406 



UNGULATA 



plate, and a strongly-marked buttress at the antero-external angle 

 (not distinctly shown in the figure). ' The visceral anatomy, accord- 

 ing to Beddard, 1 does not differ materially from that of the next 

 species. In respect to its dentition and anatomical characters 

 this species is indeed more nearly allied to the Sumatran than to 

 the Indian Rhinoceros ; and thereby indicates that the division of 

 the existing Rhinoceroses into separate genera is not advisable; 



Fig. 170. — Javan Rhinoceros (Rhinoceros sondaicnis). 



Ceratorhinc Group. — The adults with a moderate-sized compressed 

 incisor above, and a laterally placed, pointed, procumbent canine 

 below, which is sometimes lost in old animals. Nasal bones narrow 

 and pointed anteriorly. A well-developed nasal, and a small frontal 

 horn separated by an interval. The skin thrown into folds, but 

 these not so strongly marked as in the former group. The 

 smallest living member of the family, the Sumatran Rhinoceros, R. 

 sitmatrensis, Cuvier, now represents this group. Its geographical 

 range is nearly the same as that of the Javan species, though not 

 extending into Bengal ; but it has been found in Assam, Chittagong, 

 Burma, the Malay Peninsula, Sumatra, and Borneo. So far as 

 can be determined during the life of the type specimen, it appears 

 that the hairy form from Chittagong, described as R, lasiotis, is only 

 a variety of this species. 2 The molar teeth of the Sumatran Rhino- 

 ceros are almost indistinguishable from those of the Javan species, 



1 Trans. Zool. Soc. vol. xii. ; see also Proc. Zool. Soc. 18S9, p. 9. 

 2 See Beddard and Treves, Proc. Zool. Soc. 1889, p. 9. 



