Per-Pik 



PERDRIX, Miss S. — Lab. de Zool. exper., Fac. des Sci., 16 Quai CI. Bei> 

 nard, LYON, France 



a. Etude autoradiographique du metabolisme des acides nucleiques au cours 

 de l'ovogenese. Drosophila melanogaster (Dipteta) 



b. Etude autoradiographique du metabolisme des acides nucleiques durant 

 le developpement embryonnaire. Arbacia lixula ( Echinoidea) 



PERKOWSKA, Mrs. E. MOSER Dr. — Dept. of Cytol., Warsaw Univ., 

 Krakowskie Przedmiescie 26/28, WARSZAWA 64, Poland 

 a. Some biochemical characteristics of embryonic mitochondria. Rattus spec. 

 (Rodentia) 

 PERLES, B. — Lab. d'Anat. fonctionnelle et de Neuro-anat., Fac. de Med., 

 45 Rue des Sts. Peres, PARIS Vie, France 

 a. Oreille interne. Homo sapiens (Primates) 

 PERLMANN, H. P. Ph.D., M.I.I.E. — Wenner-Gren's Inst, for exper. 

 Biol., Norrtullsgatan 16, STOCKHOLM Va., Sweden 

 a. Serological study of proteins during early development. Paracentrotus 

 lividus (Echinoidea) (in collaboration with Mrs. J. C. KALTENBACH, 

 South Hadley, Mass., U.S.A.) 

 PERRAYON, R. — Lab. de Zool. exper., Fac. des Sci., 16 Quai CI. Bernard, 

 LYON, France 

 a. Evolution de caracteres physiologiques au cours du developpement. 

 Acanthoscelides obsoletus (Coleoptera) 



PERRENOT, Miss M. Lie. es Sci. — Lab. de Zool. et d'Embryol. exper., 



Inst, de Zool. et de Biol, gener., 12 Rue de l'Universite, STRASBOURG, 



France 

 a. Differentiation du complexe surrenalien et eveil des correlations hypo- 



physo-surrenaliennes. Gallus spec, Anas spec. (Aves) 

 f PERRI, T. Dott., M.I.I.E., Prof. — 1st. di Anat. Comp., Fac. di Sci., S. 



Pietro, PERUGIA, Italia 



(deceased) 

 PERRY, Miss M. M. B.Sc. — Inst, of Animal Genet., Univ. Dept. of Genet., 



King's Buildings, West Mains Road, EDINBURGH 9, Scotland 



a. Developmental effects of metabolic antagonists. (Evertebrata; Vertebrata) 

 (in collaboration with C. H. WADDINGTON) 



b. Electron microscope studies of gene action, (in collaboration with C. H. 

 WADDINGTON) 



c. Study of certain features of developing embryos using electronmicro- 

 graphs. (Diptera; Amphibia) (in collaboration with G. G. SELMAN and 

 C. H. WADDINGTON) 



d. Differentiation of the reticulocyte. Homo sapiens (Primates) (in colla- 

 boration with Mrs. R. M. CLAYTON (FREEDMAN) and K. B. 

 ROBERTS) 



PERTUSA, J. Lic.Sc, Dr.Ph. — Dept. of Anat. and Embryol., Univ. Coll. 

 of London, Gower St., LONDON W.C. 1, England 

 a. Studies on morphogenetic movements in the blastoderm. Gallus domestic 

 cus (Aves) 

 PETERS, A. B.Sc, Ph.D. — Dept. of Anat., Univ. of Edinburgh, Univ. 

 New Buildings, Teviot Row, EDINBURGH 8, Scotland 

 a. Electron microscope study of Schwann cell — axon relationship in deve- 

 loping nerves. Xenopus laevis (Anura) 



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