musculus (Rodentia) 

 WENSING. C. J. G. D.V.M.. Ph.D. — Veter. Anat. and Embryol. Inst.. 

 State Univ. of Utrecht. Bekkerstr. HI, 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. Univ. of Jerusalem, 



JERUSALEM, Israel 

 a. Development, especially vertebral column; tail regeneration. (Gekkoni- 



dae, Lacertilia) 

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



Cahf., U.S.A. 

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

 culus (Rodentia) 

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



germ and limb formation. (Aves) 

 WESTON, J. A. B.A.. Ph.D. — Dept. of Biol., Developm. Biol. Center, 



Western Reserve Univ., 2127 Cornell Road, CLEVELAND. Ohio 



44106. U.S.A. 

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



cus (Aves) 

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



(Aves) 



c. The action of morphogenetic agents on embryonic cell behavior i n 

 vivo and in vitro. Gallus domesticus (Aves) 



WETHERBEE, D. K. B.A.. M.A., Ph.D., Prof. — Dept. of Forestry and 

 Wildhfe Biol.. Univ. of Massachusetts. AMHERST. Mass.. U.S.A. 

 a. Ancestors and embryos; relationship between ontogeny and phylogeny. 



(Aves) 

 h. Inhibition of reproductivity. (Aves) 

 WEYGOLDT, P. Dr., Priv.Doz. — I. Zool. Inst, der Freien Univ. Berlin. 

 Konigin-Luise-Str. 1-3, BERLIN-Dahlem, Deutsche Bundesrepublik 

 a. Comparative embryology, with special reference to morphology and 

 evolution of the embryonic membrane and the pumping organ. Cheid- 

 dium muscorum. Lasiochernes pilosus (Cheliferinea) , Neobisium mus- 

 corum (Neobisiinea), Chthonius tetrachelafus (Chthoniinea, Pseudo- 

 scorpiones, Arachnoidea) 

 h. Reproduction (reproductive behavior, sperm transfer, form of sperma- 

 tophore, morphology of spermatozoon). Cheiridium muscorum, Lasio- 

 chernes pilosus (Cheliferinea), Neobisium muscorum (Neobisiinea), 

 Chthonius tetrachelafus (Chthoniinea. Pseudoscorpiones. Arachnoidea) 

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



Ind.. U.S.A. 

 WHITELEY. A. H. Ph.D.. 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. Univ. of Bristol. BRIS- 

 TOL 8, England 

 a. Development of the nervous system and behaviour pattern. Scylliorhi- 

 nus canicula, Petromyzon fluviatilis, Salmo spp. (Pisces) 



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