342 RHINOCEROS. 
ging the foundation of a store-house at Chatham, Kent. 
The figure shows the outer side of the two crescentic or 
semi-cylindrical lobes, which form the crowns of the lower 
molars of the Rhinoceros. Douglas presented the speci- 
men to Sir Ashton Lever; and, after the dispersion of 
the Leverian collection, it was purchased by H. Warburton, 
Esq., M.P., late President of the Geological Society, and 
was presented by him to the Museum of the Society. 
With regard to other parts of the dentition of the lower 
jaw of the Rhinoceros tichorhinus, allusion has been already” 
made to the traces of sockets of incisive teeth, observed in 
the expanded symphysis of Siberian and British speci- 
mens (p. 334). M. Christol has described and figured the 
lower jaw of a tichorhine Rhinoceros,* discovered in the 
post-pliocene marine deposits, (‘‘les sables marins supé- 
rieures de Montpellier,”) which, like the specimen de- 
scribed by Pallas, presented four alveoli at the symphysial 
extremity ; the two outer or lateral cavities were two 
inches deep, and one inch in diameter at the outlet: 
the left socket contained the base of a fractured in- 
cisor; the two middle sockets were reduced to minute 
circular pits, not exceeding three lines in depth, and 
four in diameter. The last true molar is not quite in place, 
and its anterior crescent is very little worn, indicating 
that the individual with the above-deseribed condition of 
the lower incisors was scarcely full grown, certainly not an 
* Annales des Sciences Naturelles, 1835, tom. iv. pl. 2, fig. 1 and 2. The 
second premolar (the first in the specimen figured by M. Christol) seems to me 
to be proportionally too large, and too much advanced, for the species to which 
this lower jaw is referred. 
+ The words of Pallas are, “In apice maxille inferioris, seu ipso margine, ut 
ita dicam, incisorio, dentes quidem nulli adsunt ; verumtamen apparent vestigia 
obliterata quatuor, alveolorum minusculorum equidistantium, é quibus exteriores 
duo, obsoletissimi, sed intermedii, satis insignibus fossis denotati sunt.” Novi 
Commentarii Petropol., t. xiii. p. 600. 
