ON THE PROBOSCIDEAN FOSSILS OF THE PLEISTOCENE DEPOSITS. 



55 



AGE 



■s-s 



^1 



US. 



Specimens of unknown age. 



9 



2 



7 



13 









Elephant 





Masted on 



2 

 1 



1 



4 



1 



2 

 2 





Specimens of the pre-Kansan (?) or Kansan (?) age. 

 Mastodon '. 





Specimens from the ferretto zone, post^Kansan and pre-loessian. 





Specimens from the surface of the Illinoian drift, post^IUinoian 

 and pre-loessian. 



Undetermined 



1 



Specimens from the base of the loess, post-Kansan and pre- 

 lowan. 



Elephant 



Mammoth 





Mastodon 



1 



Undetermined 



1 



1 

 2 

 1 



1 



Specimens from the loess. 

 Elephas americanus 





Mammoth 









From the area of the lowan drift, post-Iowan. 





Mastodon 



1 



1 



From the area of the Wisconsin drift, post- Wisconsin. 





Elephant 



1 

 2 



■i 

 ] 



1 

 2 



10 

 4 



Mammoth 



1 

 2 





Undetermined 



From alluvium, mostlj- sub-recent, but some, perhaps, older. 

 Elephas primigenius 





Mammoth 









Undet<?rmined 









