RHINOCEROS TICHORHINUS. 331 



potamus." Of the soundness of Grew's determination, 

 the reader will be able to judge by comparing the figure 

 of the fossil (fig. 121) with that of the entire cranium 

 of the Rhinoceros tichorhinus, which is placed above it, 

 at the head of the present section. 



Two distinct rough surfaces (h h) may be traced on 

 the upper part of the fragment, shewing that the species 

 of Rhinoceros to which it belonged was two-horned ; and 

 the anterior surface rises towards its middle part, as if to 

 form the longitudinal ridge, which there characterises the 

 fossil species, and distinguishes it from the African two- 

 horned Rhinoceros, which has a depression at the corre- 

 sponding part of the skull. But more decisive evidence 

 of the relationship of the Chartham fossil to the extinct 

 Rhinoceros tichorhinus is afforded by the remains of the 

 strong and thick bony wall which descended from the 

 bones supporting the horns to form the partition between 

 the two cavities of the nostrils, and give additional 

 strength to that part of the skull. 



Cuvier concludes, from this peculiar structure of the most 

 common extinct species of two-horned Rhinoceros of the 

 northern and temperate regions of Asia and Europe, that it 

 bore longer and more formidable nasal weapons than do any 

 of the known existing species with two horns. In the 

 Chartham fossil, a great part of the bony septum is broken 

 away : it remains in the entire skull figured (fig. 1 20) . 

 The skull of the extinct Rhinoceros was relatively longer 

 in proportion, and terminated forwards by a peculiar modi- 

 fication of the nasal bones, which, by the medium of the 

 thickened anterior part of the osseous partition-wall were 

 anchylosed, or joined by a continuous bony mass, with 

 the fore-part of the intermaxillary bones, or those that 

 terminate the upper jaw. 



