CARNIVORA. 



383 



the Lower Miocene (White River Formation) of Dakota. Pachycena is a 

 more imperfectly known allied genus from the Lower Eocene (Wasatch 

 Formation) of Wyoming. 



FIG. 214. 



Stypohphus whitice; skull and mandible, left lateral aspect (a), palatal aspect of 

 skull (b), anterior portion of right mandibular ramus, inner aspect (c), and 

 left tarsus, anterior aspect (d), two-thirds nat. size. L. Eocene (Wasatch 

 Formation) ; Wyoming. (After Cope.) 



Stypolophud (fig. 214). A genus comprising small slender animals 

 with a long narrow cranium and complete dentition (44 teeth), all the 

 teeth sharply pointed or with acute cusps. The upper m. 1, m. 2, and 

 upper pm. 4 are tritubercular (fig. 214 b), while m. 3 has lost its postero- 

 outer cusp. Each of the lower true molars develops a high blade iu front, 



