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may be continued in the same direction during at least a second 
season. (See table on previous page.) 
There were marked during the summer of 1906, 154 flounders. 
Of these, 30 have been recaptured locally, and 11 in Scottish waters 
-41 altogether, or about 27 per cent. Many, however, were 
captured in the salmon and trout nets on the Northumberland 
coast after a short period of liberation. 
As this is being printed several records have come to hand 
showing a similar migration of the flounders marked in 1907. 
MIGRATIONS OF CRABS. 
There are only two results to add to those previously recorded 
in connexion with the experiment of 1905, viz.:— 
No 702, female, breadth 17* cm., liberated between October 19th 
and November 10th, 1905, at Newbiggin, recaptured July 24th, 
1907, i-mile S. by E. of Todhead Lighthouse, near Catterhne, 
Stonehaven, migration = 100 miles north. 
No. 855, male, breadth 15-9 cm., liberated October 28th, 1905, 
4 miles E. by S. of Craster, recaptured January 1st, 1908, 6 miles 
5 E by S. of Craster in 26-27 fathoms, migration nil. 
It is only necessary to point out with reference to the first of 
these that the migration may be continued in the northerly 
direction during two seasons, and that apparently more than two 
years may elapse between pairing and spawning. The second adds 
further proof to the records we have already obtained pointing to 
the fact that the male crab does not migrate. Both may be cited 
to show once more that several years may intervene between 
successive ecdyses. 
I arranged to get a few lobsters marked in the autumn of 1907 
to see whether, as appears likely, they migrate, as we have proved 
the crab to migrate on the east coast. 
