O'brien-Ort 



c. Effect of abnormal RNA on haemoglobin synthesis. Gallus domesticus 

 (Aves) 



O'BRIEN, J. P. Ph.D. — Dept. of Biol., Marquette Univ., 1217 West Wis- 

 consin Ave., MILWAUKEE 3, Wis., U.S.A. 



OBRUcNlK, M. MUDr., C.Sc. — Inst, of Histol. and Embryol., Fac. of 

 Med., Palacky Univ., Fierlingerova ul., OLOMOUC, Czechoslovakia 

 (no embryological work in progress) 



OELHAFEN, F. H. Dipl.Zool. — Zool.-vergl. Anat. Inst., Naturw. Fak., 

 Univ. Zurich, Kiinstlergasse 16, ZURICH, Schweiz 



O'FARRELL, A. F. B.Sc, ARCS — Dept. of Zool., Univ. of New England, 

 ARMIDALE 5 N, N.S.W., Australia 

 a. Regeneration and the endocrine system. Blattella germanica (Dictyoptera, 

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



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

 LISLE, Pa., U.S.A. 



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

 (Cyclophyllidae, Cestodes) 



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

 nolepis diminuta (Cyclophyllidae, Cestodes) 



c. Differentiation of hooks in oncoblasts of immature embryos. Hymenolepis 

 diminuta (Cyclophyllidae, Cestodes) 



d. Differentiation and movement of embryonic myoblasts. Hymenolepis 

 diminuta (Cyclophyllidae, Cestodes) 



OHNO, S. — Biol. Inst., Fac. of Sci., Nagoya Univ., Chikusa-Ku, NAGOYA, 



Japan 

 a. Biochemical analysis of embryonic polysaccharides. Triturus pyrrho- 



gaster (Urodela) (in collaboration with K. TAKATA, Berkeley) 

 OIKAWA, Miss I. B.Sc. — Fac. of Education, Kochi Univ., KoCHI, Japan 

 OKA, H. Ph.D., M.I. I.E., Prof. — Inst, of Zool., Univ. of Education, 



Otsuka-Kubo-machi 24, Bunkyo-ku, TOKYO, Japan 



a. Metamorphosis of compound forms. Perophora japonica (Ascidia) 



b. Colony-specificity and selective fertilization in compound forms. Botryllus 

 primigenus (Ascidia) (in collaboration with H. WAT AN ABE) 



c. Regulation in the developing egg. Tachypleus tridentatus (Xiphosura, 

 Merostomata) (in collaboration with K. SEKIGUCHI) 



OKADA, T. S. M.Sc, D.Sc, M.I.I.E. — Lab. of Embryol. and Exper. 

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



a. Immunological studies on the synthesis of tissue proteins in embryos. 

 Gallus domesticus (Aves) 



b. Differentiation of embryonic cells cultured in vitro, with special 

 reference to the uptake of protein or RNA. Triturus pyrrhogaster (Uro- 

 dela), Gallus domesticus (Aves) (in collaboration with K. TAKATA, 

 Berkeley, and T. YAMADA, Oak Ridge) 



OKADA, Y. K. M.J.A., Dr., F.I. I.E., Prof . — Nat. Museum of Nat. Sci., 

 Ueno-Park, Daito-ku, TOKYO, Japan 



a. Sex-conversion. (Sparidae, Teleostei) 



b. Determination of sex-reversible period. Oryzias latipes (Teleostei) 

 OKAZAKI, Miss K. Dr., M.I.I.E. — Embryol. Section, Dept. of Biol., Fac. 



of Sci., Tokyo Metropolitan Univ., Setagaya-ku, TOKYO, Japan 

 a. Radioautographic study of calcium deposition. Pseudocentrotus depressus, 

 Hemicentrotus pulcherrimus (Echinoidea) 



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