366 



BULLETIN OP 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 



*4 

 May 



71' 



Fig. 101. — Occurrence of the ctenophore Plcurobrachia 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 Gull 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- 



