b. Degeneration and regeneration of nervous cells. (Teleostei; Amphibia; 

 Aves) 



c. Social behaviour of cultivated cells. (Amphibia; Aves) 



d. Cytochemistry of development and regeneration. (Amphibia; Aves) 



e. Antimitotic action on in vitro explanted organs. Gallus domesticus 

 (Aves) 



f. Factors of nervous fibre orientation in vitro. Gallus domesticus, Co- 

 turnix coturnix japonica (Aves) 



g. Electron microscopy of spermatogenesis. Cavia cobaya (Rodentia) 

 h. Development of nervous synapses. (Vertebrata) 



STEFANOVA (MAZAKOVA), Mrs. Z. Dr. — Dept. of Gener. and Exp. 

 Zool.. Charles Univ., Vinicna 7, PRAHA 2, Czechoslovakia 



a. Transplantation of nuclei and cytoplasmic components. (Amphibia) (in 

 oration with F. SLADEcEK and A. ROMANOVSKY) 



b. Nucleo-cytoplasmic relations in early development. (Amphibia) (in collab- 

 oration with F. SLADECEK and A. ROMANOVSKY) 



STEGNER. H.-E. Dr.med. — Frauenklinik der Univ., Univ.-Krankenhaus 

 Eppendorf, Martinistr. 52. HAMBURG 20, Deutsche Bundesrepublik 



a. Histotopochemische und elektronenmikroskopische Untersuchungen an 

 Oozyten verschiedener Reife. Homo sapiens (Primates) (in Zusammen- 

 arbeit mit H. WARTENBERG) 



b. Organogenese des weiblichen Genitaltraktes; histotopochemische und 

 elektronenmikroskopische Untersuchungen. Homo sapiens (Primates) 



STEGWEE, D. Dr. — Lab. for Entomol. Agricult. Univ., Binnenhaven 7, 



WAGENINGEN, Netherlands 

 a. Chemical action of corpus allatum hormone. (Insecta) 

 STEIN, Miss K. F. A.B., M.S., Ph.D., Prof. — Dept. of Zool., Mount Ho- 



lyoke Coll., SOUTH HADLEY, Mass., U.S.A. 

 a. The culture in vitro of mutant embryos. (Rodentia) 

 STEINBERG, D. M. Dr.Biol.Sci., Prof. — Zool. Inst, Acad, of Sci. of the 



U.S.S.R., Universitetskaja Nabereshnaja 1, LENINGRAD B-164, 



U.S.S.R. 

 STEINBERG, M. S. B.A., M.A., Ph.D. — Dept. of Biol., Johns Hopkins 



Univ., Charles and 34th Sts., BALTIMORE 18, Md.. U.S.A. 



a. Chemical bonds between embryonic cells. Various spp. (Amphibia) 



b. Mechanism of selective adhesion (cell affinities) in embryonic cells. 

 Gallus domesticus (Aves) 



STEINITZ, H. Ph.D. — Dept. of Zool., Hebrew Univ., JERUSALEM, Is- 

 rael 

 a. Regeneration. (Salamandvidae, Urodela) 

 STENGER (HAFFEN), Mrs. K. E. Dr.es Sci. — Lab. d'Embryol. et Tera- 



tol. exper. du C.N.R.S., 49bis Avenue de la Belle Gabrielle, NOGENT 



sur Marne (Seine), France 



— Lab. d'Embryol. exper. du Coll. de France, 1 1 Place Marcelin Ber- 



thelot, PARIS Ve, France 

 a. Recherches sur la differenciation et l'intersexualite in vitro et in 



vivo des gonades embryonnaires. (Aves) (en collaboration avec Et. 



C. WOLFF) 



155 



