C. dispar.
The articular faces in the cervicals are a broad transverse oval, faintly emarginated above for the neural canal. In the dorsals and lumbars the cup continues transverse, and the emargination is deeper, but in the anterior caudals the outline becomes a vertical oval. There appears to have been thirteen mandibular teeth.
| Length of axis with odontoid process | 32 lines | 100 |
| Width between diapophyses | 26.8 | 103 |
| Length from edge of cup to end of ball in eleventh vertebra | 25 | 100 |
| Width of ball | 14 | 56 |
| Depth of ball | 12 | 43 |
C. Wymani.
In the cervical vertebrae, the outline of the articular faces is transversely cordate. The centra of the anterior dorsals are elongate, and much constricted behind the diapophyses. In the anterior caudals, the articular faces are a broad vertical oval.
| Length of axis with odontoid process | 19 lines | 100 |
| Width between diapophyses | 17 | 89.4 |
| Width of ball | 8 | 42.1 |
| Depth of ball | 7 | 36.7 |
| Length of sixth cervical, without ball | 13 | 100 |
| Width of cup | 9 | 69.1 |
C. rex.
The cervical vertebrae have very broad, transversely oval faces, with indications of emargination. The dorsals are elongated, with transverse faces, and a distinct superior excavation for neural canal. The articular ends of the anterior caudals are vertically oval.
| Length of posterior cervical vertebrae | 44 mm | 100 |
| Vertical diameter of ball | 24 | 54.5 |
| Transverse diameter | 29.5 | 67 |
| Length of a dorsal vertebra | 52 |