a Development of extracellular and intracellular environment of foetal brain tissue (physical 



and chemical). Callus domesticus (Aves), Cavia porcellus (Rodentia) 

 b Development of membrane ATP-ase system in cellular and subcellular elements of fetal 



brain tissue. Relations to the endocrine factors. Gallus domesticus (Aves) 

 STAY, Miss B. Ph.D., Prof. — Dept. of Zool., Coll. of Lib. Arts, Univ. of Iowa, IOWA- 



City, Iowa 52240, U.S.A. 

 a Secretion of the brood sac and structure and physiology of the pleuropodia in relation to 



the nutrition of the viviparous embryo, compared to a non-viviparous species. Diploptera 



punctata, Nauphoeta cinerea (Blattariae) 

 STEARNER, Miss S. P. Ph.D. — Div. of Biol, and Med. Research, Argonne Natl. Lab., 



9700 South Cass Ave., ARGONNE, 111. 60439, U.S.A. 

 a Radiation effects on developing circulatory system. (Aves) 

 STEDING, G. Priv.Doz., Dr.med. — Anat. Inst, der Univ., Kreuzbergring 36, 34 GOT- 



TINGEN, W.Germany 

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

 b Selbstdifferenzierung der Somiten. Gallus gallus (Aves) 

 c Friihentwicklung. Gallus gallus (Aves) 

 d Strukturentwicklung des Uterus. Homo sapiens (Primates) 

 e Experimente zur Entwicklung der Extremitaten. (Aves) 

 f Experimen telle Analyse der Epitheldifferenzierung. Gallus gallus (Aves) 

 g Autoradiographische Analyse von Entwicklungsbewegungen embryonaler Organanlagen. 



Gallus gallus (Aves) 

 STEFANELLI, A. Dr., Prof.ord. — Inst, di Anat. Comp. "Battista Grassi", Univ. di Roma, 



Via A.Borelli 50, 00161 ROMA, Italy • 



a Nervous microsystems in vitro. Gallus domesticus (Aves) 

 b Reaggregation of neuroblasts of different nature; morphology of new synapses 

 STEFFEK, A. J. D.D.S., Ph.D. — Dept. of Anat., Univ. of Chicago, 1025 East 57th St., 



CHICAGO, 111. 60637, U.S.A. 



— American Dental Assoc, 211 E. Chicago Ave., CHICAGO, 111. 60611, U.S.A. 

 a Normal oral-facial development emphasizing formation of the primary and secondary 



palate. Mustela putorius furo, Macaca mulatta and other Mammalia 

 b Mechanisms involved and comparative pathogenesis of the lesions in experimentally 



-induced cleft lip and cleft palate. Same species as a 

 c Correlation of drug metabolism, distribution and localization with the congenital malforma- 

 tions in the fetus. Same species as a 

 STEFFENSEN, D. M. Ph.D., Prof. — Dept. of Bot., Univ. of Illinois, URBANA, 111. 61801, 



U.S.A. 

 a Origin and assembly of ribosomes studied by RNA hybridization and gel electrophoresis in 



different mutants and chromosome aberrations. Drosophila melanogaster (Diptera) 

 STEGEMAN, Mrs. J. H. J. — Histol. Lab.. Jan Swammerdam Inst., Univ. of Amsterdam, le 



Const. Huygensstr. 20, AMSTERDAM-W., Netherlands 

 a Foetal growth in relation to size and development of placenta. Ovis aries (Artiodactyla) 

 b Vascularization of the placenta in relation to its size and age. Same species as a 

 STEGNER, H.-E. Dr.med. — Univ.-Frauenklin., Martinistr. 52, 2 HAMBURG 20, W. 



Germany 

 STEIN, Miss K. F. Ph.D., Prof. (Emer.) — Dept. of Biol. Sci., Clapp Lab., Mount Holyoke 



Coll.. SOUTH HADLEY, Mass. 01075, U.S.A. 

 a The culture in vitro of mutant embryos, e.g. Lp/Lp; tracer studies. (Rodentia) 

 b Development and genetics of a circling mutation. Mus musculus (Rodentia) 

 c Genetics and development of a mutation — similar to or identical with lg/lg — causing 



blindness with eyes open at birth and the effect of cortical steroids on its development. 



Same species as b 

 STEINBERG, M. S. Ph.D., Prof. — Dept. of Biol., Princeton Univ., PRINCETON, N.J. 



08540, U.S.A. • 



a Direct measurements of strengths of intercellular adhesions among embryonic cells. Gallus 



domesticus (Aves) 

 b Mechanisms in cell aggregation and tissue recontruction. (Porifera), Rana pipiens (Anura), 



Gallus domesticus (Aves) 

 c Physics and chemistry of cell surfaces in relation to cell adhesion. (Porifera), Gallus 



domesticus (Aves) 

 d Mechanisms governing contact inhibition of mitosis and of cell movement (various tissue 



culture cell strains) 

 e Mechanisms of nerve - end organ integration (studies of reflex behavior after regeneration 



of sensory nerves into a topographically rearranged integumental field). Rana pipiens 



(Anura) 

 STEINITZ. H. f Ph.D., Prof. — Hebrew Univ. of Jerusalem. JERUSALEM, Israel 

 STENGER (HAFFEN), Mrs. K. E. Dr.es Sci. — Lab. d'Embryol. Exp., Coll. de France, 



1 1 Place M.Berthelot. 75 PARIS Ve, France • 



STfiPHAN, F. Dr.es Sci., Prof. — Lab. de Zool., U.E.R. Phys. Chim. Biol., Univ. Nancy I, 



Case Officielle 72, 54 NANCY 01, France 



172 



