c. Time regularities of the maturation process; temperature effect upon 

 maturation processes in vivo and in v i t ro. (Acipenseridae, 

 Chondrostei) (in collaboration with S. G. VASSETZKY and DAVI- 

 DOVA) 



d. Cell division: duration, mechanism, relation to the process of differenti- 

 ation. (Amphibia) , (Acipenseridae, Chondrostei) 



DEUCHAR. Miss E. M. M.A.. Ph.D., M.I.I.E. — Dept. of Anat. and 

 Embryol., Univ. Coll. London. Gower St., LONDON W.C.I. England 



a. Cellular uptake of amino-acids into proteins studied autoradiographi- 

 cally Xenopus laevis (Anura), Gallus domesticus (Aves) 



b. Effects of amino-acid analogues on development of embryonic tissues. 

 Callus domesticus (Aves) (in collaboration with Miss A. M. L. DRY- 

 LAND) 



c. Changes in types of RNA in different developing tissues and in the 

 nucleotide base composition. Xenopus laevis (Anura) (in collaboration 

 withM. J. EVANS) 



DEVILLERS. Ch. M.LLE., Prof. — Lab. d'Anat. et d'Histol. comp., Quai 7 

 St. Bernard, PARIS Ve, France 

 a. Origine de I'energie utilisee au cours du developpement de I'oeuf. Salmo 



fario, S. irideus (Teleostei) 

 h. Recherches sur les mouvements cellulaires au cours de la gastrulation. 



Rana pipiens (Amphibia) 

 c. Respiration de I'oeuf. Salmo irideus, Brachydanio rerio (Teleostei) 

 DEVIS. Miss R. J. M.Sc. — Dept. of Zool, Univ. of the Witwatersrand, 

 Milner Park, JOHANNESBURG, Republic of South Africa 

 a. An electronmicroscopic study of development. (Ascidiae) 

 h. An electron microscopic study of differentiating ectoderm. Rana ango- 

 lensis (Anura) 

 Di BERARDINO, Miss M. A. B.S.. Ph.D., M.LLE. — Inst, for Cancer 

 Research, 7701 Burholme Ave., PHILADELPHIA. Pa. 191 1 1, U.S.A. 



a. Investigations of germ plasm in relation to nuclear transplantation. Rana 

 pipiens (Anura) 



b. Establishment of karyotype and an investigation into its stability during 

 embryonic differentiation. Rana pipiens (Anura) 



c. Chromosome studies of renal adenocarcinoma. Rana pipiens (Anura) 



d. The role of tumor nuclei and nuclei of normal cells in nuclear differenti- 

 ation. Rana pipiens (Anura) 



DICENTA BALLESTER. C. Dipl.Med. — Lab. d'Embryol. exper.. Inst. 

 d'Anat., Fac. de Med., Univ. de Geneve, 20 Rue de I'Ecole de Medecine. 

 GENfiVE. Suisse 

 a. Regulative capacity of the embryonic axis after various kinds of reversal 

 experiments of the Hensen's node. Gallus domesticus (Aves) 

 DICK, D. A. T. M.B., Ch.B., M.A.. D.Phil. — Dept. of Human Anat.. Univ. 

 Museum, South Parks Road. OXFORD. England 

 a. Study of ion fluxes in oocytes. Bufo bufo (Anura) (in collaboration with 

 D. J. FRY) 

 DICKSON. A. D. M.A., M.D. — Dept. of Anat.. Dalhousie Univ.. HALI- 

 FAX. Nova Scotia, Canada 

 a. Effect of ovarian hormones upon pre-implantation development. Mus 

 musculus (Rodentia) 



53 



