956 ' THE JOHN DAY FAUNA. 



optic foramen' and issues in the posterior side of the / sphenoorhitale, and 

 not separately as in the species Uncia at my disposal, the Cyncchiriis jubatus, 

 and in several species of Fells. An alisphenoid foramen. The / ovale is 

 ransverse in direction and is well separated from the / lacerum anterius. 

 The latter is contracted. The / postglenoiduni is nearly as large as the / 

 ovale, and is near the anterior border of the meatus of the ear. The latter 

 is small, and is bounded below by a distinct ossification, probably a tym- 

 panic bone, which is thickened so as to resemble somewhat a sesamoid. 1 

 find it in the two specimens Avhere the region is preserved. There is no 

 foramen lacerum med'ms, and the / carotideum is well defined from the / /. 

 posterius, which it about equals in size. The / condi/loideum is quite distinct 

 from the latter, of about the same size, and does not enter it from behind 

 so as to have a common opening, as in the species of Felis, Uncia, Cyncelurtts 

 Crocuta and Hycena. Supraglenoid, postquamosal, subsquamosal, and mas- 

 toid foramina wanting. The postparietal is rather small, and is situated 

 in the anterior inferior part of the posterior third of the parietal bone. 

 There ai-e two lateral and two anterior mental foramina on each side. Of 

 the former, the posterior is below the posterior part of the second premolar, 

 and the anterior below the first premolar. 



Dentition. — There cannot be said to be any diastema in the superior 

 dental series excepting that between the canine and the first incisor. The 

 inferior diastema occupies the usual position, but has diminished length. The 

 first and second superior incisors are quite small ; their crowns are about 

 as wide as their roots, and, meeting the inferior incisors squarely, are trun- 

 cated by wear. The external superior incisor is several times as large as 

 the others, and its crown is expanded outwards at the base. It presents an 

 external worn face several times as long as its apical face. The superior 

 canine is relatively about as long as in the panther. It is a good deal more 

 compressed than in that species, and has a sharp posterior cutting edge 

 which extends from near the alveolus to near the apex. This edge is not 

 crenated. There is no corresponding anterior edge, though the wearing of 

 the inner side of the crown by the inferior canine produces an artificial one 

 near the apex. The front of the canine is rounded, but is not as wide as in 

 existing cats. 



