OF THE SIVAliic HILLS. 141 



The mamillaries chiefly differ from those of the Tiger, in their greater 

 prominence along the alveoli of the canines, and the moi« decided hollow 

 which occupies the infra- orbitary region. From the elevated (ivrection of 

 the zygomatic arches, the posterior margin of the maxillaries, descei4ing 

 from the malars is higher than in the Tiger. The infra-orbitary foramina 

 agree in form and position with those of the Tiger. 



The ascending apophysis of the incisive bones, runs higher up between 

 the nasals and maxillaries, giving thus a stronger insertion to the bone. 



We do not observe any very appreciable difference in the palate, 

 except that the bulge of the canines, and the inward direction of the large 

 false molars, appear to contrast it in width between this teeth. 



The orbit is smaller than in the Tiger ; the post-orbitary processes of the 

 malars and frontal are more apart, and the osseous ring consequently less 

 complete. 



Regarding the relations of the fossil with respect to other species. — ■ 



The fossil Lion of Gaylenreath, F. spelcea, differs from it, in the great 

 size, equalling that of the Lion in the outline of the head ; breadth of fore- 

 head ; depth of zygomatic arches ; position of the infra-orbitary foramina, 

 and inconsiderable sagittal crest. 



The fossil F. Antiqua, differs in being greatly smaller. The existing 

 Lion is much larger, differing also in its rectilinear profile, shortness of 

 head, and want of prominence in the sagittal crest and occipital. 



The points of distinction and resemblance with the Tiger have been 

 noticed in detail. 



The Panther somewhat resembles the fossil in the moderate convexity 

 of the head, but differs in size and in the little prominence of the sagittal 

 crest. The Jaguar has the same elevated direction of the zygomatic arch, 

 as the fossil, but differs greatly in the outline and form of the head. 



The Couguar has one character peculiar to it and the fossil in the 

 genus ; in the face being shorter than the cranium. But it differs in size 

 aiKl form. 



