• RUNNSTROM, J. A. M. M.D., Ph.D., Prof.(Emer.) — Wenner-Gren's Inst, for exper. 



Biol.. Norrtullsgatan 16, STOCKHOLM Va, Sweden 

 a The activation impulse in fertilization and artificial parthenogenesis. (Echinoidea) 

 h Fine cell structure. (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) 

 e Extraction and fractionation of animalizing and vegetalizing substances. Paracentrotus 



lividus (Echinoidea) (in collaboration with S. HORSTADIUS, Uppsala) 

 RUSAOUEN, Mrs. M. Dr. — Lab. de Zool., Fac. des Sci. de Grenoble, Domaine Universi- 



taire, 38-SAINT-MARTIN-dHERES, France 

 a Skin and hair morphogenesis in chorioallantoic grafts, in grafts into the Hamster cheek 



pouch, and in organ cultures. Mus musculus, Mesocricetus auratus (Rodentia) 

 b Ultrastructural changes during skin and feather-germ morphogenesis. Callus domesticus 



(Aves) 

 RUSCH, H. P. M.D., Prof. — McArdle Lab. for Cancer Research, Med. School, Univ. of 



Wisconsin, MADISON, Wis. 53706, U.S.A. 

 a Biochemical events associated with sporulation (differentiation). Physarum polycephalum 



(Myxomycetae) 

 RUSSO-CAIA, S. Prof.Inc. — Lab. di Istol. ed EmbrioL, Fac. di Sci., Univ. di Roma, ROMA, 



Italia 

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



Alta., Canada 

 a Immunogenetic analysis of graft rejection and graft-versus-host reactions in the very 



young animal. Gallus gallus (Aves) 

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

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

 d Immunofluorescent localization of transplantation antigens in the developing animal. 



Gallus gallus (Aves) 

 e The histologic and metabolic maturation of the primordia of the lymphoid system. Gallus 



gallus (Aves) 

 RUTSCHKY, C. W. Ph.D., Prof. — Dept. of Entomol., 317 Frear Labs., Pennsylvania 



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

 RYABININA, Miss Z. A. Cand.biol.sci. — Inst, of Exper. Biol., Acad, of Med. Sci. of the 



U.S.S.R., Baltiyskaya St. 8, MOSCOW A-315. U.S.S.R. 

 a Study of cytological and histochemical mechanisms of regenerating liver. Mus musculus, 



Rattas norvegicus (Rodentia) 

 RYCHTER, Z. MUDr. — Dept. of Histol., Charles Univ., U nemocnice 3, PRAHA 2, 



Czechoslovakia 

 RYCZKOWSKI. M. Dr. — Dept. of Plant Physiol., Jagiellonian Univ., Grodzka 53, KRA- 

 KOW, Poland 

 a Physico-chemical and physiological properties of the developing ovule and embryo. 



(Monocotyledona, Dicotyledona, Angiosperma; Gymnosperma) 



1. Osmotic gradients in the developing ovule and embryo (theroelectric method) 



2. Changes in the osmotic value of the sap surrounding the developing embryo (theroelec- 

 tric method) 



3. Physiological activity of the sap surrounding the developing embryo (Avena test) 



4. pH of the developing embryo and the surrounding sap (RIM method) 



RYLAND, J. S. Ph.D. — Dept. of Zool., Univ. Coll. of Swansea, Singleton Park, SWAN- 

 SEA, Glamorganshire, Wales, U.K. 



a Effect of environmental factors on embryonic and larval development. Pleuronectes platessa 

 (Teleostei) 



RZEHAK, K. Ph.D. — Dept. of Biol, and Embryol., Acad, of Med., ul. Kopernika 7. KRA- 

 KOW, Poland 



a Quantitative neurobiological studies of regeneration. (Amphibia) 



b Stimulation of the regeneration process by blastemal tissue homogenates. Ambystoma 

 mexicanum (Urodela) 



c Cytokinesis in eggs. Xenopus laevis, Trifurus alpestris (Amphibia) 



SAAG, P. Th. M. van der M.Sc. — Hubrecht Lab. (Intern. Embryol. Inst.), Uppsalalaan 1, 

 Universiteitscentrum "De Uithof", UTRECHT, Netherlands 



a Patterns of nucleic acid and protein synthesis associated with neural and endo-mesodermal 

 competence in the blastula/gastrula stage. Ambystoma mexicanum (Urodela) 



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

 10, PADOVA, Italia 



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

 Portugal 



H Development of the epistellar body. Octopus spec, Argonauta spec. (Cephalopoda) 



h Development of the statocyst. (Cephalopoda) 



c Blastokinesis. Tremoctopus violaceus (Cephalopoda) 



130 



