RONCORONI. G. Dott.Med. — Cattedra di Istol. ed Embriol. gener., Fac. 



di Med. e Chir. dell'Univ. di Milano, Via Ponzio 7, MILANO, Italia 

 ROOFE, P. G. Ph.D., Prof.— Dept. of Anat., Med. School, Univ. of Kansas. 



LAWRENCE, Kansas, U.S.A. 

 ROOSEN-RUNGE, E. C. M.D. — Dept. of Biol. Struct.. School of Med., 



Univ. of Washington, SEATTLE 5, Wash., U.S.A. 

 ROSE. S. M. B.A., M.A., Ph.D., M.I. I.E., Prof. — Dept. of Anat., Tulane 



Univ., NEW ORLEANS 18, La., U.S.A. 



a. Recovery of regenerative ability after x-irradiation and grafting of nor- 

 mal tissues. Triturus viridescens (Urodela) 



b. Electrophoretic separation of controlling substances operating in a polarized 

 field. Tubularia crocea (Hydroidea) 



ROSIN, S. Dr., Prof. — Zool. Inst, der Univ. Bern, Sahlistr. 8, BERN, 



Schweiz 

 ROSS (McALLISTER), Mrs. J. R. W. B.Sc, M.B., Ch.B. — Dept. of Anat., 



Charing Cross Hosp. Med. School, 62-65 Chandos Place, LONDON 



W.C. 2, England 

 a. The development of the genital tract. Ovis aries (Artiodactyla) 

 ROSSI. A. Dr. — 1st. di Anat. comp. "G. B. Grassi", Fac. di >Sei., Univ. di 



Roma, Via Borelli 50. ROMA, Italia 



a. Xenoplastic grafts. (Amphibia) 



b. Morphological differentiation of the nervous system. (Amphibia) 



c. Nucleic acids and differentiation. (Amphibia; Aves) 



ROSSI, Miss M. R. Dr.Nat.Sci. — 1st. di Anat. Comp., Via Belmeloro 8 



BOLOGNA (103), Italia 

 ROSSINI, Miss M. C. Dr.Nat.Sci. — 1st. di Anat. Comp., Via Belmeloro 8, 



BOLOGNA (103), Italia 

 ROSTAND, J. M.I.I.E. — 29 Rue Pradier, VILLE DAVRAY (S. & O.), 



France 



a. Parthenogenese et gynogenese; regulation chromosomique par le froid. 

 (Amphibia) 



b. Mutations (polydactylie, ectrodactylie, etc.) et anomalies provoquees par 

 le milieu exterieur (principalement "Anomalie P"). (Amphibia) 



c. Action protectrice de la glycerine a l'egard de la congelation des cellules 

 spermatiques. (Amphibia) 



ROTHENBUHLER, W. C. B.S., M.S., Ph.D., Prof. — Dept. of Zool. and 

 Entomol., Ohio State Univ., COLUMBUS 10, Ohio, U.S.A. 

 (no embryological work in progress) 



ROTT, Mrs. N. N. Cand.biol.sci. — Inst, of Animal Morphol., Acad, of Sci. 

 of the U.S.S.R., First Academic St. 12, MOSCOW V-133, U.S.S.R. 

 a. Induction of diploid androgenesis by heat treatment. Ambystoma mexi- 

 canum (Urodela) 



ROULSTON, W. J. M.Sc. — Veterinary Parasitol. Lab., C.S.I.R.O., Div. of 

 Animal Health, 677 Fairfield Rd.. YEERONGPILLY, S. 4, Queensland, 

 Australia 

 a. Levels of carboxyesterases in eggs and larvae. Boophilus microplus (Ixo- 

 didae, Acatina) (in collaboration with H. J. SCHNITZERLING) 



ROUSSEV, G. K. Dr. — Med. Research Inst., 27 Blvd. Hristo Botev, SO- 

 FIA 6, Bulgaria 



137 



