(CU MR. D. M. 8S. WATSON ON 
The sutures surrounding the postorbital (P.O.) are all visible, 
but that with the postfrontal only on the ventral surface. The bone 
forms a massive sheet at the back of the orbit, and forms the 
hinder part of the extraordinary mass of bone which overhangs 
it; it sends back a powerful process along the side of the parietal, 
which forms the inner border of the temporal fossa, and thence 
runs outwards along the front face of the tabulare to be covered 
by the squamosal. 
The sutures separating the postfrontal from the postorbital and 
prefrontal are only visible on the under surface; they are straight 
and run inwards for a very long distance with the postfrontal as 
a narrow strip between them. It probably forms a good deal of 
the knob above the orbit. 
The sutures between the prefrontal and lachrymal ete. are not 
visible, but on the under surface it seems that the nasals are 
narrow bones, each carrying a sharp-edged rib, so as to form a 
groove on the lower surface. 
At the anterior end the specimen shows on the outer surface 
traces of the sutures between the internarial processes of the pre- 
maxillz and the nasals. It is evident that they were very long. 
The premaxille known from the type-specimen have a flat facial 
surface and rather broad internarial processes, the nares being on 
the dorsal surface some distance behind the snout. 
The palatal surface of the premaxilla is entirely formed by its 
tooth-bearing edge, and the lateral border is in contact with the 
maxilla. 
The maxilla is a large bone with a great facial expansion. 
Its palatal exposure is solely formed by its dentigerous margin, and 
it is in contact with the palatine. Thereare large prevomers with 
a long interchoanal bar, the dorsal surface of which rises into a 
high thin flange. Of the quadrate only the articular edge is 
known, which gives no indication of its size. 
The type-specimen of 7itanosuchus ferox gives many bones of 
the lower jaw, all disarticulated. The articular is a small bone 
with a cotylus for the quadrate condyle, which apparently faces 
very nearly backwards. The postarticular part is only repre- 
sented by a small process on the lower side of the bone. The 
anterior part rapidly narrows and finishes in a point. There 
are well-marked articulating surfaces for the prearticular and 
surangular, The angular is flat, and has a deep and very narrow 
notch covered with a reflected lamina exactly as in a Gorgo- 
nopsid. The dentary is a very massive bone, with a deep groove 
on its inner surface for the prearticular, surangular, and angular 
The bone seems to give evidence that there was no freely project- 
ing coronoid process. One interesting feature is that there is a 
very shallow, but quite definite, step in the dentigerous margin 
behind the canine, as in Gorgonopsids, but, of course, relatively 
very much smaller. 
The lower surface of the dentary has a broad surface for the 
splenial, which must have formed the whole of the lower border of 
