Rus-Sal 



a. The activation impulse in fertilization and artificial parthenogenesis. 

 (Echinoidea) 



b. Fine cell structure and cell division (Echinoidea) 



c. The bilateral organization of the egg. (Echinoidea) 



d. The role of the animal-vegetal balance in development; the character 

 and mode of action of vegetal agents, (Echinoidea) 



RUSSO-CAIA, S. Prof.Inc. — Lab. di Istol. ed Embriol., Fac. di Scienze, 

 Univ. di Roma, ROMA, Italia 



a. Biochemistry of development. (Aves; Mammalia) 



b. Biochemistry of metamorphosis. Musca domestica (Diptera) 



c. Cytochemical and autoradiographic investigations on the larval fat body. 

 Musca domestica (Diptera) 



d. Cytochemical and autoradiographic investigations on oogenesis. Ante- 

 don spec. (Crinoidea, Echinodermata), Dytiscus spec. (Coleoptera) 



RUTH, R.F. Ph.D. — Dept. of Zool., Univ. of Alberta, EDMONTON, 

 Alberta, Canada 



a. Immunogenetic analysis of graft rejection and graft-versus-host reac- 

 tions in the very young animal. Gallus gallus (Aves) 



b. The origins of the immunoglobulins. Gallus gallus (Aves) 



c. Origin of the immunologically competent cell. Gallus gallus (Aves) 

 RUTSCHKY, C.W. Ph.D.. Prof. — Dept. of EntomoL, 317 Frear Lab., 



Pennsylvania State Univ., UNIVERSITY PARK, Pa. 16802, U.S.A. 

 RYCHTER, Z. MUDr. — Dept. of Anat., Charles Univ., U nemocnice 3. 

 PRAHA 2, Czechoslovakia 



a. Experimental morphology of the aortic arches of the heart loop. Gallus 

 domesticus (Aves) 



b. Experimental analysis of cardiovascular anomalies. Gallus domesticus 

 (Aves) 



c. Embryonic microhaemodynamics. Gallus domesticus (Aves) 

 RYCZKOWSKI, M. Dr. — Dept. of Plant Physiol., Jagiellonian Univ., 



Grodzka 53. KRAK6W, Poland, 

 a. Physico-chemical properties of developing ovules. ( Monocotijledona, 



Dicotyledona, Angiosperma; Gymnosperma) 

 h. pH of developing embryos. (Plantae) 

 c. Osmotic value of the sap from embryos and endosperm during the 



development of ovules. (Plantae) 

 RZEHAK, K.F. Ph.D. — Dept. of Biol, and Embryol.. Acad, of Med., ul. 



Kopernika 7. KRAK6W, Poland. 



a. Neural competence of the ectoderm. Ambystoma mexicanum (Urodela) 



b. Cytokinesis in eggs. Xenopus laevis, Triturus alpestris (Amphibia) 



c. Stimulation of the regeneration process by blastemal tissue homogenates. 

 Ambystoma mexicanum (Urodela) 



SABBADIN, A. Dr., Prof. — 1st. di Zool., Anat. comp. e Genet., Fac. di Sci., 

 Via Loredan 10, PADOVA, Italia 



a. Gonad development; influence of hypophysectomy. (Amphibia) 



b. Genesis of pigments. (Botryllidae, Ascidiacea) 



SACARRAO. G. da FONSECA Dr.Sc, Prof. — Museu Bocage, Fac. of 

 Sci., LISBOA, Portugal 

 a. Development of the epistellar body. Octopus spec, Argonauta spec. 

 (Cephalopoda) 



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