a Gamparative study on in vitro development of organ primordia. Mus mtisculus (Ro- 



dentia). Homo sapiens (Primates) 

 YATVIN, M. B. Ph.D. — Dept. of Radiol., Med. School, Univ. of Wisconsin, 1300 Uni- 

 versity Ave.. MADISON, Wis. 53706, U.S.A. 

 YAZAKI, Miss I. M.A. — Embryol. Sect., Dept. of Biol., Tokyo Metropolitan Univ., 



Setagaya-ku, TOKYO, Japan 

 YAZYKOV, A. A. Cand.biol.sci. — Inst, of Exper. Biol., Acad, of Med. Sci. of the 



U.S.S.R., Baltiyskaya St. 8, MOSCOW A-315, U.S.S.R. 

 YNTEMA, C. L. Ph.D., Prof. — Dept. of Anat., School of Med., State Univ. of New York, 



766 Irving Ave., SYRACUSE, N.Y. 13210, U.S.A. • 



a Development of carapace. Chelydra serpentina (Chelonia) 

 b Incidence of twinning. Chelydra serpentina (Chelonia) 



c Acceptance of homografts and xenografts during embryonic stages. (Chelonia) 

 YOSHIDA, K. Ph.D. — Dept. of Radiotherapy, Cancer Research Lab., Mercy Hospital. 



1400 Locust St., PITTSBURGH, Pa. 15219, U.S.A. 

 a Macromolecular synthesis during lens differentiation in vitro. Callus domesticus 



(Aves) 

 YOSHIKAWA, I. — Dept. of Genet., School of Med., Nagasaki Univ., 12-4, Sakamoto- 



machi, NAGASAKI, Japan 

 a Radiation genetics (embryo, germ cells). Drosophila melanogasfec (Diptera) 

 YOSHIKAWA (FUKADA), Mrs. M. Ph.D. — Dept. of Embryol., Carnegie Inst, of 



Washington. 115 W. University Parkway. BALTIMORE, Md. 21210, U.S.A. 

 a Animal viruses (esp. tumor viruses) as tools in studying embryonic development. Callus 



gallus (Aves) (in collaboration with J. D. EBERT and R. J. HAY) 

 YOUNG, B. — Dept. of Botany, Univ. of Alberta, EDMONTON, Alta., Canada 

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

 BRIDGE CB2 3DY, England 

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

 b Electron microscopy of developing endocrine glands. (Pinnipedia. Cetacea) 

 YQ (KOU), Mrs. N. W. B.S. — Dept. of Biomorph., Natl. Defense Med. Center, P.O. Box 



7432, TAIPEI, Taiwan, Republ. of China 

 a Tadpole tissue competence to thyroxin treatment at different periods after thyroidectomy. 



Rana spec. (Anura) 

 h Growth and pituitary cytology of thyroidless adults induced from thyroxin treatment on 



thyroidectomized tadpoles. Rana spec. (Anura) 

 YUROVITZKY, Yu. G. Cand.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. 

 YVROUD, Miss M. — Lab. d'Anat. Comp., Fac. des Sci. d'Orsay, Univ. de Paris, Batiment 



441, 91-ORSAY. France 

 a Etude experimentale du developpement du canal naso-lacrymal chez les larves. Discoglos- 



sus pictus, Alytes obsfefricans (Anura) 

 ZAAIJER, Miss J. J. P. Ph.D. — Lab. for Cell Biol, and Histol., Fac. of Med., State Univ., 



Rijnsburgerweg 10, LEIDEN, Netherlands • 



a Limb development (organ culture). (Vertebrata) 

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



of the reproductive tract (organ culture). (Aves; Mammalia) 

 ZACCANTI, F. Dr. — Inst, of Zool., Fac. of Sci., Univ. of Bologna, Via S. Qacomo 9, 



40126 BOLOGNA, Italy 

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

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

 ZAFFAGNINI, F. Dr., Prof. — Inst, of Zool., Fac. of Sci., Univ. of Bologna, Via S. 



Giacomo 9, 40126 BOLOGNA, Italy 

 a Cytochemical and electron microscopical study of the nurse-cells and oocyte differentiation. 



Daphnia magna (Cladocera) 

 b Endocrine centres, growth, moulting and gametogenesis. Daphnia magna (Cladocera) 

 c Organization of reproductive system and gametogenesis. Limnadia lenticulads (Concho- 



straca), Derocheilocaris remanei (Mystacocarida, Crustacea) 

 ZAFIRATOS, K. Ph.D. — Zool. Lab. and Museum, Fac. of Sci., Univ. of Athens, Panepis- 



timiopolis (Kouponia), ATHENS (621), Greece 

 ZAHLAVA, J. MUDr.. CSc. — Inst, of Pathophysiol., Med. Fac, Charies Univ., Lidicka 1, 



PLZEl^, Czechoslovakia 

 ZALIK, S. Ph.D., Prof. — Div. of Plant Biochera. and Physiol., Dept. of Plant Sci., Univ. 



of Alberta, EDMONTON, Alta., Canada 

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



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

 a Electron microscope studies on the fertilization process. Homo sapiens and other spp. 



(Primates) 

 h Embryonal development. Homo sapiens (Primates) 

 ZAVANELLA, Miss T. Dr.biol.sci. — Cat. di Anat. Comp., Univ. di Milano, Via Celoria 



10. MILANO. Italy 



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