J. W. HULKE ON A NEW WEALDEN DINOSAUR. 423 
of a deep, flattened, oblong plate, of which one border, the upper, 
is produced in the form of a stout process for the distance of about 
3°5 inches. Towards its free end this process is compressed ; and 
at its base its lower margin curves downwards and then forwards to 
form with the angle of the lower border one horn of the segment of 
a circle which constitutes all that remains of this border of the bone. 
This concavity, which appears to me to be articular, I regard as the 
iliac portion of the acetabulum ; and I look upon the angle just men- 
tioned as the pubic attachment, and the process above it as the pre- 
acetabular. That which I consider to be the outer surface of the 
wide plate, or body, of the ilium is sinuous, being alternately slightly 
concave and convex, from above downwards; whilst the inner or 
mesial surface has a stout ridge produced backwards from the pra- 
acetabular process, and marked above the acetabulum by pits, which 
I take to be the impressions of the attachments of the sacral ribs. 
The remaining fragments of this bone show its postacetabular por- 
tion to have been of large extent; unfortunately they could not be 
reunited so as to give its figure. 
The characteristic form of the ilium, with its long preacetabular 
process, would alone suffice to place the animal represented by these 
remains in the order Dinosauria; and the wide platform-lke root of 
the transverse process springing from the summit of the lofty neural 
arch in the dorsal vertebre corroborates this reference. From the 
earlier and later Mesozoic Crocodilians with constant amphiccelous 
centrum (Teleosawri, Goniopholis) it is easily distinguished by its 
opisthoccelous dorsal centra. From Suchosaurus*, Owen, which it 
somewhat resembles in the keeled lower border of the centrum, it 
may be distinguished by the subcordate contour of the articular ends 
of the dorsal centra. A comparison also of No. 28 with a dorsal 
vertebra of Suchosaurus in which the capitular costal facet occupies 
the same position relatively to the prezygapophysis as in No. 24, 
and is therefore presumably from the same part of the vertebral 
column, shows that in this new Saurian the basal width of the 
transverse process is much greater relatively to the length of the 
process than it is in Suchosaurus. From Jqguanodon Mantell it is 
easily known by the different form of the ilium and of the caudal 
vertebra, as also by the characters of the dorsal vertebra just de- 
scribed. These criteria also serve to distinguish it from the allied 
Hypsilophodon Foxit. It may be thought incumbent on me to 
establish its distinctness from Streptospondylus ; the opisthoccelian 
form of the dorsal vertebree seems to require this, convexo-concave 
vertebra such as are usually referred to the genus Streptospondylus, 
being not unfrequently found in the Wealden beds in the Isle of 
Wight. From those of Streptospondylus recentior, Owen t, and 
S. grandis (young individuals are of course imagined) my vertebra 
differ so obviously in figure and in texture that a mistake is not 
possible. As little necessary is a formal proof of their distinctness 
* From evidence in my possession I rather incline to regard Suchosaurus as 
not improbably a Dinosaur. 
t Mantell, Fossils of British Museum. 
