WRBA, H. Dr.rer.nat., Dr.med. — Pathol. Inst, der Univ., Thalkirchnerstr. 

 36, MONCHEN 15, Deutsche Bundesrepublik 



a. Stoffwechsel in vitro. (Rodentia) 



b. Eihautbildung und Dif ferenzierung in vitro. (Rodentia) 

 c Heterotransplantation von Tumoren. (Rodentia) 



d. Missbildungen explantierter Keime. (Rodentia) 

 WRIGHT, T. R. F. A.B., M.A., Ph.D. — Dept. of Biol.. Johns Hopkins Univ., 

 Charles and 34th Sts., BALTIMORE 18, Md., U.S.A. 

 a. The ontogeny of gene-enzyme systems, particularly esterases. Drosophila 

 melanogaster (Diptera) 

 WROBLEWSKI, R. Dr.med., Prof. — Dept. of Gener. Biol., Silesian Acad, 

 of Med., Rokitnica, ZABRZE 8, Poland 



a. Regeneration of the thyroid gland. Cavia cobaya (Rodentia) 



b. Cytological and histochemical investigations on the regenerating tail. 

 Xenopus taevis (Anura) 



c. Sex determination. 



WURMBACH, H. Dr., Prof. — Entw.gesch.Abt., Zool. Inst, der Univ., 

 BONN, Deutsche Bundesrepublik 



a. Beeinflussung des Wachstums und der Differenzierung durch Wirkstoffe 

 (Schilddrusenhormon, Steroide, Thymuswirkstoffe). Lebistes spec, Xe- 

 nopus laevis, Gallus domesticus (Vertebrata) 



b. Formbildende Krafte beim Wachstum. (Wachstumsdynamik); formbil- 

 dende Bedeutung der Gewebe. Bufo spec, Xenopus laevis (Anura), Gallus 

 domesticus (Aves) 



WYTTENBACH, C. R. A.B., M.A., Ph.D. — Dept. of Anat., Univ. of Chi- 

 cago, CHICAGO 37, 111., U.S.A. 



a. Ontogeny of molecular specificity in the central nervous system. Gallus 

 domesticus (Aves) 



b. Gross and molecular changes during development and aging of hydranths. 

 Campanularia flexuosa (Hydroidea) 



XA VIER MORATO, M. J. Prof. — Inst, de Histol. e Embriol.. Fac de Med., 



Avenida 28 de Maio, LISBOA, Portugal 

 YAJIMA, H. M.A. — Biol. Lab., Coll. of Arts and Sci., Ibaragi Univ., MITO, 



Japan 



a. Effect of oxygen tension on the types of malformation. Chironomus dor- 

 salis (Diptera) 



b. Effect of partial irradiation by ultraviolet light on the types of malfor- 

 mation. Chironomus dorsalis (Diptera) 



YAMADA, T. D.Sc, F.I. I.E., Prof. — Biol. Div., Oak Ridge National Lab., 

 P.O. Box Y, OAK RIDGE, Tenn., U.S.A. 



a. Nuclear RNA synthesis in embryonic induction and regeneration. Tritw 

 rus spec. (Urodela) (in collaboration with S. KARASAKI) 



b. Autoradiographic studies of protein, RNA, and DNA synthesis in lens 

 regeneration. Triturus viridescens (Urodela) (in collaboration with 

 C. TAKATA) 



c Immunochemical studies of appearance of lens antigens during lens regen- 

 eration. Triturus viridescens (Urodela) (in collaboration with J. AL- 

 BRIGHT and C. TAKATA) 



d. The pattern of macromolecular synthesis in embryonic induction. Tritu- 

 rus pyrrhogaster (Urodela) (in collaboration with S. K. BRAHMA) 



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