A Horned Rodent from the Colorado Mio- 

 cene. With a Revision of the Myla- 

 gauli, Beavers, and Hares of the 

 A 7nerican Tertiary. 



By W. D. Matthew. 



AUTHOR'S EDITION, extracted from BULLETIN 



OF THE 



Vol. XVI, Article XXII, pp. 291-310. 

 New York, Sept. 2^, igo2. 



