WENIGER. ].-P. Dr.es Sci. — Lab. de Zool. et d'Embryol. Expcr., Univ. de Strasbourg, 



12 rue dc ILIniversite, STRASBOURG. France 

 WENSING, C. J. G. D.V.M., Ph.D. — Vet. Anat. and Embryol. Inst.. State Univ. of 



Utrecht. Bekkerstr. HI, UTRECHT. Netherlands 

 a Mechanism of testicular descent (histology, biochemistry and tissue culture). (Mammalia) 

 WENT, D. — Dept. of Zool.. Swiss Federal Inst, of Technol.. Universitatstr. 2. 8006 ZU- 

 RICH, Switzerland 

 a In vivo and in vitro embryology of paedogenetic reproduction. Heteropeza pyg- 



maea (— Oligarces paradoxus) (Itonididae — Cecidomyiidae, Diptera) 

 WERNER, Y. L. Ph.D. — Dept. of Zool.. Hebrew Univ. of Jerusalem, JERUSALEM, 



Israel 

 a Normal development, embryonic and postnatal, of the vertebral column. (Gekkonoidea, 



Lacertilia) 

 b Tail regeneration, especially skeleton and skin; bifurcate tails. (Lacertilia) 

 c Temperature effects during embryogenesis on the number of vertebrae. Hemidactylus 



turcicus, Stenodactylus stenodactylus (Gekkonoidea, Lacertilia) 

 WERZ, G. Dr.phil. — Max-Planck-Inst. fur Zellbiol., Anton-Dohrn-Weg, Postfach 1009, 



D 294 WILHELMSHAVEN, W.Germany 

 a Nucleo-cytoplasmic interactions, 

 b Mechanism of cell wall differentiation. 

 c Genesis of endoplasmic membrane systems, 

 d Morphogenesis of cell constituents. 



e Conformational changes of polypeptides and their relationship to morphogenesis. 

 WESSELLS N. K. Dr. — Dept. of Biol. Sci., Stanford Univ., STANFORD, Calif. 94305. 



U.S.A. ' • 



a Induction and cytodifferentiation in pancreatic exocrine cells. Mus miisculus (Rodentia) 

 h Epidermal-dermal interaction in relation to histogenesis and to feather germ and limb 



formation. (Aves) 

 WESTERGAARD, E. M.D. — Dept. of Anat., Royal Dental Coll.. AARHUS, Denmark 

 a Cerebral ventricles of the fetus (studies of the ventricle "models" obtained after injection 



of Cu-phtalocyanin into the ventricle system followed by clearing). Homo sapiens (Pri- 

 mates) 

 WESTERGAARD, O. Ph.D. — Biol. Inst, of the Carlsberg Found., Tagensvej 16, 2200 



COPENHAGEN N.. Denmark 

 a DNA-polymerase activity in correlation to cell cycle and to circumstances where DNA 



is damaged (UV. X-ray or treatment with chemicals). Tetrahymena pyriformis (Ciliata) 

 WESTERMAN. R. A. Ph.D. — Dept. of Physiol., Monash Univ., CLAYTON, Vict. 3168. 



Australia 

 a Histological and electrophysiological aspects of regenerating nerve fibres, particularly in 



the olfactory system. Carassius carassius (Teleostei) 

 WESTERNHAGEN, H. von. — Inst, fiir Hydrobiol. und Fischereiwiss., Univ. Hamburg. 



Olbersweg 24, 2 HAMBURG-Altona 1, V/.Germany 

 a Effect of temperature and salinity on developing eggs. Belone belone. Gadus morrhua, 



Pleuronectes flesus, P. platessa (Teleostei) 

 WESTON J. A. Ph.D. — Dept. of Biol., Case Western Reserve Univ., 2080 Adelbert Rd., 



CLEVELAND, Ohio 44106, U.S.A. 

 a The migration and differentiation of neural crest cells. Gallus domesticus (Aves) 

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

 c The action of morphogenetic agents on embryonic cell behavior in vivo and i n 



vitro. Gallus domesticus (Aves) 

 WETHERBEE, D. K. Ph.D.. Prof. — Dept. of Forestry and Wildlife Biol.. Univ. of 



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

 WEYGOLDT, P. Dr. — Biol. Inst. I (Zool.) der Univ., Katharinenstr. 20, 78 FREIBURG. 



W.Germany 

 a General and comparative embryology. Pseudoscorpionidea and other Arachnida 

 h Evolution of embryonic pumping organ, embryonic nutrition and embryonic envelope. 



Pseudoscorpionidea and other Arachnida 

 c Embryology. Tarantula marginemaculata (Amblypygidae, Araneida, Arachnida) 

 d Embryology. Euphilomedes producta (Ostracoda, Crustacea) 

 WHALEY. W. G. Ph.D., Prof. — Cell Research Inst., B.L. 220, The Univ. of Texas at 



Austin, AUSTIN, Tex. 78712, U.S.A. 

 a The progessive development and interactions of cellular organelles with differentiation of 



tissues, together with the modification of this development by various experimental proce- 

 dures. Zea mays (Gramineae) 

 WHARTON L R. Jr. M.D. — Dept. of Gynecol, and Obstet.. School of Med.. Johns 



Hopkins Hosp.. 'BALTIMORE, Md. 21205. U.S.A. 

 a The effect of norethindrone on the pregnant female and fetus. Macaca mulatta (Pr imate s) 

 WHITELEY. A. H. Ph.D.. Prof. — Dept. of Zool.. Univ. of Washington, SEATTLE. 



Wash. 98105. U.S.A. 

 WHITING, H. P. Ph.D. — Dept. of Zool.. Univ. of Bristol. BRISTOL BS8 lUG. England 



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