a Cell-lineage and head-pattern in normal and Li-treated embryos. Lymnaea stagnalis 



(Gastropoda) 

 b Determination of bilateral symmetry in the head region. Same species as a 

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

 d Development of isolated blastomeres. Bith'ynia tentaculata (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.. Vavilov St. 26, MOSCOW 117133, 



U.S.S.R. _ . ._ .. . 



a Cytogenetics of diploid and polyploid strains. Bombyx mon, B. mandarina (Lepidoptera) 



(with B. L. ASTAUROV and V. A. STRUNNIKOV) 

 b Electron microscopy of normal and abnormal spermatogenesis of diploid and polyploid 



strains. Same species as a (with L. V. DANILOVA) 

 VERHOFSTAD, A. A. J. Med.drs. — Dept. of Anat. and Embryol., Univ. of Nijmegen, 



Geert Grooteplein N. 21, NIJMEGEN, Netherlands 

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



(histochemistry). Mus rattus (Rodentia) n „„ w „ „ 



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) 

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

 c Fine structure of photoreceptors during anterior regeneration. Lineus ruber (Nemertea) 

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



bres, Univ. des Sci. et Techn. du Languedoc, 34 MONTPELLIER, France 

 a Regeneration, development and growth. Pachygcapsus marmoratus (Decapoda, Crustacea) 

 VERRUSIO A. C. Ph.D. — Dept. of Anat., Div. of Biol. Sci., Univ. of Chicago, 1025 



East 57th St., CHICAGO, 111. 60637, U.S.A. 



— American Dental Assoc, 211 E. Chicago Ave., CHICAGO, 111. 60611, U.S.A. 

 a Cellular events during fusion of the palatal processes, especially the factor (s) causing 



epithelial breakdown. (Mammalia) 

 b A cytoplasmic factor affecting cleft palate production; biochemistry of a strain difference, 



perhaps due to a mitochondrial mutant. Mus musculus (Rodentia) 

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



61, AMSTERDAM-O., Netherlands 

 a Early differentiation of the endoderm. Mus musculus (Rodentia) (with C. G. van OOS- 



TROM and A. A. SCHOUTEN) „»„„ ,„ 



VIANEY-LIAUD, M. D.E.A. — Lab. d'Evol., Fac. des Sci., 105 Bd. Raspail, 75 PARIS Vie, 



VIJVERBERG, A. J. Drs. — Zool. Lab., Univ. of Leiden, Kaiserstr. 63, LEIDEN, Nether- 

 lands 

 a Proliferation (mitoses) and DNA synthesis in imaginal discs (autoradiography). Calltphora 



erythtocephala. (Diptera) 

 b Influence of X-irradiation and hormones (ecdysteron) on morphogenesis of imaginal discs. 



Calliphora erythtocephala (Diptera) 

 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) 



(with J. NEDVIDEK) „,,„„, ,„ 



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



Italy 

 a Ultrastructural morphology of oocytes. Chaetopterus (Polychaeta) 

 b Electron microscopy of egg development. Sternaspis spec. (Polychaeta) 

 VINCENT, W. S. Ph.D., Prof. — Dept. of Biol. Sci., Univ. of Delaware, NEWARK, Del. 



19711, U.S.A. • 



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



edulis, Spisula solidissima (Lamellibranchia), Asterias forbesii ( Asteroidea) , Arbacia 



punctulata (Echinoidea) 

 b Analysis of ribosomal gene amplification in oocyte development with respect to uni- and 



multinucleolate forms. Mytilus edulis, Spisula solidissima (Lamellibranchia), Asterias 



forbesii (Asteroidea), Arbacia punctulata (Echinoidea), Roccus saxatilis, Fundulus 



heteroclitus (Teleostei) 

 VISCUSO, Miss R. Dr. — 1st. di Zool., Univ. di Catania, Via Androne 81, 95124 CATANIA, 



Italy 

 a Physiological and experimental embryology of the earliest developmental stages. 



Eyprepocnemis plorans (Orthoptera) 

 VISSCHER (NEUMANN), Mrs. S. Ph.D.. Prof. — Dept. of Zool-Entomol., Montana 



State Univ., BOZEMAN, Mont. 59715, U.S.A. 

 a Maternal environmental inter-relationships with embryonic developmental rate. Aulocara 



elliotti (Orthoptera) 

 b Embryonic neuroendocrine functions. Aulocara elliotti (Orthoptera) 



187 



