c. Morphology and causal biochemistry of striated muscle differentiation. 

 Ambystoma maculatum (Urodela) 



d. Continuous flow curtain electrophoresis of molecular constituents of 

 specific embryonic anlagen and cell types. Fraction recovery and tissue 

 culture of embryonic cells in the presence of selected fractions. Ambysto- 

 ma maculatum (Urodela) 



e. Differentiation of cytoplasmic fragments. Ambystoma maculatum (Uro- 

 dela) 



f. Cytochimeras in tissue culture from disaggregated cells of embryos of 

 different classes. Gallus spec. (Aves), Mus spec. (Rodentia) 



WILENS. Miss S. W. A.B. — Osborn Zool. Lab., Yale Univ.. NEW HA- 

 VEN 11, Conn., U.S.A. 



a. The movements of the endoderm in early stages studied with the use of 

 vital dyes. (Urodela) 



b. Development of the gut and associated structures. Ambystoma puncta- 

 turn (Urodela) 



WILLIAMS. J. B.Sc. M.B., Ch.B. — Dept. of Biochemistry, Univ. of Cam- 

 bridge, Tennis Court Road, CAMBRIDGE, England 

 a. Chemistry of yolk proteins. Gallus spec. (Aves) 



WILLIAMS. R. G. A.B., M.S., M.D., Prof. — Dept. of Anat., School of 

 Med., Univ. of Pennsylvania, PHILADELPHIA 4, Pa.. U.S.A. 



WILLIAMS, S. C. B.S., Ph.D. — Dept. of Anat., School of Med., Univ. of 

 Pennsylvania, PHILADELPHIA 4, Pa., U.S.A. 



WILLIER. B. H. B.S., Ph.D., Sc.D., F.I. I.E., Prof. — Dept. of Biol., The 

 Johns Hopkins Univ., Charles and 34th Sts., BALTIMORE 18, Md., 

 U.S.A. 



a. Re-examination of the interactions of cortical and chromaffin cells m the 

 development of the adrenal gland and its secretory activity. (Aves) 



b. Analysis of the nature of mechanisms operating in time and space in the 

 development of rhythmic pigmentation design. (Aves) 



c. Formulation of principles and concepts appertaining to the development 

 of hormonal milieu as a means of dynamic integration of the growing 

 embryo. 



d. Histochemical study of the yolk sac membrane, a living transitory organ 

 in which yolk substances are metabolized and/or transported to the 

 growing embryo via the blood circulation. Gallus spec. (Aves) 



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

 Florida, GAINESVILLE, Florida, U.S.A. 

 a. Teratology. 

 WILSON, J. W. Ph.D., Prof. — Arnold Biol. Lab., Brown Univ., PROVI- 

 DENCE 12, R.I., U.S.A. 

 a. A study of mitotic activity and other cytological phenomena in liver 

 regeneration. (Vertebrata) 

 WILT F. H. A.B. — Dept. of Embryol., Carnegie Inst, of Washington, 

 Wolfe and Madison Sts., BALTIMORE 5, Md., U.S.U. 



a. An analysis of the mechanism of conversion of porphyropsin to rhodopsin 

 in the retina during metamorphosis, with the use of biochemical methods. 

 Rana catesbiana (Anura) 



b. Cell and organ specific effects of structural analogues of pyridine 

 nucleotide coenzymes and their precursors, tested in vitro. Gallus 

 gallus (Aves) 



133 



