SONDHI, K. C. f Ph-D., Prof. — Rutgers State Univ., NEWARK. N.J. 07102, U.S.A. 

 SONI, S. L. Ph.D. — Dept. of Botany, Univ. of Michigan, ANN ARBOR, Mich. 48104, 



U.S.A. 

 a Electron microprobe analysis of silica accumulation in immature and mature stages of leaf 



and internode. Oryza spec, Avena spec. (Gramineae), Cyperus (Cyperaceae) 

 b Hormonal regulation of growth and invertase activity in stems and coleoptile segments. 



Avena spec, Oryza spec. (Gramineae) 

 SOPINSKI, M. M.B. — Dept. of Histol. and Embryol., Acad, of Med., ul. Narutowicza 60, 



EODz, Poland 

 a The distribution and activity of some hydrolytic enzymes in lysosomes and of oxido- 

 reducing enzymes in mitochondria, in various tissues and organs during metamorphosis and 

 embryogenesis. Xenopus laevis (Anuca), Gallus domesticus (Aves), Rattus norvegicus, 

 Cavia porcellus (Rodentia) 

 SORIANO, L. I. M.D. — Inst. d'Embryol. et Teratol. Exper. du C.N.R.S., 49bis Av. de la 

 Belle Gabrielle, 94 NOGENT-sur-MARNE, France • 



a RNA synthesis in embryonic skin. Gallus gallus (Aves), Mus musculus (Rodentia) 

 b mRNA synthesis at the polysomal level in embryonic tissues; base composition of mRNA 



and rRNA. Gallus domesticus (Aves) (with J. DESVEAUX) 

 SPAZIANI, E. Ph.D., Prof. — Dept. of Zool., Coll. of Lib. Arts, Univ. of Iowa, IOWA- 



City, Iowa 52240, U.S.A. 

 a Mechanism of ovarian and testicular hormone action on growth and development of 



reproductive tissues: uterus, seminal vesicles, prostate. Rattus norvegicus (Rodentia) 

 b Hormonal control of melanocyte differentiation and pigment synthesis. Rattus norvegicus 



(Rodentia) 

 c Biosynthesis of growth and differentiating hormone (ecdysone) by the Y-organ; variations 



accordinq to molt cycle. Hemigrapsus nudus (Decapoda, Crustacea) 

 SPECTOR, C. Ph.D. — Dept. of Biol., Univ. of Pittsburgh, PITTSBURGH, Pa. 15213, 



U.S.A. 

 a The possible control of development by differential biosynthesis of specific gibberelhns. 



Gibberella fujikuroi (Ascomycetes) 

 SPENCER, R. P. M.D., Ph.D., Prof. — Dept. of Radiol., Yale Univ., 333 Cedar St., NEW 



HAVEN, Conn. 06504, U.S.A. 

 a Development of heart weight and blood volume. (Delphinoidea, Cetacea), (Mammalia) 

 b Development of kidney. (Mammalia) 



c Development of liver and of spleen. (Mammalia and others) 

 d Development of liver, spleen, and thyroid as a function of age, height, weight, and body 



surface area (radio-isotope study). Homo sapiens (Primates) 

 SPERRY, R. W. Ph.D. — Div. of Biol., Calif. Inst, of Technol., PASADENA, Calif. 91109, 

 U.S.A. • 



SPIEGEL, Mrs. E. SCLUFER Ph.D. — Dept. of Biol. Sci., Dartmouth Coll., HANOVER, 



N.H. 03755, U.S.A. 

 a Protein changes in development. Lytechinus pictus, Strong ylocentrotus purpuratus 



(Echinoidea) , Rana pipiens, R. catesbeiana (Anura) (with M. SPIEGEL) 

 b Role of enzyme induction in development. Rana pipiens, R. catesbeiana (Anura) (with 



M. SPIEGEL) 

 c Biochemistry of metamorphosis. Same species as b (with M. SPIEGEL) 

 d Ultrastructure of metamorphosis. Same species as b (with M. SPIEGEL) 

 SPIEGEL, M. Ph.D., Prof. — Dept. of Biol. Sci., Dartmouth Coll., HANOVER, N.H. 

 03755, U.S.A. • 



a Protein changes in development. Arbacia punctulata, Lytechinus pictus. Strong ylocentrotus 



purpuratus (Echinoidea), Rana pipiens, R. catesbeiana (Anura) (with E. S. SPIEGEL) 

 b Role of enzyme induction in development. Rana pipiens, R. catesbeiana (Anura) (with 



E. S. SPIEGEL) 

 c Ultrastructure of metamorphosis. Same species as b (with E. S. SPIEGEL) 

 d Biochemistry of metamorphosis. Same species as b (with E. S. SPIEGEL) 

 SPINELLI, Miss M. M. G. Dent. — Lab. de Zool., Inst, de Rech. Biol.. Univ. Scient. et 



Med. de Grenoble, Cedex 53, 38 GRENOBLE, France 

 a Ultrastructure and differentiation of dental buds. Rana temporaria, Bufo bufo (Anura) 

 SPIRIN, A. A. Prof. — Inst, of Biochem., Acad, of Sci. of the U.S.S.R., MOSCOW, 

 U.S.S.R. • 



SPIRITO, A. Dott, Prof. — 1st. di Biol. Gen., Fac di Med., Univ. di Roma, Policlinico 

 Umberto I, 00100 ROMA. Italy • 



SPIROFF, B. E. N. Ph.D. — Dept. of Biol., Loyola Univ., 6525 N. Sheridan Rd., CHICAGO, 



111. 60626, U.S.A. 

 a Effects of thalidomide on development. (Aves) 

 b Function and structure of the epiphysis. (Aves) 

 c Lymphocytes and epiphysis. (Aves) 

 SPORNITZ, U. M. — Abt. Anat., Med. Fak., Rhein.-Westf. Techn. Hochschule, Alter 



Maastrichter Weg 1,51 AACHEN, W.Germany 

 a Vitellogenesis and early degeneration of eggs. (Amphibia) 



170 



