N0RREVANG. A. D.Sc. — Inst, of Comp. Anat.. Universitetsparken 15, COPENHAGEN 



O, Denmark 

 a Embryology. Armillifer spec. (Linguatulida) (in collaboration with K. G. WING- 

 STRAND) 

 b Oogenesis (histological, histochemical and ultrastructural). Priapulus caudatus (Priapulida) 

 c Early embryology. (Pogonophora) 

 NORSTOG, K. J. Ph.D., Prof. — Dept. of Biol. Sci., Northern Illinois Univ., DeKALB, 



111. 60115, U.S.A. 

 a Development of cultured tissues. Cycadales and other spp. (Gymnospermae), cereals and 



other spp. (Angiospermae) 

 b Embryology (tissue culture and electron microscopy). Hordeum vulgare (Gramineae) 

 NOTO, T. Dr.Sci. — Dept. of Biol., Miyazaki Univ., MIYAZAKI, Japan 

 a Tissue transformations in isolated pieces of early blastoderm, caused by RNA extracted 



from 10-day embryos, pretreated with actinomycin D. Gallus domesticus (Aves) 

 b Theoretical considerations on possible mechanisms of genetical differentiation 

 NOUMURA, T. D.Sc. — Div. of Endocrinol., Natl. Cancer Center Research Inst., Tsukiji 



5-chome, Chuo-ku, TOKYO, Japan 

 a Identification of embryonic gonadal hormones in sex differentiation. Gallus spec. (Aves), 



Rattus spec. (Rodentia) 

 b Mechanism of gamete-shedding by the product of radial nerves. Asterias amurensis. Aster- 



ina pectinifera { Asteroidea, Echinodermata) 

 c Mechanism of hormone action on developing genital systems. Gallus spec. (Aves), Rattus 



spec. (Rodentia) 

 NOVAK, V. J. A. D.Sc. — Dept. of Physiol., Inst, of Entomol., Czechoslov. Acad, of Sci., 



Na Folimance 5, PRAHA 2, Czechoslovakia 

 NOVEL, G. Lic.es Sci. — Lab. de Zool., Fac. des Sci. de Grenoble, Cedex 53, 38 



GRENOBLE, France 

 a Experimental analysis of the role of epidermal feather placodes and dermal feather con- 

 densations in the formation of the feather. Gallus domesticus (Aves) 

 NOWAK6WNA, Miss J. D.Sc. — Zaklad Zool. Ogolnej, Inst, of Zool., Univ. of Wroclaw, 



ul.Sienkiewicza 21, WROCZ-AW, Poland 

 a Cytological studies in larval development. Triturus cristatus, T. vulgaris, T. alpestris, 



T. montandoni (Urodela) 

 NOYES, G. S. B.A. — Ira C. Darling Center for Research, (Marine Lab.), Univ. of Maine, 



WALPOLE, Me. 04573, U.S.A. 

 a Metamorphosis, gametogenesis and oogenesis. Aglaophamus spec. nov. (Nephfyidae, Poly- 



chaeta) 

 NOYES, R. W. M.D., Prof. — Dept. of Anat., Univ. of Hawaii, 1951 East-West Rd., 



HONOLULU, Hawaii 96822, U.S.A. 

 a Tubal transport of spermatozoa and ova. (Mammalia) 

 NUESCH, H. Dr.sci.nat., Prof. — Zool. Anstalt der Univ., Rheinsprung 9, 4000 BASEL, 



Switzerland 

 NUMANOI. H. Ph.D., Prof. — Biol. Lab., School of Educ, Waseda Univ., Tozuka, 



Shinjuku-ku, TOKYO, Japan 

 NUSSBAUM, N. S. Ph.D. — Dept. of Biol., Div. of Sci. and Engin., Wright State Univ., 



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

 a Hormonal aspects of mineralization as studied in hypophysectomized, mature animals 



(using regenerating scales as test objects). Carassius auratus, Fundulus heteroclitus (Tele- 



ostei) 

 h Electron micrographic aspects of scale regeneration in non-juvenile animals (autoradio- 

 graphy and cytochemical techniques applied at ultrastructural level). Carassius auratus 



(Teleostei) 

 OBERLANDER, H. Ph.D. — Dept. of Biol., Brandeis Univ., WALTHAM, Mass. 02154, 



U.S.A. 

 a Cellular aspects of the hormonal control of metamorphosis. Galleria mellonella (Lepi- 



doptera). Drosophila melanogaster (Diptera) 

 b Developmental behavior of imaginal discs in vivo and in vitro. Galleria mellonella 



(Lepidoptera), Drosophila melanogaster (Diptera) 

 OBIKA, M. D.Sc. — Dept. of Biol.. Keio Univ., YOKOHAMA-Hiyoshi, Japan 

 a Correlation between pigment formation and pterin derivatives during development. (Am- 



phibia) 

 h Experimental and electron microscopic studies on the cytodifferentiation of chromatophores. 



Hynobius tokyoensis, H. nigcescens. Ambystoma mexicanum, Triturus pyrrhogaster (Uro- 



dela), Xenopus laevis, Bufo vulgaris, Rana japonica (Anura) 

 OBINATA, T. M.Sc. — Biol. Inst., Coll. of Gen. Educ, Univ. of Tokyo, Komaba, Meguro- 



ku, TOKYO. Japan 

 O'BRIEN, B. R. A. Ph.D.. Prof. — School of Anat., Univ. of New South Wales, P.O. 



Box 1, KENSINGTON, N.S.W. 2033, Australia 

 a Development and augmentation of intracellular enzyme proteins in cultured cells in the 



presence of extraneous DNA and RNA preparations. Mus musculus (Rodentia) 



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