Rotm 77 Sand 



f ROTMANN, E. Dr phil. nat.. Prof. — Inst. f. Entw.physiol., Kerpener- 

 str. 13, KOLN-Lindenthal, Deutschland. 



a. Regionale Induktion bei Amphibien. Triton 



b. Regeneration der Extremitat. Triton (Amphibia) 



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



HAVEN 11, Conn., U.S.A. 

 a. Histo- and cytogenesis of early embryonic tissues. Gallus (Aves) 

 RUGH, R. Dr, Prof. — Coll. of Phys. and Surg., Columbia Univ., NEW 



YORK City, N.Y., U.S.A. (no data received) 



RUNNER, M. N. Ph.D., Prof. — Roscoe B. Jackson Memorial Lab., Box 



558, BAR HARBOR, Me, U.S.A. (no data received over this year) 



RUNNSTROM, J. A. M. Ph.Dr, Med. Dr, Prof. — Wenner-Grens Inst. 



for exper. Biol., Norrtullsgatan 16, STOCKHOLM 23, Sweden. 



a. (Cf. work on the Institute). Physiology of fertilization and development 

 in Echinoderms. 



b. Analyzation of the nature of the egg antifertilizin. (Echinodermata) 

 (in collaboration with A. MONROY, Marine Biol. Stat., WOODS 

 HOLE, Mass., U.S.A.) 



RUSSEL, Miss E. S. A.B., M.A., Ph.D., Prof. — Roscoe B. Jackson Me- 

 morial Lab., Box 558. BAR HARBOR, Me, U.S.A. 

 (no data received over this year) 



RUSSO, Miss E. — Dept of Zool., Univ. of Chicago, CHICAGO 37, 111., 

 U.S.A. 

 a. Role of various tissue components in Urodele limb regeneration. Triturus 

 (Amphibia) (in collaboration with P. A. WEISS) 



RYKE, P. A. J. M.Sc. — Dept van Dierk., Potchefstroom Univ., POT- 

 CHEFSTROOM. Suid-Afrika. (stud: Sool. Inst., STELLENBOSCH) 



a. The ontogenesis of the dorsal myotomic (somatic) musculature of 

 Xenopus laevis. (Anura, Amphibia) 



b. The ontogenesis of skeleton and muscles of the trunk region of Xenopus 

 laevis. (Anura, Amphibia) (in collaboration with A. L. SMIT) 

 (Normal Table) 



SABBADIN, A. Dr — 1st. di Zool. e Anat. comp., Fac. di Sci., Via Lore- 

 dan 6, PADOVA, Italia, 

 a. Determination of gonads. (Amphibia) 

 SACERDOTE, Miss M. Dr — Inst, of Comp. Anat., Via Giovanni Giolitti 

 34, TORINO, Italy, 

 a. Bilateral and unilateral removal of the ear vesicle to analyse the develop- 

 mental relationships between the latter and the lime sacs. Rana esculenta, 

 Bufo vulgaris (Amphibia) (in collaboration with A. GUARDABASSI) 

 SALZGEBER, Mile B. Lie. es Sc. — Lab. de Zool. de la Fac. des Sci. et 

 Lab. d'Embryol. et Teratol. exper. du C.N.R.S., Institut de Zool. et 

 de Biol, generate, 12, Rue de l'Universite, STRASBOURG, France, 

 a. Recherches sur Taction d'agents physiques et chimiques sur la dif- 

 ferentiation sexuelle. 



Recherches sur l'intersexualite experimental produite par irradiation 

 aux rayons X. (Aves) (En collaboration avec Et. WOLFF) 

 SANDISON. Miss E. E. B.Sc. — Dept of Zool., Univ. of Cape Town. 

 RONDEBOSCH, South Africa. (Leaving in August 1950) 

 a. The identification of the larvae of some South African Barnacles with 

 notes on their life histories. (Cirripedia, several species). 



