504 Mil. GUY DOLLMAN ON A SNUB-NOSED MONKF.Y. 



long to conceal the digits nor extending over the nails. Entire 

 ventral surface of body yellovirish buff, the buff tint most domi- 

 nant on the throat and anterior portion of the belly ; no trace of 

 any grey or dark-coloured hairs on the chest and neck. Inner 

 sides of arms yellowish white, the colour almost white at the 

 elbow and visible from above as a light cream-coloured border, the 

 contrast between the black hairs on the outer side and the bright 

 yellowish white of the inner side of the arm being most marked. 

 The light yellowish colour extends right down the inner sides of 

 the limbs as far as the hands and feet, where it is somewhat duller 

 and dirtier. Tail long, measuring 100 mm. longer than that of 

 hieti ; clothed with comparatively short hairs, except at the tip, 

 where the hairs are rather longer and form a distinct tuft. 

 Colour, above dark black mixed with creamy-white down the mid- 

 line with a creamy-buff' border; terminal tuft almost pure white, 

 faintly washed with pale buff; ventral surface considerably 

 ligliter. 



Skull like that of hieti as regards the general shape, but smaller 

 and with smaller cheek-teeth. Supraorbital region rather more 

 like that of roxellance than of hieti ; muzzle foi'med as in the 

 latter species, without any well-marked concave depression of the 

 pre maxillary region. Interorbital breadth less than in I'oxellance.. 

 Zygomatic arches almost parallel, not expanded laterally. 



Dimensions of the type (measured in the flesh) : — 



Head and body 520 mm. ; tail 660; hind foot 165 ; ear 40. 



Skull: greatest length 109 mm. ; basilar length 68 ; zygomatic 

 breadth 77 ; greatest breadth across orbital region 72-5 ; greatest 

 diameter of orbit 28; interorbital constriction 11 ; greatest width 

 of cranium 68"3 ; palatilar length 32'9 ; width of palate (inside 

 m\) 20"5 ; length of upper tooth-row, from front of first premolar 

 to back of last molar, 30. 



ffab. Yen-bay, Song-koi River, Tonkin. 



Type. Adult female. Original number 8. Collected by 

 Mr. Alan Owston's collector, Orii, on September 14, 1911. 



This interesting Monkey was readily distinguished from its 

 nearest ally, Ehinopithecus hieti, by its dark black back, yellowish- 

 buff underparts, and light-coloured tail. 



A young specimen, sent with the type, was coloured in much 

 the same manner as the adult, only very much paler, the crown 

 of the head and hind limbs being yellowish tinged with grey, 

 whilst the back was just commencing to become dark. The entire 

 underparts were, as in the adult, a rich yellowish-buff colour. 



In the course of describing this new Snub-nosed Monkey, 

 Mr. DoUman had been in correspondence with Prof. E. L. 

 Trouessart, of the Paris Museum, concerning the specimens of 

 Ehinopithecus hieti under his charge, and was indebted to Prof, 

 Trouessart for much valuable assistance, most liberally given. 

 Without this assistance the description of this new Ehinopithecus 

 would have been a far more difficult matter. 



