| Case. | Comp. | Series. | Specimen. |
| J | c2 | 13 | 1 |
Ornithocheirus oxyrhinus (Seeley).
This well-marked species is a portion of a premaxillary bone 11/4 inch long, fractured behind and in front. The palate is half an inch wide; its two halves are inclined to each other at a considerable angle, and where they meet form a more prominent keel. The tooth-sockets look more outward than downward, are nearly circular, separated by interspaces as long as the sockets; three sockets and two interspaces measure one inch. The jaw is about 5/8ths of an inch high in front, and about 1/16th of an inch higher behind. The sides are flat and converge like the sides of a wedge to a sharp rostral keel.
IX.
Ornithocheirus xyphorhynchus (Seeley).
I have seen but one example of this form. It has lost much of the outer layer of bone, and shows on the sides impressions like tooth-marks from an eater of Pterodactyles. A groove which has some appearance of being due to fracture traverses each side, but the specimen is symmetrical, and has its characters in no way changed by the accident.
It is a portion of a lower jaw of a long-beaked Pterodactyle of the O. Sedgwicki type, with parallel sides, and the rounded basal ridge nearly parallel with the palate.
The fragment is two inches long, showing four large and obliquely set sockets in If inch. The tooth-sockets are on the outer two-thirds of the palate, and looked forward, upward, and outward The interspaces each measure 5/16ths of an inch.
Each half of the palatal surface which is 5/16 of an inch wide, inclines to the other half at a right angle, being parted by a narrow groove; the diameter of the jaw is half an inch.
The depth of the jaw is 5/8ths of an inch in front, and 3/4ths of an inch behind. The sides are flat and approximate below to a sharp keel. This species is one of many in the collection of W. Reed, Esq. of York, kindly placed in my hands for the elucidation of those in the Woodwardian Museum.