a Preimplantation development in vivo and in vitro. Mus musculus (Rodentia) 



b Chromosomal aberrations in embryogenesis. Same species as a or,.^iT 



WYL, E.von; Dipl.phil.II - Zool.-Vergl. Anat.Inst. der Univ. Zurich, KUnstlergasse 16, 8006 ZURICH, 



Switzerland . „x,. , oxta 



a Isolation and characterization of low molecular weight RNA and messenger RNA present m 



unfertihzed eggs. Drosophila melanogaster (Diptera) 

 WYLES, Mrs. Ch. WISE; B.Sc.(Hons.) - Zool. Dept., Univ. Coll., Belfield, Stillorgan Rd., DUBLIN 4, 



Ireland 

 \VYLIE, C. C; Ph.D. - Dept. of Anat. and Embryol., Univ. Coll. London, Gower St., LONDON 



WC1E6BT, England 

 a RNA and DNA metaboUsm during oogenesis and in early embryos. Callus domesticus (Aves) 

 b Effect of polyamines on nucleic acid metabolism in oocytes. Xenopus laevis (Anura) 

 c Differentiation of primordial germ cells. Same species as b 

 d Genes for rRNA in oocyte and embryo. Same species as a 

 WYSS, Ch.; Ph.D. - Inst, of Cell Biol., Swiss Fed. Inst, of Technol., Honggerberg, 8049 ZURICH, 



Switzerland 

 a Somatic cell genetics. Drosophila spec. (Diptera) , /m , 



WYSS U R ; Dr. - Inst, fiir Pflanzenkrankh. und Pflanzenschutz, Fachgeb. Entomol. und Okol., 



fechn. Univ., Herrenhauser Str.2, 3 HANNOVER-Herrenhausen, B.R.D. (Germany) 

 a Film analysis of embryonic development, especially cleavage pattern and hatching behaviour. 



Trichodorus similis, Longidorus elongatus (Nematoda) 

 XAVIER MORATO, M. J.; Prof. - Inst, de Histol. e Embriol., Fac. de Med., Av. Prof. Egas Moniz, 



LISBOA 4, Portugal ^^ t..,.., ,x, 



YACOB, A. Y.; M.Sc. - Unit Devi Biol., Dept. of ZooL, Univ. ColL, Belfield, Stillorgan Rd., DUBLIN 



4, Ireland 

 a Development of the pseudobranch (electron microscopy, histochemistry). Poeciha reticulata 



(Telcostei) 

 YAMADA, T.; D.Sc, Prof. - Dept. de BioL Molec, Inst. Suisse de Rech. Exp. sur le Cancer, rue 



Bugnon 21, 1011 LAUSANNE, Switzerland 

 a Factors controlling dedifferentiation and redifferentiation of cultured iris epithelial cells, studied 



by cell injection combined with immunofluorescence for gamma crystallin. Notophthalmus 



viridcscens (Urodela) (with A. GRASSMANN and S. P. MODAK) . . 



b Ultrastructural cytochemistry of cell surface alterations associated with dedifferentiation and 



redifferentiation of iris epithelial cells. Same species as a 

 YARDIN M. H.; M.D., D.D.S. - Lab. of Periodontol. Res., Dental Fac, Rennes I Univ., 2 place 



Pasteur, 35000 RENNES, France ^ ^ ..,r.^,r.r^r, 



YOUNG, B. A.; M.D., Ph.D. - Anat. School, Univ. of Cambridge, Downing St., CAMBRIDGE 



CB2 3D Y, England 

 a Electron microscopy of the placenta. (Pinnipedia, Cetacea) 

 b Electron microscopy of developing endocrine glands. Same species as a 

 ZAAYER, Miss J. J. P.; Ph.D. - Lab. for Cell BioL and Histol., State Univ., Rijnsburgerweg 10, 



LEIDEN, Netherlands ^ . 



a Hormonal activity of fetal gonads and adrenal glands with regard to the development ot the 



reproductive tract (organ culture). Cavia porcellus (Rodentia), Homo sapiens (Primates) 

 b Hormonal activity of the placenta in organ culture. Cavia porcellus (Rodentia) 

 ZACCANTl, F.; Dr., Prof. - Inst, of Zool., Univ. of Bologna, Via S.Giacomo 9, 40126 BOLOGNA, 



Italy 

 a Hormonic regulation of ovarian and Bidder's organ oogenesis. Bufo bufo (Anura) 



b Effect of steroids on sex differentiation (autoradiography). Rana dalmatina, R. latastei, R. 

 esculenta, Bufo bufo (Anura) ^^,^, r./^inA t* i 



ZACCHEl, Mrs. A. M. - 1st. di Anat. Comp., Univ. di Roma, Via A.Borelh 50, 00161 ROMA, Italy 



a Retinal and neural structures in vitro. Gallus domesticus (Aves), Mus musculus (Rodentia) 



ZACCONE, G.; Dr., Prof. - Inst, of Zool. and Comp. Anat., Univ. of Messina, Via del Verdi 75, 9810U 

 MESSINA, Italy .... , 



a Contribution of material for yolk synthesis by follicular cells penetrating into the ooplasm 

 (cytochemistry). Octopus loilgaris (Cephalopoda) . „. . 



b Structural and cytochemical modifications of yolk globules during vitellogenesis. Pisania macu- 

 losa (Gastropoda) ^ ^. _ ^nn/r r>/-M r^r-XTA 



ZAFFAGNINI, F.; Dr., Prof. - Inst, of Zool., Univ. of Bologna, Via S.Giacomo 9, 40126 BOLUGNA, 



a Oogenesis in parthenogenetic and amphigonic eggs. Daphnia spec. (Cladocera, Crustacea) 



b Endocrine centres, growth, moulting, and gametogenesis. Same species as a 



c Organization of reproductive system and gametogenesis. Limnadia lenticulans (Conchostraca, 



Crustacea), Strongyloides papillosus (Rhabdiasoidea, Nematoda) 

 ZAFIRATOS, C; Dr.Sci. - Lab. of Zool., Univ. of Athens, Panepistimiopohs (Kouponia), 621 



ATHENS Greece 

 a Behaviour and fate of larval tissues transplanted into developing limb bud. Bufo bufo, B.viridis 



(Anura) . , i. • /^ i n • \ 



b Histology of regeneration after treatment with tritiated thymidine. Dugesia lugubris (Turbellana) 

 ZAHLAVA, J.; MUDr., CSc. - Inst, of PathophysioL, Charles Univ., Lidicka 1, 306 05 PLZbN, 



a Developmental changes in the connections between medial geniculate body and homo- or contra- 

 lateral cortical auditory areas in the gyrus ectosylvius anterior and medius. Cams familiaris 

 (Carnivora) 



109 



