PLANKTON OF THE GULF OF MAINE 



229 



proving it to be of general occurrence in the oceanic water outside the continental 

 edge abreast of the gulf in winter as well as in summer. It was in sufficient numbers 

 at the three spring stations (approximately 500, 1,000, and 3,800 per square meter) 

 to show that it may locally attain a fair degree of abundance at that season. Willey 

 (1919) also reports it in small numbers from one station outside the continental 

 edge off Cape Sable on July 22, 1915. 



Fig. 71 .—Occurrence of the copepods Eucheirella rostrata, Eucalanus attenuatus, and E. elongatus. O. locality records for 

 Eucheirella rostrata: X» locality records for Eucalanus attenuatus (®, approximate location of Wheeler's record); #, 

 locality record for E. elongatus. The arrows mark the chief route of immigration into and around the Gulf; the hatched 

 curve, the inshore boundary to the area of regular occurrence for all three of these copepods. 



