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BULLETIN OF THE BUREAU OF FISHERIES 
It is to be noted that this has been observed in the shoal water of the banks as 
well as in deep water. A. clausi has seldom been found plentiful enough in the Gulf 
of Maine to suggest that it is ever important there as a food supply for larger ani- 
Fig. 59.— Percentages of the copepod Acartia clausi in the total catches of copepods of all kinds in the vertical hauls from 
June to October, 1915. The hatched curve incloses the area where it usually constitutes more than 10 per cent of the 
copepods in summer 
mals. This is likewise true of it, as a rule, in north European seas, though it has 
been recorded there among the stomach contents of various fishes; but as Farran 
(1903, 1910, and 1911) reports it as taken throughout the year on the mackerel- 
