PLANKTON VOLUMES 

 OCTOBER I960 



CC. OF PLANKTON PER 1,000 M, 

 OF WATER STRAINED 



1-33 



34-100 

 I 101-300 

 I 301-900 



STATIONS OCCUPIED 



125- 



Figure 13. — Plankton volumes, October 1960. 



45 



