146 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.58. 



Plate 9. 



IfiGS. 1-7. — Elephus primigenius X 1. 



1. View of grinding surfaces of third and fourtli milk molars. 



2. Lower right second milk molar, presenting the grinding surface. 



3. Upper left third milk molar, seen from behind. 



4. Same tooth, showing grinding surface. 



5. Right maxilla, showing the grinding surfaces. 



6. Same object, with second and third milk molars, seen from without. 



7. Lower second milk molar, showing a polished section. 

 Figs. 8-9. — Alisodon mirus. Pharyngeal bone. X 2. Type. 



8. View showing grinding surfaces of the teeth. 



9. View of outer aspect of bone and teeth. 



Plate 10. 



Fig. 1. — Terrapene hulverda? Left xiphiplastral bone, showing upper surface. 



X 1. 

 Fig. 2. — Crotalus atrox? Side view of one vertebra. X 1. 

 Figs. 3-7. — Elephas primigenius? Young animals. 



3. Lower left third milk molar from Temple, Texas. View of inner face. 



X 1. 



4. Same tooth. View of outer face. 



5. Basisphenoid seen from the left side. X *. 



6. Left exoccipital, showing inner surface. X i. 



7. Left tibia, lacking the epiphyses. X .35. 



Fig. 8. — Mamtnut americanum. Tibia of young animal, lacking the epiphyses. 

 X .35. 



Plate 11. 



Figs. 1-6. — Elephas primigenius. Teeth. 



1. Left upper third milk molar, showing outer face and part of anterior 



root. X 1. 



2. Same tooth, seen from below, to show bases of roots. X f . 



3. Left lower third milk molar, seen from without. X 1. 



4. Same tooth from below, to show bases of the roots. X f. 



5. Maxilla with third milk molar and part of the fourth. View from 



within, X i. 



6. Part of an upper third milk molar, with its coat of cement. X 1. 



