Eleventh caudal (vert. 37): Similar to Barnegat skeleton, but spine shorter than centrum and not extending beyond it anteriorly or posteriorly. Metapophyses similar, but wider apart.
Twelfth caudal (vert. 38): Neural arch barely complete. No spine.
Thirteenth to nineteenth caudals (vert. 39-45): Similar to those of Barnegat skeleton.
Twentieth caudal (vert. 46): Rudely triangular, with a peg-like posterior projection, bearing the very small posterior epiphysis. No foramina. Anterior epiphysis deeply concave in middle.
Charleston (female, jr.).—First caudal (vert. 28): Similar to last lumbar, but only a faint inferior median ridge. Inferior outline of centrum antero-posteriorly very concave, which is not the case in the Barnegat and Newport skeletons. Posterior chevron processes prominent. Postero-inferior oblique grooves shallow.
Seventh caudal (vert. 34): Like the Newport skeleton. The transverse process not pierced or emarginate. Postero-inferior oblique grooves indistinct. Ridges on centrum very distinct. Right anterior and posterior chevron processes united and pierced by a foramen.
Tenth caudal (vert. 37): Similar to the same vertebra in Newport skeleton, but neural spine very short.
CHEVRONS.
The number of chevrons in the North American and some other specimens is as follows:
| Newport, Rhode Island. | 11 |
| Barnegat City, New Jersey. | 8(+3?) |
| Charleston, South Carolina. | 8+ |
| Buenos Ayres, Argentina (Burmeister). | 11 |
| Holma, Sweden (Malm). | 9 |
| Littleton Harbor, New Zealand (Haast). | 10 |
| Warrington, New Zealand (Scott and Parker). | 9 |
| Pisa Museum (Van Beneden). | 9 |