WESTON, J. A. Ph.D. — Dept. of Biol., Univ. of Oregon, EUGENE, Ore. 97403, U.S.A. • 

 a The migration and differentiation of neural crest cells. Gallus domesticus (Aves), Mus 



musculus (Rodentia) 

 b The cell surface as an effector of cell specificity. Gallus domesticus (Aves) 

 c The action of morphogenetic agents on embryonic cell behavior in vivo and in vitro. 



Gallus domesticus (Aves) 

 WEYGOLDT, P. Dr. — Biol. Inst. I (Zool.) der Univ., Katharinenstr. 20, 78 FREIBURG, 



W.Germany 

 a General and comparative embryology. (Pseudoscorpionidea and other Arachnida) 

 b Embryology. Tarantula marginemaculata (Amblypygidae, Arachnida) 

 c Embryology. Euphilomedes ptoducta (Ostracoda, Crustacea) 

 WHALEY, W. G. Ph.D., Prof. — Cell Res. Inst., B.L.220, Univ. of Texas, AUSTIN, Tex. 



78712, U.S.A. 

 WHARTON, L. R., Jr. M.D. — Dept. of Gynecol, and Obstet., Sch. of Med., Johns Hopkins 



Hosp., BALTIMORE, Md. 21205, U.S.A. 

 WHITE, Miss J. B.A. — Dept. of Developm. Biol., Marischal Coll., Univ. of Aberdeen, 



ABERDEEN AB9 IAS, Scotland, U.K. 

 a Effects of hydrocortisone on embryonic tissue cells grown in vitro. Gallus gallus 



(Aves) 

 b Dissociation of embryonic tissues and viability of cultured cells. Same species as a 

 WHITELEY, A. H. Ph.D., Prof. — Dept. of Zool., Univ. of Washington, SEATLLE, Wash. 



98105, U.S.A. • 



WHITT, G. S. Ph.D. — Dept. of Zool., Univ. of Illinois, URBANA, 111. 61801, U.S.A. 

 a Developmental genetics: 1. expression of differential gene function during early embryo- 

 genesis and cytodifferentiation with an emphasis on those genes responsible for isozymes; 



2. correlation of lactate dehydrogenase gene homology with the specificity of the gene 



activating mechanisms during development; 3. genetical, physical, and chemical analysis 



of the lactate dehydrogenase isozymes unique to the differentiated nervous system; 4. 



biochemical genetics of isozymes, especially lactate dehydrogenase; 5. asynchronous allele 



activation during embryogenesis of interspecific and intergeneric hybrids. Micropterus 



dolomieui, M. salmoides and other spp. (Centracchidae, Teleostei) 

 b Epigenetic and genetic control of protein synthesis during cytodifferentiation with emphasis 



on the post-translational control of gene product (especially lactate dehydrogenase 



isozymes) , assembly and function. (Teleostei and other Vertebrata) 

 WHITTAKER, J. R. Ph.D. — The Wistar Inst, of Anat. and Biol., 36th St. at Spruce, 



PHILADELPHIA, Pa. 19104, U.S.A. • 



a Melanin biosynthesis and cell regulatory mechanisms in differentiating pigment cells. Ciona 



intestinalis (Ascidiacea) , Gallus domesticus (Aves) 

 b Localization and segregation of cytoplasmic information concerned with specific enzyme 



differentiations in embryonic development: acetylcholinesterase, tyrosinase, alkaline 



phosphatase. Ciona intestinalis, Styela partita, Molgula manhattensis (Ascidiacea) 

 WHITTEN, W. K. D.Sc, B.V.Sc. — The Jackson Lab., BAR HARBOR, Me. 04609, U.S.A. 

 a Preimplantation stages of development in vivo and in vitro. Mas musculus 



(Rodentia) 

 WHITTINGHAM, D. G Ph.D. — Marshall Lab., Dept. of Physiol., Univ. of Cambridge, 



Downing St., CAMBRIDGE CB2 3EG, England 

 a Nutrient requirements for growth and development of eggs in vi t r o. Mus musculus, 



Mesocricetus auratus (Rodentia) , Mustela putorius furo (Carnivora), Ovis aries (Artio- 



dactyla) 

 b Storage of embryos at low temperature. Mus musculus (Rodentia) 

 WIDERSTEN, B. Fil.lic. — Zool. Inst., Univ. of Uppsala, Box 561, S-75122 UPPSALA 1, 



Sweden 

 a Larval development. (Scyphozoa) 

 WIDNELL, C. C. Ph.D., Prof. — Dept. of Anat. and Cell Biol., School of Med., Univ. of 



Pittsburgh, PITTSBURGH, Pa. 15213, U.S.A. 

 a Changes in endoplasmic reticulum membrane enzymes during development and aging. 



Rattus norvegicus (Rodentia) 

 WIERTZ (HOESSELS) , Mrs. E. L. M. J. Ph.D. — Vet. Anat. and Embryol. Inst., Univ. of 



Utrecht, Bekkerstr. 141, UTRECHT, Netherlands 

 a Effect of penicillin and streptomycin on early development. Gallus domesticus (Aves) 

 b Neural induction and pattern formation of rhombencephalic and anterior spinal cord region. 



Same species as a 

 WIEST, Miss L. Dr.phil. — Inst, fur Krebsforsch., Univ. Wien, Borschkegasse 8a, Postfach 



72, A- 1090 WIEN, Austria 

 a Endocrine control in liver regeneration. Rattus norvegicus, Mus musculus (Rodentia) 

 WIGGLESWORTH, Sir V. B. Dr., Prof.(Emer.) — Dept. of Zool., Univ. of Cambridge, 



Downing St., CAMBRIDGE, England • 



a Mode of action of growth hormones. Rhodnius prolixus (Triatomidae, Hemiptera) 



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