370 RHINOCEROS. 



lar attachments in relation to the stronger and heavier 

 horns.* 



The true characters of the skull of the Rhinoceros lepto- 

 rhinus, and its distinction from that of the Rh. tichorhinm 

 being established, there remains only to compare it with 

 the skulls of other known species of Rhinoceros. The 

 descriptions by Cuvier, ' Ossemens Fossiles, 1 4to., 1824, 

 torn, v., pt. ii., p. 502 ; by Dr. Kaup, ' Ossemens Fossiles 

 de Darmstadt, 1 4to., 1834, 3 me cahier, p. 39, and by M. 

 Christol, ' Annales des Sciences Nat.," 1 1835, p. 76, of 

 the extinct two-horned species, referred by Cuvier to his 

 Rh. incisivus, but first accurately determined by Dr. Kaup 

 under the name of Rh. Schleiermacheri, and shortly after 

 by M. Christol under that of Rh. megarhinus, leave no 

 room for doubt as to its specific distinction from the Rh. lep- 

 torhinus. Cuvier and Dr. Kaup are silent as to the presence 

 or otherwise of a bony nasal septum in the Rh. Schleierma- 

 cheri, and the excellent figure of the skull of that species in 

 Dr. Kaup's work shows no trace of it. It is equally absent 

 in the original figure of the Montpellier specimen, given 

 by M. Christol in the ' Annales des Sciences, 1 torn, cit., 

 pi. ii., fig. 5 ; and the latter author expressly states " that 



* These specific distinctions of the Rh. tichorhinus, and Rh. leptorhinus, 

 will be readily appreciated by the subjoined table of comparative dimen- 

 sions : 



Rh. tichorhinus. Rh. leptorhinus. 



In. Lin. In. Lin. 



Length of the skull (in a straight line) . 31 28 



Least breadth between temporal ridges . 36 15 



Breadth of nasal bones opposite the hind border of ^ g Q 510 



the nasal aperture ... $ 



Breadth, opposite middle of nasal aperture . 66 49 



Breadth of the anterior extremity of nasal platform 40 29 



Length of nasal aperture . . . .80 8 10 



Breadth of upper part of occiput . . .80 40 



Do. of middle of occiput . . .96 69 



