Figure 1. — Average Plankton Volvunes 



1956 



AVERAGE PLANKTON VOLUMES 

 956 



CC OF PLANKTON PER 1000 CM 

 OF WATER STRAINED 



0-33 



34-100 

 ^R 101-300 

 ^1 301-900 

 ^H OVER 900 



o STATIONS OCCUPIED 



