Ich 47 Jan 



a. Histological changes during the regeneration. Bdellocephala brunnea 

 and Dugesia gonocephala (Tricladidea, Turbellaria) 



b. Reversal asymmetry in the regeneration of the opercula. Hydroides 

 ezoensis (Polychaeta) 



ICHIKAWA. M. Ph.D.. Prof. — Lab. of Embryol. and Exp. Morphol., 

 Zool. Inst.. Dept of Sci.. Kyoto Univ., KYOTO, Japan. 



a. Hormonal mechanism of metamorphosis. Bombijx mori, Luehdorfia ja- 

 ponica, Dictyoploca japonica (Lepidoptera) (in collaboration with co- 

 workers ) 



b. Development of limbs. Triturus pyrrhogaster (Urodela) 

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



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



a. Electric potential and pH of early embryo. Triturus pyrrhogaster (Uro- 

 dela) 



b. Redoxpotential of early embryo. Triturus pyrrhogaster and Rhacophorus 

 schlegelii (Amphibia) 



c. Regional differences of induced structure. 



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

 tullsgatan 16, STOCKHOLM 23. Sweden, 

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

 esculentus, Echinocardium cordatum, Paracentrotus lividus, Strongylo- 

 centrotus droeb.. etc. (Echinoidea) 

 h. Enzymatic destruction of jelly coat substances of the eggs. Echinocar- 

 dium cordatum. Echinus esculentus, Brisopsis lyr., etc. (Echinoidea) 

 INGE. Miss F. E. M.Sc. — Dept of Zool.. Bedford Goll., Regent's Park, 

 LONDON N.W. 1. England (U.K.) 

 a. Study of developm.ent. Arion (Pulmonata, Gastropoda) 

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

 Nagoya Univ., SUGASHIMA-MURA, Shima-gun. Mie-ken, Japan, 

 a. Physiological studies on fertilization and parthenogenesis. Strongylocen- 

 trotus pulcherrimus, Pseudocentrotus depressus (Echinoidea) (in colla- 

 boration with M. SUGIYAMA) 

 ISINGS, J. — Zool. Lab. der Rijks Univ., Janskerkhof 3, UTREGHT. Hol- 

 land. 



a. Analysis of lithium action. Limnaea stagnalis (Gastropoda) (in colla- 

 boration with W. G. BRAAMS. A. G. J. BURGERS, P. F. ELBERS, 

 W. L. M. GEILENKIRGHEN, Miss T. G. M. KOEVOETS, Ghr. 

 P. RAVEN, G. SGHOLTEN and M. VROMAN) 



b. Cytochemistry of hair development. (Mammalia) 



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

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



a. Study of spawning stimuli. Pelvetia [astigiata, Hesperophycus harveyanus 

 (Fucales, Algae) 



b. Using developing eggs, search for gradient in CO2 output. Pelvetia 

 fastigiata, Hesperophycus harveyanus (Fucales, Algae) 



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

 SALA. Sweden, 

 a. Larval development. (Polychaeta) 

 JANSEN. J. M.D. — Anatomical Institute, University of Oslo, OSLO. 

 Norway. 

 a. Development of the inferieur olive. Balaenoptera physalus (Cetacea) 



