Oka 67 Ors 



a. Limb induction. Hynobius tokyoensis (Urodela) 



b. Experimental induction of strobilization. Policitor mutabilis f,. Com- 

 pound" Ascidiae) 



c. Budding in various species, f', .Compound" Ascidiae) 



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

 Sci.. Kyoto Univ.. KYOTO, Japan. 



a. Developmental mechanism of entoderm differentiation. Triturus pyrrho- 

 gaster and Hynobius nebulosus (Urodela) 



b. Role of the yolk mass in early morphogenetic movement. Triturus pyr- 

 rhogaster and Hynobius nebulosus (Urodela) 



c. Regional differences of induced structure. 



OKAZAKI. Miss K. — Embryol. Section, Dept of Biol., Fac. of Sci., Tokyo 

 Metropolitan Univ., Meguro-ku, TOKYO, Japan, 

 a. Metamorphosis of partial larvae. Peronella (Clypeastroidea, Echinoidea) 

 h. A study of skeleton formation. ( Echinodermata) 

 OKSCHE, A. A. Dr Med. — Anat. Inst, der Univ., Robert Kochstr. 6. 

 MARBURG/Lahn, Deutschland. 



a. Aenderungen des Kaulquappen-Wachstums nach beiderseitiger Augen- 

 Extirpation. Es soil hierbei die Rolle des Hypophysen-Zwischenhirn- 

 Systems und der Epiphyse untersucht werden. Bufo vulgaris (Anura) 



b. Die Feinstruktur der Sinneszellen des Organon frontale bei quahtativ 

 und quantitativ modifiziertem Lichtreiz. Verhalten der spezifischen, mit 

 Eisen-Hacmotoxyhn farbbaren Zellstrukturen wahrend des Individual- 

 zyklus. Bu[o vulgaris (Larven) (Anura) 



OLIVO, O. M. Med. Dr, Ord. Prof. — 1st. di Istol. e Fisiol. gen.. Fac. di 

 Med., Via Belmeloro 8. BOLOGNA, Italia, 

 (no data received on Nov. 1^*, 1952) 

 OLSSON R. Fil.mag. — Zootom. Inst., Univ. of Stockholm. 116 Drottning- 

 gatan, STOCKHOLM. Sweden, 

 a. Development and anatomy of the nuclei and merve fibers in the brain. 

 Polypterus (Brachiopterygii) 

 OMODEO, P. Dr Sc, — 1st. di Biol, e Zool. gen., Fac. di Med.. Piazza 

 S. Agostino 4. SIENA. Italia. 

 a. Embryology and teratology. (Oligochaeta) 

 h. Gametogenesis and polyploidy. (Oligochaeta) 



c. Liver regeneration. (Urodela) 



OORT. J. — Lab. for Exper. Histol., Fac. of Med., Univ. of Leyden, 

 Wassenaarseweg. Boerhaavekwartier. LEIDEN, Holland, 

 a. Development of the anterior hypophysis. Larus ridibundus (Aves) 

 OPPENHEIMER. Miss J. M. B.A.. Ph.D. — Dept of Biol.. Bryn Mawr 

 Coll.. BRYN MAWR. Pa. U.S.A. 

 a. Experimental analysis of regional determination within the brain. Fun- 

 dulus heteroclitus (Teleostei) 

 ORLANDI, Miss A. Dott. Sci. Biol. — 1st. di Zool. e Anat. Comp., Univ. 

 di Milano, Via Celoria 10, MILANO, Italia, 

 a. Nucleoproteins and myosin. (Vertebrata) 



h. Nucleoproteins and chromosomes. (Arthropoda and Vertebrata) 

 ORSKA, Miss J. Ph.D. — Zaklad Anat. Porownawczej. Inst. Zool. Uniw.. 

 ul. Sienkiewicza 21. WROCLAW. Poland, 

 a. Development of the vertebral column centra. (Salmonidae and Cyprino- 

 dontidae, Teleostei) 



