Ik 47 Johns 



IKUSHIMA, N. — Lab. of Embryol. and Exp. Morphol.. Zool. Inst., Dept 

 of Sci., Kyoto Univ., KYOTO, Japan. 



a. Electric potential and pH of early embryo. Triturus pyrrhogaster 

 (Amphibia) 



b. Redoxpotential of early embryo. Triturus pyrrhogaster and Rhacophorus 

 schlegelii (Amphibia) 



IMMERS, J. Mag. rer. nat. — Wenner-Grens Inst, for exper. Biol., 

 Norrtullsgatan 16, STOCKHOLM 23, Sweden. 



a. Biochemistry of fertilization, espec. on carbohydrates metabolism. 

 Echinus esculentus, Echinocardium cordatum, Paracentrotus lividus, 

 Strongylocentrotus droeb., etc. (Echinodermata) 



b. Enzymatic destruction of jelly coat substances of the eggs. Echinocardium 

 cordatum. Echinus esculentus, Brisopsis lyr., etc. (Echinodermata) 



INCE, Miss F. E. M.Sc. — Dept of Zool., Bedford Coll., Regents Park, 

 LONDON. England, 

 (no data received) 



ISHIKAWA, M. M.A. (Rigakushi) — The Sugashima Marine Biol. Stat., 

 Nagoya Univ., Sugashima-mura, Shima-gun, Mie-ken, Japan, 

 a. Physiological studies on the fertilization and parthenogenesis of the sea 

 urchin eggs. Strongylocentrotus pulchevrimus (Echinoidea) (in col- 

 laboration with M. SUGIYAMA) 



JAFFE, L. F. B.S. — Dept of Embryol., Div. of Biol., California Inst, of 

 Technol.. PASADENA 4, Cal., U.S.A. 

 a. Separation, en masse, of early living sea-urchin blastomeres into size 

 groups, for physico-chemical investigations. Lytechinus pictus (Echinoi- 

 dea) 



JAGER, K. W. — Anat.-Embryol. Lab., Oostersingel 69, GRONINGEN, 

 Holland, 

 a. Development of the internal structure of muscles (especially the m. triceps 

 surae). Homo (Mammalia) 



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

 UPPSALA, Sweden. 

 a. Larval development. (Polychaeta) 



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



a. Development of the inferior olive in Cetacea. Balaenoptera physalus 



b. The morphogenesis of the cetacean cerebellum. Balaenoptera physalus 

 (Mammalia) 



JANSSENS, J. — Lab. d'Embryol., Inst, de Zool., Univ. de Louvain, 71, Rue 



de Namur, LOUVAIN, Belgique. 

 a. Development of the neural system of Balanoglossus kowalewskii. (En- 



teropneusta) (in collaboration with G. VANDEBROEK) 

 JOHNELS, A. G. Phil. Dr — Zootom. Inst., Univ. of Stockholm, 116, 



Drottninggatan, STOCKHOLM, Sweden. 



a. Development and morphology of the skeleton of the head. Petromyzon 

 (Cyclostomes) 



b. Observations on the connective tissue of the head. Petromyzon (Cyclo- 

 stomata) 



JOHNS, B. A. E. M.B., Ch.B., M.R.C.P. — Dept of Anat., Fac. of Med.. 

 Univ. of Sheffield. SHEFFIELD, England. 



a. Development of the chondrocranium. Homo (Mammalia) 



b. Development and histogenesis of oesophageal glands. Homo (Mammalia) 



