BHINOCEKOTIDiK. 295 



Suborder IV. NASICORNIA. 



Nose rounded, with one or two horns, on a central line, 

 formed of agglutinated hair. Upper lip prehensile. ■ Cutting- 

 teeth of upper jaw rudimentary or wanting, of lower jaw un- 

 equal, shelving ; outer one elongate, projecting ; central ones 

 cylindrical, deciduous. Toes 3 . 3, nearly of same length, 

 radiating, more or less free, all reaching the ground. 

 Nasicomia, Illiger, Prodr. 1811. • 



Fam. 4. RHINOCEROTID^. 



Nose simple, with one or two horns on the central Une. Upper 



lip Biibprehensile. Toes three or five, united into a broad clavate 



foot, each with a separate broad nail-Uke hoof. Teeth : — Incisors 



variable or wanting, C. ^ . f , P.M. | . f , M. | . |, =28. Molar teeth 



with distinct roots. 



Rhinocerina, Gfray, Ann. PhU. 1825 ; Cat. Mamm. B. M. p. 186. 



Rhinoceroten, Giebel, 8dugeth. p. 191. 



RhinoceratidsB, Owen, Odont. p. 687 ; Schinz, Syn. Mamm. ii. p. 332, 



1845. 

 Rhinoceratina, Bonap. Prodr. Mast. p. 11 ; Oray, Ann. PhU. 1828. 

 Rhinocerosidise, Lesson, N. Tab. M. A. 1858. 

 RhinocerotidEB, Gray, P. Z. S. 1867, p. 1005. 



Synopsis of the Genera. 



I. The shin divided into shields by weU-marhed folds. Skidl with the inter- 



maxillary free, elongate ; zipper cutting-teeth long; nasalbones produced, 

 conical. Asiatic Rhinocerotes. 



1. Ehinoceeos. Horn single, anterior. Lumbar and neck-folds 



of the skin well developed. Part of the occipital bone, near 

 the occipital condyle, and the condyles themselves prominent. 



2. CEaATORHiirtrs. Horns two, one behind the other. Lumbar 



and neck-folds of the skin rudimentary. Occipital end of the 

 skull flat. Condyle not prominent. 



II. Skin uniform, not divided into shields. Sorns two. SkuH — internasal 



cartilaginous; intermaxiilary free, very smeUl; upper cutting-teeth 

 none ; nasal homes broad, rounded. African Rhinocerotes. 



3. EnnsrAsiBE. Head short, compressed; upper hp with a cen- 



tral prominence. Skull short behind ; occiput erect ; nasal 

 bones rounded in front ; lower jaw thick in front ; grinders 

 smaU, in arched series. 



4. Cebaiotherium:. Head elongate, truncated ; upper Hp square. 



SkuU elongate and produced behind ; occiput erect, produced 

 above; nasal bones broad, convex, truncated and sharp- 



