THE AUSTRALIAN TREE KANGAROO. 133 
robust ; limbs, sub-equal in length and thickness; size, superior; 
fulvous, brown ; back and sides much pencilled with black ; from 
the hind neck to the occiput nearly black ; muzzle, black ; top of 
head and temples, rufo-fulvous ; facial ridge, a patch on the throat 
and one below the armpit pale buff; hinder part of the arm and 
hinder edge of forearm and wrist, dull rufous; mid-region of the 
leg, dark brown, defined above by a faint haunch stripe ; hinder 
lower part of shank and hinder upper part of metatarse, bright 
buff; upper base of tail with an obscure stain of chestnut brown ; 
beneath and inside limbs dingy buff. 
The hairs of the back and sides are light yellowish brown, many 
of them entirely so, but most of them tipped more or less with 
black ; the black tips not being equally distributed the result is a 
streaky mixture of tawny yellow and black. Anterior to the centre 
of radiation, black tipped and wholly black hairs begin to pre- 
dominate and yield on the nape a nearly pure black surface. 
The hairs of the upper surface lose their black tips entirely on the 
mid-line of the flanks, and, becoming yellower, pass into the 
impure buff of the under surface, which spreads with a redder 
tint on the hinder edge of the fore leg, and posteriorly extends 
over the base of the tail. ‘The upper surface of the proximal half 
of the tail beyond the base is yellowish brown, passing gradually 
into the brownish black of the tufted end; the lower surface is 
brownish black to near the base, and here a faint continuation ot 
its hue upwards into the suprabasal stain shews the persistence 
of the generic pattern of colouring in this region. ‘The dark 
brown tint of the thigh and knee fades as it passes down the front 
edge of the shank, and vanishes above the ankle. The inner 
surface of the ear is clothed with fulvous hairs and fringed 
anteriorly with rufous. ‘The hands and feet are, as usual, black. 
The pads of the hind feet are very broad and short and are 
covered with rough irregular granulations. The fifth toe-nail 
reaches as far forward as the end of the pad of the fourth toe. 
The fourth toe-nail is-—at least in one foot—compressed, regularly 
arched and acuminate; in the other its form is somewhat less 
that of a prehensile claw. In the hand, which is armed with 
powerful claws, it is interesting to observe a distinct tendency to 
the separation of the toes into two groups, as in the native bear 
and some Phalangers, but with this difference that in the present 
animal it is the two outer toes only which are in some degree 
opposable to the rest. A similar tendency is observable in D. 
bennettianus, 
