ZEILMAKER, G. H. Ph.D. — The Netherlands Cancer Inst., Sarphatistraat 108, AMSTER- 

 DAM, Netherlands 

 a Endocrine aspects of blastocyst-implantation. Rattus norvegicus (Rodentia) 

 b Egg transplantation. Mus musculus (Rodentia) 



c Development of ectopic trophoblast. Ratfus norvegicus, Mus musculus (Rodentia) 

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



Physiol., Czcchoslov. Acad, of Sci., Flemingovo n. 2, PRAHA 6, Czechoslovakia 

 ZERBIB, C. D.E.S. — Lab. de Genet. Evolut. et de Biometrie, C.N.R.S., 91 GIF-sur- 



YVETTE. France 

 a Controle endocrine de la differenciation sexuelle. Lithobius forficatus (Chilopoda) 

 h Developpement post-embryonnaire de I'appareil genital. Scolopendra canidens (Chilopoda) 

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



49bis 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 In V it r o culture of regenerating tissues and organs. Dugesia lugubris, D. tigrina. Po- 

 ly celis nigra (Turbellaria) 

 b Influence of various factors (tissue and organ extracts) on pharynx regeneration. Dugesia 



lugubris, D. tigrina. Poly cells nigra (Turbellaria) 

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



HOUSTON, Tex., U.S.A. • 



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



Planck-Inst. fiir Immunbiol., Stefan-Meicr-Str. 8, 78 FREIBURG, W.Germany 

 a Normal development of early stages with special reference to the immunological and 



nutritional relations with the mother. Mesocricetus auratus, Cavia cobaya (Rodentia) 

 b Determination and diffentiation of the organ anlagen analysed by the use of teratogenic 



substances. Mesocricetus auratus, Cavia cobaya (Rodentia) 

 ZINN, K. M. M.D. — Ophthalmol. Dept., The Mount Sinai Hosp., 100th St. and Fifth 



Ave., NEW YORK, N.Y. 10029, U.S.A. 

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

 b Lens morphogenesis (electron microscopy etc.). Callus domesticus (Aves) 

 c The effects of lens removal on the development of the cornea. Callus domesticus (Aves) 

 d Protein synthesis in the developing lens (electron microscopy, sucrose density gradients, 



autoradiography etc.). Callus domesticus (Aves) 

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



2400, 00100 ROMA, Italy 

 a Cell differentiation and developmental genetics. 



b Molecular mechanisms of early embryonic differentiation. Mus musculus (Rodentia) 

 ZOTIN A I. Dr.biol.sci. — Lab. of Developm. Biophys., Inst, of Developm. Biol., Acad. 



of Sci. of the U.S.S.R., 26 Vavilov St., MOSCOW V-133, U.S.S.R. 

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



RIBEIRAO PRETO, S.P., Brazil 

 ZUCKERMAN, Sir S. M.D., D.Sc, Prof. — Zool. Soc. of London, Regent's Park, LON- 

 DON N.W.I, England 

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

 ZUST, Miss B. Lic.es Sci. — Lab. de Zool., Fac. des Sci. de Grenoble, Cedex 53, 38 



GRENOBLE, France 

 a Effects of hydrocortisone on the development of skin and feathers; sensitivity of dermis 



and epidermis to hydrocortisone (electron microscopy). Callus 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 macromolecular synthesis during induction and differentiation of the eye lens. 



Callus domesticus (Aves), Mus musculus (Rodentia) 

 h Developmental genetics of mutations affecting eye development. Mus musculus (Rodentia) 

 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. Callus 



domesticus (Aves) 

 h Culture behaviour of early embryonic tissues. Callus domesticus (Aves) 

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



192 



