APR 29 1924 
OBSERVATIONS ON HOTARU-IKA 
WATASENIA SCINTILLANS. 
By 
Madoka Sasaki, Rigahishi. 
Professor of Zoology, Fishery Department, College of Agriculture, 
Tohoku Imperial University, Sapporo, Japan. 
(With 3 plates and i text figure.) 
PREFACE. 
I had an opportunity to observe the living state of Hotaru-ika Wata- 
Senia SCintillans (Bc^^t'SJ) and the actual scene of fishing for them at 
Namerikawa, Toyama Prefecture in 191 3. I was there twice in that year, 
first in spring from April 17 to May 10, and again in summer, from July 
21 to August 23. 
The present investigation embodies the studies concerning mainly the 
habits of the Hotarn~ika. The observations on their living state as well 
as the references to the fishery were made in the visits mentioned above 
and the materials used in this study consist of the specimens obtained 
there as well as of those from other localities. 
The fishing season of Hotaru-ika in Toyama Bay and its coasts is 
commonly late April and the Avhole of May. The coast where this fishing 
A 
is carried on, extends from Ota, Himi-gun, Etchu Province to Itoigawa, 
Echigo Province, which forms the deepest inlet of the Japan Sea in Honshu. 
l) I express my warmest thanks to Mr. K. Koishi, Principal of tlie local Fishery Institute, 
Namerikawa, and his staff, especially Mr. S. Matsuno, for their efforts in helping me in every 
way in my investigation. 
[ Jour, of the College of Agr., Tohoku Imp. Univ., Sapporo, Vol. VI. Pt. 4, November 1914.] 
