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FREE INSTITUTE OF SCIENCE 
ON THE LIFE HISTORY OF AN ECONOMIC CUTTLEFISH OF JAPAN 
SEASONAL AND DAILY MIGRATION 
In all the coasts which I have visited, it is said that every year schools 
or shoals of the cuttlefish come 
from south or west and go away. 
to north or east as a migratory 
fish does. For instance, in Sado, 
it is said, the schools appear for 
the first time in the Noto Penin- 
sula in the early part of May, 
reach the west coast of Sado in the 
middle part of the same month, 
and then come to its east coast 
towards the end of the month. 
Thereafter the schools turn north- 
ward to Hokkaidé. In Oki the 
people say that the schools are seen 
some ten days after their appear- 
ance in Utsuryoté, and then after 
a fortnight the fishing takes place 
around the Noto Peninsula. In 
Utsuryot6, fishermen say, the cut- 
tlefish come over from Tsushima, 
while the people of the latter isle 
believe the home of the animal to 
be in Kiushiu. Taken together, 
the information from these sources 
points to the conclusion that the 
animal migrates northwards from 
Kiushiu as far as into Hokkaido. 
In spite of my efforts, however, I 
could not gather reliable data to 
support this conclusion. It is true, 
so far as concerns the beginning of 
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UTsURYOTO 
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18G., 2, 
Map showing the density of distribution of Niban- 
zurumé (Ommastrephes sloani pacificus): compiled 
from the Statistical Reports of the Bureau of Agri- 
culture and Commerce. 
the fishing season, which grades in time from south or west to north oreast. In 
fact the season begins, on the whole, earlier and ends later in the southern seas 
