Page:Quarterly Journal of the Geological Society of London, vol. 25.djvu/520



Measurements of vertebrae.

Height from lower border of centrum to end of neural spine

Centrum. Posterior articular face. Breadth. Height.

Anterior articular face. Breadth. Height. Length.

Transverse horizontal diameter midway between neurap. suture and inf. median line.

Neurapophysis. Length. Thickness.

Diapophysis. Length. Breadth at root. Thickness of ant. margin. " post. margin.

In British Museum.

No. 1. in block with ramus of lower jaw.

No. 2. In same block.

No. 3. In block with symphysis of upper jaw.

No. 4. Arch with processes and spine, centrum wanting.

No. 5. In block with anterior extremity of lower jaw.

No. 6. Do., lent me by Mr. Mansel.

Ribs. — Imbedded in the same blocks of stone with the vertebrae and jaws are fragments of several ribs. The longest of these, 12 inches long, lies across the outer surface of the lower jaw. For 10 inches it is cylindrical ; and it has an average diameter of .8 inch. Its distal end is flattened ; the flatness may have been slightly increased by squeezing, as the texture of the bone shows here signs of crushing. Its vertebral end is forked, and some of the other fragments are also distinctly bifurcated ; but in none are the actual articular surfaces preserved.

Limb-bones. — The only limb-bone which I can identify is a long bone, the distal half of which is seen lying across the lower jaw. Its proximal half has been exposed in the reverse side of another block, so that, very unfortunately, the entire bone cannot be viewed at once. The broken ends, however, fit accurately, and there cannot be the slightest doubt of the original continuity of the two pieces. This bone agrees more closely with the femur of the living crocodile than with the humerus of this latter ; and on this ground I believe it to he the femur, the left one. In its present state it is 14 inches long. The proximal end is expanded transversely, and it measures 3 inches across. Its under surface bears a subhemi-