31 



lous centrum, depressed, and produced forwards into a stout 

 conical odontoid process, and marked below by a strong 

 hypapophysial keel, which, developed on the latter half, 

 thickens backwards. The wide and thin pedicles inclose a 

 high neural canal, support the posterior zygapophyses and a 

 prominent and peculiar neural spine. The latter is flattened, 

 broad, and recurved posteriorly, thinning rapidly forwards 

 into a prow-shaped recurved edge. The transverse processes 

 arising from the latter half of the centrum are undersized 

 and widely perforated at base. The anterior faces are very 

 broad, directed outwards, and slightly rounded from above 

 downwards ; they expand as they diverge (see Fig. 2). The 

 post-zygapophyses are small convex faces, projecting at the 

 base of the neural spine. 



The remaining ccrvicals, five in number, are short, all 

 carinate, except the seventh, and opisthocoelous ; with the 

 faces expanding only slightly beyond the body of the cen- 

 trum. A peculiar feature is a small pit upon the convex 

 anterior face, indicating either a ligamentous attachment 

 with the antecedent vertebra, or a remnant of the notochord. 

 This is a feature we have not noticed elsewhere. A long 

 and heav\- transverse process supports a large and widely- 

 perforated inferior lamella. The pedicles are quite wide at 

 base, inclosing a large neural canal. The entire upper part 

 of the arch is unfortunately wanting. 



The dorsal centra are smaller than the cervical, slightly 

 opisthocoelous, and carinate. They are sub-cylindrical an- 

 teriorly, with decided costal surfaces before and behind ; 

 approaching the lumbar region the}- become sub-triangular. 

 A high neural arch supports a stout, but never very high 

 neural spine ; this projects backwards, keeled in front, ex- 

 panding and deeply grooved behind. The zygapophyses are 

 small and nearly vertical. There is a short and thick trans- 

 verse process. 



The lujjibar vertebree are long, decidedly opisthocoelous, 

 becoming wider and more depressed as they approach the 

 sacrum. The first sacral vertebra presents the same charac- 

 teristics as the last lumbar, only the body of the centrum is 

 slightly shorter. It has a very broad pleuropophysial plate. 

 The remaining sacral vertebrse are broad, and very greatly 



