O'BRIEN, B. R. A. Ph.D., Prof. — Sch. of Anat, Univ. of New South Wales, P.O.Box 1, 



KENSINGTON. N.S.W. 2033, Australia 

 ODA, S. D.Sc, Prof. — Biol. Lab., Coll. of Gener. Educ, St. Paul's Univ., 3 Nishi-Ikebukuro, 



Toshima-ku, TOKYO, 171 Japan 

 a Germination of statoblasts. Lophopodella carteri (Phylactolaemata, Bryozoa) 

 O'DELL, D. S. Ph.D. — . Dept. of Zool. and Comp. Anat., Univ. Coll. London, Gower St., 



LONDON WC1E 6BT, England 

 a First formation of antigens coded for by the paternal pronucleus in merogones and inter- 

 specific hybrids (immunofluorescence and other methods). Paracentrotus lividus, Acbacia 

 lixula (Echinoidea) 

 b Biochemistry of the transitions between the amoeboid and the flagellate stages. Naegleria 



gruberi (Rhizopoda) 

 O'FARREL, A. F. A.R.C.S., Prof. — Dept. of Zool., Fac. of Sci., Univ. of New England, 



ARMIDALE. N.S.W. 2351, Australia 

 OGREN, R. E. Ph.D. — Dept. of Biol., Wilkes Coll., WILKES-BARRE, Pa. 18703, U.S.A. 

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

 b Structure and development of hexacanth embryos (oncospheres). Same species as a 

 c Differentiation and movement of embryonic myoblasts. Same species as a 

 OHASHI, Miss S. — Embryol. Sect., Dept. of Biol., Tokyo Metropolitan Univ., 2-1-1 chome, 



Fukazawa-machi, Setagaya-ku, TOKYO, 158 Japan 

 a Cell differentiation. (Echinoidea) 



OHASHI, T. M.Sc. — Dept. of Anat., Mie Pref. Univ., 2-174, Edobashi, TSU, Japan 

 a Developmental mechanism of the central and peripheral nervous system. Hynobius 



nebulosus (Urodela) 

 OHNO, S. Ph.D., D.Sc. — Dept. of Biol., City of Hope Med. Center, 1500 E. Duarte Rd., 



DUARTE, Calif. 91010, U.S.A. 

 OHSAKI, K. — Biol. Inst., Fac. of Sci., Univ. of Kanazawa, Marunouchi-1, KANAZAWA, 



Japan 

 a Development of egg. Dugesia japonica (Turbellaria) 

 b Reaggregation of dissociated cells. Callyspongia elongata (Porifera) 

 OJEDA SAHAGUN, J. L. Dr.en Med., Prof. — Serv. de Embriol. Exper., Cat. de Anat., 



Univ. de Valladolid, VALLADOLID, Spain 

 a Biochemical and ultrastructural effects of barbituric compounds on the embryo. Gallus 



domesticus (Aues) 

 b Effect of peripheric innervation area on cellular kinetics in the central nervous system 



(autoradiography). Same species as a 

 OJIMA, Y. D.Sc, Prof. — Dept. of Biol., Kwansei Gakuin Univ., Uegahara 1, NISHINO- 



MIYA, Hyogo-ken 662, Japan 

 a Developmental genetics. Carassius auratus, Cyprinus carpio (Teleostei) 

 b Developmental cytogenetics. Freshwater species and hybrids (Teleostei) 

 OKA. H. Ph.D., Prof.(Emer.) — Inst, of Zool.. Tokyo Kyoiku Univ., Otsuka 3-29-1, 

 Bunkyo-ku, TOKYO, Japan • 



a Differential induction of metamorphic processes. Perophora orientalis (Ascidiacea) 

 b Laboratory culture. Clunio (sushimensis (Diptera) 

 OKADA, M. Ph.D. — Center for Pathobiol., Univ. of California, IRVINE, Calif. 92664, 



U.S.A. 

 a Effects of insect hormones on development (electron microscopy). Drosophila melano- 



gaster (Diptera) 

 OKADA. T. S. D.Sc, Prof. — Lab. of Cell Sci., Inst, of Biophys. and Molec Biol., Fac of 



Sci., Univ. of Kyoto, Sakyo-ku, KYOTO, Japan 

 a Factors affecting cell aggregation and cell contact. Gallus gallus (Aves) (with H. 



FUJISAWA and K. TAKAHASHI) 



b Stability in the differentiation of chondrocytes and lens epithelial cells in clonal cell 



culture. Gallus gallus (Aves), Mus bactrianus (Rodentia) (with G. EGUCHI and M. 



TAKEICHI) 



OKADA, Y. K. Dr., Prof.(Emer.) — Div. of Zool., Natl. Sci. Museum. Ueno Park, Daito-ku, 



TOKYO, Japan • 



OKAMOTO, M. — Lab. of Cell Sci., Inst, of Biophys. and Molec. Biol., Fac. of Sci., Univ. of 



Kyoto, Sakyo-ku, KYOTO, Japan 

 a Mechanisms of sorting out phenomena of the cells from different germ layers. Xenopus 



laeuis (Anura), Triturus pyrrhogaster (Urodela) 

 OKAZAKI. Miss K. D.Sc. — Embryol. Sect.. Biol. Dept.. Tokyo Metropolitan Univ., 2-1-1 

 chome, Fukazawa-machi, Setagaya-ku. TOKYO 158, Japan • 



a Mechanism of spicule formation. (Echinoidea) 

 b Myogenesis. (Aves; Mammalia) 

 OKKER-REITSMA, Mrs. G. H. Drs. — Lab. for Cell Biol, and Histol., State Univ., Rijns- 



burgerweg 10, LEIDEN, Netherlands 

 a Androgen production of placentae of different ages (bioindicator test, histochemistry, 

 chromatography) . Cavia porcellus, Mus musculus (Rodentia) 



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