60" 



80° 



40' 



20' 



20' 



40' 



LEGEND 



PRODUCTIVITY MEASUREMENTS AND PHY— 

 TOPLANKTON PIGMENT CONCENTRATION IN 

 THE ATLANTIC OCEAN BY AREA. 



40' 



K4 



479 



478 



477 



The figure between parentheses indicates the 

 nunnber of observations taken within the area 

 of each Morsden statistical rectangle, 



80' 



60' 



40' 



20' 



20' 



U« 



