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



DAN. K. Ph.D., Prof. — Embryol. Section, Dept of Biol., Fac. of Sci., 

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

 a. Exogastrulation without change in determination. (Echinoidea) 

 h. Mitotic spindle isolation and analysis. (Echinoidea) 



c. Formation of mitotic apparatus and SH-proteins. (Echinoidea) 



d. Mechanism of polar body formation. (Mollusca) 



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

 Sci., Via Loredan 10, PADOVA, Italia 



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



b. Embryology. (Teleostei, Ganoidea and Amphibia) 

 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 and other Ani- 

 malia (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 (Primates) 



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

 laboration with H. A. SNELLEN, Miss A. DEKKER and Miss H. C 

 v. INGEN) 



DAVIES, D. H. M.Sc. — Division of Fisheries, Beach Road, Sea Point, 

 CAPE TOWN, South Africa 

 a. Embryology. Sardinops ocellata (Pappe) (Isospondyli, Neopterygii) 



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.) 



DAWSON, A. B. Prof. — Biol. Lab., Harvard Univ., Divinity Ave, CAM- 

 BRIDGE 38, Mass.. U.S.A. 



DE CESARE, Miss. I. Dr Nat.Sci. — 1st. die Anat. Comp., Via Belmeloro 8. 

 BOLOGNA (103), Italia 

 a. Action of antimitotics on early development. (Amphibia) (in collaboration 

 with P. PASQUINI) 



DECK, }. D. B.S., Ph.D. — Dept of Anat., School of Med., Univ. of Vir- 

 ginia. CHARLOTTESVILLE, Va., U.S.A. 



a. Study of innervation of larval forelimbs which have regenerated after 

 transplantation with reversed proximo-distal polarity. Ambystoma punc- 

 tatum (Urodela) 



b. Study of relationship between innervation and regeneration of larval 

 limbs with reversed proximo-distal polarity. Ambystoma punctatum 

 (Urodela) 



DEKKER, Miss A. Physician — Anat.-Embryol. Lab. of the Univ., Fac. 



of Med., Wassenaarseweg, Boerhaavekwartier, LEIDEN, Holland 

 a. Heart and vessels in congenital malformations. Homo (Primates) (in 



collaboration with J. DANKMEIJER,. H. A. SNELLEN and Miss H. 



C.v. INGEN) 

 DELMAS, A. Prof. — Lab. des Traveaux Anat., Fac. de Med. Nouvelle, 



45 Rue des Sts Peres, PARIS Vie, France 



27 



