RECORDS OF IV. A. MUSEUM. 
[27 
the hind limb in an article 1 in which he discusses the correctness 
of the assertion that P. mitchelli and P. platyrhinns are one and the 
same species, and that the name P. platyrhinns is reduced to a 
synonym 2 . In the course of his remarks he quotes numerous 
measurements which, together with some collected from Oldfield 
Thomas’ work, and others made from Owen’s figures (loc. cit.) are 
given below in tabular form. 
Measurements (in mm.) 
■5 c 
£2 
<✓> CT 
O <D 
e > e 
1 
*0 
-S' 
to rO 
E/Vo 
s 
O 
*5 Q-> 
a) 
a) 
a,-E. 
Length 
159 
141 
168 
163 
155 
Least transverse diameter of shaft 
15-5 
17 
17-5 
14 -5 
14-5 
Breadth of distal end 
32.5 
37 
39 
Antero-posterior diameter of head 
Distance between the summits of 
20 
24 
26 
40 
the two trochanters 
39 
4 1 
47-5 
44 
Antero-posterior dimension of the 
36 
3 i 
29 
inner condyle 
31 
30 
It will thus be seen that whereas the femur of this form 
has a 
slightly stouter shaft than that of P. platyrhinns, being almost the 
same strength as the bone of P. latifrons figured by Owen (loc. cit.) ; 
it is shorter, the breadth at the distal end is less, as also is the 
space between the two trochanters. On the other hand the 
antero-posterior dimension of the inner condyle of this form and 
P. platyrhinns agrees. In consequence, the bone cannot be referred 
to any of the existing or recognised species on account of a distinct 
variation from any one of them. 
The tibia. The remains of this bone are only fragmentary, 
We have the proximal end and a portion of the shaft of the left ; 
and the head, distal end and almost half the shaft of the right. 
This is unfortunate, as the available parts are too scanty to allow 
of any conclusions being drawn as regards the differences and 
resemblances of the specimens. 
This concludes the description of the identified remains 
•of the skeleton of this animal. As already stated, it is 
1 C. W. De Vis, Proc. Linn. Soc. N.S. Wales, Vol. VI. for 1891, p. 240, etc. 
2 Oldfield Thomas. Catalogue of the Marsupialia and Monotremata in the 
Collection of the British Museum, p. 214, 1888. R. Lydekker, Catalogue 
of the Fossil Mammals in the Collection of the Brit. Mus., part V., 
p. 153, 1887. Murie, Proc. Zool. Soc., London, 1865, p. 851. 
