Lumbar region—Last lumbar ([Plate VI.], Figs. 4 and 5).
| M. | |
| Diameter of centrum (fore-and-aft) | ·095 |
| Diameter of posterior face (transverse) | ·111 |
| Diameter of posterior face (vertical) | ·078 |
| Extreme width between transverse processes | ·214 |
| Width between pre-zygapophyses | ·110 |
| Length of neural spine from lamina | ·060 |
| Vertical length from tip of spine to lower side of centrum | ·194 |
Sacral region.
| M. | |
| Length of sacral series | ·264 |
| Transverse extent of sacral series | ·298 |
| Diameter of first vertebra at free end (transverse) | ·109 |
| Diameter of first vertebra at free end (vertical) | ·072 |
| Diameter of first vertebra at free end (tore and aft) | ·070 |
| Diameter of last vertebra at free end (transverse) | ·053 |
| Diameter of last vertebra at free end (vertical) | ·031 |
| Diameter of neural canal at first vertebra (transverse) | ·100 |
| Diameter of neural canal at last vertebra (vertical) | ·018 |
| Long diameter of first transverse foramen (internal side) | ·076 |
Caudal region (Fig. 6, [Plate VI.]).
| M. | |
| Length of first four | ·252 |
| Diameter of centrum, first (fore-and-aft) | ·061 |
| Diameter of neural canal of first (transverse) | ·035 |
| Extent of transverse process in first | ·085 |
| Extent of transverse process in fourth | ·046 |
| Fore-and-aft width of transverse process of first in the middle | ·048 |
Ribs.—Description based upon two perfect ones, and parts of four more.
The ribs, as in Dinoceras, "resemble very much those of the Mastodon." The capitulum has two convex facets, separated by a narrow groove. The sternal end in one is very much expanded, but less so in the other. The tubercle is small, and is situated upon the prolongation of the lamelliform process for the intercostal muscles. The angle is much sharper than in the corresponding ribs of Mastodon.
Measurements of Ribs.