176 CIMOLIOSAURUS RICHARUSOM. 



missing, which is not surprising, as having only one articulation 

 with the neck, and that an exceedingly small one, it possibly 

 became detached before the carcase settled down in its grave of 

 clay ; that a considerable time elapsed previous to its being finally 

 covered over may be inferred by the aggregations of oyster shells 

 upon the vertebrae and bones, which could only have been attached 

 when the body was uncovered. The spinal column consists of 

 71 vertebrae, of which 31 are cervicals, 19 dorsals, 2 sacrals, and 

 19 caudals. The shoulder-girdle is nearly complete, consisting of 

 coracoids, scapulae, and pre-scapulae, two fore and one hind limb 

 (humerus and femur), small portions only of the pubes, the ischia 

 and ilia, radius, ulna, tibia, fibula, carpal, and metacarpal bones, 

 several phalanges, and ribs. 



VERTEBRAE. The dorsal vertebras resemble the last two 

 cervicals, the centrum is rough, its height and length about equal, 

 and both shorter than the breadth. In the fore part of the dorsal 

 region the neural spines are inclined backwards, they then 

 become vertical, and afterwards incline forwards. The 

 neural-arches are not well preserved, only a few retaining their 

 transverse processes. The centra are altered in form to allow the 

 ribs to be raised on the neural arch ; their sides are compressed 

 with a foramen near the middle of some ; the neural spines 

 widen and are extremely compressed from side to side ; the 

 position of the transverse processes remain the same through- 

 out. The cervical and caudal vertebrae are characteristics of this 

 long-necked, short-tailed family, by the non-attachment of the ribs 

 to the sboulder-girdle of the former, and by the long chevron bones 

 of the latter. 



PECTORAL GIRDLE. The coracoids have a short median 

 symphysis five inches long ; and diverge from their posterior 

 border, taking an outward diagonal direction, and terminating 

 by a convex sweep outwards into an extremely thin dilated 

 plate. The bones are thickest where the scapula and humerus 

 articulate, forming a transverse ridge or keel. This ridge is equally 

 marked on the dorsal as well as the ventral surface. Their width 



