348 Mr. R. I. Pocock on the 
The P. bengalensis-type. The ZH. pardinoides-type. 
Mesopterygoid fossa parallel- Mesopterygoid fossa narrow and 
sided, with transverse anterior | rounded in front. 
edge. 
Base of cranium short; bulla Base of cranium long; bulla 
more inflated in front; occiput | narrower in front; occiput more 
narrower above, with its lateral | widely rounded above, its lateral 
margins sloping inwards. margins more upright. 
Genus DenpRAiLurvs, Severtz. 
Dendrailurus, Severtzow, 1858, p. 885,; type colocolo, H. Smith 
(=strigilata, Wagn.). 
Lynchailurus, Severtzow, 1858, p. 885; type pajeros, Desm. 
Pajeros, Gray, 1867, p. 269; type pajeros (=pampanus, Gray). 
Distr. S. America : Guiana, Chili ; Uruguay to Patagonia. 
Two species, if distinct, namely colocolo and payeros. 
Skull with the same general features as Herpailurus, but 
with widely different bulle, which are not only more inflated 
and globular, extending posteriorly as far as the inferior edge 
of the foramen magnum and anteriorly almost as far as the 
ridge of the condyloid surface of the mandible, but differ 
in addition in the relatively enormous size of the outer or 
auditory chamber, which recalls that of 7. manul. The 
groove of the partition runs over the summit of the bulla 
from the stylomastoid to a point just in front of the basi- 
occipital suture. The partition itself is nearly vertical with 
a convex inner wall. The external or auditory chamber is 
as wide in front as the posterior chamber is behind and 
projects forwards far in advance of the very narrow anterior 
end of the posterior chamber. 
The following analytical key to the genera of Feline 
epitomises their main characters ; but, although an attempt 
has been made to juxtapose related forms, this method has 
been purposely abandoned in some cases in the interests of 
expediency in construction. For instance, Jctailurus and 
Dendrailurus have been widely separated from their allies, 
Ictailurus being, in my opinion, most nearly akin to 
Zibethailurus and Dendrailurus to Herpailurus, the only 
cranial similarity which brings Dendrailurus and Triche- 
lurus together in the table having been independently 
acquired :— . 
Very long upper canines and immense postcanine 
space; chin long and vertical; nasals broad 
throughout; their maxillo-premaxillary suture 
almost straight; postorbital processes very short ; 
occiput angular above.............. SORES mie ie Neofelis. 
Without that combination of characters....... ahs etl: 
