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BULLETIN OF THE BUREAU OF FISHERIES 
southeast slope of Georges Bank (station 10220), where longipes slightly outnumbers it 
in March and April (p. 407), and local phenomena of the same sort noted on the 
western part of the bank and in the southwest corner of the basin of the gulf in July, 
1913 and 1914 (station 10058, July 8, 1913; station 10215, July 20, 1914), fore- 
Fig. 110. — Approximate dates when Ceratium tripos may be expected to become dominant over C. longipes in different 
parts of the Gulf of Maine 
shadow a second alteration in the mutual relationship of the two species during the 
latter part of the summer, which once more makes C. tripos the dominant member 
of the pair. 
A detailed account of the augmentation of C. tripos in the gulf with the advance 
of the summer can not be given as yet, but the approximate dates when it may be 
