PICHERAL, B. Dr.3eme Cycle — Lab. de Biol. Gen., Fac. des Sci., 35 RENNES, France 

 PICKWORTH, Miss S. Ph.D. — Dept. of Zool.. Univ. of Bristol, BRISTOL BS8 1UG, 



England 

 PIDDINGTON, R. L. Ph.D. — Dept. of Histol. and Embryol., School of Dental Med., Univ. 



of Pennsylvania, 40th and Spruce Sts., PHILADELPHIA, Pa. 19104, U.S.A. 

 a Correlations between glutamine synthetase development and specific histological, 



biochemical, and physiological events in the functional maturation of nervous tissue. 



G alius domesticus (Aves) 

 PIEAU, CI. Lic.es Sci. — Serv. d'Embryol. Exper., Inst. Pasteur, 20 rue des Moulins, 95 



SANNOIS, France 

 a The mechanism of sexual differentiation. Cistudo europaea, Testudo graeca (Chelonia) 

 b Effects of x-rays on embryonic development. Lacerta viridis, Anguis fragilis (Lacertilia) 



(with J. VASSE) 

 c The mechanisms of arrest of the elongation and of degeneration of Miillerian ducts in 



male embryos. Lacerta viridis (Lacertilia), Cistudo europaea (Chelonia) (with A. RAY- 

 NAUD) 

 PIERRO, L. J. Ph.D., Prof. — Dept. of Anim. Genet., Storrs Agric. Exper. Station, Univ. of 



Connecticut, STORRS, Conn. 06268, U.S.A. • 



a Chemical teratogenesis: inhibitors of nucleic acid and protein metabolism. Gallus domesti- 

 cus (Aves) 

 b Gene interaction in the control of formation of specific melanin granules. Mus musculus 



(Rodentia) 

 c Eye development. Same species as b 

 d Developmental genetics. Same species as a 

 PIHAN, J. C. Agr.de Sci. — Lab. de Zool., U.E.R. Phys. Chim. Biol., Univ. Nancy 1, Case 



Off. 72, 54 NANCY 01, France 

 a Etude experimentale du developpement post-embryonnaire du systeme tracheen. Brachycera, 



Diptera) (avec F. STfiPHAN) 

 PIJNACKER, L. P. Ph.D. — Genet. Inst., Univ. of Groningen, Biol. Centrum, Vleugel A, 



Kerklaan 30, HAREN (Gr.), Netherlands 

 a Oogenesis, spermatogenesis, spermiogenesis, fertilization and parthenogenesis. Carausius 



morosus (Phasmida) , (Acari, Arachnida) 

 b Embryonic development in eggs without a micropyle and in normal eggs without air- 

 conditions. Carausius morosus (Phasmida) 

 PIKO, L. Ing.Agr., D.V.M. — Developm. Biol. Lab., Veterans Adm. Hosp., SEPULVEDA, 



Calif., U.S.A. • 



PILKINGTON, J. B. Ph.D. — Dept. of Zool., Univ. of Otago, DUNEDIN, New Zealand 

 a Physiology of calcified endolymphatic deposits during metamorphosis. Hyla aurea 



(Anura) 

 PILLERI, G. Dr.med., Prof. — Brain Anat. Inst., Untere Zollgasse 71, (Waldau), 3072 



OSTERMUNDIGEN-BE, Switzerland 

 a Entwicklung des Gehirns. Castor canadensis (Rodentia) 



b Die Protuberantia sclerae am embryonalen Auge. Homo sapiens (Primates) 

 c Ontogenese des Auges. Balaenoptera physalus, B. acutorostrata, Megaptera novaeangliae, 



Delphinus delphis, Tursiops truncatus, Delphinapterus leucas (Cetacea) 

 d Entwicklung der Korperform. Same species as c 

 e Ontogenese des Zentralnervensystems. Same species as c 



f Ontogenesis (especially nervous system). Globicephala melaena (Odontoceti, Cetacea) 

 PINEAU, H. — Lab. d'Anat., Univ. Paris V — Rene Descartes, 45 rue des Saints Peres 



75 PARIS Vie, France 

 a Longitudinal study of general growth. Homo sapiens (Primates) 

 PINET, J.-M. Dr.es Sci. — Inst. Natl. Agronomique, Lab. de Zool., 16 rue Claude-Bernard, 



75 PARIS 5e, France 

 a Development and electrophysiology of sense organs in the mouth-parts. Rhodnius prolixus 



(Heteroptera) 

 b Development of the integument, especially studies of the chitinogenic cell of the maxillary 



bud. Rhodnius prolixus (Heteroptera) 

 PINGANAUD (PERRIN), Mrs. G. Dr.Spec. — Lab. d'Anat. Comp., Univ. Paris VII, 2 



Place Jussieu, 75 PARIS Ve, France 

 a Experimental study of chondrocranium and bony skull. Salmo irideus (Teleostei) 

 b Regeneration of the frontal bone. Same species as a 

 PIPA, R. L. Ph.D., Prof. — Div. of Entomol., Univ. of California, BERKELEY, Calif. 



94720, U.S.A. 

 a Movements of neuroglia associated with shortening of ventral nerve cord in early pupa; 



regulation by ecdysone in vitro; nucleic acid synthesis within these glial cells 



(autoradiography); effects of metabolic inhibitors. Galleria mellonella (Lepidoptera) 

 PIPERNO, Mrs. A. Dr.es Sci. — Inst, de Biol. Molec, Fac. des Sci., Tour 43, 9 quai 



St.Bernard, 75 PARIS Ve, France 

 a Expression of differentiation in liver cells in culture. Rattus spec. (Rodentia) 



142 



