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- 

 rMnus, 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- 

 liar, in the Rhinoceros tichorhinus, both for its length and 



