1000 THE JOHN DAY FAUNA. 



inferior part of the bone, the posterior near the lateral occipital crest. The 

 palatine foramen is rather large. It is much nearer the alveolar border 

 than to the median sutm-e, and is opposite the anterior border of the third 

 premolar tooth. 



Dentition. — The bases of two incisors, and both canines, are preserved 

 with the crowns of the molars of one side. The base of the external inci- 

 sor is not so much larger than that of the second, as in the cats already 

 described. It is separated from the canine by a diastema half as long as 

 that posterior to the canine. The latter is two-thirds as long as the long 

 diameter of the canine. The base of the canine is of a compressed oval 

 form, with a slight concavity on the inner side. It is much like that of the 

 Hoplophonem oreodontis, but is relatively larger. In fact, it is relatively 

 larger than in any other American saber-tooth, excepting the Pogonodon 

 platycopis. There are but three molars. The first or third premolar is quite 

 small, but has, as usual, two roots. The crown has a low compressed anterior 

 basal tubercle, and a small median cusp. The heel is rather long, equaling 

 the long diameter of the base of the cusp, and is compressed. The sectorial 

 is relatively large. It is somewhat worn by use, but its form is character- 

 istic. Its cutting heel is very long, while the base of the principal cusp is 

 small. There is a distinct anterior basal cutting lobe, as in the true Drepan- 

 odontes. The external face of the crown is concave before and behind the 

 median cusp. The tubercular or true molar has been lost; there are alveoli 

 for two roots, rather close together. The position of the external alveolus 

 shows that the crown extended externally to the plane of the jaw. 



Measurements. 



H. 



Length from iiremaxillary border to iuion 117 



Probable width of zygomata posteriorly 082 



Axial length from premaxillary border to orbit 040 



Axial length from premaxillary border to nares 057 



Axial length from i)remasillary border to postglenoid process 0i!5 



Width between superior canines , 020 



Width between sectorials behind 043 



Width of posterior nares 012 



Width of occiput above middle 037 



Width between orbits (horizontally) 047 



Length of sagittal crest 038 



Length of postglenoid from roof of meatus 018 



Length of posttympanic (total) Oil 



