18 SIMIID^. 



extent than prevails in ^S*. entelhis, is much longer tlian in that species, and the 

 depth of the face from the distal extremity of the nasals to the alveolar border is 

 much greater. The premaxillaries also are more anteriorly rounded and produced 

 than in S. entellus, thus conferring greater length on the muzzle. Associated with 

 the shorter muzzle of S. entellus and its more downwardly compressed face is a 

 considerable concavity immediately below the orbit, at the base of the muzzle, 

 external to the maxillo-malar suture, but little marked in S. scMstacem. The 

 transverse breadth of the face is proportionally greater than in S. schistaceus, 

 which is also true of the zygomatic breadth, so that the head of S. entelhis is more 

 rounded than in the mountain species. The palate of S. schistaceus is relatively 

 narrower and deeper, and its alveolar borders are more parallel. The teeth of S. 

 schistaceus are somewhat larger than in &'. entellus, and the palate, therefore, is 

 somewhat longer. The petrous bones, also, are not so prominent in the former 

 as in the latter. The symphysis of the lower jaw is considerably longer and 

 broader than in 6'. entellus, and the lower jaw itself is generally more massive 

 and deep. 



Semnopithecus albipes, Is. Geoff. St.-Hil. 



Semnopitliecus alhijfies, Is. Geoff. Cat. Method, des Mammif. 1851, p. 14; Arch, du Mus. vol. v. 

 1852, p. 536; Gervais, Hist. Nat. des Mammif. 1854, p. 61; Wagner, Schreber, Saugeth. 

 Suppl. vol. V. 1855, p. 34; Dahlbom, Stud. Fam. Reg. An. 1856, pp. 87, 89. 



The animal is brownish grey on the body, and more or less yellowish on the 

 head : the anterior extremities are tawny grey and the hind lim])s sullied white, 

 the tail is gi'eyish or brownish, and the under parts of the body are whitish. 

 The face is black, the hair on the head towards the occiput is raised into a kind 

 of short tuft, which is prolonged backwards to near the nape as a small median 

 crest, but it is possible that this may be artificially produced. 



Ft. In. 

 Length of the body from the muzzle to the root of the tail . . 2 1'43 

 „ „ tail 'I 2-06 



This species, the types of which I have examined in Paris, has all the 

 characters of the entelloid group of Semno^ntheci, and notwithstanding its wide 

 separation geographically from the race of S. entellus which has been designated 

 S. priamus and afterwards S. pallipes by Blyth, it is most closely allied to it, — so 

 much so that Gray has regarded the latter as synonymous with S. albipes, but 

 Is. Geoff. St.-Hilaire has distinctly stated that this species is peculiar to Manilla. 

 In its rudimentary crest he saw in it an affinity to the crested Malayan species, 

 but I agree with A. M.-Edwards that Is. GeoflP. St.-Hilaire attached too much 

 importance to the radiation of the hair on the vertex. Had it not been 

 distinctly stated that S. albipes is an inhabitant of Manilla, I should have followed 

 Dr. Gray's example and regarded the two as identical. 



