214 
MACROPODID.*:. 
Hypsiprymnus ( Bettongia ) Ogilbyi. 
Mr. Gould distinguishes, under the name B. Ogilbyi , a 
species of Hypsiprynmus, which is found in the Swan River 
district, and also in South Australia. This I cannot think is 
sufficiently established as a species, distinct from the Hyjm- 
prymnus penicillatus. The first two or three specimens of 
B\ Ogilbyi which came under my notice, having the feet of a 
deepish brown colour, the tail of a rusty brown hue, and the 
apical third black, below as well as above, I imagined they 
might, perhaps, prove distinct from the H. penicillatus; but 
recently I have examined many specimens, both from West 
and South Australia, mid others from New South Wales, ami 
found them to vary somewhat in each of those localities, as 
to their colouring. All that can be said is, that the speci¬ 
mens of the Tufted-tailed Hypsipryrani from the western and 
southern districts are generally somewhat darker in the 
colouring of the feet and tail than those from New South 
Wales; but it is certainly, in some cases, difficult to distin¬ 
guish these, which I can but regard as local varieties, by this 
difference of the colouring. 
Amongst a series of skulls, a great portion of which were 
lent me by Mr. Gould, and some of which are contained in 
the British Museum Collection, in the museum of the Zoolo¬ 
gical Society, and that of the Iloyal College of Surgeons, I 
could discover no points of distinction between those which 
were from specimens of B. pcnicillata and those named by 
Mr. Gould B. Ogilbyi. Of the skulls of B. pcnicillata , 
from New South Wales, but few specimens have come under 
my notice; hut of B. Ogilbyi . I have examined many speci¬ 
mens of both sexes, and of young and adult individuals: the 
size and proportions of some of these skulls arc expressed in 
the following table of measurements:— 
