BiGELow. — Explorations in the Gulf of Maine. 



PLATE 8. 



Distribution of microplankton, July and August, 1912. 



Abundant Ceratium plankton, ^p 



Intermediate Ceratium plankton. 



Scanty Ceratium plankton. V/y^ 



Mixed plankton. j||||| 



Scanty mixed plankton. : 1 1 1 1 



Abundant diatom plankton. ^ 

 Intermediate diatom plankton. 

 Scanty diatom plankton. ^ \ 



