PLATE XLIX. 



Figs. 1-3. — Metalophodon armatus ; dentition, natural size. Page 555. 



Fig. 1. — Molar teeth of upper jaw. 



Fig. 2. — Incisor teeth of the upper jaw (one of the incisors possibly of the lower). 



Fig. 3. — Crowns of permanent teeth of the upper jaw, from a young animal. 



Fig. 4. — Superior canine tooth, lacking the middle of the crown; a, inner side; i, transverse section. 



Fig. 5. — Inferior premolars of No. 1, or No. 3. 



Fig. C. — Inferior true molar of No. 3. 



Fig. 7. ^Inferior canine of No. 1, or No. 3. 



Fig. 8. — Cuneiform bone of ? Bathmodon ; a, sujjerior side. 



Fig. 9. — Superior view of cranium of Limnohyus fontinalis Cope ; one-half uatural size. Page 707. 



