MACHAIRODUS. 179 



impressions which characterize the canine in the typi- 

 cal Felines ; but, in the somewhat aberrant Fells jubata, 

 these impressions are also obsolete. 



A portion of the lower jaw of a larger Machairodus, 

 from the Sewalik range, shews the beginning of the cha- 

 racteristic downward extension of the symphysis, and the de- 

 pression on the outside of the ramus for the lodgment of the 

 long upper canine. The molar series, which consists, as 

 in the typical Felines, of three premolars, the last being 

 the sectorial tooth, has a longitudinal extent of two inches ; 

 the second molar slightly overlaps the third, which has 

 an antero-posterior extent of eleven lines. This portion 

 of jaw indicates a species of Machairodus as large as the 

 Jaguar : it most probably belongs to an adult of the same 

 species as the one indicated by the instructive portion of 

 the upper jaw. 



MACHAIRODUS LATIDENS. 



In this island, anterior to the deposition of the drift, 

 there was associated with the great extinct Tiger, Bear, 

 and Hysena of the caves, in the destructive task of con- 

 trolling the numbers of the richly developed order of the 

 herbivorous Mammalia, a feline animal as large as the 

 Tiger, and, to judge by its instruments of destruction, of 

 greater ferocity. 



In this extinct animal, as in the Machairodus cultrldens 

 of the Val d 1 Arno, and the Mack, megantereon of Auvergne, 

 the canines curved backwards, in form like a pruning-knife, 

 having the greater part of the compressed crown provided 

 with a double-cutting edge of serrated enamel ; that on 

 the concave margin being continued to the base ; the 



N 2 



