Nishii 68 Okada 



NISHIITSUTSUJI. Miss J. — Lab. of Embryol. and Exper. Morphol., Zool. 



Inst., Dept of Sci., Kyoto Univ., KYOTO, Japan, 

 a. Hormonal mechanism of metamorphosis. Bombyx mod, Luehdorfia /a- 



ponica (Lepidoptera) and Lucilia (Diptera) 

 NIU M. C. Dr — Dept of Biol. Sci., Stanford Univ., STANFORD, Cal., 



U.S.A. 



a. The differentiation of macrophages into melanophores following their 

 ingestion of pigmentary debris released by degeneration of preexisting 

 melanophores. (Amphibia) (in collaboration with V. C. TWITTY) 



b. The transformation of differentiated xanthophores into typical melano- 

 phores. (Amphibia) (in collaboration with V. C. TWITTY) 



c. The differentiation of single isolated gastrula ectoderm cells cultured 

 under special conditions in vitro. (Amphibia) (in collaboration with 

 V. C. TWITTY) 



d. The migratory behaviour of single neural crest melanoblasts isolated in 

 capillary tubes of extremely small bore. (Amphibia) (in collaboration 

 with V. C. TWITTY) 



NOVIKOFF, A. B. Ph.D.. Prof. — Dent of Anat., Coll. of Med., Univ. of 



Vermont, BURLINGTON, Vt, U.S.A. 



(no data received over two years) 

 NUESCH, H. Dr Sc, P.D. — Zool. Anstalt dcr Univ., Rheinsprung 9, 



BASEL, Schweiz. 



(no data received over two years) 

 NYHOLM, K. G. Fil. Dr — Zool. Inst.. Uppsala Univ., UPPSALA. 



Sweden. 



a. Study of the development. (Echinoderidae, Aschelminthes) 



b. Study of the development. Labidoplax buskii (Echinodermata) 

 O'BRIEN. B. R. A. — Dept of Anat., The Univ. of Sydney, SYDNEY. 



N.S.W., Austraha. 

 a. Enzymatic pattern in normal and regenerating tissue in relation to ca- 

 pacity for, and rate of regeneration. (Annelida) 

 O'BRIEN, J. P. Ph.D. — Department of Biology, Marquette University, 

 1131 West V/isconsin Avenue. MILWAUKEE 3, Wisconsin, 

 U.S.A. 



a. Regeneration in limb portions situated in reversed proximodistal polarity. 

 (Urodela) 



b. State of determination of the hmb blastema. Triturus viridescens, Rana 

 pipiens and Amblystoma spp. (Amphibia) 



c. Experimental production of cancerous grovv'ths. (Urodela) 

 O'CONNOR, R. J. M.D., D.T.M. — Westminster Med. School, Horsferry 



Rd., LONDON S.W. 1, England (U.K.) 



a. The metabohsm of cell division and cell differentiation. (Vertebrata) 



b. Metabolic measurement during ontogenesis. (Aves) 



OKA, H. Ph.D., Prof. — Inst, of Zool., Univ. of Education, Otsuka-Kubo- 

 machi 24, Bunkyoku, TOKYO, Japan. 



a. Limb induction. Hynobius tokyoensis (Urodela) 



b. Experimental induction of strobilization. Polycitor mutabilis ("Com- 

 pound" Ascidiae) 



c. Budding in various species. ("Compound" Ascidiae) 



OKADA, T. — Lab. of Embryol. and Exper. Morphol., Zool. Inst., Dept of 

 Sci., Kyoto Univ., KYOTO, Japan. 



