TERTIARY ANIMALS. 



519 



ers of such teeth must have been fifty to seventy feet long. Some of 

 the more common forms of sharks' teeth of the American Tertiary, 



V 



Figs. 



Fig. 890. 

 -Tertiary Fishes— Teleosts : 889. Rhombus minimus, Lower Eocene. 890. Lebi 

 ceplialotes, Miocene. 



and Teleosts from American and European Tertiary, are given in the 

 preceding figures. 



Reptiles.— The age of Reptiles is past. The huge Enaliosaurs, Dino- 

 saurs, Mosasaurs, and Pterosaurs, are all extinct. Their class is now 

 represented by Crocodiles, Lizards, Turtles, Snakes, and Frogs, though 

 their place as rulers is supplied by Mammals and Birds. Five species 

 of Snakes, some of them eight feet long, and nine Crocodilians, have 

 been found in the Eocene of Wyoming, and several also in Europe. 

 In the Miocene of Europe at (Eningen, a Salamandroid Amphibian 

 was found and described in 1728 by Scheuchzer, a physician and natu- 

 ralist, professor in the University of Altorf. He gave it the title 

 " Homo Diluvii Testis," believing it to be the skeleton of a human being 



