DAVIDSON E H. B.A., Ph.D. — Rockefeller Inst, for Med. Research, 

 66th St.and York Ave.. NEW YORK. N.Y. 10021. U.S.A. 

 a. Study of gene activity in oogenesis, the species and function of nucleic 



acids produced in lampbrush stage oocytes. Xenopus laevis (Anura) 

 h. Study of the molecular basis of cytoplasmic prelocalization. Ilyanassa 

 obsoleta (Gastropoda) 

 DA VIES. D. H. M.Sc, Ph.D., Prof. — Oceanographic Research Inst.. P.O. 

 Box 736, DURBAN, Republic of South Africa 

 a. General embryology. (Carcharinidae, Selachii) 

 DAVIES D.V. M.A., D.Sc, F.R.C.S., Prof. — Dept. of Anat., St. Thomas's 

 Hosp. Med. School, LONDON S.E.I. England 

 a. Joints. (Mammalia) 

 h. Placentation. (Vertebrata) 

 DAVIS Ch C. Ph.D.. Prof. — Developm. Biol. Center, Dept. of Biol., Wes- 

 tern Reserve Univ., 2127 Cornell Road. CLEVELAND 6, Ohio, U.S.A. 

 DAVIS Miss C. W. C. B.Sc. — Zool. Building, School of Biol. Scis.. Univ. 

 of Sydney, SYDNEY, N.S.W.. Australia 

 a. Descriptive and experimental embryology. Culex fatigans (Nematocera, 

 Diptera) , Lucilia cuprina (Cyclorrhapha, Diptera) 

 DAVIS, G. F. R. B.Sc, M.Sc, Ph.D. — Research Station, Research 

 Branch, Canada Agriculture, University Sub Post Office. SASKA- 

 TOON. Sask.. Canada 



a. The quantitative and qualitative requirements of immature stages for 

 amino acids and the intermediary metabolism of these amino acids. 

 Oryzaephilus surinamensis (Silvanidae, Coleoptera), Melanoplus san- 

 gainipes (Acrididae, Orthoptera) , Ctenicera destructor (Elateridae, 

 Coleoptera) 



b. The effects of anti-metabolites on development and morphology. Ory- 

 zaephilus surinamensis (Silvanidae, Coleoptera), Melanoplus sanguini- 

 pes (Acrididae, Orthoptera), Ctenicera destructor (Elateridae, Coleop- 

 tera) 



DAWID, I. Ph.D. — Dept. of Embryol., Carnegie Inst, of Washington, 115 

 W.'University Parkway, BALTIMORE Md. 21210, U.S.A. 

 a. Deoxyribonucleic acid synthesis during early development. Rana 

 pipiens, Xenopus laevis (Anura) 



DE, A. M.Sc. — Dept. of Zool., Presidency Coll., College St., CALCUTTA 



12, India 



DEAN, D. Ph.D. — Marine Research Laboratory, Univ. of Connecticut, 



NOANK, Conn. U.S.A. 

 a. Descriptive morphology of larvae. Streblospio benedicti, Boccardia 



uncata, Sabellaria vulgaris (Sedentaria, Polychaeta), Harmothoe exte- 



nuata (Errantia, Polychaeta) 

 DEARDEN, M. B.Sc. — Stretford Technical Coll., Talbot Rd., Stretford, 



MANCHESTER. England 



— Depts. of Botany and Zool. (Genet. Lab.), Univ., MANCHESTER 



13, England 



a. Development of the cephalic complex in larva and pupa (microscopical 

 examination, effects of dietary and other external influences, pharma- 

 cological effects, tissue culture). Drosop/zr'/a melanogaster (Diptera) 



49 



