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BULLETIN OF THE BUREAU OF FISHERIES 
in February. It extends its range offshore in the gulf during the following months 
until in midsummer and early autumn it is to be expected anywhere north of a 
line Cape Cod-Cape Sable, both near land and over the deep basin, and with no 
Fig. 101. — Occurrence of the ctenophore Pleurobrachia pileus in the Gulf of Maine. X, locality records, March, April, and 
May; @, June through September. The hatched curve marks the approximate offshore boundary for this ctenophore 
in the Gulf in early spring; the stippled curve in summer 
decided preponderance of the locality records in one side of the gulf or the other. 
We have found no Pleurobrachia in the southern deeps of the gulf, in the eastern 
channel, or over the eastern half of Georges Bank at any season, and the May sta- 
