PLANKTON OF THE GULP OF MAINE 



279 



in the deeper parts of the gulf, together with the fact that the average depth of the 

 36 hauls yielding more than the average number of specimens per square meter for 

 the respective month and year has been 164-0 meters, but only 113-0 meters for the 



,-"•-■? 



Fig. 84.— Localities where the vertical hauls have yielded more Pscudocalanus elongatus per square meter ot sea area than 

 the average for the respective month. X. June to October; •, February to May 



80-odd hauls yielding less than the average number of specimens, does not suggest 

 any impoverishment of Pseudocalanus in the deep strata of the gulf, such as is demon- 

 strated for Calanus finmarchicus (pp. 203, 205). On the other hand, there is nothing 



