14G 



aiul extends iiuteiiuily tVoiii tlie uiilcrioi- uiargin of the cot} Ins I'ur I he qua- 

 drat um. 



Of the vertebrge, several are so distorted by pressure as to be uncharac- 

 teristic. Two well-preserved anteiior dorsals have transversely oval articuhir 

 surfaces excavated openly above I'or the neural canal. One is from a position 

 anterior to the other; and these surfaces are less oval, (hough still transverse. 

 The centra of both are very concave in |)rolile l)el()w, and expand botii infe- 

 riorly and laterally to the edge of the cup A deep groove surrounds the 

 base of the posterior face. In the anterior dorsal, the neural arcli is presiMved. 

 It exhibits an approach to a zygosphen articulation, more marked than in any ■ 

 otiier Pldtccarpus, and is hence nearer Sironecte.s in tiiis respect, as well as in 

 the slender pterygoid. A zygosphen is not separated lioni llie zygapophyses, 

 owing to their connection by a lamina of bone. The notches at the posterior 

 end of the arch for tliis prominence are marked. The neural spine had a 

 long anterior ala, the i)ase of which extends 1o tlie summit of the neural arch. 

 It presents a fine slriation vertical to the centrum and oblique to the edge 

 of the bone, as is seen iu C. propython, Cope. The diapopliysis on this ver- 

 tebra looks obliquely upward, and carries a vertical articular surface, which is 

 concave behind. The line of its lower extremity tiiUs the depth of the neural 

 arch below the latter, and of its upper reaches the apex of the canal in front. 

 The more posterior vertebra has, as usual, a broader articular rib-surface, the 

 diapophysis being flattened above and below. The marginal and angular sur- 

 faces are striate-rugose on these and the other vertebrsTe. One of the free 

 hypapophyses of a cervical is preserved. It has a subtrigoual section, and is 

 longer than wide, and obtuse. Its posterior faces are exceedingly rugose. 



A cervical rib is compressed and short. Head narrow, large, simple ; the 

 adjacent sides striatc-rugosc. Sides with a shallow groove. 



The scapular arch is represented by an entire right scapula and proximal 

 part of right coracoid. The former is broader than in any of the species in 

 which I have seen it, and is Hat and thin above. Its anterior extension is 

 greatest below; its posterior above, at the superior angle. The lower poste- 

 rior margin is strongly concave and thickened. The antero-superior margin 

 is a regularly convex arc of more than 180°. The lower portion in front 

 is on a different plane, and is the rudimental acromion. Tlie articular surtiuc 

 is rugose, and the glenoid cavity not less so. 



The proximal portion of the coracoid is flat. It presents the usurd fo; a- 



