Figure 6, 



-Plankton Volviines 

 May 1956 



PLANKTON VOLUMES 

 MAY 1956 



CC OF PLANKTON PER 1000 CM 

 OF WATER STRAINED 



0-33 



34-100 



101-300 



301-900 



OVER 900 



STATIONS OCCUPIED 



22 



