12 
FOSSIL REPTILIA OF THE 
In the general osteological characters of the vertebral column we find this 
genus agreeing with Hylceosauriis and Teleosaurus. 
None of the anterior vertebrae present the opisthocoelian modification cha- 
racteristic of the Crocodilian genera Streplospondylus and Cetiosaurus, and in a 
minor degree of the Dinosaurian genera Megalosauriis and Iguanodon. 
Not any of the anterior dorsal vertebrae developes the spinous process of so dis- 
proportionate a length as they present in the carnivorous Megalosauriis . Although 
the neural arch becomes loftier than Crocodilia in the dorsal region of the spine, 
the exterior of the peduncles or neurapophysial laminae does not present the 
complex configuration produced by the strong, oblique ridges underpropping 
the diapophysis in Iguanodon and Megalosauriis. Upon the whole, I find the 
closest agreement to be between Scelido- and Hylieo-saurus in the characters of the 
vertebral column ; and I infer for both, but especially for Scelidosaurus, a greater 
aptitude for swimming than in the larger Binosauria. 
Scapular Arch and Limb. Tabs. II and III, 
The scapular arch has been compressed transversely to a degree which has 
produced fracture of the right coracoid (Tab. II, 52'), without material displace- 
ment in its relations to the left (Tab. Ill, 52 and 52') » but with corresponding ap- 
proximation of the two scapulae (Tabs, II and III, 51 and 51'), wiiich have squeezed 
together, with some fracture and more dislocation, the interposed parietes of the 
thorax. The right scapula (Tab. II, 51 ) is least displaced; it extends along the 
first seven dorsal vertebrae, overlapping the spines of the last two. It is long and 
rather narrow ; thickest above the humeral articulation, narrowest at its middle 
part, becoming broader and thicker towards its free end or dorsum, which 
describes a moderate and regular convex curve. The length of tlie bone to the 
fore part of its coracoid end is 13 inches; its least breadth is 2 inches; that of 
the base is 4 inches 10 lines. The body of the scapula describes a slight con- 
vexity OLitw^ard in its course to the humeral joint, the expanded portion in front 
of wdiich is gently excavated for a triangular space 4 inches long ; the apex being 
upward, with a well-defined boundary, indicative of the attachment of a muscle to 
this part. The anterior border is almost straight through three fourths of its 
extent from the base, then becomes slightly concave to the anteriorly produced 
angle of the coracoid end. The posterior border is more deeply concave, through 
the production of the thickened part of the bone to form the humeral articulation 
(Tab. Ill, h). So much as is exposed of this surface is slightly concave transversely, 
slightly undulating in the opposite direction, 2 inches in breadth. The articu- 
lation (c) with the coracoid is a straight harmonia. At the upper part of the 
