a Determination and differentiation of cells in imaginal discs. Drosophila melanog aster, D. 



hydei, D. simulans, D. virilis (Diptera) 

 WILENS. Miss S. W. A.B. — Dept. of Biol., Yale Univ., NEW HAVEN, Conn. 06520. 



U.S.A. 

 a The movements of the entoderm in early stages studied with the use of vital dyes. 



(Urodela) 

 h Development of the gut and associated structures. Amblystoma punctatum (Urodela) 

 c Migration of ventral mesoderm of the neurula studied with vital dyes. Amblystoma 



punctatum (Urodela) 

 d Study of the symmetry of the heart. Amblystoma punctatum (Urodela) 

 WILLIAM, Miss N. B.Sc. — Dept. of Zool., Ain Shams Univ., Fac. of Sci., Abassia, CAIRO, 



Egypt 

 WILLIAMS, Miss G. H. Ph.D. — Dept. of Zool., Univ. of Toronto, TORONTO 5, Ont., 



Canada 

 a Patterns of enzyme development in small intestine. Mesocricetus aucatus (Rodenfia) 

 WILLIAMS, Mrs. M. LYMAN M.D. — Dept. of Pediat., School of Med., Univ. of Penn- 

 sylvania, PHILADELPHIA, Pa. 19104, U.S.A. 

 a Investigation of water uptake and extrusion by mitochondria of fetal animals. Rattus rattus 



(Rodentia) 

 h Peroxidation in fetal liver mitochondria; development of enzymes related to peroxidation. 



Rattus rattus (Rodentia) 

 WILLIAMS, N. Ph.D.. Prof. — Dept. of Zool.. Univ. of Iowa. IOWA CITY, Iowa 52240, 



U.S.A. 

 a Morphogenesis. Tetrahymena spec. (Holotricha, Ciliata) 



• WILLIER, B. H. Ph.D.. Sc.D.. Prof. (Emer.) — Dept. of Biol.. Johns Hopkins Univ.. 



Charles and 34th Sts., BALTIMORE, Md. 21218, U.S.A. 



a Histochemical study of the yolk sac membrane, a living transitory organ in which yolk 

 substances are metabolized and/or transported to the frowing embryo via the blood 

 Gallus spec. (Aves) 



b Ultrastructure of entodermal cells of yolk-sac membrane. Gallus spec. (Aves) 



WILLISON-BARFORD, Mrs. J. B.Sc. — Plant Physiol. Div., Dept. of Scient. and Industrial 

 Research, PALMERSTON NORTH. New Zealand 



WILSON, E. B.Sc. — Section of Exper. Neurol., Hosp. de Clinicas, MONTEVIDEO. 

 Uruguay 



a Regulation of cochlear input in the developing animal. Rattus norvegicus (Rodenfia) 



WILSON, I. B. Ph.D. — Dept. of Zool., Univ. Coll. of North Wales, BANGOR. Caernar- 

 vonshire, Wales, U.K 



a Investigations on the establishment of implantation and early pregnancy. Mus musculus 

 (Rodentia) 



WILSON, J. G. Ph.D., Prof. — Dept. of Anat., Coll. of Med., Univ. of Florida, GAINES- 

 VILLE. Fla., U.S.A. 



WILT. F. H. Ph.D., Prof. — Dept. of Zool.. Univ. of California. BERKELEY, Calif. 94720, 

 U.S.A. 



a Mechanism of thyroxin-stimulated visual pigment conversion during metamorphosis. 

 (Anura) 



h Mechanism of origin of hemoglobin-synthesizing machinery during development. Gallus 

 domesficus (Aves) 



c Activation of protein RNA synthesis in cleaving eggs. Strong ylocentrotus purpuratus 

 (Echinoidea) 



• WIMSATT. W. A. Ph.D., Prof . — Div. of Biol. Sci., Cornell Univ.. ITHACA. N.Y. 



14850, U.S.A. 

 a Comparative placentation. structural and functional. (Reptilia; Mammalia^ 

 b Ultrastructural analysis of sperm-uterus relationship, sperm, oocytes and fertilized ova. 



Myotis lucifugus (Microchiroptera) 

 WINGSTRAND, K. G. Dr.phil.. Prof. — Inst, of Comp. Anat.. Universitetsparken 15, CO- 

 PENHAGEN 0. Denmark 

 a Embryology. Armillifer spec. (Linguatulida) (in collaboration with A. N0RREVANG) 

 WINNICKI, A. D.Sc — Dept. of Physiol, of Fishes, Agric. Coll., OLSZTYN 5. Poland 

 a The role and properties of egg membranes. Salmo gairdneri, S. trutta, S. fario, Coregonus 



albula, Esox lucius (Teleostei) 

 WIRSfiN. C. M.D. — Dept. of Histol. Karolinska Inst.. Solnavagen 1, STOCKHOLM 60, 



Sweden 

 a Histogenesis of muscle tissue. 

 WISCHNITZER, S. Ph.D., Prof. — Dept. of Biol., Yeshiva Univ., 186th St. and Amsterdam 



Ave.. NEW YORK, N.Y. 10033, U.S.A. 

 a Electron microscopic study of oogenesis. Triturus viridescens (Urodela), Gallus domesficus 



(Aves), Mus albicans (Rodenfia), Homo sapiens (Primates) 



• WITSCHI, E. Ph.D., M.D.. Prof. — Bio-Med. Div., Population Council. Rockefeller Uni^'. 



York Ave & 66th St.. NEW YORK, N.Y. 10021, U.S.A. 



161 



