RECORDS OF IV. A. MUSEUM. 
[23 
As none of the books at hand refer to the difference? and 
resemblances between these portions of the skeleton of the various 
species of Wombat, it is of little value to go more fully into 
the matter. 
The Fore Limbs. 
The clavicles are either missing or have not yet been identified. 
The scapulae are both present in a fragmentary state : of the 
right one there is the bone surrounding the glenoid cavity, which 
has the outline of that part of the scapula of P. latifrons, and a 
small portion of the distal end, or base, of the blade, including the 
beginning of the spine as well as another fragment of the spine. 
The left scapula is more complete ; the major portion of the blade 
is preserved, and the greater part of the spine, as well as half 
the acromion. 
In this part of the skeleton we again see a striking example of 
the variability of form. There is no doubt that the general outline 
of the cranium of this animal is almost identical with P. mitchelli, 
but here once more the form of the part under consideration 
approaches more nearly to the other species, P. latifrons. The 
hind border has the same curvature, and carries a similar 
prominence 1 at the angle furthest away from the glenoid cavity ; 
the spine is likewise thickest near its outer border, but is not as 
stout as the corresponding part of P. platyrliinus of Owen (P. mitchelli 
of more recent authorities). The blade also is narrower in 
proportion to its length than in Owen’s figure of P. platyrliinus. 
The only measurements that can be taken with certainty are : — 
Length of base (vertebral costa) .. .. 50mm. 
Breadth of middle of scapula . . . . 46mm. 
Greatest diameter (length) of glenoid cavity .. 26mm. 
Greatest width (antero-posterior) . . . . 19mm. 
Each humerus is represented : the right one is perfect in its 
proximal three-fourths, and the other in its distal three-fourths. 
Whilst the slender form of the bone reminds one of the platyrhine 
group, the bone is in several respects inclined to be latifront. The 
head of the humerus shows those characters which the size of the 
glenoid cavity of the scapula would indicate — namely, the articular 
surface is wider transversely and extends further down the shaft 
■Owen regards this as one of the points of difference between the species. 
Ext. Mam. Aust., page 361. 
