PLATE XV. Fig. 1. Ornithomimus altus, Lambe, caudal vertebra, superior view, natural size. Page 52. Fig. 2. View of right side of same. Fig. 3. Ornithomimus altus, caudal vertebra, superior view natural size. Page 52. Fig. LL. The same, inferior view. Fig. 5. The same, right side. Fig (S. Ornithomimus altus, left sidc of lumhar vertebra of small individual natural size. Fig. 7. The same, superior view. Fig. S. The same, anterior view. Fig. Ü. Terminal phalanx of megalosauroid dinosaur, lateral view; natural size. Fig. 10. The same, proximal view. z, prezygapophysis i, postzygapoplıysis; s, neural spine e, transverse process. Fig, ll. Tooth of Deinorloıı cnrplanatus', Cope, side view; four times the natural size. Page 45). Fig. 12. Transverse section of the same. Fig. 13. Ptilodus primaevus, Lambe, right man libular rztmus,c.\' ternal view; enlarged four times. Page 79. Fig. 1 -1. The same, internal view. pflf, fourtli prernolar; mf, first molar i, socket for incisor; n, socket for second molar. Fig. 15. Boreodon matutinus, Lambe, premolar. side view, four times natural size. Page TQ c, cingulum. Fig. 16. Right maxillary bone, (provisionally associated with Scapherpelnu tectmn), external view, four times thc natural size. Fig. ii. Inferior' view of the samc, similarly cnlargcd. Page 32. Fig. is. Prcınaxillary bone of Diphyodus longirostris, Lambe, inferior view; enlarged four times. Page 30. Fig. 19. Transverse section of samc, similarly enlarged. t, tooth-base m, interspace.