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YOUNG, B. A. M.B., B.S., Ph.D. — Anat. Dept., London Hosp. Med. Coll., 

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



YOUNG, W. C. Ph.D., Prof. — Dept. of Anat., Med. School, Univ. of Kan- 

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YOW, F. W. B.S., M.S., Ph.D. — Kenyon College, GAMBIER, Ohio, 

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ZAAIJER, Miss J. J. P. Ph.D., M.I.I. E. — Lab. for Cytol. and exper. Histol., 

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2ABINSKI, J. M.Sc. — Dept. of Exper. Zool., Polish Acad, of Sci., ul. Koper- 

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 a. Experimental induction of immunological tolerance in embryos and adult 

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ZAFFAGNINI, F. Dr. — 1st. di Zool., Via S. Giacomo 9, BOLOGNA, Italia 



a. Role of nurse-cells and follicular cells in oogenesis. Daphnia magna 

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b. Endocrine centres, growth and gametogenesis. Daphnia magna (Clado- 

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ZAFIRATOS, C. Dipl.sc.nat. — Zool. Lab. and Museum, Univ. of Athens, 



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 a. Notochord implants into the developing and regenerating hind limb of 



tadpoles. Bufo bufo, B. viridis, Rana ridibunda (Anura) 

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a. Developpement du squelette. Facteurs influencant le developpement. Anas 

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b. Formation de l'oeuf. Physiologie; ultrastructure. (Pisces; Reptilia) 



c. Recherches sur le determinisme de la symetrie bilaterale. Ultrastructure. 



(Pisces; Reptilia) 



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

 ZELENA, Mrs. J. MUDr., Cand.Med.Sci. — Inst, of Physiol., Czechoslovak 



Acad, of Sci., Na cvicisti 2, PRAHA 6, Czechoslovakia 



a. Development of stretch-receptors in muscles with an augmented nerve 

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b. Stretch-receptors in regenerating muscles. Rattus norvegicus (Rodentia) 

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 a. La differentiation sexuelle. (Branchiopoda, Crustacea) 

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 a. Studies on the biochemistry and physiology of synchronized cell systems. 

 Tetrahymena piriformis (Holotricha, Ciliata) (in collaboration with K. 

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