226 



Cincinnati Society of Natural History. 



its duplicate in any museum or collection in the world. Even 

 though another be found similarly supplied, the Cincinnati 

 Society of Natural History will have the honor of first find- 

 ing and describing this unique mastodon jaw. 



The writer desires to express his thanks to Prof. E. D. 

 Cope and Dr. Edward Orton for their suggestions and identi- 

 fications, which were of material assistance in the compila- 

 tion of this paper. 



i 



