tape BLANCO 



PLANKTON VOLUMES 

 FEBRUARY 1959 



SAN FRANCISCO 



CC.OF PLANKTON PER IOOO M J 

 OF WATER STRAINED 



0-33 

 34-100 

 101-300 

 301-900 

 I OVER 900 

 o STATIONS OCCUPIED 



(sam cacao— 



Figure 5.--Plankton volumes. February 1959. 



16 



