xi. MEGALOSA UR US LIMBS. 209 



along the thickened border which connects it with the coracoid. 

 Length twenty-seven inches, breadth of blade in the middle five 

 inches, at the base ten inches. 



The coracoid is generally oval along all its free edge, nearly 

 straight but undulated in its junction with the scapula, emarginate 

 at the posterior edge to receive the humerus. The surface is nearly 

 plane, with a perforation in the middle of the breadth, near the 

 upper edge. Length twelve inches, height seven. 



The other kind of scapula from Stonesfield is similarly bent like the 

 stave of a barrel, and has subparallel edges ; the breadth, nowhere 

 less than seven inches, enlarges toward the upper part, where it is 

 broken off, contracts below to a sort of neck, and then expands in a 

 thick plate to a breadth of thirteen inches. The whole length of the 

 fragment is twenty-four inches. In the lower part, behind the middle 

 of the coracoidian edge, it is deeply and rather obliquely grooved, 

 in this somewhat resembling the corresponding bone of iguanodon 

 figured by Professor Owen (Wealden Fossils, Memoirs of Palaeont. 

 Soc., Plate XIV.), from Rusper in Sussex. The groove, however, 

 in that bone is represented much nearer the posterior edge, and the 

 lower margin is more boldly undulated. It is of nearly double the 

 breadth of the bone figured by Owen, which was 22*8 inches long. 

 No coracoid is known which might correspond with this bone. 



Of the humerus we have two specimens, neither complete ; but 

 one shews the proximal extremity, the contracted shank, and a 

 considerable part of the distal expansion ; the other assists to 

 complete the analogy of the bone with the humerus of a crocodile, 

 which is allied to that of a bird. Bone hollow internally. 



The broad strong arched plate of the ilium is narrowed in front, 

 and ends with a double truncated keel, or rather bearing internally 

 an elevated short keel ; retrally it is broader ; from both ends the 

 lower margin returns to inward curves, and then projects in thick 

 strong processes which receive the pubic and ischial bones. These 

 appear to have been joined in the lower part of the acetabular 

 socket, which probably was perforated at the side. This arrange- 

 ment of the pelvis, which resembles that of a bird, or monitor, 

 and not that of a crocodile, was suggested by Professor Huxley, 

 to whom I mentioned the perplexity caused by the long sigmoidal 

 bone, which Buckland had believed to be a clavicle, and Cuvier 

 conjectured to be a fibula. 



