from the Eastern Miohvppus Beds. 



177 



There are the usual forty-four teeth. The upper incisors 

 diverge, and have short, compressed crowns. The upper 

 canine is very large and dependent. It is oval in outline near 

 its base, but compressed below, with a serrated posterior 

 edge ; a feature not before observed in ungulate mammals. 



Figure 3. — Left upper canine of Elomeryx armatus. Marsh ; outer view. 

 Figure 4. — Last upper molar of same species; right side; seen from below. 

 Both fig-ures are natural size. 



There is a long diastema behind the canine. The premolars 

 and molars form a close series. An upper canine and last 

 molar of the type species are shown above, natural size, in 

 figures 3 and i, and the upper molars of a new smaller species, 

 in figure 5 below. 



5. 



Figure 5. — Upper molars of Elomeryx mitis, Marsh ; leftside; seen from below. 



Natural size. 



The posterior nares are placed well behind the molar series, 

 much as in existing swine. There is a postglenoid process, and 

 a long paroccipital. The type species has a small auditorial 

 bulla, and the other, a larger one. The zygomatic arch is slender, 

 and curved well outward. The temporal fossae are large, and 

 separated above by a narrow sagittal crest. The brain was well 

 developed. The type specimen of E. armatus indicates an 

 animal about the size of a large deer. 



