lateralis system. 



(Osteoglossidae and Characinidae, Teleostei) 

 h. Ontogeny of the skull. Polypterus (Crossopterygii) 

 t PENNERS, A. F.I. I.E., Prof. — Zool. Inst, der Univ., Naturw. Fak., Ront- 

 genring 10, WORZBURG, Deutschland. 



(the undermentioned investigations are carried on at the Institute by his 

 collaborators) 

 a. Regeneration auf verschiedenen Altersstadien. Tubifex tivulorum (Cli- 



tella, Oligochaeta) 

 h. Cytochemische Untersuchungen der Oogenese und Spermatogenese. 



Tubifex nvulorum (Clitella, Oligochaeta) 

 c. Beeinflussung der Regeneration durch Naphtachinon und Phenanthren- 

 chinon. Tubifex nvulorum (Clitella, Oligochaeta) 



