Notes on the Japanese Myopsida. 



By 



Madoka Sasaki, Rigakushi. 



College of Agriculture, Tôhoku Imperial University, Sapporo. 



WitJi 2 plates and i textfigure. 



In the present paper, the Myopsids alone will be considered, re- 

 serving the remaining groups to future publications. The material 

 consisted principally of the specimens in the Museum of the Science 

 College, Tokyo, in addition to which were examined those preserved 

 in the Imperial Museum I Tokyo), in the Fishery Bureau, in the 

 Fishery Institute of Namerikawa (Toyama Prefecture), in the Fishery 

 Experimental Institute of Takashima (Hokkaido), and in the Sapporo 

 College of Agriculture. 1 ' 



Species known to me at present of the Japanese Myopsida group 

 themselves into thirteen genera represented by forty-four species, of 

 which five arc doubtful and another five are new to science. The list 

 is as follows : — 



1. Euprymna morsei (Verrill). 



2. Euprymna similis n. sp. 



3. [Srpiola ja panica Tilesius & d'Orbigny.] 



4. InioteutJiis inioteuthis (Naef). 



1) I wish here to express my thanks to Professor S. Watase under whose supervi- 

 sion the work was done. I wish also to acknowledge my indebtedness to Professor S. 

 Hatta for various acts of courtesy. My thanks are also due to Professor T. Iwakawa and 

 further to Messrs. T. Kitahara. K. Tago, I. Moriwaki and K. Koishi for kindly placing 

 specimens under their charge at my disposal. 



