RECORDS OF W.A. MUSEUM. 
[17 
The measurements taken are tabulated below and compared 
with those given by Mr. Oldfield Thomas in the British Museum 
Catalogue quoted above. 
Skull Measurements of Phascolomys (in mm). 
Sp. nov. 
P. mitchelli 
P. ursimis 
P. latifrons 
Characters. 
Aged 
Adult 
Aged 
Basal length 
179 
185 161 
143 
167 
Greatest breadth . . 
139 
145 135 
125 
144 
Nasals, length 
83 
81 70 
62 
65 
,, greatest breadth 
50 
55 49 
46 
67 
,, least breadth 
18 
15 15 
17 
29 
Inter-orbital breadth 
43 
63 55 
50 
69 
Breadth between tips of post 
orbital processes 
43 
67 60 
52 5 
90 
Inter-temporal constriction 
36 
47-5 49 
40 
46 
Palate, length 
? 
125 106 
93 5 
no 
Diastema, length . . 
45? 
48.5 40 
31-5 
46.5 
Palatal foramen . . 
13 
14 II 
10 
10 
Basi-cranial axis . . 
54? 
57 50 
48 
58 
Basi-facial axis 
? 
130 113 
96.5 
no 
Facial index 
— 
228 226 
201 
190 
Tooth series, length of 
54? 
57 51 
47 
50 
It will be seen at a glance how the new specimen differs from 
the forms with which it is here compared. In appearance it closely 
resembles P. uvsinus, having the same shaped nasals and the 
narrower cranial portion of the skull, but its size (length) is so 
much in excess of that of this Tasmanian species that it is impos- 
sible to regard them as identical. 
The common Australian Wombat is often found to have a 
skull equal in length, but there are many points of distinction, chief 
among which are inter-orbital breadth and certain other measure- 
ments of the cranium given above. 
It is interesting that in spite of its slender width, the greater 
expanse of the zygomae should increase the total width to such a 
degree that it is very little less than that of the largest Wombat in 
the British Museum list. 
Briefly stated, though the skull of this specimen is almost as 
long as that of the largest quoted in the British Museum list ; the 
inter-orbital breadth, the breadth between the tips of the post-orbital 
processes and the inter-temporal constrictions are appreciably less 
than in the much smaller P. ursimis. 
