EXTINCT ANIMALS 



the strata (as shown in Fig. 36, p. 52), and 

 the cutting or cUff made by the comparatively 

 modern river exposes them to our view and to 

 easy excavation. The nodules are relatively 

 to the age of the river-valley or cutting 

 (which is probably some 150,000 thousand 



I -1. / -f t-| 



Fig. 158. — Photograph of a skeleton of Pariasaurus, removed 

 from an enveloping nodule and mounted by Professor 

 AmaHtzky. 



years old), as much older than it is as are 

 Roman coins older than the trench dug three 

 hours ago which brings them to light. If 

 you look at the position of the Trias and Per- 

 mian in the table of strata you will get some 

 idea of how immensely remote is the time when 

 these great reptiles lived where now is Arch- 



2l8 



