Cza 23 Dav 



CZAPIK, Miss A. D.Sc. — Zool. Dept of the Jagellonian Univ., St Anne 6, 

 KRAKOW (Cracow), Poland, 

 a. Development of the heart. Agelastica alni L. (Coleoptera) 



DAINTY, J. — Inst, of Anim. Genet., Univ. Dept of Genet.. King's Buil- 

 ding's, West Mains Rd. EDINBURGH, Scotland (U.K.) 

 a. Studies on the permeability of undifferentiated and differentiated tissues, 

 using radioactive tracers. Various species (Amphibia) (in collaboration 

 with Miss E. M. DEUCHAR) 



DALCQ, A. M. F.I. I.E., M.D.. Prof. — Lab. d'Anat. et d'Embryol.. Fac. dc 

 Med. de I'Univ., 97 Rue aux Laines, BRUXELLES. Belgique. 



a. Cytochemistry of early stages of development. (Rodentia and Insecti" 

 vora) (in collaboration with coworkers) 



b. Cytochemistry in various buds (limbs, tail, genitalia). 



c. Regulation in blastula and gastrula stage. (Urodela and Anura) (in col- 

 laboration with coworkers) 



DALTON. H. C. Ph.D., Asst Prof. — Dept of Zool., New York Univ.. 

 NEW YORK, N.Y.. U.S.A. 

 a. Gene action controlling development of pigmentation in white and dark 



strains. Ambystoma mexicanum (Urodela) 

 h. Role of embryonic pituitary activity in development of pigment patterns. 

 Ambystoma mexicanum (Urodela) 

 DAMAS, H. F. C. Dr Sc. Agr. Zool. — Inst, de Zool. Ed. Van Beneden, 

 Dept Morphol. des Chordes, Fac. des Sci., 22 Quai Ed. Van Beneden. 

 LIEGE, Belgique. 

 a. Etude descriptive et comparative du developpement. Pettomyzon matinus, 

 Lampetra fluviatilis et L. planed (Cyclostomata, Pisces) 

 DAN, Mrs J. C. Ph.D. — Embryol. Section, Dept of Biol.. Fac. of Sci.. 

 Tokyo Metropolitan Univ., Meguro-ku, TOKYO, Japan. 



a. Experimental study of syngamy. (Echinoidea) 



b. Electron-microscope observation of spermatozoa under various experi- 

 mental conditions. (Echinodetmata, Mollusca, Annelida) 



DAN, K. Ph.D., Rigaku Hakushi, Prof. — Embryol. Section, Dept of Biol., 

 Fac. of Sci.. Tokyo Metropolitan Univ.. Meguro-ku. TOKYO, Japan. 



a. Research into causes of form change in early development, from preclea- 

 vage through metamorphosis. (Echinoidea) 



b. Birefringence studies of dividing eggs. (Echinoidea) 



c. Mitotic spindle isolation and analysis. (Echinodea) 

 D'ANCONA, U. Prof. — 1st. di Zool. e Anat. comp., Fac. di Sci., Via 



Loredan 6. PADOVA. Itaha. 

 a. Differentiation of the gonad. (Vertebrata, esp. Pisces) 

 DANKMEIJER, J. Med. Dr, Prof. — Anat.-Embryol. Lab of the Univ. of 



Leyden, Fac. of Med.. Wassenaarseweg, Boerhaavekwartier, LEIDEN, 



Holland. 



(no data received on Nov. !«', 1952) 

 DATKOWNA. H. Dr — Zaktad Anat. Porownawczej U.J. Im. H. Hoyera. 



sw. Anny 6. KRAKOW. Poland. 



(no data received on Nov. 1*'. 1952) 

 DAVIES. F. M.D., D.Sc. Prof. — Dept. of Anat., Fac. of Med.. Univ. of 



Sheffield. SHEFFIELD. England (U.K.) 

 a. Histological studies of conducting system of the heart. (Mammalia) (in 



collaboration with E. T. B. FRANCIS. Dept of Zool.) 



