BEERMANN, W. Dr.rer.nat., MILE., Prof. — Max Planck Inst, fur Biol., 

 Spemannstr. 34, TUBINGEN, Deutsche Bundesrepublik 



a. Development of nucleolus-less embryos, descriptive and biochemical. 

 Chironomus tentans (Diptera) 



b. Reversibility of puffing and differentiation in salivary glands. Chirono- 

 mus tentans (Diptera) 



BEETSCHEN, J. CI. Dr.es Sci., Prof. — Lab. de Biol, gener., Fac. des Sci., 

 118 Route de Narbonne, TOULOUSE (Hte-Gne), France 



a. Recherches cytologiques, embryologiques et genetiques sur l'heteroploidie 

 experimentale. (Amphibia) 



b. Hybridation interspecifique. (Amphibia) 



c. Alterations de la morphogenese dans la descendance aneuplo'ide des 

 individus triploides. Pleurodeles waltlii (Urodela) 



d. Etude autoradiographique du metabolisme des germes heteroploi'des le- 

 taux. Pleurodeles waltlii (Urodela) (en collaboration avec Mrs. A. M. 

 DUPRAT) 



e. Action de l'eau lourde (DoO) sur le developpement embryonnaire et 

 larvaire. (Amphibia) 



BELKA-GRZYBEK, A. Mgr. — Dept. of Gener. Biol., Silesian Acad, of 

 Med., Rokitnica, ZABRZE 8, Poland 



a. Restoration of the surrenal gland after experimental injury. Mus muscu- 

 lus (Rodentia) 



b. Cytological and histochemical investigations on the regenerating tail. 

 Xenopus laevis (Anura) 



BELL, E. B.A., M.Sc, Ph.D. — Dept. of Biol., Massachusetts Inst, of 

 Technol., CAMBRIDGE 39, Mass., U.S.A. 



a. Development of skin and feathers. Gallus gallus (Aves) 



b. Biochemical and biophysical analysis of keratin synthesis in development 

 of skin and feathers. Gallus gallus (Aves) 



c. Protein synthesis, RNA and DNA synthesis during development; their 

 relation to cytodifferentiation. Gallus gallus (Aves) 



BELL, L. G. E. B.Sc, Ph.D., A.R.I.C, M.I.Biol. — Dept. of Zool., King's 



Coll., Strand, LONDON W.C. 2, England 

 a. Descriptive, experimental and physiological embryology. Ciona intesti- 



nalis (Ascidiae), Xenopus laevis (Anura) 

 BELLAIRS, A. d'A. D.Sc. — Dept. of Anat., St. Mary's Hosp. Med. School, 



LONDON W. 2, England 



a. Morphogenesis of skeleton. (Reptilia; Aves; Mammalia) 



b. Embryonic membranes. (Reptilia) 



BELLAIRS, Mrs. M. R. B.Sc, Ph.D., M.I.I.E. — Dept. of Anat. and Em- 

 bryol., Univ. Coll. London, Gower St., LONDON W.C. 1. England 

 a. An electron microscopical study of oogenesis. Gallus domesticus (Aves) 

 (in collaboration with Miss M. L. GREENFIELD) 



BELOUSOV, L. W. Cand.biol.sci. — Dept. of Embryol., Fac. of Biol., Mos- 

 cow Univ., MOSCOW V-234, U.S.S.R. 

 a. Cell migration and cell proliferation in morphogenesis. Relations between 

 cellular activities and the species-specific pattern of the whole organism. 

 (Hydrozoa) 



BENAZZI (LENTATI), Mrs. G. — 1st. di Zool. e Anat. comp. dell'Univ., 

 Via A. Volta 4, PISA, Italia 



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