300 RHINOCEEOTID^. 



Mr. Edward Blyth has published a memoir on the living Asiatic 

 species of Rhinoceros, with figures of some of the skulls in the Mu- 

 seum of the Society, which may be consulted with advantage (see 

 Journal of the Asiatic Society of Bengal, xxxi. 18G2, p. 151) ; but 

 unfortunately I have not had the opportunity of comparing the skulls 

 with those in the London collections : — 



Rhinoceros indicus : narrow typo of skuU, t. 1. f. 1, t. 2. f. 1. 



li. sondaicus: broad type of skull, t. 1. f. 2, t. 2. f. 2, from the 

 Bengal Sundarbans and Tenasserim ; t. 1. f. 3, t. 2. f. 3, aged, from 

 Java. 



M. sumatranus, t. 3. f. 1, 2 (male), t. 3. f. 3 (female). 



R. sumatranus, Tavoy, t. 4, f. 1-4. 



The figures are from photographs, and they show the form of the 

 occipiit in the three species, confii'ming the fact that the occiput of 

 the two-horned species is always flat and erect. 



1. RHINOCEROS. 



Skin divided into distinct shields by deep folds. Lumbar fold 

 well marked, and extending from the groin to the back. Horn one, 

 short, conical. Upper Hp with a central prominence. Skull : — fore- 

 head broad, flat, or only slightly rounded ; the occipital end shelving 

 from the occipital condyle to the occipital crest ; the occipital con- 

 dyles lai'ge, oblong, very prominent ; lachrymal bone moderate. 



The skulls of the larger number of species of this genus have the 

 forehead and the upper surface of the nose flattened ; this is seen in 

 the living animal. But one species, of which there is only a single 

 skull of a young animal in the British Museum, has the forehead 

 and nose subcyKndrical (that is, high on the central line and arched 

 on the sides), as is the case with the Sumatrau and the African 

 Rhinoceroses. This character, I have no doubt, is equally visible in 

 the living animal. 



A. Forehead and nose behind the horn flat. 



Nose square on the sides above; nasal short R.javamcus. 



Nose shelving on the sides above ; upper jaw slightly contracted 

 before the grinders. 



Nasal broad, elongate R. unicornis. 



Nasal narrow, short li. nasalis. 



Upper jaw much contracted before the grinders; nasal narrow, 

 short R. Floiveri. 



B. Forehead and nose subcylindrical, shelving on the sides above ; nasal 

 elongate R, stenocephalus. 



A. The forehead and the nose behind the base of the hoi-n fiat, both in the 

 living animal and skull. Eurhinoceros. — Gray, P. Z. S. 1867, p. 1009. 



* Upper jaiv slightly contracted in front of the grinders. 



1. Rhinoceros javanicus. (Javan Rhinoceros.) B.M. 



Skull broad ; forehead behind the horn broad, flat, or sHghtly 



