EDWARDS R. G. B.Sc. Ph.D. — Inst, of Animal Genet., Univ. Dept of 

 Genet., King's Buildings, West Mains Rd, EDINBURGH 9, Scotland 



a. Heteroploidy and parthenogenesis. Mus musculus (Rodentia) 



b. Relations between sperms and eggs at fertilization. Mus musculus. Rat- 

 tus natalensis, R. norvegicus (Rodentia) 



c. Investigation of gametogenesis and of early embryonic development 

 using radioactive tracers. Mus musculus (Rodentia) (in collaboration 

 with J. L. SIRLIN) 



EEDEN } A. van M.Sc, D.Sc. — Dept van Dierkunde, Potchefstroom 



Univ., POTCHEFSTROOM. Suid-Afrika 



(no embryological work in progress) 

 EGUCHI, G. B.Sc. — Biol. Inst., Fac. of Sci., Nagoya Univ., Chigusa-Ku, 



NAGOYA, Japan 

 a. The lens regeneration in the cyclopean monster. Triturus pyrrhogaster 



(Utodela) 

 ELBERS, P. F. M.Sc. — Centrum voor Electronenmicroscopie, Janskerk- 



hof 3, UTRECHT. Holland 



a. Electron microscopical investigation on growth and differentiation of the 

 egg. Limnaea stagnalis (Gastropoda) 



b. Electron microscopical investigation on the influence of Li ions on the 

 egg. Limnaea stagnalis (Gastropoda) 



c. Electron microscopical investigation on the influence of Li ions on the 

 egg. Paracentrotus lividus (Echinodermata) 



ELLIS. R. — Dept of Anat., Harvard Univ.. Med. School. 25 Shattuck St. 



BOSTON 15, Mass.. U.S.A. 

 ELSDALE, T. R. B.Sc. — Dept of Zool. and Comp. Anat.. The Univ. 



Museum, OXFORD, England 

 a. Nuclear transplantation. Xenopus laevis, Discoglossus pictus etc. (Anu- 



ra) (in collaboration with M. FISCHBERG) 

 EMANUELSSON. H. Fil.lic. — Zoophysiol. Inst.. Univ. of Lund. LUND, 



Sweden 

 ENDO, Y. M.Sc. — Biol. Lab., Keio Univ., YOKOHAMA, Hiyoshi. Japaa 



a. Electron microscopical study of fertilization. (Echinoidea) 



b. A study of the fertilization membrane. (Echinoidea) 



ENEMAR, E. A. W. Fil.lic. — Embryol. Dept, Zool. Inst, of the Univ. of 



Lund, LUND, Sweden 

 a. The development of the pituitary (Rodentia) 

 ENGELBRECHT, D. van Z. M.Sc. — Zool. Inst.. Univ. of Stellenbosch. 



STELLENBOSCH, South Africa 

 ENGELMANN, F. Dr Phil. — Zool. Inst, der Univ. Bern. Sahhstr. 8. 



BERN. Schweiz 

 a. Untersuchungen der hormonalen Steuerung'der Hautungen. Leucophaea 



Maderae (Orthoptera) 

 ENGLANDER. H. Dr Med.. Dr rer.nat. — Zool. Inst, der Univ. Koln. 



Kerpenerstr. 13, KoLN-LINDENTHAL, Deutschland 

 a. Regionalspezifische Induktion. (Urodela) 

 ERENQIN. Z. Med.Veter.Dr. Prof. — Inst, of Histol. and Embryol., Veter. 



Coll. of the Univ., ANKARA, Turkey 



(no embryological work in progress) 

 EVANS, D. R. B.S., M.S. — Dept of Biol.. The Johns Hopkins Univ., 



Charles and 34th Sts, BALTIMORE 18. Md. U.S.A. 



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