PLANKTON VOLUMES 

 JUNE 1959 



CC OF PLANKTON PER IOOO M. 

 OF WATER STRAINED 



0-33 



34-100 

 101-300 

 301-900 

 OVER 900 

 o STATIONS OCCUPIED 



Figure 9,--Plankton volumes, June 1959. 



42 



