Osa-Per 



OSANAI, M. M.A., D.Sc. — Biol. Lab., Keio Univ., YOKOHAMA, 

 Hiyoshi, Japan 



a. Colour changes of larvae in diapause. (Lepidoptera) 



b. Studies on the pterins and their precursors during postembryonal deve- 

 lopment. (Pieridae, Lepidoptera) 



O'STEEN, W. K. B.A., M.S., Ph.D. — Dept. of Anat, Med. Branch, Univ. 

 of Texas, GALVESTON, Tex., U.S.A. 



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

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

 vivid. (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 meta- 

 morphosis. Rana clamitans (Anura) 



c. Radioautographic studies of regeneration (cell renewal) in forelimb and 

 intestine. Diemictylus viridescens (Urodela) 



OVERTON, Mrs. J. H. Ph.D., M.I.I.E. — Dept. of Zool., Biol. Sci. Div., 

 Univ. of Chicago, CHICAGO, III, U.S.A. 



a. Cell adhesion in early development. Gallus domesticus (Aves) 



b. Regeneration in the eye. Xenopus laevis (Anura) (in collaboration with 

 G. FREEMAN) 



OWERS, N. — Dept. of Anat., Bardeen Med. Labs., Univ. of Wisconsin, 

 MADISON 6, Wis., U.S.A. 



a. Placentation. (Soricidae; Tupaiidae) 



b. Development of fetal membranes. (Soricidae, Insectivora) (in collabora- 

 tion with H. W. MOSSMAN) 



c. Tissue and organ culture of fetal membranes. Sus scrofa ( Artiodactyla) 

 OZEKI, K. O. Dr. Sci. — Biol. Inst., Coll. of Gener. Education, Univ. of 



Tokyo, Komaba, Meguro-ku, TOKYO, Japan 

 a. Hormonal regulation of metamorphosis. Anisolabis maritima (Der- 

 maptera) 



PACKER, A. D. M.Sc, M.D. — Dept. of Anat. and Histol., Univ. of Ade- 

 laide, ADELAIDE, S. Australia, Australia 

 a. Experimental developmental morphology. (Rodentia) 



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

 Med. School, 25 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 



PANITZ, R. Dipl.-agr. — Inst. f. Kulturpflanzenforsch. der Deutschen 

 Akad. der Wiss. zu Berlin, GATERSLEBEN, Kreis Aschersleben, Deut- 

 sche Demokratische Republik 

 a. Investigations about the effect of ecdysone (hormone of the prothoracic 

 gland) on the physiological activity of specific gene-loci in the salivary 

 gland chromosomes. Acricotopus lucidus (Chironomidae, Diptera) 



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

 BELFAST, N. Ireland 

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

 musculus (Rodentia) 



PAPACONSTANTINOU, J. B.A., M.A., Ph.D. — Dept. of Microbiol., 

 Johns Hopkins Univ. School of Med., 725 North Wolfe St., BALTI- 

 MORE 5, Md., U.S.A. 



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