a 
178 FELID A. 
part which received the long descending crown of the 
upper canine when the mouth was closed. 
The Felis megantereon of M. Bravard is much _ too 
small, of course, for the great falciform canines of the 
Machairodus cultridens, some of which measure nine inches 
in length, following the outer curve. I have had the satis- 
faction of obtaining the same kind of evidence of the 
feline affinities of the Machairodus from an inspection of 
the fossil remains discovered by Messrs. Falconer and 
Cautley in the tertiary deposits of the Sewalik mountain 
range, and transmitted by Captain Cautley to the British 
Museum. A portion of the left side of the upper jaw of a 
young Machairodus, with apparently the first or deciduous 
dentition, exhibits the characteristic elongated, compressed, 
and finely serrated canine in situ: the extremity of the 
crown is broken off, but the tooth evidently bore the same 
proportion to the molar series as does the canine of 
the Felis megantercon of Bravard. 
The molar series in the Sewalik Machairodus included, 
in an extent of one inch and a half, three teeth: the first, 
which is simple, single-fanged, and very small, is indicated 
by the socket: the second, measuring eight lines in the an- 
tero-posterior diameter, is the carnassial or sectorial tooth ; 
its crown is more compressed, its trenchant margins sharper, 
and the inner tubercle less developed than in the normal 
species of Felis: the socket of the third or tubercular 
molar is behind, or in a line with the sectorial tooth, as 
in the milk-teeth of the Lion. What remains of the 
crown of the canine indicates its great length: the breadth 
of its base is five lines; it is much compressed ; the inner 
surface is flat, and both edges are finely but distinctly 
serrated. Like the larger canines of Machairodus, the 
outer convex side of the tooth is devoid of the two linear 
