Ridley 75 Rollhauser 



b. The distribution of radio-phosphorous (P :{ -) in metamorphosing larvae 



of R. sylvatica and R. pipiens as shown by radioautographs. (From 



complete operculum through the larval change) (Amphibia, Anura) (in 



collaboration with J. F. GENNARO Jr.) 

 RISLER, H. Dr rer. nat. — Zool. Inst, der Univ. Tubingen, u. Max-Planck- 



Inst. fur Biol., Holderlinstr. 12, TUBINGEN, Deutschland. 

 a. Kernwachstum in verschiedenen Geweben wahrend der Metamorphose 



bei Ephestia kiihniella. (Ptychopoda seriata, Lepidoptera) 

 RISLEY, P. L. A.B., M.S., Ph.D., Prof. — Dept of Biol., Univ. of Oregon, 



EUGENE, Ore., U.S.A. (no data received over this year) 



RIZZOLI, C. M.D. — 1st. di Istol. e Fisiol. gen., Via Belmeloro 8. BO- 

 LOGNA, Italia. (no data received over this year) 

 ROBERTSEN, Mrs F. M. B.Sc. — Univ. Dept of Genet., Inst, of Anim. 



Genet., West Mains Rd, King's Buildings, EDINBURGH 9, U.K. 

 a. Morphological and experimental investigation of coiling in Limnaea 



peregra. (Mollusca) 

 ROBERTSON, F. W. B.Sc, Ph.D. — Genet. Lab., Anim. Breeding and 



Genet. Res. Organ., Inst, of Anim. Genet., West Mains Rd, King's 



Buildings, EDINBURGH 9, U.K. 

 a. Developmental study of lines selected for large and small body size in 



Drosophila melanog aster. (Insecta) (in collaboration with E. C. R. 



REEVE) 

 ROBERTSON, G. G. Ph.D., Prof. — Dept of Anat., Coll. of Med., Baylor 



Univ., 1200 M. D. Anderson Blvd. Texas Med. Center, HOUSTON 5, 



Tex., U.S.A. 



a. The appearence and development of ossification centers in human 

 embryos. (Mammalia) 



b. The production of anomalies in rat embryos by nitrogen mustards. Mus 

 norvegicus (Mammalia) 



ROCK, J. M.D. — Free Hospital for Women, 245, Pond Ave, BROOK- 

 LINE, Mass., U.S.A. 



a. Development of human ova from fertilization to 14 days (first missed 

 menstrual period). (Mammalia) (in collaboration with A. T. HERTIG) 



b. A morphologic description of 3 segmenting human embryos; a 2-cell tubal 

 ovum, a 30-cell early blastula (4 days-uterine), and a 60-cell blastula 

 A]/2 — 5 days-uterine). (Mammalia) (in collaboration with A. T. HER- 

 TIG) 



ROETHELI, A. Dr Phil. — BOREN a.A., Kant. Bern, Schweiz. 



a. Physiologie des Knochenfischspermas. (Pisces) 

 ROGERS, K. T. A.B., M.A. — Biol. Lab's, Harvard Univ., Divinity Ave, 

 CAMBRIDGE 38, Mass., U.S.A. 



a. Survey of experimental production of cyclopean fish embryos; study 

 of their morphology, especially nerve tracts. Fundulus heteroclitus 

 (Pisces) 



b. Study of the development of the eye and optic tracts of chick and of 

 owl embryos, as compared with fish. Gallus domesticus, Bubo virginianus, 

 Otus asio (Aves) 



ROLLHAUSER, H. Dr Med. — Anat. Inst, der Univ., Robert Koch Str. 6, 

 MARBURGlLahn, Deutschland. 

 a. Submikroskopische Strukturanderungen der kollagenen Fasern wahrend 

 des Wachstums. Mensch (Sauger) 



