329—152 INDIAN TERTIARY AND POST-TERTIARY VERTEBRATA. 
long. In the size of the cheek-teeth this specimen agrees with the jaw of a medium- 
sized leopard ; in some specimens of which the crown of pm. 8 is low, while in others 
m. 1 is longer than pm. 4, as is the case in the fossil. The fossil jaw is, however, 
somewhat deeper than in the leopard. 
Since the jaws of the different species of Felidce resemble one another so closely, 
it is almost impossible, except in a few particular instances, to draw from them any 
characters of specific value ; and it is accordingly considered inadvisable to assign 
any specific name to the present specimen ; but to consider it merely as indicating a 
third Siwalik cat, probably allied to the leopard. 
Second specimen . — There is in the British Museum a second specimen of the left 
ramus of a very similar mandible (No. 48,929), containing the two last cheek-teeth. 
It is of slightly larger size than the last specimen, but may not improbably be referred 
to the same species. 
Lower canine . — In figure 3 of plate XLIII. there is represented from the outer 
side the canine tooth of a carnivore, collected by Mr. Theobald in the Siwaliks of the 
Punjab, which from agreeing with the corresponding tooth of existing cats, may 
without much doubt be referred to the type genus. From its highly curved shape, 
and the approximation of the two vertical ridges occupying its inner surface, it 
evidently belongs to the lower jaw 1 ; and to the right side. It does not, however, 
show the vertical grooves which generally occur on the outer side of this tooth in the 
cats. The summit of the crown has been abraded. In the following table the 
dimensions of this tooth are compared with those of the canine of the small tiger’s 
skull referred to in the description of the preceding species : — 
Fossil. F. tigris. 
Antero-posterior diameter of base of crown .... 069 0-9 
Transverse ,, ,,,,,,,, • • • • 0-54 0 - 58 
Height of crown (restored in fossil) 1'3 1-45 
As the upper canine of F. cristata is larger than that of the same skull of F. 
tigris, the present tooth cannot belong to the former. The lower canine of F. 
bracliygnatlms is considerably smaller than the present specimen. Since the type 
mandible of the present species is somewhat deeper than that of the leopard, and as 
the second specimen is rather larger, it is not impossible that the canines of that 
species may have been somewhat stouter than in the leopard, in which case the 
specimen under consideration may possibly be referred to the former : if, however, 
this reference be incorrect it must be referred to a new species. The tooth is about 
equal in size to the canine of the jaguar. 
Distribution . — If all the specimens described above be correctly associated, the 
range of the present species extended from the typical Siwalik Hills to the Punjab. 
Species 4 : Felis (non. del allied to F. lynx). 
Mandible . — In figures 7, 7a of plate XLIII. there is represented the anterior 
part of the left ramus of a small Felis , collected by Mr. Theobald in the Siwaliks of 
l Tn the figure the specimen is represented as belonging to the upper jaw. 
