Vas 92 Waechter 



VASSEUR, E. J. E. Ph. lie. — Wenner-Grens Inst, for exper. Biol., Norr- 

 tullsgatan 16, STOCKHOLM 23, Sweden, 

 a. Studies on the chemical composition and the species specificity of its 

 chemical composition. Action of dissolved jelly coat substance (fertilizin) 

 on the spermatozoa. Paracentrotus lividus, Psammechinus miliaris and 

 other sea urchins. ( Echinodermata) 

 VEEN, H. G. v. d. — Zool. Lab. der Rijks Univ., Janskerkhof 3, UTRECHT, 

 Holland, 

 a. Inhibition of development by distilled water. Limnaea stagnalis (Gastro- 

 poda) 

 VERHEYEN, F. J. — Zool. Lab. der Rijks Univ., Janskerkhof 3, UTRECHT, 

 Holland, 

 a. Centrifugation of cleavage stages. Limnaea stagnalis (Gastropoda) (in 

 collaboration with Miss M. T. C. van EGMOND) 

 VERMAAK, D. B.Sc. — Zool. Inst., Univ. of Stellenbosch, STELLEN- 

 BOSCH, South Africa, 

 a. Ontogenesis of commissural connexions of the vena pudenda externa 

 and v.p. interna in an advanced human embryo. Homo sapiens (Primates, 

 Mammalia) 

 VIGLIANI, F. Dr — Inst, of human Anat, Corso Massimo d'Azeglio 52, 

 TORINO, Italy, 

 a. Late development and growth of bones, joints and muscles in mechani- 

 cally inert and denervated limbs. Canis familiaris (Mammalia) 

 VILLAFRANCA, G. W. de B.S. — Osborn Zool. Lab., Yale Univ., NEW 

 HAVEN 11, Conn., U.S.A. 

 a. Studies of various protein fractions in developing muscle in relation to 

 changes in physical properties and the development of contractility. 

 Mus norvegicus albinus (Mammalia) (under direction of E. J. BOELL) 

 VINTEMBERGER, P. Dr Med. — Inst. d'Embryol. et de Morphol. exper., 

 Fac. de Med., 1, Place de l'Hopital, STRASBOURG, (Bas-Rhin), 

 France, 

 a. Recherches sur le determinisme de la symetrie bilaterale chez les Ver- 

 tebtes. (Amphibiens) 

 VITAGLIANO, G. Dr Sc. — 1st. di Genet. dell'Univ. di Napoli, Fac. di Sci., 

 Via Mezzocannone 8, NAPOLI, Italia, 

 a. Ribonucleic acid supply to germ cells and determinism of meiosis. 

 Asellus (Crust., Isop.) 

 WADDINGTON, C. H. F.R.S., M.A., Sc.D., Prof. — Inst, of Anim. 

 Genet., West Mains Rd, King's Buildings, EDINBURGH 9, U.K. 



a. Regional specificity in living and dead organizers. Triton alpestris 



b. Cinematographic study of morphogenetic movements. (Amphibians and 

 Birds) 



c. Transplantation of cell constituents. Triton alpestris (Amphibia) 



d. Developmental effects of some genes in Drosophila melanogaster. (In- 

 secta) 



e. Study of abnormal embryos induced by injecting trypan blue into preg- 

 nant mice. Mus musculus (Mammalia) (in collaboration with T. C. 

 CARTER) 



WAECHTER, Miss H. Dr rer. nat. — Heiligenberg-Inst. (Abtlg. Mangold), 

 (17b) HEILIGENBERG, Kreis Oberlingen/Bodensee, Deutschland 

 (Franzosische Zone). 



