| M. | |
| Length of rami (straight) | ·618 |
| Width of lower jaw outside of glenoid cavities | ·316 |
| Length of symphysis | ·110 |
| Width of jaw at second enlargement | ·057 |
| Depth at oval foramen | ·073 |
| Greatest width at symphysis | ·110 |
| Space occupied by teeth | ·340 |
| Breadth of glenoid cavity | ·072 |
| Length of post-glenoid | ·065 |
Vertebræ.
Cervicals.—The centra are long and nearly cylindrical, expanding slightly near the anterior face. The hypapophyses are short and broad; they project forwards, and are somewhat compressed. The vascular foramina correspond in size and position to those of the alligator. The neural canal is small and subcircular, having comparatively short but very stout neurapophyses, which are perforated behind the diapophyses. These are short and stout, and are developed from the neurapophyses alone. The zygapophyses are long and flat; the anterior ones project almost vertically. The neural spines are stout, and of greater antero-posterior extent than in the alligator.
Dorsals.—A few of the anterior dorsals have strong hypapophyses. The centra of all are long and stout. The neural canal is smaller than in the cervical region; it has strong neurapophyses, which develop long and depressed diapophyses. The neural spines are low and broad. The zygapophyses are developed on the laminæ, and do not project upwards as in the cervical region.
The lumbars are much like the dorsals, except that they are longer, and have very large and depressed diapophyses, which project somewhat upwards.
Measurements.
| M. | |
| Length of centrum of a posterior cervical | ·049 |
| Height of neural canal | ·015 |
| Fore-and-aft diameter of neural spine | ·023 |
| Length of diapophysis | ·023 |
Dorsal.
| M. | |
| Length of centrum | ·0555 |
| Length of hypapophysis | ·018 |
| Fore-and-aft diameter of neural spine | ·030 |
Lumbar.