PLANKTON OF THE GULF OF MAINE 
461 
These scattered records point to late summer and early autumn as its season 
of greatest abundance in the Gulf of Maine, and they suggest, though hardly prove, 
that its chief center of distribution lies in the western part of the gulf with a second- 
Fig. 132. — Locality records for Acanthometron, 1914 to 1920. O. August, many; A AugustAfew; ®, September, many; 
H> September, few; X, October, few; A, April, occasional 
ary center somewhere off southern Nova Scotia, for which its presence off Shel- 
burne on September 6, 1915, is evidence. Furthermore, the areas of abundance 
for Acanthometron have been small in extent, with neighboring stations yielding 
