PORTER, K. R.; Ph.D., Prof. - Dept. of Molec, Cell, and Developm. Biol., Univ. of Colorado, 



BOULDER, CO 80302, U.S.A. 

 POSTLETHWAIT, J. H.; Ph.D. - Dept. of Biol., Univ. of Oregon, EUGENE, OR 97403, U.S.A. 

 a Mechanism of action of homoeotic mutants. Drosophila melanogaster (Diptera) 

 b Heritabihty of sex determination. Same species as a 

 c Role of the cortex in early development. Same species as a 

 d Hormonal control of metamorphosis. Same species as a 

 e Hormonal and genetic control of oogenesis. Same species as a 

 f Hormonal reculation of acid phosphatase activity. Same species as a 

 POULSON, D. F.'; Ph.D.. Prof. - Dept. of Biol., Kline Biol. Tower, Yale Univ., NEW HAVEN, 



CT 06520, U.S.A. 

 a Mid-gut: genesis and differentiation. Drosophila melanogaster (Diptera) 

 b Chromosomal control of differentiation. Same species as a 

 c Neurogenesis in normal and genetically deficient embryos. Same species as a 

 d Maternally inherited sex-ratio disturbances of development. Drosophila melanogaster, D. 



bifasciata, D. willistoni, D. ncbulosa, D. equinoxialis, D. robusta, D. paulistorum (Diptera) 

 e Developmental genetics. Same species as a . „ ^ ^, 



POURANY, Mrs. A.; M.Sc. - Dept. of Anat., Jawaharlal Inst, of Postgrad. Med. Educ. and Res., 



PONDlCHERRY-605006, India 

 a Histogenesis and morphometry of endocrine pancreas. Homo sapiens (Primates) 

 PRAHLAD, K. v.; Ph.D., Prof. - Dept. of Biol. Sci., Northern Ihinois Univ., DeKALB, IL 60115, 



U.S.A.' 

 a Biochemical and morphological effects of thyroid hormones on embryonic tissues. Xcnopus 



lacvis (Anura) <. . • n • *i 



b Effect of pesticides on embryogenesis and initiation of endocrine function, especially in the 



thyroid gland. Xenopus laevis (Anura), Callus domesticus (Aves) 

 PRASAD, M. R. N.;Ph.D., Prof. - Dept. of Zool., Univ. of Delhi, DELHI 110007, India 

 a Action mechanism of hormones on nucleic acid and protein synthesis in the blastocyst and 



uterus. Rattus spec, Mesocricetus auratus (Rodentia) 

 PRATT R M • Ph.D. - Craniofac. Anomal. Sect., Lab. of Developm. Biol, and Anomalies, Natl. Inst. 



of bent. Res., N.I.H., Bldg. 30, BETHESDA, MD 20014, U.S.A. 

 a Biochemical and morphological changes in the epithelium of the secondary palate at the time of 



programmed cell death. (Rodentia) 

 b Programmed cell changes in the secondary palate: lysosomal enzymes, DNA and RNA synthesis, 



acid mucopolysaccharide and glycoprotein synthesis, collagen synthesis and the role of cAMP. 



(Rodentia) . , . r , .. i 



c Effects of agents producing cleft palate in vivo on growth, DNA, protein synthesis, etc. ot palatal 



mesenchyme cells in vitro. (Rodentia) 

 d Growth, steroid and cvclic nucleotide binding proteins, susceptibility to glucocorticoids ot 



palatal cells from strains "with different response to cortisone. Mus musculus (Rodentia) 

 e Migration of cranial neural crest cells: nature and origin of extracellular matrix; biochemistry of 



crest cells cultured in vitro; biochemical factors that may control differentiation. (Rodentia) 

 PRAY, T. R.; Ph.D., Prof. - Dept. of Biol. Sci., Univ. of S. Cahfornia, University Park, LOS 



ANGELES, CA 90007, U.S.A. , ^^, ., , 



a Development of the gametophytes and juvenile stages of the sporophytes. (Cheilantheae, 



Pteridaceae, Filicinae) 

 b Development of the vein systems of leaves. Anemia spec, Marsilca spec, Cyrtomium spec, 



Acrostichum spec, and other spp. (I-ilicinae) 

 c Factors controlhng planes of cytokinesis in early gametophyte development. Cheilanthes spp. 



(Pteridaceae, Filicinae) ,,rvi r- n i c 



PRICE Miss D.; Prof. (Emer.) - Dept. of Biol., Div. of Biol. Sci., Univ. of Chicago, 1101 L. 57th St., 



CHICAGO, IL 60637, U.S.A. ... . u ..nxTxnnir^ 



PRITCHARD, E. T.; Ph.D., Prof. - Dept. of Oral Biol., Fac of Dent., Univ. of Manitoba, WINNIPEG, 



Man. R3E0W3', Canada , , ^ ,d ^ .• ^ 



a Arylesterases and their relation to secretion in growing saUvary gland. Rattus spec. (Rodentia) 

 b Relation of sulfolipid metabolism to age and secretory stimuli in sahvary gland. Same species as a 

 PRZYBYLSKI R J • Ph D Assoc. Prof. - Dept. of Anat., Developm. Biol. Ctr., Case Western 



Reserve Univ., 21 19 AbingtonRd., CLEVELAND, OH 44106, U.S.A. 

 a Cell surface proteins-glycoproteins during skeletal myogenesis m culture. Callus spec (Aves) 

 b Ontogeny of insulin binding and biological effects during skeletal myogenesis 

 c Mechanism of myoblast fusion and effects of heterokaryon formation 

 d Cardiac hypertrophy in embryos produced by hypothermia. GaUus spec (Aves) 

 e Localization of myosin genes on the chromosome by in situ hybridiz^ation 

 PUGIN E - Inst, de Embriol., Univ. Austral de Chile, Casilla no. 567, VALDIVIA, Chile 

 a Process of morphophysiological adaptation in development. Chilian species (Anura) 

 b Search for a technique for direct experimental study of hmb morphogenesis. Rattus spec. 



PURKO° l" Ph.D., Assoc Prof. - Dept. of Zool., Univ. of W. Ontario, LONDON, Ont. N6A 5B7, 



Canada , , • /t i * ■\ 



a Regulation and role of RNA and protein synthesis in early embryogenesis (Teleostei) 

 QUATRANO R S " Ph D., Assoc Prof. Dept. of Bot. and Plant Pathol., Oregon State Univ., 



CORVALLIS, OR 97331, U.S.A. . ,^ • n r ^ 



a Control of storage protein synthesis during early embryogenesis. (Gramineac, Papilionaccae) 



71 



