Sre-Ste 



1 . Localization of enzyme activity. 



2. Structural integrity and enzyme activity. 



c. Cytological study of the developmental center (organizer). Gallus domes- 

 ticus (Aves) 



d. Analysis of mechanism of morphogenetic movements by time-lapse cine- 

 matography. Gallus domesticus (Aves) 



e. Analysis of dynamic population patterns (pattern formation by free- 

 swimming, ciliated and flagellated organisms). (Tetrahymena spec, 

 Euglena spec. (Protozoa) , Arbacia punctulata (Echinoidea) 



f. Integrative mechanisms in early development. (Aves) 



g. Role of the microenvironment in cell differentiation. (Aves) 

 SREBRO, Z. A. D.M. — Dept. of Biol, and Embryol., Acad, of Med., ul. 



Kopernika 7, KRAK6W, Poland 



a. Regeneration in the central nervous system. Xenopus laevis (Anura) 



b. Neurosecretion. (Pisces; Amphibia) 



SRINIVASACHAR, H. R. B.Sc, M.Sc. Ph.D. — Dept. of Zool., Central 



Coll., BANGALORE 1, India 

 STAAL, G. B. Ir., Dr. — Lab. for Entomol. Agricult. Univ., Binnenhaven 



7, WAGENINGEN, Netherlands 



a. Endocrine control of phase characters. (Orthoptera) 



b. Endocrine control of heteromorphic larval development. (Saturnidae, 

 Lepidoptera) 



STAGNI, Miss A. Dr., Prof. — 1st. di Zool., Via S. Giacomo 9, BOLOGNA, 

 Italia 



a. Regeneration, origin of germ-cells and gametogenesis. Spirorbis pagen- 

 stecheri (Serpulidae, Polychaeta) 



b. Sex determination and sex differentiation. Chlorohydra viridissima (Hy- 

 droidea) 



STALSBERG. H. Cand.med. — Anat. Inst., Univ. of Oslo, Karl Johansgt. 

 47, OSLO, Norway 



a. Extirpation of the epiphysis cerebri in the embryo. Gallus domesticus 

 (Aves) 



b. Hemostasis in the embryo. Gallus domesticus (Aves) 



STARCK, D. rDr.Med., F.I.I.E., Prof. — Dr. Senckenberg. Anat. Inst., Med. 

 Fak. der Univ., Ludwig Rehnstr. 14, FRANKFURT/Main-Sud, Deut- 

 sche Bundesrepublik 



STEDING, G. Dr.med. — Anat. Inst, der Univ., Kreuzbergring 36, G5T- 

 TINGEN, Deutsche Bundesrepublik 



a. Experimente zur Entwicklung des Riickenmarkes. Gallus gallus (Aves) 



b. Selbstdifferenzierung der Somiten. Gallus gallus (Aves) 



c. Fruhentwicklung. Gallus gallus (Aves) 



d. Strukturentwicklung des Uterus. Homo sapiens (Primates) 

 STEFAN, Miss Y. Dr. es Sci. — Lab. de Zool. et d'Embryol. exper., Inst, de 



Zool. et de Biol, gener., 12 Rue de l'Universite, STRASBOURG, France 

 a. Morphogenese du tractus genital et des gonades. Emys leprosa (Chelo- 



nia), (Ophidia) (en collaboration avec J. H. VIVIEN) 

 STEFANELLI, A. Dr., F.I.I.E., Prof.ord. — 1st. di Anat. comp. "G. B. 



Grassi", Fac. di Sci., Univ. di Roma, Via Borelli 50, ROMA, Italia 

 a. Histogenetic determination and differentiation of nervous cells. (Teleos- 



tei; Amphibia; Aves) 



154 



