206 
MACROPODIDjE. 
The skull of H. Graii approaches most nearly to that 
of H. Gaimardi , but differs in being rather broader, in 
having the auditory bull© much larger, and the palate 
shorter— characters pointed out by Messrs. Quoy and Gaimard, 
as distinguishing, from H. Gaimardi , a skull found by them 
in Dirck Hartogs Island, Western Australia, upon which they 
found the Eypsiprymnus Lesuenri. I may add, diat the 
zygomatic arch is rather deeper, and the anterior pair of 
incisors are broader, than in H. Gaimardi 1 . In a drawing of 
the skull of II. Lesuenri , made at Paris, and kindly lent me 
by Mr. Owen, I find the anterior part of the cranium is 
somewhat mutilated, and wants the incisors: hence this latter 
character was not noticed. Judging from the drawing 
in question, I can feel scarcely a doubt that the II. Lemeuri . 
and the H. Graii , are specifically identical, and if this view 
be correct the former of these two names should be used. 
The dimensions in the last column are taken from the drawing 
referred to. The skull, of which the dimensions are given in 
the first column, is remarkable for possessing five true molar 
teeth, the last of which is very small—less than one line in 
diameter. In the skull in question, the permanent premolar 
is perfectly developed, and considerably worn, and so are the 
molars, and, moreover, the little extra molar does not corre¬ 
spond in form and size to the ordinary last molar, that is 
here represented by the penultimate tooth. 
1 The width of the two foremost incisors together, and in their natural 
position, varies from nearly 3 lines to nearly 3$ lines, measured at the base, 
in H. Graii ; in H. Gaimardi they give about 2i lines, and in H . penicillatus 
about the same—sometimes 2] lines ; they are much more compressed in the 
two species last mentioned. 
