Page 52. 
268 ON HALMATURUS LUCTUOSUS. 
inferior surface of the black skin, from the absence of hair in that 
part. The characteristic manner in which the animal employs its tail 
as a method of support (well shown in “ Proceedings of the Zoological 
Society,” 1874, pl. xlii.), might have almost been predicted from the 
above-described distribution of the hair; for it is evident that only a 
part at the extreme end could have habitually come into contact with 
the ground. 
The only brown hair on the body is that in the pouch, which is 
rufous. There are four mamme. 
There is not the least difficulty in distinguishing Dorcopsis luctuosa 
from D. muelleri. The general colour of the head, back, and tail in 
the specimens of the latter species from Mysol, above referred to, is a 
mouse-chocolate, which becomes duller over the thighs, and of a pale 
grey on the outside of the fore limb. In D. muelleri the general white 
of the abdominal surface expands slightly opposite the orifice of the 
pouch, just above the knees; it, however, does not develop into a 
band over the flank as in Macropus brunii: the white of the throat 
also extends on to the angle of the jaw, and continues forward to 
join the dim white stripe along the upper lip; and there is a second 
insignificant white line under each eye, also (as mentioned by Prof. 
Schlegel) not nearly so marked as in M. bruni. In the male of 
D. muellert the white tip to the tail is as much as three inches in 
length. 
The skull of Dorcopsis luctuosa (Plate [8] VII.) very closely 
resembles that of D. muellert, the following being the two most im- 
portant measurements in adult specimens of the same sex (female) :— 
D. luctuosa. D. muelleri. 
in, in. 
Length of eleull. . .s «ise ssw sioee 41 4°55 
Greatest breadth, from zygoma to 
CY GOLGR ns 55 Ais mis ea eit a cop panels 2:2 2°05 
In some minor details there are slight differences. In D. muelleri, 
as in most species of Macropus, the premaxillary region is bent down- 
wards in such a way that the line formed by the trenchant edges of 
the molar teeth, if projected onwards to the nose, is quite above the 
incisor teeth. In D. luctuosa this bending downwards of the snout is 
not so marked, as will be seen by comparing the side view of the skull 
(Plate [8] VII. fig. 3) and the similar one of D. muelleri in Prof. 
Miiller’s elaborate work above referred to. 
The palatine foramina, one large one on each side, together with 
several much smaller ones behind each, in D. muelleri end behind the 
transverse palato-maxillary sutures, whilst in D. luctuosa their anterior 
margins are formed by the palatine plates of the maxillary bones, 
into which they encroach a short distance. In D. luctuosa the upper 
