560 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [June 8, 
the crushed ribs. At the anterior part of the belt, however, the 
bony substance is too thick to be thus accounted for, and, had it 
been placed sufficiently far backwards, it might have been supposed 
to be the remains of the pelvic girdle; but we fear its nature must 
be left undetermined. 
The head, we have already observed, is seen in section, lying in a 
reversed position below the ventral margin, which to a limited ex- 
tent overlies it, the muzzle being directed backwards (¢, 6,d). The 
coronal portion is on the slab on which the right side of the trunk 
rests ; the lower or basal portion and muzzle are on the other, which 
may be denominated the left slab, as it contains the left side of the 
trunk. 
The cavity of the cranium was filled with crystallized carbonate 
of lime, and the bone is in a very flaky tender condition, haying a 
chalky or burnt appearance ; and in some places it isso much reduced 
as to be difficult to trace; neither the sutures of the component 
bones nor much of the surface character can be determined. 
The entire length of the skull is 92 inches ; but the extremity of 
the muzzle is wanting. The occipital region is much injured ; it is 
wide, truncated, and angulated at the sides; it measures across 
57 Imches: for about an inch forward the skull widens a little, and 
then suddenly tapers for nearly an inch and three-quarters, at which 
point it is 3 inches wide; here the muzzle seems to commence, and 
from hence it tapers gradually to the broken anterior extremity, 
where it is a little more than an inch and a half wide. 
The portion that remains of the narrow elongated muzzle is in a 
better state of preservation than the rest of the skull, and is 7 inches 
long, and measures across the centre 23 inches. Only a part of the 
upper surface was exposed ; but, aided by the skilful manipulation 
of our friend Mr. Atthey, to whom our best thanks are due, we have 
been enabled to work out the features of this characteristic portion 
of the cranium. The matrix has been carefully removed by that 
gentleman from the sides, and has been dug away from beneath, so 
as to exhibit to some extent the palate. Thus revealed, the muzzle 
is seen to be much depressed, slightly convex above, with the roof 
of the mouth apparently flat, or only a little concave. The maxille, 
which seem to form the sides of the muzzle, are thick at the outer 
margins, but are quite thin above. Unfortunately, however, the roof 
of this portion is much injured ; there is, nevertheless, a strip about 
half an inch wide extending the whole length of the maxilla, along 
the right side, and a small portion near the centre of the left 
maxilla, in a tolerable state of preservation. The central portion of 
the roof is, for the most part, deficient, —little more than the cast of 
it, showing the form. 
The upper surface of the roof, or as much of it as remains, and the 
margins of the maxille are studded with small conical, bluntly 
pointed tooth-like processes, irregularly disposed, but nowhere 
crowded, They are largest at the outer margins of the maxille, 
where they incline outwards, and appear to diminish in length and 
to become erect as they pass inwards towards the middle longi- 
