350 



THE DEEP SEA 



of the subarctic Pacific is known to have high plankton produc- 

 tivity but it is perhaps surprising that this is indicated also for 

 the calcareous Foraminifera. His data, however, indicate that the 

 number of species is small here. 



(«) 



CHJBASCO 40 . 



,1 |«i.n 



f:r)4367S^ 10 123*50769 aO 123* 



(b) 



Fig. 1. (a) An electron microscope photograph of coccoliths and fragments of 

 them from calcareous ooze of Quaternary age (X 3,000). (6) Core Ch. 40 of Miocene 

 age, except upper 10 cm (at left) ,of Quaternary age. Core Ch. 17 is an OUgocene 

 calcareous ooze. Different scales indicated. 



