HALMATURUS DERBIANUS, Grm/. 
Derby’s Wallaby. 
Face and Fore Part of a Male and of a Female, of the natural size. 
My figures of this animal were taken from speeimens proeured on Kangaroo Island, at 
the entranee of Speneer’s Gulf, I mention this partieularly, beeause I have given the name 
of Halmaturm Houtmanni to an animal inhabiting the Abrolhos of Western Australia, whieh 
Mr. Waterhouse eonsiders may be only a variety of the present species ; but this is a point 
which time alone can determine. These insular animals are extremely puzzling, and con- 
siderable judgment is required in ascertaining their specific value. 
The Halmaturus Derhianus is somewhat allied to the H. Parma ; still they are unques- 
tionably distinct. They form, with H. dorsalis, a little section of the group quite different 
from that constituted by H. Thetidis, H. stigmaticus, H. Billardieri, and H. brachyurus. 
The H. Derhianus is very numerous in all the thick brushes of the islands on which it 
has been found. It is bustling and quick in all its actions ; and it is only by the aid of 
dogs that it can be forced from its retreat, or to leave the numerous runs formed by 
it beneath the underwood in all directions. 
For the pleasing life-like representation of this species, much credit is due to Mr. Richter; 
for nothing could be more faithful. 
The reader is referred to the description accompanying the reduced figures given on the 
next Plate for a full account of this animal. 
