a Electron microscopic study of the formation of myelin sheaths and development of neuro- 

 glial cells in the central nervous system. Rattus domesticus (Rodentia) 

 b Electron microscopic study of spinal cord development. Rattiis domesticus (Rodentia) 

 VENEZIANO, P. P. Ph.D. — Dept. of Biol., Wilbur Wright Coll., 3400 N.Austin Ave., 



CHICAGO, 111. 60634, U.S.A. 

 a The effect of artificial sweetners on growth and development. Gallus domesticus (Aves) 

 b The effect of antipituitary sera on development. Gallus domesticus (Aves) 

 c The effect of low intensity magnetic fields on the developing nervous system of 24, 36, 



and 48 hour blastoderms. Gallus domesticus (Aves) 

 VENZKE, W. G. Ph.D., Prof. — Dept. of Vet. Anat., Coll. of Vet. Med., Ohio State Univ., 



1900 Coffey Rd., COLUMBUS, Ohio 43210, U.S.A. 

 a Morphogenesis and physiology of pineal gland. (Aves) 

 h Morphogenesis and physiology of blood. (Aves) 

 c Experimental morphology of pineal gland. (Bovidae, Mammalia) 

 VERBICKY, M. Sh. Cand.med.sci. — Inst, of Exper. Biol., Acad, of Med. Sci. of the 



U.S.S.R., Baltiyskaya St. 8, MOSCOW A-315, U.S.S.R. 

 VERDONK, N. H. Ph.D. — Zool. Lab., State Univ. of Utrecht, Janskerkhof 3, UTRECHT, 



Netherlands 

 a Cell-lineage and head-pattern in normal and Li-treated embryos. Limnaea stagnalis (Gas- 

 tropoda) 

 h Cell-lineage and head pattern in heat-shock treated embryos. Limnaea stagnalis (Gastro- 

 poda) 

 c Determination of bilateral symmetry in the head region. Limnaea stagnalis (Gastropoda) 

 d Germinal localization in eggs. Dentalium spec. (Scaphopoda); Patella spec. (Gastropoda) 

 VEREISKAYA, Miss V. N. Cand.biol.sci. — Lab. of Developm. Cytogenet., Inst, of 

 Developm. Biol., Acad, of Sci. of the U.S.S.R., 26 Vavilov St., MOSCOW V-133, 

 U.S.S.R. 

 VERHOFSTAD, A. A. J. Med.Drs. — Dept. of Anat. and Embryol., Med. Fac, Univ. of 



Nijmegen, Geert Grooteplein Noord 21, NIJMEGEN, Netherlands 

 a Differentiation of epinephrine- and nor-epinephrine-containing cells in the adrenal me- 

 dulla, studied by histochemical methods. Mus rattus (Rodentia) 

 VERNET, G. Dr.Biol. — Lab. de Biol. Cell., Fac. des Sci., B.P. 347, 51- REIMS, France 

 a Synthesis of porphyrins during development. Lineus viridis (Nemertea) 

 h Synthesis of porphyrins during anterior regeneration. Lineus ruber, L. lacteus (Nemertea) 

 c Fine structure of photoreceptors during anterior regeneration. Lineus ruber (Anopla, 



Nemertini) 

 VERNET (CORNUBERT). Mrs. G. Dr.es Sci., Prof. — Lab. de Physiol, des Invertebres, 



Fac. des Sci., Place E. Bataillon, 34-MONTPELLIER, France 

 a Regeneration of nervous and neurosecretory cells of the eye stalk. Pachygrapsus mar- 



moratus (Decapoda, Crustacea) 

 h Sinus gland regeneration. Pachygrapsus marmoratus (Decapoda, Crustacea) 

 VERNON, G. A. Dr. — Dept. of Chem., Univ. Coll. London, Gower St., LONDON W.C.I. 



England 

 VERWOERD, C. D. A. M.D. — Anat.-Embryol. Inst., Univ. of Amsterdam, Mauritskade 



61, AMSTERDAM-O.. Netherlands 

 a Effects of X-rays on growth and regeneration. Ambystoma mexicanum (Urodela) 

 h Differentiation of germ layers. (Mammalia) (in collaboration with C. G. van OOS- 



TROM) 

 c Development of the pelvic floor in the embryo. Homo sapiens (Primates) 

 d Development of branchial structures in embryos. Mus spec. (Rodentia) 

 VIANEY-LIAUD, M. D.E.A. — Lab. d'Evolut., Fac. des Sci. de Paris, 105 Bd. Raspail, 



75 PARIS 6, France 

 a Controle des gametogeneses. Australorbis glabratus (Pulmonata, Gastropoda) 

 VICKER, M. G. B.Sc. — Dept. of Cell Biol.. Univ. of Glasgow, GLASGOW W.2, Scot- 

 land, U.K. 

 a The effect on cell interactions of treatments that chemically modify the outer surface of 



dissociated embryonic cells. Gallus domesticus (Aves) 

 VILIMKOVA (HABROVA), Mrs. V. RNDr. — Dept. of Exper. Zool., Charles Univ., 



Vinicna 7. PRAHA 2, Czechoslovakia 

 a Nucleic acids and subcellular particles in oogenesis and early development. (Amphibia) 



(in collaboration with J. NEDVIDEK) 

 VILLA, Miss L. D.Sc. — 1st. di Zool., Univ. di Palermo, Via Archirafi 18, 90123 PALER- 

 MO, Italy 

 a Ultrastructural morphology of oocytes. Chaetopterus (Polychaeta, Annelida) 

 h Electron microscope studies on egg development. Sternaspis spec. (Polychaeta, Annelida) 

 VINCENT, W. S. Ph.D., Prof. — Dept. of Anat. and Cell Biol., School of Med., Univ. 

 of Pittsburgh. PITTSBURGH, Pa. 15213. U.S.A. • 



a Control of ribosome formation in early oocytes; nucleolar chemistry of oocytes. Asterias 

 forbesii, Arbacia punctulata (Echinodermata) 



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