SEMNOPITHECUS. 17 



Semnopithems nepalensis, Hodgson, Journ. As. Soc. Beng. vol. ix. 1840^ p. 1313 ; Cal. Joum. Nat. 



Hist. vol. ii. 1842, p. 212. 

 'Preshytis entellus, Gray, Cat. Hodgson, Nepal Mamm. &c. 1846, p. 1, var. 2j Cat. Monkeys 



and Lemurs, B. M. 1870, pp. 14, 15. 

 Freslytis schistacetis, Blyth, Ann. and Mag. Nat. Hist. vol. xx. 1851, p. 313 ; Cat. Mamm. As. Soc. 



Mus. 1863, p. 11; Jerdon, Mamm. India, 1867, p. 6; Blanford, Journ. As. Soc. Beng. vol. 



xli. 1872, p. 32. 



General colour of the upper parts, except the head, dark slaty, darkest on the 

 outside of the fore-limbs ; dark on the thighs, but paling towards the ankle ; hands 

 and feet concolorous with the limbs. Head pale yellow, nearly white ; chin, 

 throat, chest, and under parts and inside of limbs yellowish. The tail is concolorous 

 with the back, darkening towards its tip. The ears, palms, and soles are black. 

 The fur long, wavy, and profuse. 



In old individuals the general colour is paler, inclining to grey and even to 

 white on the head, while in the young and adolescents the feet are occasionally 

 darker than in adults. 



Hab. — Bhutan, to the north-west Himalaya, west of Simla, at elevations from 

 4,000 to 13,000 feet. 



The skulls of S. entellus and S. sohistaceiis present certain features by which they 



can be separated the one from the other, and the differences that exist between them 



are greater than those which subsist between S. entellus and ^S*. priamus. The skull 



of S. schistaceus is somewhat larger than that of ^S*. entellus. The supraorbital 



ridge of ^S*. schistaceus does not form so thick and wide a pent roof as it does in S. 



entellus, and it is less forwardly projected. But the most marked distinction is to 



be observed in the much longer facial portion of the skull of ^S*. schistaceus, i.e., in 



the interspace existing between the middle of the supraorbital ridge to the extremity 



(alveolar) of the premaxillaries, an interval which is considerably longer than in 



^S*. entellus. When the skulls of the two forms are placed in natural position, it is 



observed that the supraorbital ridges of S. entellus are projected more anteriorly to 



the lower margin of the orbit than in S. schistaceus. This character is brought out 



when a line is produced from the middle of the sxipraorbital ridge to the tip of the 



premaxillaries. In S. entellus the line rests against the supraorbital margin, and 



may either touch or not touch the distal ends of the nasals and the extremities of 



the premaxillaries, thus including two well-marked concavities, one the fronto-nasal 



and the other the naso-premaxillary, the latter being the larger and the best 



defined of the two concavities. In S. schistaceus the line does not touch the extremity 



of the premaxillaries, but owing to the almost straightforward projection of the 



nasals passes a long way anterior to the alveolar margin of the premaxillaries, and 



if it were not that the supraorbital ridge is swollen, the line would be almost 



wholly in contact with the nasals. This forward projection of these bones gives 



rise to a much greater breadth of the maxillae, between the inner border of the orbit 



and the nasal portion of the premaxillary, than occurs in S. entellus. The external 



nasal orifice, owing to the forward projection of the facial bones to a much greater 



c 



