LK DUUN'S KANGAROO. 
183 
may add the structure of the anterior extremities. On the 
other hand, in the peculiar form of the nasal hones, which are 
contracted in the middle, and expanded almost equally at 
each extremity, and the broad interorbitul space, the .1/. 
Brunii evinces an uffinity with the Tree-Kangaroos (Dendro- 
lagus) which inhabit the same country. This affinity is also 
indicated in the comparatively large size of the premolars (if 
the dotted lines in Dr. Muller’s figures indicate the size and 
form of these teeth correctly), and in the presence of canine 
teeth. In Dendrology, moreover, wo find the zygomatic 
arch narrow in the vertical direction, ns compared with the 
tme Kangaroos, and in this respect they agree with M. 
It run it , as well as in the form of the lower jaw, which has 
the angle much less raised than usual ; indeed the skull of a 
Tree* Kangaroo, if more elongated, would more nearly re¬ 
semble that of M. Brunii , than any other species of the 
Macropodidte. The upper incisor teeth are remarkably small, 
and the posterior incisor apparently 1ms no external vertical 
groove in M. Brunii , and an approach to this animal is 
further evinced in the Tree-Kangaroos, in the structure of 
these teeth, and more particularly in the Dendrology ursinus. 
Lastly, I may notice that the fore legs are comparatively large 
in M. Brunii , and that the hairs radiate from a centre, in 
the buck of the neck, in the same way as in D< ndro/agus. The 
animal under consideration, however, I must observe, differs 
from the species of Dendrology in having the muffle naked, 
and in possessing tolerably long posterior palatine openings 
to the skull. The dimensions of the skull of M. Brunii , 
taken from Dr. Mfiller s figures, are as follows :— 
Inches. Lino 
Length of skull . 5 2 
Width ... .. . 2 2 
Length of nasal bones . 1 1 ] 
Width at base . 0 5 » 
Width near apex ... ... ... ... 0 4 ^ 
