NIMEAVID^. 967 



half of the crown, excepting near the base, the anterior face is thrown into 

 a shallow groove. The ridge is not denticulate, while the acute posterior 

 edge of the tooth is distinctly so from the base to the apex. The (first) 

 second superior premolar is very small, and is two-rooted; it is a little nearer 

 the base of the third premolar than that of the canine, leaving two diaste- 

 mata. The third premolar is of large size, and consists of a triangular cusp 

 and a short lobe-shaped acute heel. The superior sectorial is rather large. 

 The apex of its anterior cusp is directed well backwards, and its posterior 

 border is acute. The heel is long, and its cutting edge rises to half the 

 height of the cusp. The external extremity of the crown of the tubercular 

 molar is narrower than the internal; it just reaches the vertical plane of the 

 alveolar border of the maxillary bone. Its size is moderate. 



The inferior incisors are smaller than the superior, and of similar form. 

 The external is only a little larger than the othei's. The inferior canine is 

 much larger, and is nearly half the length of the superior canine. Its crown 

 is directed somewhat outwards, and its inner face is moderately beveled 

 above the apex of the external incisor. A section of the crown is an oval 

 whose long axis is anteroposterior at the base, and more inwards posteriorly 

 to an angle higher up. This angle is the posterior cutting ridge, which 

 extends from the inner side of the base to near the apex, and is strongly 

 denticulate. The diastema following the inferior canine is remarkably long 

 in this species, relatively longer than in any of the large existing cats. The 

 third inferior pi'emolar (first present) is also remarkable for its large size, 

 differing in tliis respect from true cats and saber-tooths alike. Its cusp is 

 elevated, and the posterior basal heel is very short. There is no anterior 

 basal tubercle. The fourth premolar has a greater longitudinal extent, and 

 its apex is not quite so elevated as that of the third. Its anterior and pos- 

 terior basal lobes are trenchant, and of equal anteroposterior extent. The 

 inferior sectorial is large, and its principal lobes are large, and with acute 

 cutting edges. Tlie anterior lobe is longer than high, and the posterior 

 higher than long, and its posterior edge is acute. The heel is small and 

 acute. There is no trace of internal tubercle. The tubercular molar is 

 small, and its diameters are subequal, and similar to that of the heel of the 

 sectorial. In one of the three mandibles in my collection, represented on 

 Plate LXXIV, fig. 1, this tooth is wanting. 



