Dan-Den 



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

 mental conditions. ( Echinodermata, Mollusca, Annelida) 



b. Study of egg-membrane lysin of spermatozoa. (Mollusca) 



DAN, K. Ph.D., M.I. I.E., Prof. — Embryol. Section, Dept. of Biol., Fac. of 

 Sci., Tokyo Metropolitan Univ., Setagaya-ku, TOKYO, Japan 



a. Mitotic spindle isolation and analysis. ( Echinoidea) 



b. Mechanism of polar body formation. (Mollusca) 



c. Protein SH in the ova. (Echinoidea) 



D'ANCONA, U. Dr. Nat. Sci., M.I.I.E., Prof. — 1st. di Zool. e Anat. comp., 



Fac. di Sci., Via Loredan 10, PADOVA, Italia 

 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 



a. Normal and abnormal development of the heart. Homo sapiens and other 

 Animalia (in collaboration with J. A. LOS) 



b. Development of thyroid gland and teeth (investigations with radio-active 

 isotopes), (in collaboration with P. J. BROUWER) 



c. Development of uterus. Homo sapiens (Primates) 



d. Heart and vessels in congenital malformations. Homo sapiens (Primates) 

 (in collaboration with H. A. SNELLEN, Miss A. DEKKER and Miss 

 H. C. van INGEN) 



e. Development of the stomach. Homo sapiens (Primates) (in collaboration 

 with M. MIETE) 



D'ANNA, T. Ph.D. — 1st. di Zool., Via Archirafi 18, PALERMO, Italia 

 a. Radioautographic investigations in embryonic development. (Ascidiae, 



Urochordata) 

 DARLINGTON, D. M.B., Ch.R — Dept. of Anat., The Med. School, 



Univ. of Birmingham, Edgbaston, BIRMINGHAM 15, England 

 a. Experimental investigation of post-natal development of masticatory 



apparatus. (Rodentia) 

 DASGUPTA, B. M.Sc, Ph.D. — Biol. Lab., Darjeeling Government Coll., 



DARJEELING, West Bengal, India 

 a. Cytochemical investigations on development. Plasmodium gallinaceum, 



P. cunomolgi, Eimeria stiedae, Hepatozoon spec. (Sporozoa) 

 DAVIES, D. H. M.Sc, Ph.D., Prof. — Marine Biol. Research Inst., P.O. 



Box 736, DURBAN, S. Africa 



(no embryological work in progress) 

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



Sheffield, SHEFFIELD, England 

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



(in collaboration with E. T. B. FRANCIS, Dept. of Zool.) 

 DAVIS, Miss R. J. B.Sc. (Hon.) — Dept. of Zool., Univ. of the Witwaters- 



rand, Milner Park, JOHANNESBURG, South Africa 

 a. An electron miscrocopic investigation of early development. (Teleostei) 

 DE BEER, Sir G. R. F.I.I.E., Prof.— British Museum (Natural History), 



Cromwell Road, LONDON S.W. 7, England 

 DECHAMBE, Miss C. — Lab. de Biol, anim., Fac. des Sci. de Bordeaux, 



351, Cours de la Liberation, TALENCE (Gironde), France 



a. Modalites et facteurs de formation de l'ostium. (Anura) 



b. Etude experimental de la metamorphose de l'appareil excreteur. (Anura) 



32 



