PLANKTON OF THE GULF OF MAINE 
7 
from the characteristic boreal plankton of the banks water to the tropical oceanic 
plankton of the much warmer and more saline waters of the so-called “inner edge 
of the Gulf Stream.” The reader will note that, as defined here, the Gulf of Maine 
Fig. 2. — Locations of Grampus stations 10057 to 10060 and 10087 to 10106, July 8 to August 22, 1913, and general location 
of stations 10047 to 10056 and 10053 to 10056, November 20, 1912, to April 14, 1913 (X) 
includes the whole of the offshore rim formed by Georges and Browns Banks and 
the two main deep channels — Eastern and Northern — that pierce it. 
Brief notes on the plankton collected on the several cruises have already been 
published (Bigelow, 1914, 1914a, 1915, 1917, and 1922). 
