SEMNOPITHECUS. 37 



paling to grey, and tufted. These colours of the upper and under parts are clearly 

 marked. A well-defined, vertically compressed crest on the vertex, expanding on the 

 occiput, where the hairs are shorter. On the forehead the hairs tend to radiate from 

 a centre outwards and forwards and project considerably over the eyes. The hair of 

 the crest and upper parts of the head is blackish, but on the front of the crest it is 

 darker. The face is sparsely covered with fine hairs, which are whitish on the lips, 

 black on the cheeks, and grey on the nose. The whitish hair of the chin and throat 

 is rather sparse, but the hair on the back and flanks is rather long. Ears and face 

 sooty black ; lips somewhat flesh-coloured. 



The young during the first few weeks is covered with rather woolly hair, which 

 is light grey, tipped with white, on the head, back, and upper surface of the tail. On 

 the remaining parts of the body, and on the forehead, cheeks, and chin, it is greyish 

 white. The face is dark leaden. 



Ft. In. 



Length of body to root of tail (adult female) 1 8' 75 



„ of tail without hair . 2 4'25 



JEaUtat. — Java. The S. comatus, Desmarest, having by mistake been assigned 

 to Sumatra. 



The skull of this species is closely allied to that of S. siamensis, so much so that 

 Miiller and Schlegel state that the two are perfectly similar, and since they wrote 

 Is. Geoflfroy has pointed out that this species is always distinguished by only four 

 tubercles on the last inferior molar. The Dutch naturalists were of the opinion 

 that S. siamensis was only a climatic and continental race of this species, and this 

 view of their afiinity is further strengthened by Mivart's observation that the same 

 tooth in S. nigrimcmus and S. cinereus, which are in no way separable from S. siamen- 

 sis^ — a statement which I make after a careful examination of these types and of 

 the specimen on which Mivart's observation rests, — are also distinguished by the pre- 

 sence of only four tubercles on the last inferior molar. There are, however, two 

 striking features of ^S*. siamensis, viz., the white area around the eyes and the white 

 mouth which are almost absent in S. mitratus, the colours of the fur of which are 

 also not those of S. mitratus. The proof of their identity being as yet not satis- 

 factorily established, I have therefore indicated the two as distinct species. 



Semnopithecus siamensis, Miiller & Schlegel. 



Semnopithecus siamensis, Miiller und Schlegel, Verhandl. 1841, p. 60 ; Schinz. Syn. Mamm. vol. i. 



1844, p. 40 ; Is. Geoff. St.-Hil. Cat. Me'th. des. Mammif. 1851, p. 16 ; Gervais, Hist. Nat. des 



Mammif. 1854, p. 63; Wagner, Schreber, Saugeth, Suppl. vol. v. 1855, p. 25; Dahlbom, Stud. 



Zool. Fam. Reg. An. 1856, pp. 88 and 90; Gray, Cat. Monkeys and Lemurs, B. M. 1870, 



p. 16 ; Blyth, Journ. As. Soc. Beng. vol. xliv. 1875, ex. no. p. 9. 

 Semnopithecus albocinereus, Blyth, Journ. As. Soc. Beng. vol. xii, 1843, p. 175; vol. xvi (1847), 



p. 733; Cat. Mam. As. Soc. Mus. 1863, p. 15 ; Cantor, Journ. As. Soc. Beng, vol. xv., 1846, 



p. 174; Wagner, Schreber, Saugeth. Suppl. vol. v., 1855, p. 29. 



