ZACCANTI, F. Dr. — Inst, of Zool., Univ. of Bologna, Via S.Giacomo 9, 40126 BOLOG- 

 NA, Italy 

 a I n v i t r o culture of larval and adult gonads. Bufo bufo, Rana dalmatina (Anura) 

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

 c Analysis of sex differentiation by autoradiographic methods. Same species as a 

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



BOLOGNA, Italy 

 a Cytochemistry and electron microscopy of the nurse-cells and oocyte differentiation. 



Daphnia magna (Cladocera, Crustacea) 

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

 c Organization of reproductive system and gametogenesis. Limnadia lenticularis (Conchostra- 



ca), Derocheilocaris vemanei (M ystacocarida, Crustacea) 

 ZAMBONI, L. M.D., Prof. — Dept. of Pathol., Harbor Gen. Hosp., U.C.L.A., 1000 W. 



Carson St., TORRANCE, Calif. 90509, U.S.A. 

 a Electron microscopy of the fertilization process. Homo sapiens and other spp. (Primates) 

 b Embryonic development. Homo sapiens (Primates) 



ZEILMAKER, G. H. Ph.D. — Dept. of Endocrinol., Growth and Reprod., Med. Fac. Rot- 

 terdam, P.O.B. 1738, ROTTERDAM, Netherlands 

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

 b Egg transplantation. Mus musculus (Rodentia) 



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

 d Energy requirements and fertility of matured oocyte. Mus musculus (Rodentia) 

 e Fusion of blastomeres and oocytes with inactivated sendai virus. Mus musculus (Rodentia) 

 ZERBIB, C. D.E.S. — Lab. de Genet. Evol. et de Biomet, C.N.R.S., 91 GlF-sur-YVETTE, 



France 

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



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



— Lab. d'Embryol. Exp. du Coll. de France, 1 1 Place M.Berthelot, 75 PARIS Ve, France 

 a In vitro culture of regenerating tissues and organs. Dugesia lugubris, D. tigrina, 



Polycelis nigra (Turbellaria) 

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



species as a 

 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. fur Immunbiol., Stefan-Meier-Str. 8, 78 FREIBURG i.Br., 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 differentiation of organ primordia analysed by the use of teratogenic 



substances. Mesocricetus auratus, Cavia cobaya (Rodentia) 

 ZINN, K. M. M.D. — Ophthalmol. Dept., Mount Sinai Hosp., 100th St. and 5th Ave., NEW 



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

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



2400, 00100 ROMA, Italy 

 ZONNEVELD, B. J. M. Drs. — Dept. of Genet., Univ. of Leiden, Kaiserstr. 63, LEIDEN, 



Netherlands 

 a Developmental genetics of the fruiting bodies. Aspergillus nidulans (Ascomycetes) 

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



Acad, of Sci. of the U.S.S.R., 26 Vavilov St., MOSCOW 117133, U.S.S.R. 

 ZUBOVA, Mrs. S. E. — Biol. Inst, Leningrad State Univ., LENINGRAD B-164, U.S.S.R. 

 a Sex differentiation. (Chondrostei) 



b The process of gametogenesis under ionizing radiations. (Chondrostei) 

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

 DON N.W.I, England 

 ZUSMAN, I. N. Cand.biol.sci. — Inst, of Anim. Evolut. Morphol. and Ecol., Acad, of Sci. 



of the U.S.S.R., Lenin Ave 33, MOSCOW W-71, U.S.S.R. 

 a Resistance and adaptation of the early embryo. Testudo graeca, T. horsfieldi, Emys 



orbicularis and others (Chelonia) , Gallus gallus, Anas domesticus, Coturnix coturnix and 



others (Aves) 

 ZOST. Miss B. Dr.spec. — School of Biol. Sci., Flinders Univ., BEDFORD PARK, S.A. 



5042, Australia 

 a The germ plasm. Xenopus laevis (Anura) 

 ZWAAN, J. M.D., Ph.D., Prof. —Dept. of Ophthalmol., Children's Hosp. Med. Center, and 



Dept. of Anat., Harvard Med. School, BOSTON. Mass. 02115, U.S.A. • 



a Analysis of macromolecular synthesis during induction and differentiation of the eye lens. 



Gallus domesticus (Aves), Mus musculus (Rodentia) 

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

 ZWILLING, E. f Ph.D., Prof. — Brandeis Univ., WALTHAM, Mass. 02154, U.S.A. 



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