Wenger-Wil 



b. Histochemical study of the developing nervous system and its relation- 

 ship to developing behaviour patterns. DNA, RNA, acid and alkaline 

 phosphatase. Amby stoma maculatum (Urodela) (in collaboration with 

 P. G. ROOFE) 



WENIGER, J. P. Lie. es Sci. — Lab. de Zool. et d'Embryol. exper., Inst, de 

 Zool. et de Biol, gener., 12 Rue de l'Universite, STRASBOURG, France 

 a. Associations d'organes embryonnaires de meme espece et d'espece dif- 

 ferentes en culture in vitro; gonades, intestin. (Aves; Mammalia) 



WESSELLS, N. K. B.S. — Dept. of Zool, Gibbs Research Labs., Yale Univ., 

 NEW HAVEN, Conn., U.S.A. 

 a. Study of the differentiation of embryonic leg epidermis, both in situ 

 and i n v i t r o in a protein-free chemicallv defined medium. Gallus spec. 

 (Aves) 



WESTON, J. A. B.A. — Dept. of Zool., Gibbs Research Labs., Yale Univ., 

 NEW HAVEN, Conn., U.S.A. 

 a. Studies of the origin and migration of specific cell types in morphogene- 

 sis using tritiated-thymidine labeled cells. Gallus domesticus (Aves) 



WESTON, J. C. A.B., M.S., Ph.D. — Dept. of Anat., Ohio State Univ., 

 COLUMBUS 11, Ohio, U.S.A. 



WHITELEY, A. H. Dr., M.I.I.E., Prof. — Dept. of Zool., Univ. of Wash- 

 ington, SEATTLE 5, Wash., U.S.A. 



WHITING, H. P. M.A., Ph.D. — Dept. of Zool., The University, BRIS- 

 TOL 8, England 

 a. Development of the nervous system and behaviour pattern. Scylliorhinus 

 canicula, Petromyzon fluviatilis, Salmo spp. (Pisces) (in collaboration 

 with J. E. HARRIS) 



WHITTAKER, J. R. B.A. — Dept. of Zool., Josiah Willard Gibbs Research 

 Lab., Yale Univ., NEW HAVEN U, Conn., U.S.A. 



a. Interference studies with acetylcholinesterase inhibitors and other drugs 

 in early neural development and in cell determination. Gallus domesticus 

 (Aves) 



b. The developmental physiology of pteridine eye pigment formation. Fac- 

 tors related to pteridine dehydrogenase activity. Drosophila melanogas- 

 ter (Diptera) 



WIERTZ (HOESSELS), Mrs. E. L. M. J. Ph.D. — Veter. Anat. and 

 Embryol. Inst., Bekkerstr. 141, UTRECHT, Holland 



a. Photographical series of normal development. Gallus domesticus (Aves) 



b. Photographical series of organ development. Domestic animals (Mam- 

 malia) 



c. Histochemical determinations in embryos. Domestic animals (Mammalia) 

 WIGGLESWORTH, V. B. Dr., F.I.I.E., Prof. — Zool. Dept, Univ. of 



Cambridge, Downing St., CAMBRIDGE, England 

 WILDE, C. E., Jr. A.B., A.M., Ph.D., M.I. I.E. — Dept. of Pathol., School 

 of Dentistry, Univ. of Pennsylvania, 4001 Spruce St., PHILADEL- 

 PHIA 4, Pa., U.S.A. 



a. Organogenesis in vitro (limb bud, gills, cranial neural crest). Am- 

 bystoma maculatum (Urodela) 



b. Cellular differentiation (pigment cell; ectomesenchyme). 1. causal bio- 

 chemistry of cellular differentiation. 2. differentiation of cytoplasmic 

 fragments. Ambystoma maculatum (Urodela) 



132 



