I^'^lk 



Publications of the Carnegie Muteum, Serial No. 102. 



MEMOIRS 



OF THE 



OAENEG-IE MUSEUM. 



VOL. VII. NO. 6. 



W. J. HOLLAND, Editor. 



THE AMERICAN DICERATHERES 



By 0. A. Peterson 



PITTSBUKGH. 



PrBLISHED BY THE AUTHORITY OF THE BoARD OF TRUSTEES OF THE 



CARNEGIE INSTITUTE. 

 July, 1920. 



