BRUSH-TAILED ROCK-KANGAROO. 
171 
Inches. Lines. 
length of skull . ... ... 1 2 
Width of ditto ... ... 2 2j 
** of interorbital space . 0 9 
Length of nasal bones . .. ... 1 10 
Width of ditto behind ... ... 0 M 
" near the apex .. 0 31 
Length of posterior palatine openings . 0 71 
“ of the three upper incisors taken together 0 ft] 
“ from tlm posterior incisor to the prcmolar 0 lOj 
M ofprcmolar ... . 0 3J 
** of the anterior three true molars tnken 
together . 0 9j 
•• of lower jnw . ... 2 9 
Height of ditto from apex of coronoid process 1 5J 
The foremost upper incisor tooth is equal in width to the 
third, and much arched in front; the second is much narrower; 
the third has a deep notch on the outer side at the apex, 
which is situated on the posterior third of the tooth; the pre- 
molar is longer than the foremost true molar (see PI. 5, fig. 10) 
Heleropwt albognlarit. Jocrdan. 
This species is described ns having a longitudinal brown line on 
the head ; the cheeks whitish; ears black externally, yellow 
internally; throat white ; chest and holly rust colour; neck, 
and upper parts of back, grey ; lower part of abdomen rusty 
yellow ; feet and tail deep brown, the latter terminated with 
white. 
Total length, including the tail 
Inches. 
... 39 
lanes. 
7 
Fore legs . 
... ... 4 
9 
Hind legs.„. 
11 
10A 
Body .. . 
. 23 
9 
Taii ... 
... 22 
2 
Tarsi . 
. 3 
2 
Head . 
... 4 
n 
Inhabits the mountains south-west of Sydney. 
I feel very little doubt tlmt the above description is drawn 
