Nissen-Oik 



a. Elektronenmikroskopische Untersuchungen des melanoblastischen Pig- 

 ments in der Feder des normalen und albinotischen Tieres. Melopsittacus 

 undulatus (Aves) 

 NIU, M. C. Ph.D., M.I.I. E. — Rockefeller Inst, for Med. Research, 66th St. 

 and York Ave., NEW YORK 21, N.Y., U.S.A. 

 a. In vitro study of protein formation during embryonic differentiation. 

 Various spp. (Urodela) 

 NOBILI, R. — 1st. di Zool. e Anat. comp. dell'Univ., Via A. Volta 4, PISA, 

 Italia 

 a. Reproduction. (Tricladidea, Turbellaria) 

 NONAKA, T. B.M., M.D. — Inst, of Endocrinol, Gunma Univ., Iwagami- 

 cho, MAEBASHI, Japan 



a. Experiments on metamorphosis. Bufo vulgaris formosus, Rana japonica 

 (Anura) 



b. Micro-spectro-photometrical studies of primordial thyroid and hypophy- 

 sis. Bufo vulgaris formosus, Rana catesbiana (Anura) 



NORBERG, O. V. O.Dr., Prof. — Dept. of Histol., Karolinska Inst., Solna- 

 vagen 1, STOCKHOLM 60, Sweden 

 a. A study of teeth and jaws during the first years of life. Homo sapiens 

 (Primates) 



NORDLING, E. G. V. Fil.mag. — Inst, of Zoophysiol., Univ. of Uppsala, 

 UPPSALA, Sweden 

 a. The mechanism of agglutination of spermatozoa. (Mammalia) (in colla- 

 boration with P. E. LINDAHL, N.-O. BODIN, L. O. THUNQVIST, 

 R. L. BRATTSAND and G. UHLIN) 



NORMAN, C. Ph.D. — Dept. of Biol., W. Virginia Univ., MORGAN- 

 TOWN, W.Va., U.S.A. 



a. The intracellular distribution of sulfhydryl groups in embryonic, adult 

 and tumorous tissues. Rana pipiens (Anura) 



b. Effects of pH on the metabolism and fertilizing capacity of spermatozoa 

 cultured in vitro. (Mammalia) 



c. Effects of light on spermatozoa. (Mammalia) 



NOVAK, V. J. A. D.S. — Biol. Inst, of the Czechoslovak Acad, of Sci., 



Na cvicisti cislo 2, PRAHA 6, Czechoslovakia 

 a. The function of the hormones of metamorphosis. Bombyx mod (Lepidop- 



tera) , Pyrrhocoris apterus (Heteroptera) 

 NOWAK, A. Lek.med. — Chair of Gener. Biol., Silesian Acad, of Med., 



Rokitnica, ZABRZE 8, Poland 



(no embryological work in progress) 

 NOWAK6WNA, Miss J. M.Ph. — Zaklad Zool. Ogolnej, Inst. Zool., 



Uniw. we Wroclawiu, ul. Sienkiewicza 21, WROCLAW, Poland 



a. The morphogenetical functions of the thyroid gland and hypophysis. 

 (Amphibia, Reptilia, Aves) 



b. Pigmentation and the endocrine glands. (Amphibia) 



NUESCH, H. D.Sc, Prof. — Zool. Anstalt der Univ., Rheinsprung 9, BA- 

 SEL, Schweiz 



a. Einfluss des Nervensystems auf die Entwicklung anderer Organe. Telea 

 polyphemus (Saturniidae, Lepidoptera) 



b. Entwicklung der imaginalen Muskeln. (Neuroptera, Lepidoptera) 



c. Entwicklung des Nervensystems. (Insecta) 



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