a Transdetermination in imaginal discs after long-term culture in vivo. Drosophila me- 



lanogasfer (Diptera) 

 PAGER, Miss J. DrJe Cycle — Lab. de Physiol. Anim., Fac. des Sci., Univ. de Poitiers, 



40 Av. de Recteur Pineau, 86 POITIERS. France 

 a Histology and electron microscopy of the embryonic heart. Ambystoma tigrinum (Uro- 



dela), Ratfus norvegicus (Rodentia) 

 PAI, M. L. Ph.D. — Dept. of Biochem., Med. Coll., BARODA, Gujarat State, India 

 PAI. S. Dr.rer.nat. — Lab. of Developm. Physiol., Inst, of Exper. Biol., Acad. Sinica, 320 



Yo Yang Rd., SHANGHAI, People's Republ. of China • 



PALA, Miss M. Dr. — 1st. di Zool., Fac. di S.M.F.N., Univ. di Sassari, Via Murroni 25, 



07100 SASSARI, Italy 

 a Research on the origin of the primordial germ cells. Anas spec. (Aves) 

 PALECEK, J. RNDr. — Dept. of Exper. Zool., Charles Univ., Vinicna 7, PRAHA 2, 



Czechoslovakia 

 a Proteins and antigens in early development. (Amphibia) (in collaboration with A. RO- 



MANOVSKf, A. MACELA and J. MACHA) 

 PALMA, A. M.D. — 1st. di Anat. Umana Norm., Univ. di Roma, Viale Regina Elena 289, 



ROMA, Italy 

 PALMITER. R. D. Ph.D. — Dept. of Pharmacol., School of Med.. Stanford Univ.. 



STANFORD, Calif. 94305, U.S.A. 

 a Mechanisms of steroid (especially estrogen and progesterone) induction of ovalbumin 



synthesis in the oviduct of the immature chicken. Gallus domesticus (Aves) 

 PANDEY. K. M.Sc. — Dept. of Zool.. Univ. of Gorakhpur. GORAKHPUR (U.P.). India 

 a Seasonal changes in the secretory activity of the pituitary gland in relation to the gonads 



of a freshwater eel. The possible role of the gonadotrophins in regulation and development 



of gonads. (Teleostei) 

 PANIGEL, M. Dr.en Med.. Dr.es Sci.. Prof. — Inst. Natl, de la Sante et de la Rech. Med.. 



Unite de Physiol, placentaire. Hop. Saint-Antoine. 184. rue du Faubourg Saint- Antoine. 



PARIS 12e. France 

 a Placental structure and function: ultrastructural and perfusion studies (morphology, phy- 

 siology and pathology). Cauia spec, Mus spec. (Rodentia), Macaca spec. Papio spec, 



Homo sapiens (Primates) 

 b The uteroplacental circulation. Cynomolgus spec. (Primates) 

 PANITZ. R. Dr. — Inst, fiir Kulturpflanzenforsch. der Deutschen Akad. der Wissenschaften 



zu Berlin. GATERSLEBEN. Kr.Aschersleben, East.Germany 

 a Cytological and biochemical characterization of gene function in giant chromosomes. Acri- 



cctopus lucidus, Chironomus thummi, C. stcenzkei (Chiconomidae, Diptera) 

 PANNBACKER, R. G. Ph.D. — Charles F. Kettering Research Labs.. 150 E.South College 



St.. YELLOW SPRINGS. Ohio 45387, U.S.A. 

 a The chemical nature of aggregation hormones. Dictyostelium discoideum (Acrasiales) 

 h Histochemical study of differentiation at the multicellular level. Dictyostelium discoideum 



(Acrasiales) 

 PANNESE. E. M.D., Prof. — 2nd Chair of Human Anat.. Univ. of Milano. Via Mangia- 



galli 31. 20133 MILANO, Italy 

 a Histochemical study at the electron microscope level of the differentiation of neuroblasts 



in embryonic spinal ganglia. Gallus gallus (Aves) 

 b Electron microscope study of the development of satellite cells in spinal ganglia. Gallus 



gallus (Aves) 

 PANT (AIYAR). Mrs. R. Ph.D. — Dept. of Biochem., Fac. of Sci., Allahabad Univ., 



ALLAHABAD-2. India 

 a Quantitative studies of various metabolites in eggs, e.g. nitrogenous compounds, phos- 

 phorus compounds, reducing substances and citric acid. Philosamia ricini (Lepidoptera). 



Musca domestica, Sarcophaga ruficornis (Diptera) (in collaboration with D. M. LAL 



and R. VARMA) 

 b Variation in the activity of some enzymes in eggs. Philosamia ricini (Lepidoptera). Musca 



domestica, Sarcophaga ruficornis (Diptera) (in collaboration with D. M. LAL and R. 



VARMA) 

 c Quantitative studies of various metabolites during metamorphosis. Philosamia ricini (Lepi- 

 doptera), Musca nebulo, Sarcophaga ruficornis (Diptera) (in collaboration with D. M. 



LAL. Miss I. D. MORRIS and R. VARMA) 

 d Quantitative studies of certain metabolites and enzymic studies on the fat body during 



larval and pupal development. Philosamia ricini (Lepidoptera) (in collaboration with 



D. M. LAL. Miss I. D. MORRIS and R. VARMA) 

 PANTELOURIS, E. M. Ph.D. — Dept. of Appl. Microbiol, and Biol., Univ. of Strathclyde, 



George St., GLASGOW C.l, Scotland. U.K. 

 a Effects of radiation on foetuses and means of alleviating them. Mus musculus (Rodentia) 

 b Ontogenesis and inheritance of iso-enzymes. Drosophila spp. (Diptera), (Vertebrata) 

 PAPACONSTANTINOU. J. Ph.D. — Biol. Div.. Oak Ridge Natl. Lab.. P.O. Box Y. 



OAK RIDGE. Tenn. 37830, U.S.A. • 



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