a. Problems of growth and development with particular reference to the 

 biochemistry of differentiation. 

 NIWELlNSKI, J. M. Ph.D. — Dept. of Biol, and Embryol., Acad, of Med., 

 ul. Kopernika 7, KRAK6W, Poland 



a. Enzymatic background of the regeneration process. Triturus spec, 

 Xenopus laevis (Amphibia) 



b. /^-glucuronidase activity in transplanted regeneration blastemas. Ambys- 

 toma mexicanum (Urodela) 



NOBILI, R. Dr.Biol.Sci. — 1st. di Zool. e Anat. comp. dell'Univ., Via A. 



Volta 4. PISA, Italia 

 a. Reproduction and cytology. (Ciliata) 

 NOGAMI, H. M.D. — Research Inst, of Environmental Med., Nagoya 



Univ., Furo-cho, Chikusa-ku, NAGOYA, Japan 

 a. Digital malformations in the embryo caused by X-radiation. Mus muscu- 



lus (Rodentia) (in collaboration with U. MURAKAMI and Y. KA- 



MEYAMA) 

 NOLTE, H. v. d. V. B.Sc. — Dept. of Zool., Fac. of Sci., Univ. of Pretoria, 



PRETORIA, Republic of South Africa 

 a. An experimental investigation of the influence of epidermal placodes on 



the development of the cranial nerves. Xenopus laevis (Anura) 

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



cho, MAEBASHI, Japan 

 NORMAN, C. B.S., M.S., Ph.D., Prof. — Dept. of Biol., West Virginia Univ., 



MORGANTOWN, 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) 



d. Physiology and biochemistry of germ cells. (Mammalia) 



e. Physiological and biochemical basis of cell senescence. 

 N0RREVANG, A. M.Sc. — Inst, of Comp. Anat., Universitetsparken 3, 



COPENHAGEN 0, Denmark 



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

 WINGSTRAND) 



b. Oogenesis (histological, histochemical and ultrastructural). Pviapulus 

 caudatus (Priapulida) 



NOTARNICOLA, Mrs. L. CIRILLO Dr.Nat.Sci. — 1st. di Istol. ed Em- 

 briol., Fac. di Sci., Universita di Perugia, PERUGIA, Italia 



a. Correlations between nervous system and limbs. (Anura) 



b. Limb induction. (Amphibia) 



NOTHIGER, R. Dipl.Sc.Nat. — Zool.-vergl.Anat. Inst., Naturwiss. Fak., 

 Univ. Zurich, Kiinstlergasse 16, ZURICH, Schweiz 

 a. Determination and pattern formation in imaginal discs as investigated by 

 disaggregating and mixing the cells of two discs of different mutants, seg- 

 ments, sex, and species. Drosophila melanogastev , D. seguyi (Diptera) 

 NOUMURA, T. N. D.Sc. — Misaki Marine Biol. Station, Univ. of Tokyo, 

 MISAKI, Kanagawa-ken, Japan 

 a. Development of the endocrine system in the embryo and its relation to the 

 maternal system. Rattus spec. (Rodentia) 



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