a Relation between auxin transport and growth in seedlings as influenced by age and light. 



Pisum sativum (Leguminosae), Zea mays (Gramineae) 

 b Apical dominance; characterization of the hormonal control exhibited by shoot apices in 



lateral bud suppression. Pisum sativum (Leguminosae), Coleus blumei (Labiatae) 

 SCRIBA, M. E. L. Ph.D. — Zool. Inst, der Univ., Ketzerbach 63, 355 MARBURG/Lahn, 



W.Germany 

 a Developmental abnormalities caused by lethal factors. Drosophila melanogaster (Diptera) 

 SEAGO, J. L. Ph.D. — Dept. of Bot. and Physiol., State Univ. Coll., OSWEGO, N.Y. 



13126, US.A. 

 SEARLS, R. L. Ph.D., Prof. — Dept. of Biol., Temple Univ., Broad and Berks St., PHILA- 

 DELPHIA, Pa. 19122, U.S.A. • 

 SEDLACEK, J. M.D., Ph.D. — Lab. of Embryophysiol., Inst, of Physiol., Charles Univ., 



Albertov 5, PRAHA 2, Czechoslovakia 

 a Development of spontaneous and evoked phasic activity of CNS in prenatal period. 



(Aves; Mammalia) 

 b Development of low and high frequency impedance in fetal brain tissue. (Aves; Mam' 



malia) 

 c Development of steady and membrane potential in fetal brain. (Aves; Mammalia) 

 d Development of extracellular environment of fetal brain (physical and chemical). (Aves; 



Mammalia) 

 e Development of membrane ATP-ase system in fetal brain tissue. Gallus domesticus (Aves) 

 SEDRA, S. N. Ph.D., Prof. — Dept. of Zool., Fac. of Sci., Alexandria Univ., Moharram 



Bey, ALEXANDRIA, Egypt • 



SEECOF, R. L. Ph.D. — Dept. of Biol., City of Hope Med. Center, 1500 E. Duarte Rd., 



DUARTE, Calif. 91010, U.S.A. 

 a In vitro differentiation of embryonic cells; which embryonic stages give cells 



competent to do this ?; identity of differentiating cells. Drosophila melanogaster (Diptera) 

 §EFTALIO£LU, Miss A. — Inst, of Histol. and Embryol., Med. Fac, Hacettepe Sci. Center, 



ANKARA, Turkey 

 a Development and differentiation of mast cells after stimulation with 48/80 (histology and 



histochemistry). Rattus norvegicus (Rodentia) 

 b Ultrastructural development and differentiation of mast cells. Rattus norvegicus (Rodentia) 

 SEGAL, S. J. Ph.D. — Biomed. Div., The Population Council, Rockefeller Univ., York Ave. 



and 66th St., NEW YORK, N.Y. 10021, U.S.A. • 



a Immunologic analysis of pituitary gonadotrophin function: development and species 



specificity. (Vertebrata) 

 b Mechanism of hormone action. (Vertebrata) 

 c Action of blastotoxic chemical agents. (Vertebrata) 

 d Oogenesis in the constant-estrus female. Rattus norvegicus (Rodentia) 

 e Studies on RNA in implantation. Rattus norvegicus (Rodentia), (Primates) 

 SEHGAL, P. P. Dr. — Dept. of Biol., East Carolina Univ., P.O.Box 2577, GREENVILLE, 



N.C. 27834, US.A. 

 a Factors regulating urease in cotyledons in vi t r o. (Angiospermae) 

 b Ontogenesis of urease synthesis. Canavalia ensiformis (Papilionaceae) 

 SEICHERT, V. MUDr. — Dept. of Anat., Charles Univ., U nemocnice 3, PRAHA 2, 



Czechoslovakia 

 a Experimental analysis of limb formation. Gallus domesticus (Aves) 

 SEIDEL, F. Dr.phil., Prof.(Emer.) — Zool. Inst, der Univ., Ketzerbach 63, 355 MARBURG/ 



Lahn, W.Germany • 



a Entwicklungsphysiologie im Stadium der Furchung und Bildung der Korpergrundgestalt. 



Platycnemis spec. (Odonata) , Oryctolagus cuniculus (Lagomorpha) 

 SEIDL, W. E. Dr.med. — Anat. Inst, der Univ., Kreuzbergring 36, 34 GOTTINGEN, 



W.Germany 

 a Ultrastruktur der Leberentwicklung. Homo sapiens (Primates) 

 SEIGER, M. B. Ph.D., Prof. — Dept. of Biol. Sci., Div. of Sci. and Engin., Wright State 



Univ., Col. Glenn Highway, DAYTON, Ohio 45431, U.S.A. 

 a The genetics and development of color and color pattern in the white and blue morphs. 



Anser caerulescens (Aves) 

 SEITZ, K.-A. Dr.rer.nat. — Zool. Inst, der Univ., Ketzerbach 63, 355 MARBURG/Lahn, 



W.Germany 

 a Ultrastructure of organ development, especially hemocytes and the storage tissue in the 



midgut. Cupiennius salei (Ctenidae, Araneida, Arachnida) 

 b Cell migration during early development (electron microscopy) . Same species as a 

 SEKERIS, C. E. Ph.D., Prof. — Physiol.-Chem. Inst., Med. School, Univ. Marburg, 355 



MARBURG-Lahnberge, W.Germany 

 a Protein and RNA synthesis during metamorphosis; correlation with hormonal (ecdysone) 



secretion. Calliphora ecythrocephala (Diptera) 

 b Mode of action of juvenile hormone. Periplaneta amevicana (Blattariae) , Calliphora 



erythrocephala (Diptera) 



163 



