NUSSBAUM, N. S. B.A., M.A., Ph.D. — Dept. of Biol.. Wright State 

 Univ., 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 (Teleostei) 

 NWAGWU. M. B.Sc. — Wenner-Gren's Inst, for exper. Biol.. Norrtulls- 

 qatan 16. STOCKHOLM Va., Sweden 

 a. Effects of chloramphenicol on the morphological and enzymatic differ- 

 entiation of developing systems. Xenopus laevis (Anura), Gallus 

 domesticus (Aves) 

 OBIKA. M. B.S., M.A., D.Sc. — Dept. of Biol, Keio Univ.. YOKOHA- 

 MA-Hiyoshi. Japan 

 a. Correlation between pigment formation and pterin derivatives during 



development. (Amphibia) 

 h. Experimental and electron microscopic studies on the cytodifferentia- 

 tion of chromatophores. Hynobius tokyoensis, H. nigrescens, Ambysto- 

 ma mexicanum. Tnturus pyrrhogaster, (Urodela) , Xenopus laevis, 

 Bufo vulgaris, Rana japonica (Anura) 

 O'BRIEN. B.'r. a. B.Sc. Ph.D. — School of Anat.. Univ. of New South 

 Wales. SYDNEY. N.S.W.. Australia 

 a. The effect of some non-ionic surface-active agents on the development 

 of the embryo in vitro (particularly cell movement). Gallus do- 

 mesticus (Aves) 

 ODA. S. D.Sc. Prof. — Biol. Lab.. St. Paul's Univ.. Ikebukuro. TOKYO. 

 Japan 

 a. Germination of statoblasts. Lophopodella carted (Phylacfolaemata, 

 Bryozoa) 

 O'FARRELL. A. F. B.Sc. A.R.C.S.. Prof. — Dept. of Zool.. Univ. of 

 New England. ARMIDALE 5 N.. N.S.W.. Australia 

 a. Regeneration and the endocrine .system. Blattella qermanica (Dictuov 

 tera. Insecfa) (in collaboration with A. STOCK and Miss J. MORGAN) 

 OGAWA. T. D.Sc — Biol. Inst.. Fac of Sci., Nagoya Univ.. Chikusa-ku, 

 NAGOYA. Japan 

 a. Serological studies on lens regeneration and lens formation. Trifurus 

 niirrhoqaster (Urodela) 

 OGAWA-MATSUDA. Mrs. N. D Sc — Biol. Inst.. Fac of Sci., Nagoya 

 Univ.. Chikusa-ku. NAGOYA. Japan 



a. Studies of the "fused" mutant. Onjzias latipes (Teleostei) 



b. Genetical studies of hatching enzymes and mechanisms controlling their 

 secretion. Onjzias latipes (Teleostei) 



OGREN. R. E. A.B.. M.S.. Ph.D. — Dept. of Biol., Wilkes Coll.. WILKES- 

 RARRE, Pa. 18703. U.S.A. 



a. Embryonic development (maturation, cleavage). Hymenolepis diminuta 

 fCtjclophyllidae, Cestodes) 



b. Structure and development of hexacanth embryos (oncospheres). Hyme- 

 nolepis diminuta (Cyclophyllidae, Cestodes) 



c. Differentiation of hooks in oncoblasts of immature embryos. Hymeno- 

 lepis diminuta (Cyclophyllidae, Cestodes) 



d. Differentiation and movement of embryonic myoblasts. Hymenolepis 

 diminuta (Cyclophyllidae, Cestodes) 



151 



