158 
MACROPODIDjE. 
specimen of the Af. Derbianus belonging to the Zoological 
Society, and the only difference I could perceive was, that the 
last mentioned cranium was a trifle larger, and had the nasal 
bones broader behind; but then T found the skulls of H. 
Hoiitmanni to vary somewhat in the width of the nasal hones; 
in some being only G lines wide at the base, and in others 
7-^- lines at the same part, and in other species I have found 
the skulls to vary fully as much as is indicated in the follow¬ 
ing dimensions. 
M. Uoutmanni. 
M, Dcrbianht. 
Male. 
Female. 
Inches.Lincs. 
Inches. Lines. 
Inches. Lines. 
Total length of sktdl .... 
3 
9 
3 
7 
3 
n i 
44 width. 
2 
0 4 
1 
nj 
2 
1! 
Width of inter-orbital space . . 
0 
7i 
0 
74 
0 
94 
Length of nasal bones .... 
1 
5J 
1 
44 
1 
Width of ditto behind .... 
0 
GJ 
0 
a 
0 
9 
44 “ near the aper . . 
0 
4 
0 
•a 
0 
Length of posterior palatine openings 
0 
Gi 
0 
64 
0 
H 
44 of the three upper incisor 
teeth . 
0 
44 
0 
*4 
(?) 
41 from upper incisors to 
molars. 
0 
10} 
0 
10 
0 
9i 
44 of upper premolar . . . 
0 
-i 
0 
24 
0 
21 
44 of the five molar teeth taken 
together. 
1 
1* 
1 
04 
1 
24 
44 of lower jaw . 
2 
7 
2 
Gi 
2 
9 
Height of ditto, in a vertical line 
dropped from the corouoid 
process . 
1 
G 
1 
5 
1 
7 
For the form of the upper incisor teeth, see Plate 5, fig. G. 
