312 Mr. R. I. Pocock on the Tooth-change, 
is cut open the posterior chamber is seen to be much larger 
than the anterior or auditory chamber, and its auditery 
portion extends forwards along the inner part of the bulla 
approximately as far as, or farther than, the anterior part of 
the auditory chamber (fig. 4A, B). 
pee= 
Deis Dopp 
A. Right tympanic bulla of Uncia uncia seen from the inner side, with 
the wall of the inner chamber cut open from the summit to the 
basioccipital. p, partition between the chambers ; per, periotic 
bone against which the partition abuts; m, mastoid ; pocc, par- 
occipital ; c, condyle ; d, depression on basioccipital. 
B. The same of Panthera onca. The crest rising from the posterior end 
of the partition marks the stylomastoid groove. 
In some half-dozen skulls of F. pardus from Asia and 
Africa there is no great variation in the internal structure of 
the bulla. In all cases the ridge formed on the wall of the 
