PLATE XXIII^. 



Bones of Periptychus rhabdodon (except Fig. 12). Natural size. They belong to three individuals, those 

 represented on the preceding plate (Nos. 1 and 2), and a third, which I call No. 3. Figs, i and 4 

 belong to No. 2, and Fig. 2 belongs to No. 3; the remaining figures belong to No. 1. Page 391. 



Fig. 1. — Scapula, external view. 



Fig. 2. — Bones of foot; metapodiala and phalanges. 



Fig. 3. — Right femur from front; a, from behind; b, proximal view. 



Fig. 4. — Tibia lacking epiphysis and inferior extremity. 



Fig. 5. — Left calcaueum, internal view ; a, external ; b, anterior views. 



Fig. 6. — Left astragalus, internal view; a, external; 6, anterior; c, superior; and d, inferior views. 



Fig. 7. — Cuboid bone, .anterior view; a, internal view. 



Fig. 8. — Navicular, from below. 



Fig. 9. — Posterior metapodium without hallux; a, internal view. 



Fig. 10. — Phalanges from front. 



Fig. 11. — Phalanges with part of unguis from below; a, edge view. 



Fig. 12. — Right mandible of Periptj/chus ditrigonus external view ; a, superior view. Page 404. 



