O'Steen-Per 



a. Regeneration of the intestine after transection of gut in one to several 

 sites; reversal of segments; looping of segments. Diemictylus viridescens 

 virid. (Urodela) 



b. Regeneration of intestine in larval forms after simple single transections 

 of loops of the coiled intestine, and re-establishment of functional intestine 

 after removal of large percentage of digestive tract; effects on metamor- 

 phosis. Rana clamitans (Anura) 



OSTROWSKI, K. Dr.med. — Zaklad Histol. i Embriol, Ak. Med., ul. Cha- 



lubinskiego 5, WARSZAWA, Poland 

 a. The mechanism of osteogenesis induced by transplants of urinary bladder 



mucosa (tissue differentiation and experimental metaplasia). 

 OVERTON, Mrs. J. H. A.B., Ph.D. — Dept. of Zool., Univ. of Chicago, 



CHICAGO 37, 111., U.S.A. 



a. Morphogenesis of liver. Amby stoma spec. (Urodela), Gallus domesticus 

 (Aves) 



b. Effects of colchicine on the early blastoderm. Gallus domesticus (Aves) 

 PADYKULA, Miss H. A. B.S., M.A., Ph.D. — Dept. of Anat., Harvard 



Med. School, 24 Shattuck St., BOSTON 15, Mass., U.S.A. 

 PAI, S. Dr.rer.nat., F.I. I.E. — Lab. of Developm. Physiol., Inst, of Exper. 



Biol., Acad. Sinica, 320 Yo Yang Road, SHANGHAI, China 

 PANTELOURIS, E. M. B.Sc, Ph.D. — Zool. Dept., Queen's Univ., BEL- 

 FAST, N. Ireland 

 a. Effects of radiation on foetuses, and means of alleviating them. Mus 



musculus (Rodentia) 

 PAPACONSTANTINOU, J. Ph.D. — Dept. of Embryol., Carnegie Inst. 



of Washington, Wolfe and Madison Sts., BALTIMORE 5, Md., U.S.A. 

 a. Biochemical and immunochemical studies of lens development. Gallus 



gallus (Aves) 

 PAPI. F. Prof. — 1st. di Zool. e Anat. comp. dell'Univ., Via A. Volta 4, 



PISA, Italia 

 a. Reproduction and cytology. (Rhabdocoela, Turbellaria) 

 PARRANT, M. Dr. en Med. — Lab. d'Embryol., Fac. de MecL, 45 Rue des 



Sts. Peres, PARIS Vie, France 

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



Wroclawiu, ul. Sienkiewicza 21, WROCLAW, Poland 

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

 PASQUINI, P. Ph.D., F.I. I.E., Prof. — 1st. di Zool. della Universita, Viale 



Regina Elena 324 (al Policlinico), ROMA, Italia 



a. Enzymes and embryonic development. (Amphibia) (in collaboration with 

 D. PETRUCCI) 



b. Growth and differentiation in regeneration. Hydra spec. (Hydroidea) , 

 Planaria spec. (Turbellaria) (in collaboration with D. PETRLICCI) 



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



de Med. de l'Univ., 97 Rue aux Laines, BRUXELLES, Belgique 

 PATERSON, Miss M. C. B.A., M.S., Ph.D. — Dept. of Zool., Vassar Coll., 



POUGHKEEPSIE, N.Y., U.S.A. 

 a. Regeneration studies with particular emphasis on the role of the nervous 



system and neurosecretory cells. Clymenella torquata (Polychaeta) 

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



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



96 



