THE ILLUSTRATION OF THE SKULI 
The skull when recovered was very badly broken, and had 
apparently been so mutilated prior to its inclusion in the matrix.’ 
Accordingly, it was slowly dried in a dark room during several 
months, the whole of the thirty-six pieces being strengthened 
with glue. In spite of every care, however, some slight crumbling 
along the fractured edges was found to be unavoidable, and in 
restoring the skull no attempt was made to force the parts 
together, the idea being rather to outline the cranium as a whole. 
The slight overlap in the orbital regions and the defective angle 
of the right jaw are of small importance, since the first is obvious 
and can be allowed for. while the left ramus, although broken off 
at the third molar, is perfect in the posterior regions, and has been 
set up separately to assist in the study of the condyle and corono’d 
process, big. 5 of my last paper shows the mandible with its 
several imperfections as recovered from the matrix. 
SKULL. 
According to Professor Owen, the skull of the Xototherium 
is shorter in proportion to its depth and width than that of the 
Diprotodon. and differs from the latter in the way in which the 
maxillary or facial portion of the skull is bent up upon the cranial 
portion, and in the angle made by the palate, with the basis cranii. 
Since this description was written it has been shown that the type 
skull of the Diprotodon referred to was incorrectly restored to 
the extent of tour inches, and therefore the first contrast noted 
hardly holds good. All the rest of the characters are absolutely 
correct. This alteration also reduces the likeness claimed by 
Professor Owen to exist between the Diprotodon and the kan¬ 
garoo, and brings the former animal nearer to the existing 
wombat, and incidentally nearer to the Xototherium also. 
As will be seen by a glance at the illustration, the skull is 
very massive, and nearly as wide as it is long, the zygomatic 
arches standing away from the cranium to a distance of 130 mm., 
and, armed with pre-massiter attachment processes, make the 
skull extremely powerful in this region, and constitute one of its 
chief generic characteristics. 'The maxillo-nasal part of the skull 
is sharply bent up upon the cranium, the fronto-nasal suture being 
ankclosed to extinction. I lie nasals are wide, and completely 
roof over the nasal cavity, the maxillary moieties being restricted 
to the outer edges instead of contributing to the roof of the cavity 
as in the wombat. As thus constituted, these maxillary moieties 
form two bonv processes standing out from the face line at an 
angle of 60 degrees. The pre-orbital foramen is nearly round 
instead of being cuniform as in the wombat, its size suggesting a 
