'I' In- Life of Yesterday 



\\iili early man. There is some popular con- 

 fusion as to whether or not the mammoth and 

 the mastodon are one 

 and the same, but 

 it may be said that 

 they represent two 

 distinct branches of 

 the elephant family. 

 They may be readi- 

 ly told apart by their teeth, those of the 

 mammoth being flat grinders with plates of 



Tooth of Mastodon. 



Tooth of Mammoth. 



enamel in the body of the tooth, while mas- 

 todon teeth have A-shaped cross-ridges and 



263 



