176 MOSTLY MAMMALS 
In 1899 the professors of the Paris Museum were enabled 
to publish, with excellent coloured plates, the description 
of a second species of the same group, also coming from 
Tibet and the adjacent districts of North-Western China. 
This second species, which may be popularly known as 
the slaty snub-nosed monkey, is fully as large as its more 
brilliantly coloured relative, which it also resembles in the 
form of its nose. The tail is, however, much more bushy, 
and long-haired throughout. And while the colour of the 
upper-parts and outer and front surfaces of the limbs is 
dark slaty brown, the cheeks, under-parts, and thighs are 
mostly pure white; the naked portions of the face being 
flesh-coloured. 
The specimens of the slate-coloured species in the Paris 
Museum were obtained in the north-west extremity of 
Yun-nan, on the left bank of the River Mekong, in the 
neighbourhood of Yerkalo, and it seems evident that the 
species inhabits the crest of the long range separating 
the valley of the Mekong from that of the Yang-tsi-kiang. 
During the summer it is probable they frequent that side 
of the range which overlooks China, while their winter 
quarters would appear to be the side directed towards 
Tibet. The native name of “tchru-tchra,” or snow-monkey, 
sufficiently indicates the severity of the climate of the 
region they inhabit. Probably the Blue River forms the 
line of division between the distributional areas of the slaty 
and the orange species, the latter being found in Southern 
Kansu, Northern Sze-chuan, and Moupin. 
Despite their long isolation from the sphere of European 
science, one, if not both, of these peculiar monkeys seems 
to have been known to the Chinese from time immemorial, 
for ina work entitled ‘“ Shan-Hoi-King,” or “ Mountain and 
Sea Record,” which has been supposed to date from earlier 
