a. A study of the differentiation of melanophores in the skin under the 

 stimulation of melanin debris, various extracts of melanin material, and 

 certain amino acids and other small molecular weight substances (whole 

 larvae and organ cultures of larval skin). Taricha torosa (Urodela) 



h. A study of the spreading of melanophores into the flank skin of white 

 animals following the rejection of grafted skin from black animals. Sire- 

 don (— Ambt} stoma) mexicanum (Urodela) 

 DUPRAT (ESCUDIfi), Mrs. A.-M. Lic.es Sci. — Lab. de Biol, gener.. 

 Fac. des Sci., 118 Route de Narbonne. TOULOUSE, France 



a. Culture in vitro de cellules embryonnaires diploides et heteroploi- 

 des. (Amphibia) 



h. Etude autoradiographique du metabolisme des germes heteroploides 

 letaux. Pleurodeles waltlii (Urodela) (en collaboration avec J. C. 

 BEETSCHEN) 

 DURANTE. Miss M. C. Dr.Sc. — 1st. di Zool., Via Archirafi 18, PALER- 

 MO, Italia 



a. Cholinesterase, dipeptidase and other enzymes in embryonic develop- 

 ment. (Ascidiae: Pisces) 

 DUSPIVA. F. Dr.. Prof. — Zool. Inst, der Univ.. Physiol. Lehrstuhl. 

 Berlinerstr., HEIDELBERG. Deutsche Bundesrepublik 



a. Localization of enzymes within the embryo and in subcellular fractions. 

 (Insecta: Amphibia) 



h. Protein differentiation, ontogeny of enzyme patterns. (Insecta: Amphi- 

 bia) 



c. Energy metabolism and metabolism of nucleic acids, nucleotides, cofac- 

 tors during development. (Teleostei; Amphibia) 



d. Cell-physiological mechanisms of malformation in early development. 

 (Amphibia) 



DUTRIEU. Miss J. Dr.es Sci. — Lab. de Physiol, gener., Fac. des Sci. de 

 Bordeaux, 40 Rue Lamartine, TALENCE (Gironde), France 

 a. Metabolisme des glucides (trehalose) au cours du developpement. 

 Artemia salina, Lepidtirus apus (Anostraca, Crustacea). Calliphora 

 erythrocephala (Dipfera), Bomhyx mori (Lepidoptera) 



t DUYVENE DE WIT. J. J. Dr. Phil. Nat., Prof. — Dept. of Zool.. Univ. 

 of O.F.S., BLOEMFONTEIN. Republic of South Africa 

 (deceased) 



DZIALLAS. P. R. Dr.med., Prof. — Anat. Inst, der Univ., Pettenkoferstr. 

 11, MQNCHEN 15, Deutsche Bundesrepublik 



EAKIN. R. M. Ph.D., M.I. I.E., Prof. — Dept. of Zool.. Univ. of California. 

 BERKELEY 4, Calif.. U.S.A. 



a. Determination of neural plate, sucker and hypophysis. Hyla regilla 

 (Anura) 



b. Electron microscopy of induction systems. Hyla regilla (Anura) 



c. Development of photoreceptors. Peripatus spec. (Onychophora) , 

 (Gastropoda) , ('and other Invertebrata) 



57 



