PLANKTON VOLUMES 

 MAY I960 



CC OF PLANKTON PER IPOO M: 

 OF WATER STRAINED 



1-33 



34-100 



101-300 

 ^1 301-900 

 ^J OVER 900 

 o STATIONS OCCUPIED 



Figure 8. — Plankton volumes. May 1960. 



28 



