Figure 13. — Plankton Voltimes 

 December 1956 



PLANKTON VOLUMES 

 DECEMBER 1956 



CC OF PLANKTON PER 1000 CM 

 OF WATER STRAINED 



0-33 

 34-100 

 "^ 101-300 

 Bf^ 301-900 

 ^M OVER 900 

 o STATIONS OCCUPIED 



i.8 



