12 PROBABLE NEW SPECIES OF DENDROLAGUS ; 
descends over the base of the tail and spreads around the 
vent. The upper surface of the base of the tail is deep 
brown in a patch, which tint also descends obliquely to the 
lower surface where it bécomes black and continues so 
along that surface to the tip. The deep brown patch on 
the upper part of the base fades into light rufous-brown, 
which extends on the upper surface to its distal third, 
where it passes into black. The hands and feet are black, 
the face reddish-grey, becoming silky fawn on the frontal 
region, the ears deep brown externally, yellowish-brown 
within. The tail, which is somewhat imperfect, is still 
considerably longer than the head and body together; it 
is clothed with coarse recumbent hairs which gradually 
lengthen distally and appear to form a tuft at the tip. The 
hair of the back radiates from a point well behind the 
shoulders; that of the neck, proceeding forward, is continued 
over the head to the forehead, where it meets the back- 
wardly directed hair of the facial region and with it forms a 
transverse ridge directed downwards and forwards behind 
the eyes towards the under surface of the head. 
From these details the following brief characters may be 
derived :—Tail much longer than head and trunk together, 
hair of the neck and that of the head meeting in a ridge across 
the frontal region; on the back dark brown, mantle and 
fore limbs rufous-brown, passing into red on the neck; 
tail, parti-coloured. 
I have no skin of Mr. Collett’s D. dumholtzt to compare 
with this, but, judging from the figure and description of 
that species in the “ Proceedings of the Zoological Society 
of London, 1884,” p 387, I cannot but think it quite unlike 
the one under notice, more especially as it would appear 
from a remark of Mr. Collett that the colouring of his species 
is pretty constant. Its black head, whitish throat, and the 
comparatively uniform colouring of its short tail are the 
leading points in which D. /umholtzi appears to differ from 
its more northern congener. The rather brief description 
of it given unfortunately does not mention the disposition 
of the hair. This Daintree River animal resembles D. 
brunit in the length of its tail, and Mr. Ramsay’s dorzanus 
in having that organ distinctly parti-coloured, but it may 
be observed that in drwmz? the hair ridge is behind the head, 
