Cranial Characters, &c., of the Snow-Leopard. 313 
posterior chamber by the stylomastoid groove is distinct 
from the low partition and runs upwards, when the skull is 
inverted, from its posterior end. The same applies to two 
skulls of F. onca (fig. 3B) and to four of F. tigris. But in 
A. Right bulla of Panthera leo extracted and viewed from its upper, or 
attached, surface, part of the roof of the inner chamber cut 
away. e, carotid groove; ew, floor of eustachian tube; ea, ex- 
ternal auditory meatus with horseshoe-shaped tympanic bone ; 
oc, outer or auditory chamber separated by the partition from 
inner chamber (7c), the extent of which is indicated by the 
dotted line following the contour of the bulla. 
B. The same of Pantheru pardus (from India), but the roof left intact. 
OC. The same of Uncia uncia, 
three skulls of /’. leo the partition is somewhat higher and 
longer, and the auditory chamber consequently a little 
larger relatively (fig. 4A). 
