PLATE XI 



igi*g^^ 







.-Vv./ , 



ii 



Fig. 1. Sample 60, diatom ooze, northeast Pacific, depth 5198 meters; 

 0.25- to 0.12-mm size grade; almost entirely diatom frustules 

 (Coscinoidiscus) 



Fig. 2. Sample 59, diatom ooze, northeast Pacific, depth 5296 meters; 

 0.25- to 0.12-mm size grade; frustules of diatoms and skeletons of 

 radiolaria 



178 



