SEA-FISHERIES LABORATORY. 948 
recovered; 11 fish were taken out to near the South end 
of Isle of Man, but none was recovered; 28 hatchery 
plaice were marked and liberated at Port Erin, but again 
none was returned. 
Some experiments were made in Carnarvon and 
Cardigan Bays, dealing in all with 291 plaice. This 
number is too small when one remembers that there is 
far less trawling in this part of the Lancashire and 
Western District than there is North of Holyhead. In 
order to obtain evidence of strictly local migrations, 
many more plaice than the number mentioned would 
have to be marked. The experiments are, however, 
interesting from the point of view of the larger 
migrations, and they may be considered with this in 
mind. 
6. Migrations out from the Irish Sea. Chart VI. 
In considering the larger migrations, one may as 
well regard all the territorial waters extending from 
Anglesey to North from Morecambe Bay as one area, 
and regard the various experiments made during the 
years 1904-8 as forming one experiment; while the 
various small experiments made in Carnarvon and 
Cardigan Bays may also be grouped together. Now, 
looking at the results from this broad standpoint, some 
interesting conclusions emerge from the data :— 
(1) There is a well marked tendency for the larger 
fish set free in the territorial waters North from Anglesey 
to emigrate to the West and South, recaptures being 
recorded from a number of places on the East coast of 
Ireland, from the entrance to St. George’s Channel, and 
from the Bristol Channel. At least 36 fish have been 
so traced, excluding some doubtful records. Hither the 
larger fish set free off the coast of Lancashire and North 
