2 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 6l 



about 6 years old. Inasmuch as the upper canines are well developed, 

 it was quite certainly a male. 



After having made a careful study of the skull, taken many meas- 

 urements and made careful comparisons with the accessible mate- 

 rials, the writer concludes that the animal probably belonged to the 



Fig. I. — Map showing localities in Alaska where remains of fossil horses have 



been found. 



species which he described recently (Proc. U. S. Nat. Mus., Vol. 44, 

 PP- 569-593, pis. 69-73, and text figures) under the name Equns 

 niobrarensis. Nevertheless, there appear to be certain differences 

 which, although apparently not of specific value, make it proper to 

 signalize this horse as a distinct form. It may be named and char- 

 acterized as follows : 



