360 RHINOCEROS. 



men (fig. 132), which, in like manner, differs as much 

 from the lower jaw of the Rh. tichorhinus (fig. 123) as it 

 resembles that of the Eh. bicornis, was discovered by John 

 Brown, Esq., F.G.S., in the fresh-water pliocene deposits 



Fig. 132. 



Lower jaw, Rh. leptorhinus, nat size. Clacton, Essex. 



at Clacton on the Essex coast. It consists of the right 

 branch of the lower jaw, wanting the angle and coronoid 

 ascending process and the end of the symphysis, and it 

 contains the last and penultimate molars, and the sockets 

 of four molars anterior to these. The entire length of the 

 specimen is one foot six inches and a half; the depth of 

 the jaw behind the last molar tooth is four inches nine 

 lines ; its depth behind the third molar tooth is three 

 inches four lines. The extent of the molar series, from 

 the front of the second socket to the back of the last socket, 

 is ten inches. I assume the anterior alveolus, (fig. 133, p 

 2,) which lodged a two-fanged premolar, exceeding one inch 

 in antero-posterior extent, to have been the second of the 

 series ; the deep depression, exposed on the broken part of 

 the symphysis anterior to this socket, is the dental canal ; 

 it is shown at , fig. 133, in which a view of the alveolar 

 border of the jaw is given on the same scale as that of 

 the figure of the lower jaw of the Rhinoceros leptorhinus 

 in the ' Ossemens Fossiles ' (torn. cit. pi. ix,, fig. 9), which 



