RHINOCEROS TICHORHINUS. 333 
juxta-position : one part of the skull which was recovered 
shewed the rough surface for the front horn; the back 
part of the skull and one half of the under jaw were 
detached. All the bones were in a state of high preserv- 
ation. There were no supernumerary bones to indicate 
the presence of a second Rhinoceros, but a few remains 
of Ruminants, apparently of extinct species. 
The skull of the Rhinoceros, which, with the rest of the 
bones so fortunately preserved, is now deposited in the 
Geological Museum at Oxford, shews the bony partition 
of the nasal cavity characteristic of the Rhinoceros ticho- 
rhinus, and the lower Jaw further illustrates the peculiarities 
of that extinct species. 
As the evidence of a second British extinct species of 
Rhinoceros will, in the sequel, be established by the cha- 
racters of the lower jaw, I subjoin two figures of the 
specimen of that bone from the cave at Wirksworth. 
Lower jaw of Rhinoceros tichorhinus, Cave, Wirksworth. + nat. size. 
In the side-view of this jaw given above, the extent 
of the anterior end of the jaw, called the symphysis, in 
advance of the molar teeth, is shewn: this part is pecu- 
har, in the Rhinoceros tichorhinus, both for its length and 
