U SIMIID^. 



ashy grey, passing into black on the extremity of the tail, which is tufted. The 

 fingers are dark, almost blackish, and the distal half of the foot is almost wholly 

 black, especially the toes : the whole of these parts, with the exception of the 

 hands and feet, although ashy grey, has a slight ferruginous tinge in the fully 

 mature animal : the remainder of the limbs is more or less ferruginous or yellowish 

 grey, palest on the lower portion of the hind limb. The throat and the whole 

 of the chest and upper part of the belly rich orange or golden-yellow, paling to 

 yellowish on the rest of the under parts and on the inside of the limbs. Tail about 

 one-third longer than the body. 



The skull of S. pileatus is considerably smaller than that of S. entellus, but 

 is about the same size as the skull of S. ^jriamus. Unlike the Indian Semnotes, 

 it has the supraorbital ridges only moderately developed and the lambdoidal 

 ridge but feebly prominent. The brain-case is more globular than in the other 

 species owing to the absence of the last-mentioned character. The facial portion 

 slopes considerably forwards, as in S. schistacem, and, like that species, the nasal bones 

 are straight, but flattened, so that they project but little anterior to the orbits. 

 The face has thus a much-flattened aspect in life. The muzzle is moderately long 

 and broad. The teeth are about the same size as in S. priamus ; and, as in 

 Semnopitheci generally, the teeth of the female are considerably smaller than those 

 of the male, and the palate in that sex is somewhat shorter than in the male. 

 In the latter it is moderately deep with the alveolar borders slightly posteriorly 

 convergent. The posterior palatine foramen is compressed. 



In a male that had been kept in confinement from youth to maturity the 

 maxillary series of teeth occupies a space measuring 1-50, whereas in a ferine male 

 the teeth are somewhat smaller, occupying an area of only 1-30 inch, the palate 

 being deeper and shorter than in the former individual. Although the ferine male 

 is older than the domesticated individual, its supraorbital ridges are less developed. 

 The breadth across the fronto-malar suture equals the distance between the anterior 

 border of the foramen magnum to the outer margin of the premaxillary foramen, 

 and the greatest zygomatic breadth falls short of that interval half the length of 

 the premaxillary foramen. 



This is a common monkey in Northern Assam, from whence it ranges 

 south to Tippera, and through Arracan and Upper Burma to Tenasserim. The 

 type of S. potenziani came from Tenasserim, but Blyth's S. pileattis was a half- 

 grown specimen in the Barrackpore menagerie near Calcutta, and alleged to be 

 of Malayan origin. It is now, however, well ascertained that this monkey is 

 not at all uncommon in Tippera and Assam, and I am therefore disposed to 

 think that the locality originally assigned to S. pileatus was erroneous, and that 

 the animal came either from Tippera or Assam. In this respect it would be 

 analogous to the case of M. speciosus (arctoides) also described from a Barrackpore 

 specimen said to have been brought from Japan, but probably procured in 

 the same region as S. pileatus. I observed a troop of this species at Tsingu Myo 



