_ 166 MARSUPIALIA 
branches of large trees, and feeding on the bark, leaves, and fruit. 
They are confined to the tropical forests of the regions mentioned ; 
and it would appear that we must regard their resemblance in the 
proportions of the limbs and habits to the Phalangers as having 
been independently acquired. 
Dorcopsis..—Hind limbs relatively less large than in Muacropus. 
Muffle large, broad, and naked. Ears small. Fur on nape directed 
wholly or partially forwards. Hind claws not concealed by hair. 
Tail with a nearly naked tip. Skull long and narrow, with the 
auditory bulle not inflated. A well-developed canine. First upper 
incisor somewhat short; second and third nearly equal, notched 
externally. Fourth premolar greatly elongated antero-posteriorly, 
its length generally exceeding the united lengths of the first and 
second molars ; a distinct inner ledge, and vertical grooves on both 
sides. Molars low and rounded, with the median longitudinal 
bridge between the ridges almost or quite aborted, and the talon in 
front of the first transverse ridge very narrow, and not extending 
to the inner side. The two series of cheek-teeth parallel, or nearly 
so, instead of converging at the extremities. 
Three species of this genus are known, all of which are from 
New Guinea ; the type being D. muelleri. In the characters of the 
dentition, the forward inclination of the fur on the nape, and other 
points, this genus is allied to Dendrolagus ; but Dorcopsis macleayt 
connects the other species with Afucropus. 
Lagorchestes.2-—Muffle entirely or partially covered with hair. 
Fourth hind digit with a long claw, not concealed by hair. Tail 
rather short, evenly furred, without a spur. Skull with short 
muzzle and diastema, and inflated auditory bulla. Canine present, 
sometimes very small. Fourth premolar large, not constricted in 
the middle, with a continuous inner ledge. 
This genus includes the Hare-Kangaroos, a group of small 
hare-like animals, great leapers and swift runners, which mostly 
affect the open grassy ridges, particularly those of a stony character, 
sleeping in forms or seats like the common hare. Their limbs are 
comparatively small, their claws sharp and slender, and their muffle 
is clothed with velvet-like hairs. Three species—J/. leporoides, ML. 
hirsutus, M. conspicillatus. 
The range extends over the whole of Australia, but does not 
embrace Tasmania. 
Onychogale.2— Muffle hairy. Fourth hind claw long, narrow, 
compressed, and sharp. Tail long and tapering, covered with short 
hair, and furnished at the tip with a horny spur. Skull nearly as in 
Macropus, with the auditory bulle more or less inflated. Canine 
? Schlegel and Miiller, Verh. Nat. Ges. Nederland, p. 180 (1839-44), 
? Gould, Monograph of Macropodide, pl. xiii. (1841), 
* Gray, in Grey's Australia, vol. ii. appendix, p. 402 (1841). 
