108 RAIN.OPIINA EC OS 
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 lighter.” Ex type British 
Museum. Adult 9. 
Measurements. “Head and body 520 mm.; tail 660; hind foot 
165; ear 40, (measured in the flesh). Skull: greatest length 109 mm. ; 
basilar length 68; zygomatic breadth 77; greatest breadth across 
orbital region 72.5; greatest diameter of orbit 28; interorbital con- 
striction 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.” Ex type British 
Museum. 
“This interesting monkey was readily distinguished from its 
nearest ally, R. bieti, by its dark black back, yellowish-buff under parts, 
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 under parts were, 
as in the adult, a rich yellowish-buff colour.” 
This fine species is the fourth of the present genus, which contains, 
in so far as the face and particularly the nose is concerned, the most 
bizarre members of the Primates. They are all large, conspicuous 
animals, and the discovery of the present species indicates that prob- 
ably many more unknown forms belonging to this great order yet 
remain to reward the efforts of enterprising collectors. 
