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 Rh. bicornis, was discovered by John 
Brown, Esq., F.G.S., in the fresh-water pliocene deposits 
Fig. 132. 
Lower jaw, Fh. leptorhinus, 4 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 anda half; the depth of 
the jaw behind the last molar teoth is four inches nine 
Imes; 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 2, 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’ (tom. cit. pl. ix., fig. 9), which 
