400 



HISTORICAL GEOLOGY. 



FIG. 353. Mastodon Americanus. (After Owen.) 



In Fig. 352 we give 

 one of the most 

 perfect of these. 

 Any one can dis- 

 tinguish the re- 

 mains of the mas- 

 todon from those 

 of the mammoth, 

 if the jaw-teeth 

 be preserved. 

 The difference is 

 shown in Figs. 353, 

 354. It is doubtful 

 FIG. 354. Molar tooth which of these two 



of a Mammoth (Ele- n 



FIG. 353.-Tooth of Mas- phas primigcnius), animals Was the 

 todon Americanus. grinding surface. greater; but either 



