TERTIARY ANIMALS. 



513 



This limestone occurs in the Alps 10,000 feet, in the Pyrenees 

 11,000 feet, and in the Himalaj-as 15,000 and even 19,000 feet above 



Fig. 874. Fig. 875. Fig. 876. 



Figs. 870-876.— Califobxia Miocene Shells (after Gabb): 870. Ostrea Titan, x i 871. Pecten 

 Cerrocensis, x J. 872. Venus pertenuis. 873. Cardium Meekianum. 874. Cancellaria yetusta. 

 875. Ficus pyriformis. 876. Echinorachnis Brcwerianus. 



the sea-level. YTe see, then, the immense changes which have occurred 

 by mountain-making since the Eocene. 



83 



