CAXID^. 



939 



cannot be inferred. It was as large as the coyote in all probability, and its 

 facial physiognomy must have been that of a large mink or otter. Its 

 canine teeth are formidable from their size, and the high sagittal crest and 

 wide zygomata indicate great power in the action of the lowerjaw. If 

 anything may be derived from similarity of cranial form to the otter, its 

 habits were aquatic. Its large otic bullae indicate a well developed and 

 sensitive sense of hearing. In the development of these parts it is only 

 exceeded among the Canidce here described ])y the Galecynus lemur. 



OLIGOBUNIS Cope. 



American Natura'ist, 1881, June (May 19), p. 497; 1883, p. 246. 



The dental formula is, I- ., ; C. - ; Pm. - ; M. -. The single superior 



tubercular molar is similar in general to that of other Canidce. The inferior 

 sectorial has an internal cusp and posterior heel, the latter with a basin and 

 low cutting edge on one side. Inferior tubercular well developed. 



The only known species of this genus I formerly referred to Iciicyon 

 of Lund, which it nearly approaches. It seems, however, that in that genus 

 there are two tubercular superior molars, and the heel of the inferior secto- 

 rial is trenchant as in Temnocyon. 



Fig. 34. — Olifjobunis crassiridtus Cope, one-half natural size, a, right maxillary lioue witli teeth 

 from below ; b, right mandibular ramus from above. From the John Day river of Oregon. 



