110 BRITISH FOSSIL REPTILES. 



ments of the fossilized skeleton of other individuals from the lower Lias of 

 Charmouth indicate a larger size, and that the present is not that of a mature 

 Scelidosaur. 



In the general osteological characters of the vertebral column we find this 

 genus agreeing with Hijlceosaurus and Teleosaurus. 



None of the anterior vertebrae present the opisthocoelian modification charac- 

 teristic of the Crocodilian genus Streptospondylus and in a minor degree of the 

 Dinosaurian genera Chondrosteosaurus, Cetiosaurns, and Megalosmirus ; in this 

 respect they come nearer to the vertebral type of the Iguanodon. 



Not any of the anterior dorsal vertebrae develops the spinous process of so 

 disproportionate a length as they present in the carnivorous Megalosaurus. 

 Although the neural arch becomes loftier than that of 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 Chondrosteosaurus, Certain 

 vertebrEe have a small unossified central part, relatively less than in Polypthy- 

 chodon ; none show the extent of permanent chondrosal tissue characteristic of 

 Chondrosteus. Upon the whole, I find the closest agreement to be between 

 Scelido- and Hylreo-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. 



The scapular arch has been compressed transversely to a degree which has 

 pi'oduced fracture of the right coracoid (PI. 49, 52'), without material displacement 

 in its relations to the left (PI. 50, 52 and 52') » but with corresponding approxi- 

 mation of the two scapulse (PI. 49, 50, 51 and 51')) which have squeezed together, 

 with some fracture and more dislocation, the interposed parietes of the thorax. 

 The right scapula (PL 49, 5l) is least displaced ; it extends along the first seven 

 dorsal vertebrse, 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, the margin of 

 which describes a moderate and regular convex curve. The length of the 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 

 convexity outward in its course to the humeral joint, the expanded portion in 

 front of which 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 



