PENTZ, S. Dr.phil. — Heiligenberg Inst., 7799 HEILIGENBERG. Baden, W.Germany 

 a Rontgeninduktion von Mutationen an Fliigelschuppen. Plodia intecpunctella (Lepidoptera) 

 b Induktionsbedingungen der larvalen Diapause. Plodia interpunctella (Lepidoptera) 

 PENZLIN, H. Dr.rer.nat. — Zool. Inst, der Univ., Universitatsplatz 2, ROSTOCK, East. 



Germany 

 PERA, L. M.D., Prof. — 1st. di Anat. e Istoembriol.. Univ. di Pisa, Via Roma 55, 56100 



PISA, Italy 

 PERDUE, Mrs. S. — Biol. Div.. Oak Ridge Natl. Lab., P.O. Box Y, OAK RIDGE. Tenn. 



37830, U.S.A. 

 a Nuclear degeneration during the terminal lens fiber cell differentiation in developing lens; 

 histological and microspectrophotometric analysis. Callus domesticus (Aves) (in col- 

 laboration with S. P. MODAK) 

 PERKOWSKA (MOSER), Mrs. E. Ph.D. — Inst, of Anim. Genet., King's Buildings, 



V/est Mains Rd., EDINBURGH 9, Scotland. U.K. 

 PERLES, B. Lab. d'Anat., Fac. de Med., 45 rue des Sts. Peres, 75 PARIS Vie, France 

 PERLMANN. H. P. Ph.D. — The Wenner-Gren Inst., Norrtullsgatan 16, S-1 13 45 STOCK- 

 HOLM, Sweden • 

 PERNARD. J.-C. — Div. of Cell Biol, and Chem. Embryol.. Zool. Inst., Univ. of Bern, 



Sahlistr. 8. CH-3000 BERN, Switzerland 

 a Mechanism of tissue involution during metamorphosis. Xenopus laevis (Anura) (in col- 

 laboration with R. WEBER) 

 PERRIER, Mrs. H. D.E.S. — Lab. de Physiol. Anim., Fac. des Sci., B.P. 347, 51 REIMS, 



France 

 a Electron microscopic study of the foetal and perinatal pancreas. Rattus norvegicus (Ro- 



dentia) 

 PERRY. Miss M. M. B.Sc. — Inst, of Anim. Genet.. Univ. of Edinburgh, West Mains Rd.. 



EDINBURGH EH9 3JN, Scotland, U.K. 

 a Study of certain features of developing embryos by electron microscopy. (Amphibia) (in 



collaboration with J. JACOB and C. H. WADDINGTON) 

 b Electron microscope studies of mutants. Drosophila spp. (Diptera) (in collaboration with 



C. H. WADDINGTON) 

 c Ultrastructural changes during growth. Micrastenas thomasiana ( Desmidoidea. Conjugales) 



(in collaboration with C. H. WADDINGTON) 

 d Ultrastructural and experimental study of cleavage. Tritmus alpestris (Urodela). Xenopus 



laevis (Anura) (in collaboration with G. G. SELMAN) 

 PERSAUD, T. V. N. M.D. — Dept. of Anat., Fac. of Med.. Univ. of the West Indies. 



Mona, KINGSTON 7, Jamaica 

 a Developmental pathology and teratogenesis: embryopathic activity of the active principles 

 contained in West Indian medicinal plants. Rattus norvegicus. Mus musculus (Rodentia), 

 Oryctolagus cuniculus (Lagomorpha) 

 h Effects of essential amino acid imbalances on embryogenesis. Rattus norvegicus, Mus mus- 

 culus (Rodentia), Oryctolagus cuniculus (Lagomorpha) 

 PERSONS, Miss B. J. — Biol. Div., Oak Ridge Natl. Lab.. P.O. Box Y. OAK RIDGE. 



Tenn. 37830, U.S.A. 

 a Cellular replication during the development and growth of lens. Callus domesticus (Aves) 



(in collaboration with S. P. MODAK) 

 b The pattern of RNA synthesis during lens development. Callus domesticus (Aves) (in 



collaboration with S. P. MODAK) 

 PERSOV. G. M. Cand.biol.sci. — Biol. Inst.. Leningrad State Univ., LENINGRAD B-164, 



U.S.S.R. 

 a Sex differentiation. (Chondrostei; Teleostei) 



b The process of gametogenesis under ionizing radiations. (Chondrostei: Teleostei) 

 PERTUSA. J. Ph.D. —Inst. Biol, de Sarria, Dr.Amigant 31, BARCELONA 17, Spain 

 PETERS, A. Ph.D., Prof. — Dept. of Anat., School of Med.. Boston Univ.. 80 E. Concord 



St.. BOSTON. Mass. 02118, U.S.A. 

 a Electron microscopic study of the formation of myelin sheaths and development of neuro- 

 glial cells in the central nervous system. Rattus domesticus (Rodentia) 

 PETERS, Mrs. H. M.D. — Finsen Lab., Finsen Inst.. 49 Strandboulevard, DK-2100 



COPENHAGEN. Denmark 

 a Development of the ovary: morphology, cell dynamics and function. Mus musculus 



(Rodentia) 

 h The effect of hormones (testosterone propionate) on the development of the ovary in 



infancy. Mus musculus (Rodentia) 

 c Development of ovaries in the offspring of females irradiated before conception. Mus 

 musculus (Rodentia) ^ttvt,-t-m 



PETERS, J J. Ph.D., Prof. — Dept. of Biol., Xavier Univ.. Victoria Parkway. CINCIN- 

 NATI. Ohio 45207, U.S.A. 

 PETERS, N. W. Dr.rer.nat. — Inst, fiir Hydrobiol. und Fischereiwiss., Univ. Hamburg. 

 Olbersweg 24, 2 HAMBURG-Altona 1, W.Germany 



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