388 RHINOCEROS. 



orbit, under the chaffron. The occipital part is not nearly so perfect 

 now as in Cortesi's time, the left side of the occipital crest being broken 

 off, together with the posterior and upper part of the parietals, to an 

 extent of five inches in length by four in width. In consequence, the 

 posterior termination of the sincipital echancrure and the posterior ex- 

 tension of the occipital crest behind the occipital plane are no longer 

 seen. The diploe cells are exposed where the upper plate of the parietal 

 has been removed, giving rise to the tessellated ragged lines of De 

 Christol's figure, but less marked, and not extending so far forward as 

 he shows. The right zygomatic fossa is covered over by a cake of 

 matrix, about a quarter of an inch thick, as high as the fracture of the 

 parietals ; the left zygomatic fossa is covered by a thinner cake of the 

 same. The lower three-fourths of the occipital are entire, more espe- 

 cially on the left side, and the lower half on either side, downwards 

 towards the styloid process, is covered by a thick mass of matrix, all 

 the central portion being bare. A great amount of hard matrix covers 

 the whole of the facial portion from the orbit forwards, as far as the 

 anterior third of the nasal arch, concealing entirely and blocking up the 

 left side of the nasal fossa. This is the mass represented by the dark 

 shade (A) in De Christol's figure. 



The cranium, as a general character, looks more elongated, more 

 slender, and much less massive than in the Rhinoceros tichorhinus ; the 

 cerebral portion is less elongated than in the latter, and the lateral 

 edges of the occiput less projected backwards. The anterior slope of 

 the cerebral pyramid makes a very considerable angle with the plane 

 of the frontal, more perhaps than is seen in Cuvier's figure, but con- 

 siderably less than is shown by Cortesi's, where the pyramid is exagge- 

 rated. The posterior face of the occiput inclines a little forwards as it 

 ascends from the occiput upwards, more so even than represented by 

 Cuvier's figure, and is then over-arched by the projecting sides of the 

 occipital crest, which are produced backwards. It differs entirely from 

 the reclined occipital plane seen in R. tichorhinus. The bones of the 

 nose are elongated and slender in thickness, rather wide, and not much 

 arched above ; they are nearly of uniform width, thinning as they ad- 

 vance forwards. The nasal suture between them is distinctly marked 

 and open ; there is not the slightest indication of a dividing nasal septum ; 

 and I confirm entirely Cornalia's remarks upon this point. They are 

 not so much arched as represented in Cuvier's figure, resembling more 

 the outline given by De Christol. There is a slight central boss along 

 the axis near the tip of the nasals, but I can detect nothing like an 

 indication either upon the nasal or upon the frontals of the granular 

 rugous inequalities which indicate the base of horns ; the frontal, it is 

 true, is cracked and fissured, but the nasal surface is entire and smooth. 

 A strip of about an inch wide of matrix has been left near the tip and 

 side of the right nasal bone. The absence of horned rugosities may be 

 owing to the immature age of the animal, which is shown by the teeth 

 and open sutures to have been not quite adult. De Christol describes 

 the vault of the nasal bones below to be excavated in a boat-shaped 

 fashion ; nothing of this kind is seen in Cortesi's fossil, but their lower 

 surface is still concealed by matrix. The character of the nasal bones 

 entirely warrants the designation of leptorhinus, or thin nasal-boned 

 Rhinoceros, given to this species by Cuvier ; these bones are infinitely 

 less massive than in the African Rhinoceros or the Indian species. 



