PLATE III. Fig. 1 in New genera and species from the Belly River Series (mid-Cretaceous)

PLATE III. Fig. 1. Trachodon (Pteropelyx) marginatus, Lambe, inner side of left ramus of lower jaw, showing the teeth; one-half the natural size. Page 73. e, coronoid process; a, symphyseal surface; b, inner wall of dental chamber; c, mandibular groove; d, foramen. Fig. 2. Trachodon (Pteropelyx) sclwyni, Lambe, inner surface of teeth of lower jaw, to show succession natural size. Page 69. Fig. 3. Grinding surface of teeth of same specimen; natural size. Fig. 4. Scapherpeton tectum, Cope, dorsal vertebra, from the left side; twice the natural size. Page 31. Fig. 5. View from the front, same specimen. Fig. 6. Scapherpeton tectum, atlas, front view; twice the natural size. Fig. 7. The same, viewed from behind. Fig. 8. The samc, side view from the lcft. y, diapophysis _; z, prezygapophysis; ê, postzygapophysís l; s, neural spine 5 x, anterior articural cup; w, neural canal; v, facet for occipital condyle of skull.