movable snout during life. The mandibular dental foramen is 
much lower down than obtains in the skulls of. wombats. In life 
during normal occlusion the lower tusks operated against the 
small incisors of the upper jaw. 
AI EASLREAIENTS. 
Total length: .520 mm. 
Greatest width: 420 mm. 
Width of supra-occipital bone: 325 mm. 
1 he above should be taken in conjunction with the data already 
published in “ The Tasmanian Naturalist." 
In addition to the mandibular characters already published 
in detail, the skull departs from the type in various ways, chiefly 
in the enormous elongation of the facial in proportion to the 
cranial part of the head, this being consistent with the elongated 
symphysis already noted as a specific character of X. tasmanicum. 
As minor points, the production of the nasals to a greater extent, 
the wider divergence of the tusks and method of insertion of the 
same, together with the different shape of the mandible, all furnish 
characters of comparative importance. Less stress has been laid 
upon tooth structure, since these obviously vary enormously in 
individuals, but such correlated variations as an elongated chin 
and shoulder girdle are of deeper meaning. 
uS r n w 
pAiicnAL 
MELBOURNE 
