b. Experimental studies on fiber pattern formation in the medulla oblon- 

 gata. Ambystoma spec. (Urodela) 



c. The mechanism of neurulation. Ambystoma spec. (Urodela) (in colla- 

 boration with Mrs. A. E. JACOBSON) 



JACOBSON, M. B.Sc, M.B., Ch.B., Ph.D. — Dept. of Physiol.. Univ. 

 Med. School Teviot Place. EDINBURGH 8. Scotland 



a. Regeneration of the optic nerve. (Amphibia) 



b. Mechanism of development of connections in the nervous system. 

 (Amphibia) 



JAFFE. L. F. B.S.. Ph.D.. Prof. — Biol. Div.. Univ. of Pennsylvania. 



PHILADELPHIA, Pa. 19104, U.S.A. 

 a. Development of cell polarity; studied via electrical measurements, group 



effects, rheotropism and chemotropism. Fucus furcatus (Algae) 

 JAFFEE, O. C. B.A., M.S., Ph.D. — Dept. of Biol., State Univ. of New 



York at Buffalo. BUFFALO 14, N.Y., U.S.A. 

 JAGER, B. de Prof. — Div. of Fisheries, Beach Rd.. Sea Point, CAPE 



TOWN, Republic of South Africa 



( no embryological work in progress ) 

 JAGER, J. N. Med.drs. — Div. of exper.MorphoL. Dept. of Anat. and Em- 



bryol., Mauritskade61, AMSTERDAM O.. Netherlands 

 a. Studies on the teratogenic effect of anti-metabohtes. Gallus spec. (Aves) 



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

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



UPPSALA, Sweden 



a. Larval development. (Pogonophora) 



b. Comparative study of larval development. (Invertebrata) 



JAMES, D. W. M.B., B.S. — Dept. of Anat. and ErabryoL. Univ. Coll. 



London. Gower St.. LONDON W.C.I. England 

 a. Healing of skin wounds. Rattus spec, Cavia spec. (Rodentia), Orycto- 



lagus spec. (Lagomovpha) 

 JANSEN, J. M.D.. M.I.I.E. — Anat. Inst., Univ. of Oslo. Karl Johansgt. 47. 



OSLO. Norway 



a. Development of inferior olive. Balaenoptecus physalus, B. musculus 

 (Cetacea) 



b. Development and homology of the central cerebellar nuclei. Balaenop- 

 terus physalus, B. musculus (Cetacea) 



JAYLET, A. Lic.es Sci. — Lab. de Biol, gener., Fac. des Sci., 118 Route de 

 Narbonne, TOULOUSE. France 

 a. Action des r ayons X sur le developpement, (Urodela) 

 h. Etude d'un facteur recessif semi-letal, ac. Pleurodeles waltlii (Urodela) 

 (en collaboration avec J. C. BEETSCHEN) 

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

 PRAHA 2. Czechoslovakia 



a. Quantitative changes of tissue, cellular and subcellular structure in nor- 

 mal and pathological ontogenesis of the central nervous system. (Ver- 

 tebrata) 



b. Structure of the internal limiting membrane of the developing central 

 nervous system. Gallus domesticus (Aves) 



c. Mechanism of neurulation. Gallus domesticus (Aves) 



99 



