TUFT-TAILED RAT* KANGAROO. 
217 
with yellow hairs internally; externally with hairs of the 
same colour os those of the head, hut brownish at the 
margin; the tarsi of a rusty brown hue, but with the toes of 
a deepish brown, especially at the sides; tail rusty brown, 
with the apical half, which is covered with bushy hairs, 
brown-black; the under side brown, assuming a deep brown 
tint at and near the tip. The dimensions are given in columns 
C and D : those of column C are from a male specimen, and 
those of column D are from an individual which is apparently 
a female. 
A female specimen in the British Museum Collection (b of 
the Catalogue) differs from the above in having the fur some¬ 
what softer, and the apical third of the tail perfectly black 
beneath as well as above. For its dimensions, see column 
E. This is no doubt an immature individual. 
The British Museum collection contains likewise indi¬ 
viduals from South Australia, which have, as in the one last 
mentioned, the apical portion of the tail black both above 
and below, and one in which it is brown beneath. Thev varv 
as to the intensity of the colouring of die feet. I may notice 
also a specimen in die Zoological Society’s Museum, in 
which there is a small tuft of white hairs at the end of the 
tail. The skull presents all the usual characters of the 
species. 
A 
B 
C 
D 
E 
Length from nose 
In. Lines. In. 
Lines. 
In. Lines. 
In. 
Lines. 
In. Lines. 
to root of tail 
15 0 
14 
G 
15 
0 
1G 
0 
13 0 
* 4 of tail 
41 of tarsus and 
12 9 
12 
0 
13 
0 
12 
0 
10 6 
claws 
4 2 
4 
4 
4 
4 
4 
3 
4 2 
14 of ear. 
i 14 
1 
1 
1 
0 
1 
0 
11 
As regards the skull in II. penicillatus (pi. 0, fig. 3), I 
have only to remark, dmt it is narrower than other species of 
