YAO, T. Ph.D. — Lab. of Developm. Physiol.. Inst, for Exper. Biol.. Acad. 



Sinica. 865 Chang Ning Rd. SHANGHAI. China 

 YNTEMA. C. L. Ph.D., F.I.I.E.. Prof. — Dept of Anat.. School of Med., 



State Univ. of New York. 766 Irving Ave, SYRACUSE 10. N.Y., 



U.S.A. 



a. Induction and differentiation of ear ectoderm. Amby stoma punctatum 

 (Urodela) 



b. Regeneration of aneural limbs. Ambystoma punctatum (Urodela) 



c. Development of autonomic nervous system. Gallus domesticus (Aves) 

 (in collaboration with W. S. HAMMOND) 



d. Develooment of the visceral skeleton. Gallus domesticus (Aves) (in col- 

 laboration with W. S. HAMMOND) 



YOSHIKURA. M. Dr — Dept of Biol.. Fac. of Sci.. Kumamoto Univ.. 

 KUMAMOTO-shi. Japan 



a. Comparative embryology. (Araneae, Arachnoidea) 



b. Effect of light on the development of mygalomorph forms. Atypus kar- 

 schi, Ummidia fragaria (Araneae, Arachnoidea) 



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

 Kansas. LAWRENCE. Kansas. U.S.A. 



a. Reproduction as influenced by hypothyroidism and hyperthyroidism in 

 both males and females. Cavia porcellus (Rodentia) 



b. Sexual behaviour in the male. Cavia porcellus (Rodentia) 

 ZAAIJER. Miss J. J. P. Ph.D. — Lab. for Cytol. and exper. Histol.. Fac. 



of Med., Univ. of Leyde, Rijnsburgerweg 10, Boerhaavekwartier. LEI- 

 DEN. Holland 

 a. Cartilage and bone formation in vitro. Homo sapiens (Primates) 

 h. Muscle fibre development. Homo sapiens (Primates) 

 ZAHND, J. P. — Inst. d'Embryol., Fac. de Med.. 1 Place de I'Hopital, 

 STRASBOURG. France 

 a. Developpement du squelette. Facteurs influengant le developpement. 

 Anas spec. (Aves) 

 ZELLER, Ch. — Zool.-vergl. Anat. Inst.. Naturw. Fak.. Univ. Ziirich. 



Kiinstlergasse 16, ZtlRICH. Schweiz 

 ZENKER. W. Drmed. — Anat. Inst.. Wahringerstr. 13. WIEN 9, Oes- 

 terreich 

 a. Development of the organon buccotemporale Chievitz. (Mammalia) 

 ZEUTHEN. E. Dr phil., M.I.I.E. — Biol. Inst, of the Carlsberg Foundation. 

 16. Tagensvej. COPENHAGEN N. Denmark 



a. Study with Cartesian divers of mitotic rhythm in oxygen uptake and in 

 carbon dioxide output during cleavage period. (Echinoidea, Ciliata) 



b. Mitotic rhythm in reduced weight (weight below water) during cleavage. 

 Psammechinus microtuberculatus (Echinoidea) (in collaboration with 

 W. L. M. GEILENKIRCHEN, Utrecht) 



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

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

 HAMBURGER and P. PLESNER) 



ZIMMERMAN, A. A. M.I.I.E. — Dept of Anat.. Coll. of Med.. Univ. of 

 Illinois. 1853 West Polk Street, CHICAGO 12. 111.. U.S.A. 



ZOTIN. A. I. Cand.Biol.Sci. — Inst, of Animal Morphol. of the Acad, of 

 Sci. of the U.S.S.R.. Bolshaja Kalushskaja 33. MOSCOW V-7L 

 U.S.S.R. 



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