b Abnormalities in closure of the ventral body wall. Homo sapiens (Primates) 



c Exstrophy of the urinary bladder. Homo sapiens (Primates) 



DESSOUKY. D. A. M.D., Ph.D. — Dept. of Anat., School of Med., Georgetown Univ.. 



3900 Reservoir Road, N.W., WASHINGTON, D.C. 20007, U.S.A. 

 a Development and differentiation of skeletal muscle, electron microscopy. Gallus domesticus 



(Aves) 

 b Development of motor-end plate and relation to differentiation of the skeletal muscle. 



Gallus domesticus (Aves) 

 DE TERRA (WHITTAKER). Mrs. N. Ph.D. — Inst, for Cancer Research. 7701 Burholme 



Ave., PHILADELPHIA, Pa. 19111. U.S.A. 

 a Morphogenesis and nucleo-cytoplasmic interactions studied by microsurgery, histochemistry 



and autoradiography. Stentor coeruleus (Ciliata) 

 DETH, J. H. M. G. van M.D. — Dept. of Anat. and Histol., Univ. of Adelaide. ADELAIDE. 



S.Australia 5000, Australia 

 a Teratogenesis by hormones. Gallus domesticus (Aves). Rattus norvegicus (Rodentia) 

 h Hormonal influences on sex determination. Gallus domesticus (Aves) 



• DETTLAFF, Mrs. T. A. Dr.biol.sci., Prof. — Inst, of Developm. Biol., Acad, of Sci. ol 



the U.S.S.R.. Vavilov St. 26, MOSCOW V-133, U.S.S.R. 

 a The nature of the specificity of oocyte nuclei in the process of oocyte maturation. 



(Amphibia) 

 b Effect of gonadotropins and changes in the germinal vesicle and in the oocyte cytoplasm 



during maturation (effect of actinomycin and puromycin on macromolecular synthesis). 



(Acipenseridae, Chondrostei; Amphibia) (in collaboration with S. I. DAVIDOVA and 



J. G. SCHMERLING) 

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



in vivo and in vitro. (Amphibia) (in collaboration with T. RUDNEVA) 

 d Cell division: duration, mechanism, relation to the process of differentiation. (Acipenseri- 

 dae, Chondrostei; Amphibia) 

 DEUCHAR, Miss E. M. Ph.D. — Dept. of Anat. and Embryol., Univ. Coll. London, Gower 



St.. LONDON W.C.I, England 

 a Changes in types of RNA in different developing tissues and in the nucleotide base 



composition. Xenopus laevis (Anura) 

 DEUTSCH, G. Dr.med. — Centrul de Embriol. Norm. §i Patol., Acad. Republ. Social, 



Romania, Bui. M. Viteazul 24, TIMI§OARA. Rumania 

 a Placental blood circulation. (Mammalia) 

 b Embryonic and adult kidney metabolism. (Mammalia) 



• DEVILLERS, Ch. Prof. — Lab. d'Anat. comp., 7 Quai St. Bernard, PARIS Ve, France 

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



(Teleostei) 

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



• DE VINCENTIIS, M. Prof . — Catt. di Istol. ed Embriol., Univ. di Camerino, CAME- 



RINO, Italia 

 DHAINAUT, A. — Lab. de Zool., Fac. des Sci., B.P. 36, 59-LILLE-Distribution. France 

 a Ovogenese; ultrastructure et autoradiographie a haute resolution. Nereis diversicolor, N. 



pelagica (Annelida) 

 DHOUAILLY, Miss D. Dr. — Lab. de Zool., Fac. des Sci. de Grenoble, Domaine Univer- 



sitaire, 38-SAINT-MARTIN-d'HERES, France 

 a Experimental analysis of the specific differentiation of the neoptile feather in chimaeric 



combinations between two species of birds. Gallus domesticus. Anas boschas (Aves) 



• DiBERARDINO, Miss M. A. Ph.D., Prof . — Dept. of Anat., Women's Med. Coll. and 



Hosp. of Penna., Henry Ave. and Abbotsford Rd., PHILADELPHIA, Pa.. U.S.A. 



a Nuclear, chromosomal and cytoplasmic changes during development, Rana pipiens (Anura) 



DICK, D. A. T. Ph.D. — Dept. of Human Anat.. Univ. Museum. South Parks Road, OX- 

 FORD, England 



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



DICKSON, A. D. M.D. — Dept. of Anat., Health Sci. Centre, Univ. of Western Ontario, 

 LONDON, Ontario, Canada 



a Effect of ovarian hormones upon pre-implantation development. Mus musculus (Rodentia) 



DICKSON. D. H. B.A. — Dept. of Zool.. Coll. of Sci., Univ. of Western Ontario, LON- 

 DON. Ont., Canada 



a Effects of chloramphenicol on developmental processes. (Teleostei) 



DIDIER (MARTIN), Mrs. E. Lic.es Sci. — Lab. de Biol. Anim., 1 Av. Vercingetorix, 63 

 CLERMONT-FERRAND. France 



DIEHL, F. A. Ph.D. — Dept. of Biol., University of Virginia, Gilmer Hall, CHARLOTTES- 

 VILLE, Va. 22903, U.S.A. 



a Problems of development: cell and tissue migrations; the roles of individual cell types 

 during morphogenesis; the synthesis of extracellular mesoglea and perisarc and their role 

 in development. Cordylophora caspia (Hydroidea) 



41 



