ZELENA (TOPICOVA). Mrs. J. MUDr., C.Sc. — Lab. of Electr. Microsc. Inst, of Physiol., 



Czechoslov. Acad, of Scis.. Flemingovo n.2, PRAHA 6, Czechoslovakia 

 ZERBIB, C. D.E.S. — Lab. de Genet. Evolutive du C.N.R.S., 91 GIF-sur-YVETTE, France 

 a Controle endocrinien de la differenciation sexuelle. Lithobius iorficatus (Chilopoda) 

 ZILLER (SENGEL), Mrs. C. Dr.es Sci. — Inst. d'Embryol. et Teratol. exper. du C.N.R.S.. 



49 bis Av. de la Belle Gabrielle, 94-NOGENT-sur-MARNE, France 



— Lab. d'Embryol. exper. du Coll. de France, 1 1 Place M. Berthelot, PARIS Ve. France 

 a Mise au point d'une technique de culture in vitro d'organes et de tissues en voie de 



regeneration, en adaptant la methode de Et. C. Wolff et K. Haffen. Dugesia lugubris 



(Turbellaria) 

 b Etude des conditions de la regeneration du pharynx; influence sur cette regeneration 



d'extraits de divers tissus et organes. Dugesia lugubris. D. tigcina, Polycelis nigra (Turbel- 



laria) 



• ZIMMERMAN, A. A. Prof.(Enier.) — Dept. of Anat.. Coll. of Med.. Baylor Univ., 



HOUSTON, Tex., U.S.A. 

 ZIMMERMANN, W. Dr.rer.nat. — Arbeitsgr. G.H.M.Gottschewski am Max-Planck-Inst. f 



Immunbiol., Stefan-Meier-Str. 8, 78 FREIBURG i.Br., Deutsche Bundesrepublik 

 ZINN, K. M. M.D. — Natl. Inst, of Neurol. Dis. & Blindness, Natl. Inst, of Health, Building 



30, Room B-6, BETHESDA, Md. 20014, U.S.A. 

 a Corneal morphogenesis (electron microscopy etc.). Gallus domesticus (Aves) 

 h The effects of lens removal on the development of the cornea. Gallus domesticus (Avesj 

 ZITO (BIGNAMI), Mrs. R. Ph.D. — Lab. di Radiobiol. Anim., C.N.E.N., C.S.N.-Casaccia, 



S. Maria di Galeria, ROMA, Italia 

 a Cell differentiation and developmental genetics. 

 ZOTIN. A. I. Dr.biol.sci. — Inst, of Developm. Biol., Acad, of Sci. of the U.S.S.R., Vavilov 



St. 26, MOSCOW V-133, U.S.S.R. 

 a Mechanism of cytokinesis in the cleavage of eggs. Strong ylocentrotus droebachiensin 



(Echinoidea), Acipenser giildenstadti (Chondrostei). Amby stoma mexicanum (Ucodela) 

 h Energetics of development. Strong ylocentrotus droebachiensis (Echinoidea), Acipenser 



giildenstadti (Chondrostei), Amby stoma mexicanum (Urodela) 

 c Thermodynamics of development. Strong ylocentrotus droebachiensis (Echinoidea), Acipen- 

 ser giildenstadti (Chondrostei), Ambystoma mexicanum (Urodela) 

 ZUCCHI, R. Ph.D. — Dept. of Genet., Fac. of Sci., Univ. of Sao Paulo. P.O. Box 301, 



RIBEIRAO PRETO, S.P., Brasil 

 a Development (seasonal variations, production of queens, workers and males). Bombus 



atratus (Hymenoptera) 

 h Production of alimentary and reproductive eggs. Trigona spp. (Hymenoptera) 

 ZUCKERMAN, Sir S. M.D., D.Sc, Prof . — Dept. of Anat.. Univ. of Birmingham, Edg- 



baston. BIRMINGHAM 15, England 

 a Development of the reproductive system; gametogenesis. (Rodentia; Primates) 

 ZUST, Miss B. Lic.es Sci. — Lab. de Zool., Fac. des Sci. de Grenoble, Domaine Universi- 



taire, 38-SAINT-MARTIN-d'HERES, France 

 a Effect of hydrocortisone on the development of the feather germs and feather tracts. Gallus 



domesticus (Aves) 

 ZWAAN, J. M.D., Ph.D., Prof . — Dept. of Anat., School of Med., Univ. of Virginia, 



CHARLOTTESVILLE, Va. 22901, U.S.A. 

 a Analysis of protein synthesis during induction and differentiation of the lens. Gallus 



domesticus (Aves), Mus musculus (Rodentia) 

 h Teratogenicity of drugs, and in particular of alkylating agents. Gallus domesticus (Aves) 



• ZWILLING, E. Ph.D., Prof. — Dept. of Biol., Brandeis Univ., WALTHAM. Mass. 



02154, U.S.A. 

 a Disaggregation and reaggregation of early embryos; effects on differentiation. Gallus 



domesticus (Aves) 

 b Culture behaviour of early embryonic tissues. Gallus domesticus (Aves) 

 c Ectoderm-mesoderm interaction in limb development. Gallus domesticus (Aves) 



166 



