PASCHMA, M. D.Sc. — Zaktad Zool. Ogolnej, Inst. Zool., Uniw. we 

 Wroclawiu, ul. Sienkiewicza 21, WROCLAW, Poland 

 a. Normal development and regeneration. (Enchytraeidae, Oligochaeta) 

 PASCUAL, Miss A. — Inst, de Biol, Univ. Nac. de Tucuman, Fac. de Bio- 

 quim., Quim. y Farmacia, Buenos Aires 289, TUCUMAN, Argentina. 

 a. The tricarboxylic acid cycle in developing eggs. Bufo arenamm (Anura) 

 PASQUINI, P. Ph.D., M.I.I.E.. Prof. — 1st. di Zool. dell'Univ., Viale Regina 

 Elena 324 (al Policlinico) , ROMA, Italia 



a. Growth and differentiation of regeneration blastema in vivo and i n 

 vitro. Planaria torva, Dugesia etrusca (Turbellaria) (in collaboration 

 with Miss A.P.BORRELLI) 



b. Growth and differentiation in regeneration. Planaria spec. (Turbellaria) 

 (in collaboration with H.MANELLI) 



PASSAPONTI, A. Dr.Med.6 Surgery, Prof. — 1st. di Anat. Umana Normale 

 deir Universita. Via Biblioteca 4. CATANIA, Italia 



a. The morphological aspect of embryo atrophy. Homo sapiens (Primates) 



b. The morphogenesis of anencephaly. Homo sapiens (Primates) 



c. The development of the inguinal canal. Homo sapiens (Primates) 



d. A new method of tissue grafts in the allantoic cavity. Gallus domesticus 

 (Aves) 



e. Structural changes of allantoic membrane epithelium submitted to the 

 action of different agents. Gallus domesticus (Aves) 



PASTEELS, J. J.M.D., M.I. I.E., Prof. — Lab. d'Anat. et d'Embryol., Fac. 



de Med. de I'Universite, 97 Rue aux Laines, BRUXELLES, Belgique 

 PATRICOLO, Miss E. Dr.Sc. — 1st. di Zool.. Via Archirafi 18. PALERMO. 



Italia 



a. Enzymatic inhibitors in development. (Ascidiae) 



b. Cellular aggregation. (Amphibia) 



PATTEN, B.M. Ph.D., M.I. I.E., Prof. (Emer.) — Dept. of Anat., Med. 



School, Univ. of Michigan, 4500 East Med. Bldg., ANN ARBOR. 



Mich., U.S.A. 

 a. Development of the ventricular myocardium in the embryo, with special 



reference to the intramural circulation. 

 PECHACKOVA, Miss J. — Inst, of Histol. and Embryol, Fac. of Med., 



Charles Univ., Karlovarska 48, PLZEN, Czechoslovakia 

 a. The development of the venous system. (Amniota) 

 PECK, D. B.S., M.S., Ph.D. — Dept. of Anat., Univ. of Kentucky Med. 



Center, LEXINGTON, Ky.. U.S.A. 

 PEDERSEN, K.J. Ph.D. — Inst, for almen Zool, Universitetsparken 3, 



COPENHAGEN 0, Denmark 

 PEHLEMANN, F.W. Dr. — Zool. Inst, der Univ.. Siesmayerstr. 70. 



FRANKFURT/Main, Deutsche Bundesrepublik 



a. Induktion der adenohypophyse. Bombina variegata. Rana temporaria 

 (Anura) 



b. Regulationsvermogen der Chordaspitze nach Extirpation im Gastrula — 

 bis Schwanzknospenstadium. Bombina variegata (Anura) 



PEHRSON. G.T. Dr.Phil., Prof. (Emer.) — Zool. Inst., Univ. of Stockholm, 

 Radmansgatan 70A, STOCKHOLM, Sweden 

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

 (Teleostei) 



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