CENOZOIC TIME — TEETIARY. 



899 



1500 



1500-1502. 



1501 



1502 



Miocene. - Chipola group. --^ig. 1500, Orthaulax Gabbi ; 1501, TurriteUa subgrundifera (x §) ; 1502, Strombus 



Aldrichi. From Dall. 



1503-1505. 



1508 



1504 



Miocene. — Yorktown group. — Fig. 1508, Pecten Jeflfersonius (x i); 1504, Ecphora quadricostata (x §); 1505, 



Striarca centenaria. T. Say, 1824. 



