m^^ 



Figure 56. --Surface tows gathered at station 3 near Buffalo, New York, 1929. A. Community of diatoms obtained 

 in June. B. Asteriwiella , Fragtlaria , Melosira , mixed with Ceratium , Dinobryon , Staurastrum , etc. , 

 in July. C. Anabaena, Ceratium and a few diatoms in August. D. Diatonis, green and blue -green 

 algae in September. 



144 



