RECORDS OF W.A. MUSEUM. 
[i»' 
inner angle of the condyle is produced inwards, and the coronoid 
process higher and narrower ” than in the platyrhine species. The 
Cave form has an outline which agrees almost entirely with Owen’s 
figure of P. latifrons, the chief variation being the shorter inner 
projection of the condyle. The under contour, the length of the 
diastema, and the depth of the jaw agree exactly with Owen’s 
figures. 
As far as the size and shape of the condyle and its inner 
angle, which extends inwards past the coronoids, are concerned*, 
there is not the slightest doubt that they are most distinctly platy- 
rhine. 
Of the alveoli of the lower incisors, that of the right tooth 
seems to be perfect, and recalls Owen’s figures of P. wombatus when 
viewed from above, but the lateral border is nearly vertical, and 
does not slope backwards as is usually the case with P. platyrhinus .. 
The backward extent of the symphysis is as far as the vertical 
groove of the third cheek tooth, thus differing from Owen’s figures- 
of P. platyrhinus and P. latifrons. Subsequent observers 1 have 
however, shown that this feature is so variable in individuals as to 
render it quite useless for specific determinations. 
There seems to be no intercommunicating foramen from the 
entry of the dental canal to the outer surface of the base of the 
coronoid, and it is unfortunate that the tender nature of the bone 
renders it impossible to undertake the cleaning necessary to ascer- 
tain whether this really is the case. 
The post-symphysial foramina are only 4mm. in a horizontal- 
line from the posterior margin of the symphysis, a distance which is- 
much exceeded in the usual platyrhine Wombats. 
The dentition of the mandible is very similar to that of Owen's- 
P. platyrhinus, the most noticeable variation being the rounding by 
wear of the anterior edges of the incisors. 
Measurements. 
The total length of the mandible 
Extreme width of the mandible 
Length of diastema 
Length of symphysis 
Thickness (depth) under M3 
Length of cheek series of teeth 
Length of four molars (Mi-M4) 
140mm. (5jin.) 
I3gmm 
28mm 
62mm 
35 mrn 
52mm 
47mm 
1 De Vis, Proc. Linn. Soc. N.S. Wales, Vol. VI. for 1891, p. 239. 
