VAN GANSEN, Ms. P.; Prof. - Dept. of Molec. Biol., Free Univ. of Brussels, 67 rue des Chevaux, 



1640 RH0DE-ST-GEN£SE, Belgium 

 a Ageing in primary culture of embryonic fibroblasts: cell membrane morphology (SEM) and 



permeability, microtubules and microfilaments (TEM, biochemistry), nucleolar metabolism 



(autoradiography, biochemistry, TEM). Mus musculus (Rodentia) 

 VANNEREAU, Ms. A. - Lab. de Biol. Cell., Fac. de Pharm., Univ. Paris-Sud, 22 rue J. B. Clement, 



92290 CHATENEY-M ALABRY, France 

 a Gametogenesis, embryogenesis, formation of haustorium (ultrastructure). (Plantaginaceae, 



Angiospermae) 

 VANNINI, E.; Dr., Prof. - Inst, of Zool., Univ. of Bologna, Via S.Giacomo 9, 40126 BOLOGNA, Italy 

 a Experimental analysis of the development of the gonad and Bidder's organ. Bufo spec. (Anura) 

 b Inhibition by antibiotics of testosterone-induced sex-reversal in tadpoles. Rana dabnatina (Anura) 

 c General study of the problem of the "sex gradient" in various hermaphroditic animals (Hydroidea, 



Hydrozoa; Tricladida, TurbeUaria; Serpulidae, Polychaeta) 

 d Nervous system and neurosecretion in asexual reproduction, sexual differentiation and regenera- 

 tion. Hydra spec, Chlorohydra viridissima (Hydroidea), Dugesia spec, Polyceiis nigra, Den- 



drocoelum lacteum (TurbeUaria) 

 VAN PRAET, M. - Lab. de Biol, des Invert. Marins et Malacol., Museum Natl. d'Hist. Nat., 57 rue 



Cuvier, 75005 PARIS, France 

 VAN ROELEN, C. - Lab. of Anat. and Embryol., State Univ. Ctr., Groenenborgerlaan 171, 2020 



ANTWERPEN, Belgium 

 a Histochemistry and biochemistry of the carbohydrate-containing extracellular matrix of the 



blastoderm. (Aves) 

 b Concanavalin A-receptors during early development (histochemistry). (Aves) 

 VAN TOLEDO, B. - Dept. d'Embryol. et Teratol. Exp., Inst, de Biol. Anim., Fac. des Sci., Univ. de 



Fribourg, 1700 FRIBOURG, Switzerland 

 a Teratogenic action of fluoride. GaUus gallus (Aves) 

 VASSALL ADAMS, P. R.; Ph.D. - Dept. of Anat., St.Thomas's Hosp. Med. School, LONDON SEl 



7EH, England 

 a Developing conducting system in the heart in relation to induced ventricular septal defects. (Aves) 

 b Ultrastructure of the conducting tissue. (Aves), Homo sapiens (Primates) 

 VASSE, J. - Inst. d'Embryol. du C.N.R.S. et du Coll. de France, 49bis av. de la Belle Gabnelle, 



94130 NOGENT-sur-MARNE, France 

 a Hemopoiesis in the embryo. Emys orbicularis (Chelonia) 

 b Limb bud differentiation. (Chelonia) 

 VASSETZKY, S. G.; Cand.biol.sci. - N. K. Koltzov Inst, of Devi. Biol., USSR Acad, of Sci., Vavilov 



St. 26, MOSCOW 117334, U.S.S.R. 

 a Meiosis and duration of meiotic phases. Mactra spec. (Bivalvia), Strongylocentrotus spec. (Echi- 



noidea) 

 b History of meiosis research. (Animalia) 



VEDDER, F. D.; Drjer.nat. - Zool. Inst, der Univ., Weyertal 119, 5000 KOLN 41, B.R.D. (Germany) 

 a Protein metabolism during limb regeneration. Triturus vulgaris, T. alpestris (Urodela) 

 VELA FERNANDEZ, J. A. - Dept. de Genet., Fac.de Biol., Univ. de Barcelona, Plaga Universidad, 



BARCELONA-7, Spain ^ , . 



a Shell-gland induction (RNA synthesis inhibitors and autoradiography; blastomere deletion; 



lithium chloride treatment). Physa acuta, Lymnaea stagnalis (Gastropoda) 

 b Effects of endogamy in development. Same species as a 

 VELTMAN, W. A. M.; Drs. - Netherl. Inst, for Brain Res., IJdijk 28, 1095 KJ AMSTERDAM, 



Netherlands 

 a Adaptability of the nervous system of adult organisms, compared with normal development. 



Rattus norvegicus (Rodentia) 

 VENNEMAN, W.; Drs. - Lab. of Anat. and Embryol., Vrije Univ., v.d.Boechorststr. 7, 1081 Bl 



AMSTERDAM, Netherlands 

 a Teratology of cyclopia and palate clefts. Sus scrofa. Bos taurus (Artiodactyla), Homo sapiens 



(Primates) 

 VERDIER, G. P. J.;Dr.spec. - Dept. de Biol. Gen. etAppl., Univ. de Lyon I, 43 Bd. du 11 Novembre 



1918,'69621 VILLEURBANNE, France 

 VERDONK, N. H.; Ph.D., Prof. - Zool. Lab., State Univ., Transitorium III, Padualaan 8, 3584 CH 



UTRECHT, Netherlands 

 a Germinal localization in eggs. Various spp. (Mollusca) 

 b Cellular interactions in early development. Various spp. (Mollusca) 

 c Ultrastructural organisation of the plasma membrane and associated cytoplasmic elements: its 



role in early development. (Mollusca) (with J. G. BLUEMINK, Hubrecht Lab., J. A. M. v.d. 



BIGGELAAR and M. R. DOHMEN) 

 VERHOFSTAD, A. A. J.; Med.drs. - Dept. of Anat. and Embryol., Cathol. Univ., Geert Grooteplein 



N.21, 6500 HB MIJMEGEN, Netherlands 

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



(histochemistry). Rattus spec. (Rodentia) 

 VERMEULEN, C. A.; Dr. - Dept. of Devi. Plant Biol., State Univ. of Groningen, Biol. Ctr., Kerklaan 



30, 975 1 NN H AREN (Gr.), Netherlands 

 a Biochemistry of wall formation. Schizophyllum commune (Basidiomycetes, Fungi) 

 VERNA, J. M.; Dr.spec. - Lab. de Zool. et Biol. Anim., Univ. Sci. et Med. de Grenoble, B.P.53, 



38d4l'GREN6BLECedex, France 

 a Morphological and experimental study of dermal mesenchyme innervation in the embryo from 



5 days of incubation. Gallus gaUus (Aves) 

 114 



