| Skull | 0.630 | meters. |
| Neck | 0.360 | |
| Trunk, (thirty-three vertebrae preserved) | 2.370 |
A very complete specimen of a Liodon in the Museum, in which the complete vertebral column is present, numbering one hundred and seventeen vertebrae, gives the following measurements. The skull is complete, save the most anterior portion.
| Skull (approximated within narrow limits) | 0.700 | meters. | |
| Neck | 0.430 | ||
| Trunk | 1.760 | ||
| Tail | 3.420 | ||
| Total | 6.310 | 20 ft. 8 in. |
The vertebral series in this specimen is composed of seven cervicals, twenty-three dorsals, seven pygials, and eighty chevron-caudals.
The relative proportions of the different regions in the two genera, as shown by the two specimens of Clidastes and Liodon, may be represented as follows. The first column is for Clidastes.
| Skull | 12.1 | 11.1 |
| Neck | 6.5 | 6.8 |
| Trunk | 39.2 | 28.0 |
| Tail | 42.3 | 54.1 |
Limbs.
The figures in plates II and III will give a sufficiently good idea of the limbs in this specimen. They are figured as they were lying, showing the outer sides of the coracoid, scapula and pelvic bones, and the palmar or plantar surface of the remaining bones.
Coracoid.
It will be observed in plates II and IV that there are two very different types of coracoid, one with a deep emargination, the other without the slightest indication of such. The same non-emarginate form occurs in C. tortor, as specimens in our Museum show, in C. propython Cope (Ext. Batr. etc. pl. xii, f. 16,) and in C. dispar, as figured by Marsh[7], and as stated by him in the same paper (“There is certainly no emargination in the coracoid of Clidastes, Edestosaurus and Baptosaurus, as specimens in the Yale Museum conclusively prove.”) It is true that Marsh in a later paper[8] figured a specimen with emarginate coracoid under the name of Edestosaurus dispar, but it is certain that his identification of his own species was wrong, as will be seen by comparing his figures. From the senior author’s memory of the specimen with the emarginate coracoid figured, and from the figure itself he feels confident that the second specimen is C. velox.