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been discovered diflPered materially from the rhinoceroses of 

 the present day. The head of the fossil species is not only 

 absolutely much larger than the living species, but it is 

 much larger in proportion to the height of the limbs. The 

 following circumstances, with others less striking, parti- 

 cularized by Cuvier, manifest that the differences between 

 the recent and fossil animals must have been considerable. 

 The occipital surface, which, in the recent skull, is nearly 

 perpendicular, and, in the unicorn, even inclines forwards, 

 extends backwards in all the fossil skulls. The meatus 

 auditorius has its axis vertical in the living species, but 

 is oblique in the fossil species. The fossil species has two 

 horns, but the skull is not shaped like the bicorn of Africa : 

 there is a considerable space between the bases of the two 

 horns in the fossil species, whilst, in the rhinoceros of 

 Africa and of Sumatra, the bases touch. The form of the 

 bones of the nose, and their junction with the incisor bones, 

 differ not only from the other rhinoceroses, but from all 

 other known animals. The point of the nasal bones instead 

 of terminating in a distinct projection, at a certain distance 

 above the incisive, descends, without becoming thinner, be- 

 fore the nasal notches ; and after being separated in three 

 projecting tubercles, becomes united by a portion, which is 

 a little thinner, to the incisive bones, where they form of 

 themselves two other tubercles. All these four bones be- 

 come so consolidated together, that the sutures by which 

 they were connected, as well as that which distinguished 

 the intermaxillary from the maxillary bones, are not percep- 

 tible at only a moderately advanced age. This structure, it 

 is observed by Cuvier, so solid, was doubtlessly intended for 

 the support of the horn, and gives us reason for supposing 

 that it was more strong, and could be applied with more 

 power in this species than in any of those which now exist. 

 As to the incisive teeth, Cuvier thinks, that the fossil 

 animal had them not, at least, in the upper jaw ; and, if in 



