PETROGALE PENICILLATA, Gray. 
Brush-tailed Rock-Wallaby. 
Upper Half of the Animal, of the size of life. 
It is not a little interesting to observe how varied are the forms of the various species 
of Kangaroos, and how well each is suited to the physical conditions of that great 
southern land of our antipodes, Australia, — the plains, the forests, the rocks, and the 
trees, each being tenanted by members of this extensive family. Of these the Rock- 
Wallabys constitute a well-defined section, the species of which are active in the extreme 
among the haunts they affect. 
The P. penicillata, the Brush-tailed Rock-WaUaby of the colonists, is an inhabitant of 
New South Wales. A more detailed account of the situations it frequents will be found 
in the page accompanying the Plate with the reduced figures. 
