156 Annals of the Carnegie Museum. 



Mi this element of the tooth is decidedly convex and nearly on an 

 antero-posterior line with the anterior outer cone. Pi had but one 

 cross-crest. The tooth stands obliquely, the inner portion being 

 farther forward. 



Measurements. 



Mm. 



Height of the lower border of orbit above alveolar border at M-.. l8 



Length of Pi 7.5 



Width " " 10.5 



Length of Mi 8.5 



Width " " 10.5 



Length of M 2- 10 



Length of M^ ii 



Width 12 



Height of crown of M^ 2-3 



From Sage Creek about seven miles northeast of Lima. 



Hyrachyus ? Priscus sp. nov. 



No. 784. Fig. 2. 



The type includes the greater part of the mandible with all the 

 post-canines except Py, the anterior part of the skull with incisors 

 and premolars, and the atlas. It was found a few feet below the 

 specimen of Heptodon ? just described. 



The premaxillaries are rather slender and entirely separated. The 

 diastema between the canine and the first premolar moderately long ; 

 pi small ; premolars increasing rapidly in size posteriorly ; P^ begin- 

 ning to assume the molar pattern — that is, the inner lobe is beginning 

 to divide, though no such tendency appears in P^ and Pi ; mandible 

 heavy and thick ; symphyseal part proportionately slender ; masseteric 

 fossa high ; angle broad ; lower border convex antero -posteriorly. 



The premaxillaries resemble those of the modern tapir {Elas- 

 fnognathtes) in form, but they are not coossified anteriorly and are not 

 nearly so robust. Near the anterior inner part of the right premax- 

 illary there was a small, peg-like process projecting backward and 

 toward the other premaxillary, but no sign of a union of the two pre- 

 maxillaries. The diastema between the canine and Pi was propor- 

 tionally as long as in Elastnognathus. The infraorbital foramen opens 

 above P^. 



The specimen was in a breccia formed by the breaking up and 

 recementing of the sandstone so parts of the broken skull . were 

 separated. Fragments of the upper part of the skull, including por- 



