PLANKTON VOLUMES 

 JANUARY 1959 



CC. OF PLANKTON PER IOOO M' 

 OF WATER STRAINED 



0-33 

 34-100 

 101-300 

 301-900 

 | OVER 900 

 o STATIONS OCCUPIED 



Figure 4.--Plankton volumes, January 1959. 



