Cope.l '^ '^ [Dec. 18, 



Of the vertebra3 several are so distorted by pressure as to be uncliaracter- 

 istic. Two well preserved anterior dorsals have transversely oval articular 

 surfaces excavated openly above for the neural canal. One is from a 

 position anterior to the other, and these surfaces are less oval, though still 

 transverse. The centra of both are very concave in protile below, and 

 expand both inferiorily and laterally to the edge of tlie cup. A deep 

 groove surrounds the base of the posterior face. In the anterior dorsal 

 the neural arch is preserved. It exhibits an approach to a zygosphen 

 articulation more marked than in any other Liodon, and is hence nearer 

 Clidasies in this respect as well as in the slender pterygoid. A zygosphen 

 is not separated from the zygapophyses, owing to their connection by a 

 lamina of bone. The notches at the posterior end of the arch for this 

 prominence are marked. The neural spine had a long anterior ala, the 

 base of which extends to the summit of the neural arch. It presents a 

 fine sti'iatiou vertical to the centrum and oblique to the edge of the bone, 

 as is seen in C. propython, Cope. The diapophysis on this vertebra looks 

 obliquely upwards and carries a vertical articular surface which is con- 

 cave behind. The line of its lower extremity falls 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 surfaces are striate-rugose on these and the other vertebrae. 

 One of the free hypapophyses of a cervical is preserved. It has a sub- 

 trigonal 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 striate-rugose. Sides with a shallow groove. 



The scapular arch is repieseuted 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 (four only), and is fiat, and thin above. Its 

 anterior extension is greatest below ; its posterior above, at the superior 

 angle. The lower posterior 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 difi'erent plane, and is the rudimental 

 acromion. The articular surface is rugose, and the glenoid cavity not 

 less so. 



The proximal portion of the coracoid is fiat. It presents the usual 

 foramen near the anterior margin, and the shorter concavity of the 

 anterior margin leads to the belief that the anterior extremity of the bone 

 is the more prolonged as in CUdastes propython. 



^he glenoid cavity is not concave, but merely two adjacent fiattened 

 rugose surfaces. 



Consequently the humerus has no head, but merely an elongate articular 

 surface, which exhibits a median keel and a short angular expansion near 

 the middle. This bone is of remarkable form, more resembling that I have 

 described in CUdastes propythoii - than any other, and very diiTerent from 

 that described by Leidy in Platecarpus tympaniticus. It is a broad flat 



* See Trans. Amor. I'hilos. Soc., 1SG9, 219. Tab. Xll, fig. 17, 



