YAZYKOV, A. A. Cand.biol.sci. — Inst, of Expcr. Biol., Acad, of Med. Sci. of the U.S.S.R., 



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

 a Study of cell aggregation and cell interactions. (Porifera) 



• YNTEMA. C. L. Ph.D., Prof. — Dept. of Anat., School of Med., State Univ. of N.w 



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

 a Stages in embryonic development. Chelydra serpentina (Chelonia) 

 YOSHIKAWA, I. — Dcpt. of Genet., Nagasaki Univ. School of Med., 12-4, Sakamotomachi, 



NAGASAKI. Japan 

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

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

 a The initiation and control of mitosis in axillary buds released from apical dominance. 



Pisum sativum 

 YOUNG, B. A. Ph.D. — Dept. of Anat., Med. School, Univ. of Birmingham, Edgbaston, 



BIRMINGHAM 15, England 

 a Fine structure of foetal thyroid. Homo sapiens (Primates) 

 b Placentation in marine species. (Mammalia) 

 YUROWITZKY, Yu. G. Cand.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 Regulation of glycolysis and respiration in embryos. Misgurnus fossilis (Cobitidae, Tele- 



ostei) 



• 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) 



ZABWSKI, J. M.Sc. — Dept. of Exper. 2xjol., Polish Acad, of Sci., ul. Kopernika 7, KRA- 

 KOW, Poland 



ZAFFAGNINI, F. Dr., Prof. — 1st. di Zool., Fac. di Sci.. Univ. di Bologna, Via S. Giacomo 



9, BOLOGNA, Italia 



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 Cytological aspects of intersexuality in tadpoles. Rana esculenta (Anura) 

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



nepistimiopolis (Kouponia), ATHENS (621), Greece 

 a Notochord implants into the developing hind limb of tadpoles. Bu[o bufo. B. vicidis. Rana 



ridibunda (Anura) 

 h Historadiographic study of the regenerating notochord after incorporation of radioactive 



isotopes. Bufo uiridis, B. bufo, Rana ridibunda (Anura) 

 ZAHLAVA, J. MUDr., CSc. — Inst, of Pathophysiol., Med. Fac, Charles Univ., Lidicka I, 



PLZES, Czechoslovakia 

 a Developmental changes of the connections between medical geniculate body and different 



cortical auditory areas in g. ectosylvius anterior and medius. Canis domesticus fCarnivocal 

 ZAHND, P. J. J. Dr.en Med. — Inst. d'Embryol., Fac. de Med., 1 Place de THoDital. STRAS- 

 BOURG, France 

 a Formation de I'oeuf; physiologie; ultrastructure. (Pisces; Reptilia; Aves) 

 b Organogenese (ultrastructure) du pancreas. Gallus domesticus (Aves) 

 c Maturation in the central nervous system, with special reference to the visual area and 



the motor nuclei of the myelencephalon (electron microscopy). Oryctolagus cuniculus 



(Lagomorpha) 

 d Study of cultured embryonic tissues (liver, heart muscle; organotypic and histiotypic) 



submitted to different drugs (steroid hormones particularly); electron microscopy. Gallus 



domesticus (Aves) (in collaboration with J. V. RUCH) 

 e Embryology of thymic tissue (electron microscopy). (Rodentia) 

 ZALIK, S. Ph.D., Prof. — Div. of Plant Biochem. and Physiol., Dept. of Plant Science 



Univ. of Alberta. EDMONTON, Alberta, Canada 

 a Effects of light of different wavelengths on changes in metabolism of growth regulators 



and of lipids in developing seedlings. Phaseolus vulgaris. Ph. coccincus. Soya max 

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



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. — Catt. di Anat. comp., Univ. di Milano, Via Celoria 



10, MILANO, Italia 



ZEILMAKER, G. H. Ph.D. — Netherlands Cancer Inst., Sarphatistraat 108, AMSTERDAM, 



Netherlands 

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

 b Egg transplantation. Mus musculus (Rodentia) 



165 



