Wen-Wil 



WENSING, C. J. G. Vet.Surg. — Veter. Anat. and Embryol. Inst., State 

 Univ. of Utrecht, Bekkerstr. 141, UTRECHT, Netherlands 



a. Development of the conducting system in the heart. Sus scrofa (Artio- 

 dactyla) 



b. The conducting system in hearts with congenital malformations. Sus 

 scrofa (Artiodactyla) 



WERNER, Y. L. M.Sc, Ph.D. — Dept. of Zool., Hebrew Univ., JERUSA- 

 LEM, Israel 

 a. Development and regeneration of the vertebral column. (Geckonidae, 

 Lacertilia) 



WESSELLS, N. K. Dr. — Dept. of Biol. Sci., Stanford Univ., STANFORD, 

 Calif., U.S.A. 



a. Induction and cytodifferentiation in pancreatic exocrine cells. Mus mus~ 

 cuius (Rodentia) 



b. Epidermal-dermal interactions in relation to histogenesis and to feather 

 germ and limb formation. 



WESTON, J. A. B.A., Ph.D. — Dept. of Zool., Josiah Willard Gibbs Re- 

 search Lab., Yale Univ., NEW HAVEN 11, Conn., U.S.A. 

 temporarily: Dept. of Zool. and Comp. Anat., Univ. Coll. London, Gower 

 St., LONDON W.C. 1, England 



a. The early migration and differentiation of neural crest cells. Gallus do- 

 mesticus (Aves) 



b. The cell surface as an effector of cell specificity. Gallus domesticus 

 (Aves), Mus musculus (Rodentia) 



c. The action of morphogenetic agents on embryonic cells in vivo and 

 in vitro. Gallus domesticus (Aves) 



WETHERBEE, D. K. B.A., M.A., Ph.D., Prof. — Dept. of Poultry Sci., Univ. 

 of Massachusetts, AMHERST, Mass., U.S.A. 

 a. Ancestors and embryos. Relationship between ontogeny and phylogeny. 

 (Aves) 



WEYGOLDT, P. Dr. — I. Zool. Inst, der Freien Univ., Konigin-Luise-Str. 

 1-3, BERLIN-Dahlem 

 a. Vergleichend embryologische Untersuchungen. Cherries cimicoides, Pse- 

 laphochernes scorpioides, Chelifer cancroides (Cheliferinea, Arachnoi- 

 dea) 



WHITE, R. H. Ph.D. — Dept. of Biol. Sci., Purdue Univ., LA FAYETTE, 

 Ind., U.S.A. 

 a. Mechanism of compound eye determination; ultrastructure of the devel- 

 oping compound eye; relationship of growth hormones to the above. Aedes 

 aegypti (Culicidae, Diptera) 



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

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



a. Differentiation of a phosphate transport mechanism at fertilization. (Echi- 

 noidea) 



b. Characterization of DNA in interspecific hybrid embryos. (Echinoidea) 



c. Physiology of regeneration and nucleo-cytoplasmic interactions. Stentor 

 coeruleus (Ciliata) 



WHITFIELD (OLDFIELD), Mrs. F. E. B.Sc, Ph.D. — Dept. of Biol., Prin- 

 ceton Univ., Box 704, PRINCETON, N.J., U.S.A. 



176 



