58 



THE HORSE 



2. The Javan rhinoceros (jR. sondaicus, Cuvier), is 

 distinguished by smaller size, special characters of the 

 skull and teeth, and different arrangement of the plica- 

 tions of the skin, especially in the deep depression which 

 runs upwards and backwards from the middle of the side 

 of the neck, passing over the back, joining its fellow on 

 the opposite side, and thus isolating a plate proper to 

 the neck from the great shoulder-plate. In the Indian 

 rhinoceros (fig. 9) this fold or depression does not pass 

 over the back, but curves backwards and is lost above 

 the shoulder. This species has a more extensive geo- 

 graphical range than the last, being found in the Bengal 

 Sunderbuns near Calcutta, Burmah, the Malay Peninsula, 

 Java, Sumatra, and probably Borneo. A hornless rhi- 

 noceros (R. inermis) which has been described is sup- 

 posed to be the female of this species, but this is a 

 point which requires further investigation. 



II. Ceratorhinus. The adults with a moderately- 

 sized compressed incisor above, and a laterally placed, 

 pointed procumbent incisor below, which is sometimes 

 lost in old animals. Nasal bones narrow and pointed 

 anteriorly. A well-developed nasal horn and a small 

 horn behind it, separated by a considerable interval. 

 The skin thrown into folds, but these are not so strongly 

 marked as in the former section. The smallest living 

 member of the family, the Sumatran rhinoceros (11. 

 sumatrensis, Cuv.), belongs to this group. Its geo- 



