PLATE XII.

Facial Bones and Lower Jaw.

Fig. 1. Side view of the dentary bone of Ornithocheirus machærorhynchus, showing its posterior attenuation towards the palate. J.c6.33.1, p. 113.

2. Superior aspect of the same specimen, showing the palatal groove and tooth sockets.

3. Articular end of left ramus of mandible, J.4, showing its posterior termination, p. 91.

4. Articular end of left ramus of mandible, J.c6.32. 2, fractured through the articulation.

5. Side view of anterior part of dentary bone of Ornithocheirus Cuvieri ? J.c.15, p. 113.

6. Side view of anterior part of premaxillary bone of Ornithocheirus microdon, fractured at both ends. J.c.29, p. 116.