480 E. L. Troxell — Fossil Ruminant from Texas. 



about a mile from the famous quarry where ten skeletons of 

 Equus scotti have been unearthed. 



The horns of the new species arise from the frontal bones at 



Fig. 2. 



Fig. 2. Anterior view of skull of Preptoceras mayfleldi, sp. nov. Holo- 

 type, Cat. No. 10920, Yale Museum ( x -25). 



an angle of about 90° to each other. The cores are slightly 

 flattened antero-posteriorly and at the bases have burrs. 



Fig. 3. 



Fig. 3. Posterior view of skull of the type specimen of Preptoceras 

 sinclairi, after Furlong ( x "2). 



The frontal bones form the crown and join the parietal well 

 back on the head ; the suture lies in general about one centi- 



