SIMS. R. T. M.A.. M.B. — Anat. School, Univ. of Cambridge, Downing St., CAMBRIDGE 



CB2 3DY, England 

 a Biophysical investigations of factors affecting cellular differentiation in epidermis and 



hair follicles. (Mammalia) 

 SINCLAIR. J. G. Ph.D., Prof. (Emer.) — Dept. of Anat., Med. Branch, Univ. of Texas, 



GALVESTON, Tex. 77550, U.S.A. 

 a Development of vertebral vascular pattern in embryos. Stenella coeruleoalbus (Cetacea) 

 h Development of the pituitary gland and ear of embryos. Stenella coeruleoalbus (Cetacea) 

 SINGER, M. Ph.D., Prof. — Dept. of Anat., Developm. Biol. Center, School of Med., Case 



Western Reserve Univ., 2109 Adelbert Rd., CLEVELAND. Ohio 44106, U.S.A. • 



a Regeneration. (Amphibia) 

 SINGER, R. D.Sc, Prof. — Dept. of Anat., Div. of Biol. Sci., Univ.. of Chicago, 1025 



East 57th St., CHICAGO, 111. 60637, U.S.A. 

 a General embryology. Homo sapiens (Primates) 

 b General embryology. Hystrix africaeaustralis (Rodentia) 

 SINGH, I. Ph.D., Prof. — Dept. of Anat., Med. Coll., ROHTAK, India 

 a Mitotic rate in argyrophile and argentaffin cells of the embryonic gastrointestinal tract. 



Homo sapiens (Primates) 

 h Distribution of Paneth cells in the fetal gastrointestinal tract. Homo sapiens (Primates) 

 SINGH-ROY, K. K. Dr.phil. — Cell Research Unit., Dept. of Zool., Univ. of Calcutta, 35 



Ballygunje Circular Rd., CALCUTTA- 19, India 

 SINGH, R. P. Ph.D. — Dept. of Anat., Univ. of Western Ontario, LONDON, Ont., 



Canada 

 a Developmental pathology and teratogenesis. Homo sapiens (Primates) 

 h Histochemical studies of gonadal development. Homo sapiens (Pr imates) 

 SINHA, A. K. Ph.D. — Dept. of Zool.. Presidency Coll., CALCUTTA-12. W.Bengal, India 

 SIRAKAMI, K. I. D.Sc, Prof. — Dept. of Biol., Yamanashi Univ., K6FU, Japan • 



a Movement of isolated embryonic cells, studied by microcinematography. (Echinodermata; 



Pisces; Amphibia) 

 h Cytokinesis of cleavage, studied by time-lapse microcinematography. (Echinodermata; 



Pisces; Amphibia) 

 SIRLIN. J. L. Dr.nat.sci., Prof. — Dept. of Anat., Med. Coll., Cornell Univ., 1300 York 



Ave., NEW YORK, N.Y. 10021, U.S.A. ® 



SISCA, R. D.D.S., Ph.D. — Dept. of Histol. and Embryol., Coll. of Dental Surg., Univ. of 



Maryland, Lombard and Green St., BALTIMORE, Md. 21201, U.S.A. 

 SISKEN, J. — Depts. of Microbiol, and Biochem., Med. Center, Univ. of Kentucky, LEXING- 

 TON, Ky. 40506, U.S.A. 

 a Analysis of the physico-chemical properties of DNA in differentiating cells. Triturus 



viridescens (Urodela), Gallus domesticus (Aves), Mus musculus, Rattus rattus (Rodentia), 



Homo sapiens (Primates) (in collaboration with S. P. MODAK) 

 SJOLTE BYSKOV, Mrs. A. G. — Finsen Lab., Finsen Inst., 49 Strandboulevard. DK-2100 



COPENHAGEN, Denmark 

 a Electrophysiological studies on developing embryos. Xenopus laevis (Anura). Ambystoma 

 SJOSTRAND, F. S. M.D., Ph.D., Prof. — Dept. of Zool., Univ. of California, LOS 



ANGELES, Calif. 90024, U.S.A. 

 a Descriptive and biochemical molecular morphogenesis 

 b Morphogenesis of retinal receptor cells 



c Morphogenesis of mitochondria, Golgi apparatus and other cytoplasmic membranes 

 SKALKO R. G. Ph.D., Prof. — Dept. of Anat., Louisiana State Univ., 1542 Tulane Ave., 



NEW ORLEANS, La. 70112, U.S.A. 

 SKINNER, D. M. Ph.D., Prof. — Biol. Div., Oak Ridge Natl. Lab., P.O. Box Y, OAK 



RIDGE, Tenn. 37830, U.S.A. 

 a Metabolism of nucleic acids in the molt cycle. Gecarcinus lateralis (Decapoda, Crustacea) 

 b Studies on functions of satelite DNA's and macromolecular metabolism in regenerating 



tissues. Gecarcinus lateralis (Decapoda. Crustacea) (in collaboration with Miss M. S. 



KERR and D. E. GRAHAM) 

 SKOBLINA, M. N. — Inst, of Developm. Biol.. Acad, of Sci. of the U.S.S.R.. Vavilov St. 



26, MOSCOW B-133, U.S.S.R. 

 a Effect of gonadotropins and changes in the germinal vesicle and in the oocyte cytoplasm 



during maturation (Acipenseridae, Chondrostei; Amphibia) (in collaboration with Mrs. 



T. A. DETTLAFF) 

 SKREB. N. M.D., D.Sc, Prof. — Inst, of Biol., Univ. of Zagreb, Salata, ZAGREB, Yugo- 

 slavia * 

 a Investigation of early differentiation; transplantation, in vitro culture, autoradiography. 



Rattus norvegicus (Rodentia) (in collaboration with Mrs. B. LEVAK (5VAJGER), D. 



SOLTER and A. SVAJGER) 

 b Analysis of soluble proteins in organogenesis. Rattus norvegicus (Rodentia) (in collab- 

 oration with D. SERMAN) 



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