1902. 



Osbor/i, Oligocene Titaiiotheres. 



105 



the same general type, but with rudimentary horns, in the 

 Lower Beds, to which the name B. leidyi mav be given. A 



Fig. Q. BrontotherUim leidyi. (U. S. Nat. Mus. No. 4249, Sk. R.) Type. X 9. The 

 side view of this skull was figured by Marsh (Amer. Jour. Sci., Oct., 1887) a.s Meno/>s varians 



successor of this species from the Middle Beds proves to be 

 identical with Cope's Syinborodon hypoceras. 



LOWER BEDS. 



Brontotherium leidyi, sp. nov. 



Type, Skull No. 4249, U. S. Nat. Mus. Nasals elongate, narrow- 

 ing anteriorly. Horns very short, slightly recurved, of transverse ov^al 

 section. Canines stout and blunt. Premolars non-cingulate, with 

 rounded contours and well-developed tetartocones. Incisors Jii 



This rare skull was discovered by Hatcher and is posi- 

 tively recorded from the Lower Beds, Middle Level. It is 



