RECORDS OF W.A. MUSEUM. 
[49 
position, one of them perfect and the others more or less damaged. 
The mandible agrees in dimensions with Owen’s figured specimens 
and exhibits the posterior predental foramen Ireneath the fore part 
of the second molar (M3) as in the type. 
The three remaining specimens, a right mandible with sockets 
of the four molars, the anterior portion of the right lower jaw 
with the teeth Pi, P3 and Mi and a fragment containing in situ 
the canine (C) and the two premolars (Pi and P3) bear a strong 
resemblance to the S. tirsinus described by McCoy they all show 
a posterior predental foramen below the anterior part of the first 
molar as is usual in this species, but in view of the opinion expressed 
by R. Lydekker ^ have been classed as S. lamamis (Owen). 
This species has not previously been recorded for Western 
Australia. 
Sub-Order DIPROTODONTIA. 
Fam. Phalangerid.®. Sub-Fam. Diprotodontin.®. 
Dipretodon, Owen (1838) » 
D. australis, Owen (1838) 
THE DIPROTODON. 
The abundance of remains of Diprotodon found in deposits 
similar to those of Balladonia would suggest that a number might 
be expected in the soaks at that locality. 
Although the bones presented by Messrs. Ponton and Sharp 
are all fragmentary, it has been possible to indentify many of them 
as belonging to this animal. They include fragments of ribs, 
vertebrae, shoulder blades, leg bones and the pelvis, as well as small 
portions of the maxilla and mandible containing the roots of cheek 
teeth. 
The first lot of specimens, consisting of teeth only, had been 
exposed to the surface for a considerable period, and were, therefore, 
1 Prodromus of the Pal»ontology of Victoria, Decade VII., pp. 11-13 and figures 
on Plates Lxn, and lxiii., 1882. 
’ Catalogue of the Fossil Mammals in the British Museum (N.H.) Part V., 
p. 265, 1887. 
» In Mitchell’s “ Three Expeditions into Eastern Australia,” Vol II., p. 362, 
1838. 
< Loc. cit. 
