whose e
'Yet another new migration in quite another genus has has a caught
ngt
been just recorded. A ostalilitsotn in toll
hrgoes en Bergen) fi ash
was fixed by an iethyog off Eastern Scotland. The record is unique in some regards, and it is estimated that the fish (a grilse) swam at an average rate of 20 miles an hour. the migration of salmon, whose life history has been much clarified within the last few years, has now none of the mystery of the migration of the eel. It
' is not directed by so stern and blind an instinct. Fish in the sea go where food is plentiful, though temperature toll has its influence on movement from deep water to shallOw. 'Sea trout and salmon, as we now know, will travel at any rate four or five hundred miles in the shallow waters of the North Sea, Birds, it is said, only cross shallow seas. They dread the deep straits cf Madagascar and make the North Sea a favourite passage. Ferhaps the same is true of fish. There is much less change in the flora (or fauna) of a deep than a shallow sea, and therefore less temptation for the fish to move. Of course the migration of the salmon front salt to fresh water has quite another motive. It is chiefly the marine life of the salmon and sea trout that the new students have illuminated.
W. BEACII TilOMAS.
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