Rostand 79 Sala 



c. Modifications des noyaux au cours de I'ontogenese. (Amphibia) 



d. Survie de I'ovule in vitro, a basse temperature. (Amphibia) 

 ROTHFELS, U. Ph.D. — Div. of Chem. Embryol., Med. Center, Univ. of 



Colorado, 4200 East Ninth Ave. DENVER 20, Col. U.S.A. 



a. Study of differentiation of somites in explants (Spratt technique). Gal- 

 lus (Aves) (in collaboration with H. HERRMANN) 



b. Study of developmental disturbances related to nutritional deficiencies 

 investigated by application of anti-vitamins and anti-amino acids to the 

 intact egg and to explants (somites). (Aves) (in collaboration with 

 H. HERRMANN) 



ROZEWSKA. Miss J. W. Physician — Inst, of Histol. & Embryol., Acad, 

 of Med., Narutowicza 60, LODZ, Poland Gallus (Aves) 



a. Influence of sulphonamides on the development of germinal layers. 



b. Influence of sulphonamides on the size of embryos. Gallus (Aves) 

 RUDEWICZ, Mrs Cz. Physician — Inst, of Histol. & Embryol., Acad, of 



Med., Narutowicza 60, LODZ. Poland 



a. Influence of sulphonamides on the structure of cell nuclei. Gallus (Aves) 



b. Influence of sulphonamides on the size of embryos. Gallus (Aves) 

 RUDNICK, Miss D. Ph.D. — Osborn Zool. Lab., Yale Univ., NEW 



HAVEN 11, Conn. 



— Dept of Pharmacol., the N.Y. Psychiatric Inst., 722 W. 168 St, 

 NEW YORK 32, N.Y., U.S.A. 

 a. Protein-synthesising mechanisms in development. Gallus (Aves) 

 RUGH, R. A.B., M.A., Ph.D. — Radiological Research Lab., Dept of 

 Radiology, Coll. of Physicians & Surgeons, Columbia Univ., 630 West 

 168th Str., NEW YORK 32, N.Y., U.S.A. 



a. Radiobiology. 



b. Experimental Embryology. 



c. Effect of ionizing radiations on the fetus. 



RUNNER, M. N. Ph.D. — Roscoe B. Jackson Mem. Lab., BAR HARBOR, 



Me, U.S.A. (no data received on Nov. 1=', 1953) 



RUNNSTROM, J. A. M. F.I.I.E., Ph.D., M.D., Prof. — Wenner-Grens 



Inst, for experimental Biology, Norrtullsgatan 16, STOCKHOLM Va., 



U.S.A. (no data received on Nov. 1^', 1953) 



RUUD, Miss G. Cand. real. — Zool. Lab., Univ. of Oslo, OSLO-BLIN- 



DERN, Norway 

 a. Anatomical investigation of forelimbs transplanted to the hindlimb region 



in embryos. Ambystoma mexicanum (Utodela) 

 RYKE, P. A. J. M.Sc, Ph.D. — Dept van Dierkunde, Potchefstroom Univ., 



POTCHEFSTROOM. Suid-Afrika 



(no data received on Nov. 1=', 1953) 

 SABBADIN, A. Dr — 1st. di Zool. e Anat. Comp., Fac. di Sci., Via 



Loredan 6, PADOVA. Italia 



a. Differentiation of gonads. (Amphibia) 



b. Sex differentiation. (Ascidiae) 



SACERDOTE, Miss M. Dr — Inst, of comp. Anat., Via Giovanni Giohtti 

 34, TORINO, Italy (no embryological work in progress) 



SALA, M. Dr — 1st. di Zool. e Anat. Comp., Fac. di Sci., Via Loredan 6, 

 PADOVA, Italia 

 a. Neurogenesis. (Amphibia) 



