30 



ANAEROBIC HABITATS 



a 

 Q 



0-0 1,0 2.0 3 4.0 5 6. a 



Oxygen content in cc. per liter 



Fig. 3. A. Vertical oxygen distribution in the Gulf of California 

 (20° 00' N., 108 o 16' W.). (Drawn from Sverdrup. Johnson and 

 Fleming's data, 1942.) B. Vertical oxygen distribution in the western 

 basin of the North Atlantic (35° 07' N., 66 o 25' W.) (From Seiwell, 

 1937.) 



