NUMBER OF SPECIES 



20 30 



i г 



m 



1U000- 

 WiOO 



ttm 



Fig. 352a. Vertical distribution of species Forcipulata, 

 found at a depth of more than 2,000 m (Vinogradova). 

 1 Total number of species ; 2 Number of species appear- 

 ing at a given depth ; 3 Number of species disappearing 

 at a given depth. 



NUMBER OF SPECIES 



10 Ю 



10 



Fig. 352b. Vertical distribution of species Phanero- 

 zonia found at a depth of more than 2,000 m (Vino- 

 gradova). / Total number of species; 2 Number of 

 species appearing at a given depth ; 3 Number of species 

 disappearing at a given depth. 



