BLACK-TAILED KANGAROO. 
139 
The dimensions in the first column ore from the mule 
specimen above described, those of the second column are 
from a specimen in the British Museum, and the other two 
are from specimens in the Paris Museum. Column No. 3 
gives tlie admeasurements of an individual brought from Port 
Jackson, in the expedition of the Astrolobe, and is the original 
of M. Lesson’s description. The dimensions in the last 
column art* taken from a very old specimen, which is, 1 
suspect, tlie original of Desmarests description under the 
name Kangurtts Brtntii . On the bottom of its stand is 
written “ Kangaroo Filandre, K. dAra, Didel pit is bran!' 
I perfectly agree with Lesson, that this is the same as his 
if. Ualaba/us. The Didefp/igs Brttnii is a very distinct 
animal. 
The following dimensions are from a skull of J/. Ualabatus 
in tlie collection of the British Museum, and which is labelled 
as having been procured in Mosquito Island :— 
This skull is rather narrower, and more elongated than 
usual; the nasal bones are long, very convex, but little ex¬ 
panded behind, and somewhat contracted in the middle; the 
bony palate terminates very nearly in a lino with the hinder 
margin of the last molar; tlie posterior palatine openings are 
rather small compared with many of the Halmaturi; tlie 
occipital opening is very large, and has a distinct notch in 
the upper margin; tlie premolar tooth is unusually large, 
its length being equal to tlie first true molar added to about 
one-third of the length of the second, whilst, in most of the 
Kangaroos, the corresponding tooth is about equal to the first 
true molar in length, as in M. Thetidis , and sometimes 
shorter, as in M. giganteus. In the more elongated form of 
tlie skull, and greater size of the premolar, the M. Uala¬ 
batus evinces an approach to the New Guinea Kangaroo. M. 
Brunii . The incisor teeth of the upper jaw are represented 
on Plate 5, fig. 12. 
