Jacobson-Jur 



b. Tissue interactions between ectoderm and mesoderm and between 

 endoderm and mesoderm that affect heart differentiation. Taricha torosa 

 (Urodela) 

 JACOBSON, D.C.-O. Fil.lic. — Zool. Inst., Uppsala Univ., UPPSALA, 

 Sweden 

 a. Determination of the central nervous system. Ambystoma spec. (Urodela) 

 JAFFE, L. F. B.S., Ph.D. — Dept. of Biol., Brandeis Univ., WALTHAM 

 54, Mass., U.S.A. 

 a. Development of polarity of spore; studied by analyzing effects of 

 polarized irradiation. Funaria hygrometrica (Bryophytes) 

 JAFFEE, O. C. B.A., M.S., Ph.D. — Chronic Disease Research Inst., The 

 Univ. of Buffalo, 2211 Main St., BUFFALO 14, N.Y., U.S.A. 



a. The development of the blastula. Cavity formation in hypertonic media, 

 chiefly sucrose. Histochemical studies. Rana pipiens (Anura) 



b. The effect of modified vascular patterns on the development of the heart. 

 Partial or total unilateral removal of the gills. Rana pipiens (Anura) 



JAGER, B. de M.Sc — Div. of Fisheries, Beach Road, Sea Point, CAPE 

 TOWN, South Africa 

 a. Embryology. Trachurus trachurus (Percomorphi, Neopterygii) 

 JAGERSTEN, K. G. M. Fil.Dr., Prof. — Zool. Inst., Uppsala Univ., 

 UPPSALA, Sweden 

 a. Larval development. (Progonophora) 

 JANSEN, J. M.D. — Anat. Inst., Univ. of Oslo, OSLO, Norway 



a. Early development of the hypophysis. Balaenoptera physalus (Cetacea) 

 JAYA, Miss Y. M.B., B.S., Ph.D., Prof. — Dept. of Anat., Gandhi Med. 



Coll., HYDERABAD, A.P., India 

 JELINEK, R. MUDr. — Dept. of Anat., Charles Univ., U nemocnice 3, 



PRAHA II, Czechoslovakia - 

 JIRASEK, J. MUDr. — Embryolog. ustav lekafske fak. Univ. Karlovy, 

 Albertov 4, PRAHA II, Czechoslovakia 



a. Histogenesis of gonads. Homo sapiens (Primates) 



b. Histochemistry in embryology. Homo sapiens (Primates) 



JIT, I. M.B., M.S., Ph.D. — Dept. of Anat, Med. Coll., AMRITSAR, Pun- 

 jab, India 



a. Histogenesis of the gall-bladder. Homo sapiens (Primates) 



b. Level of termination of the spinal cord in the pre-natal period. Homo 

 sapiens (Primates) 



c. Development of the splanchnic nerves. Homo sapiens (Primates) 



d. Prenatal ossification of some bones. Homo sapiens (Primates) 



e. Development of the transverse folds of the rectum. Homo sapiens (Pri- 

 mates) 



JOCHEMS, D. J. — Div. of exp. Morphol., Anat.-Embryol. Inst., Municipal 



Univ. of Amsterdam, Mauritskade 61, AMSTERDAM O, Holland 

 a. Attempts to analyze the differences in regenerative capacity between 



Amphibia and Mammalia. Ambystoma mexicanum (Urodela) , Mus spec. 



(Rodentia) (in collaboration with H. A. L. TRAMPUSCH) 

 JOHANSSON, A. S. Dr., Prof. — Zool. Lab., Univ. of Oslo, OSLO-Blin- 



dern, Norway 



(no embryological work in progress) 

 JOHNELS, A. G. Phil. Dr. — Swedish Museum of Nat. Hist., Vertebrate 



Dept., STOCKHOLM 50, Sweden 



64 



