TABLE OF THE DISTRIBUTION IN TIME OF CEETAIN CLASSES op ^^ INTEETEBEATA . 



EOCENE. 



UPPER 



MESOZOIC. 



MIDDLE AND 



LOWER 



MESOZOIC. 



PERMIAN AND 

 CARBONIFE- 

 ROUS. 



DEVONIAN. 



SILURIAN AND 

 CAMBRIAN. 





Q 



a 

 o 



T 



^L 



i. 



-ar 

 u 



I- 



< 



.1 



Vv 



/ 



< 



a 

 o 



Q. 



^ 





 —& 



♦ \ 



** 



O 









i 

 O 



-i 

 < 



X 

 a. 



u 



