in early stages. Drosophila melanogaster (Diptera) 

 WEIR, Miss B. J. Ph.D. - Wellcome Inst, of Comp. Physiol., Zool. Soc. of London, Regent's Park, 



LONDON NW1 4RY, England 

 a Development and distribution of eggs and blastocysts between fertilization and implantation at 



day 18. Lagostomus maximus (Chinchillidae, Rodentia) 

 b Resorption of ail foetuses except two starting from 4th to 5th week of gestation. Lagostomus 



maximus (Chinchillidae, Rodentia) 

 WEISS, R. A. B.Sc. - Imp. Cane. Res. Fund Labs., Lincoln's Inn Fields, LONDON WC2A 3PX, 



England 

 a Interactions between oncornaviruses and differentiating cells. Gallus domesticus (Aves), Mus 



musculus (Rodentia) 

 b Social behaviour of cells in vitro. Gallus domesticus (Aves), Mus musculus, Rattus spec. (Roden- 

 tia) 

 WELLENSIEK, S. J. Dr., Ir., Prof. - Dept. of Horticult., Agric. Univ., Haagsteeg 3, P.O.Box 30, 



WAGENINGEN, Netherlands 

 a Effects of flower inducing factors (long day, vernalization, very high temperature, gibberellic 



acid) on the blocking in vegetative plants of different genotypes. Silene armeria (Caryophyl- 



laceae) 

 WENDER, M. B. M.D., Prof. - Inst, of Neurol, and Sensory Organs, Med. Acad., 49 Przybyszews- 



kiego St., 60 355 POZNAN, Poland 

 a The chemical composition and enzyme activity of developing nervous tissue with special referen- 

 ce to the period of myelination. Laboratory animals, Homo sapiens (Mammalia) 

 b The influence of ionizing radiation on the developing nervous system. Oryctolagus cuniculus 



(Lagomorpha) 

 c Histoenzymatic architectonics of the developing nervous system. Rattus norvegicus (Rodentia) 

 WENSING, C. J. G. D.V.M., Ph.D. - Vet. Anat. and Embryol. Inst., Univ. of Utrecht, Bekker- 



str. 141, UTRECHT, Netherlands 

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

 b Development of heart anomalies, especially hypoplasia of right and left heart. (Mammalia) 

 WENT, D. F. - Zool. Inst.I der Univ., Rontgenring 10, 87 WURZBURG, B.R.D. (Germany) 

 a Activation of cleavage. Pimpla turionellae (Ichneumonidae, Hymenoptera) 

 b Egg architecture before and after oviposition. Same species as a 

 c Ooplasm flows in experimentally activated eggs. Same species as a 

 WESSELS, J. G. H. Dr., Prof. - Lab. of Bot., State Univ., Kerklaan 30, P.O.Box 14, HAREN (Gr.), 



Netherlands 

 a Biochemistry and ultrastructure of sexual morphogenesis, especially in relation to enzyme 



regulation. Schizophyllum commune (Basidiomycetes, Fungi) 

 b Biochemistry and ultrastructure of hyphae, synthesis and degradation of wall constituents. Same 



species as a 

 WEST, J. D. B.Sc. - Inst, of Anim. Genet., Univ. of Edingburgh, West Mains Rd., EDINBURGH EH9 



3JN, Scotland, U.K. 

 a Developmental fate of different cell populations in chimaeras. Mus musculus (Rodentia) 

 WESTERGAARD, O. Ph.D. - Dept. of Biochem. B, Univ. of Copenhagen, 30 Juliane Maries Vej, 



2100 COPENHAGEN 0, Denmark 

 WESTRA, A. Ph.D. - Zool. Lab., Unit, of Cell Biol, and Morphogen., Univ. of Leiden, Kaiserst. 63, 



LEIDEN, Netherlands 

 a Chemotaxis and cell aggregation. Dictyostelium spec, Polysphondylium spec. (Acrasiales) 

 WEYGOLDT, P. Dr., Prof. - Biol. Inst.I (Zool.) der Univ., Katharinenstr. 20, 78 FREIBURG, B.R.D. 



(Germany) 

 a General and comparative embryology. (Pseudoscorpionidea and other Arachnida) 

 b Embryology. Tarantula marginemaculata (Amblypygidae, Arachnida) 

 c Embryology. Euphilomedes producta (Ostracoda, Crustacea) 

 WHITE, Miss J. B.A. - Dept. of Developm. Biol., Marischal Coll., Univ. of Aberdeen, ABERDEEN 



AB9 IAS, Scotland, U.K. 

 a Effects of hydrocortisone on embryonic tissue cells grown in vitro. Gallus gallus (Aves) 

 WHITFILL, C. Ph.D. - Lab. for Developm. Biol., Swiss Fed. Inst.of Technol., Sonneggst.5, 8006 



ZURICH, Switzerland 

 a Developmental enzymology. Gallus domesticus (Aves), Rattus spec. (Rodentia) 

 WHITTINGHAM, D. G. Ph.D. - Marshall Lab., Dept. of Physiol., Univ. of Cambridge, Downing St., 



CAMBRIDGE CB2 3EG, England 

 WIDERSTEN, B. Fil.Dr. - Zool. Inst., Univ. of Uppsala, Box 561, S-75122 UPPSALA 1, Sweden 

 a Larval development. (Actiniaria, Anthozoa; Scyphozoa) 

 WIDMER, B. G. Dr.phil.II - Biozentrum der Univ. Basel, Abt. Zellbiol., Klingenbergst. 70, 4056 



BASEL, Switzerland 

 a Characterization of mRNA synthesized in very early embryos. Drosophila melanogaster (Diptera) 

 WIERTZ (HOESSELS), Mrs. E. L. M. J. Ph.D. - Dienst voor Histol., Fac. der Wetenschappen, 



Rijkuniversitair Centrum, Middelheimlaan 1, ANTWERPEN, Belgium 

 WIEST, Miss L. Dr.phil. - Inst, fur Krebsforsch., Univ. Wien, Borschkegasse 8a, Postfach 72, A-1090 



WIEN, Austria 

 a Endocrine control in liver regeneration. Rattus norvegicus, Mus musculus (Rodentia) 

 b Interrelation of serum proteins and steroids, studied in embryogenesis, regeneration, and 



malignant proliferation of liver cells. (Rodentia) 

 WIGGLESWORTH, Sir V. B. Dr., Prof.(Emer.) - Dept. of Zool., Univ. of Cambridge, Downing St., 



CAMBRIDGE CB2 3DY, England 1SDB 



103 



