144 PROCEEDINGS OP THE NATIONAL MUSEUM. vol.58. 



Fig. 16. — Elephas primigenius. Rear of penultimate milk molar. X 1. 

 Figs. 17-20.— C/rstts floridanus. Teeth. X 1. 



17. Lower right first molar. 



18. Lower left first molar, 



19. Upper left third molar. 



20. Upper left third molar. 



Figs. 21-23. — Platygonus setiger, new species. Lower canine. X 1. Type. 



21. Side view. 



22. Section at base of crown. 



23. View of hinder face. 



Plate 4. 



Fig. 1. — Equus giganteus? Upper left second premolar. "View of grinding 



surface. X 1. 

 Figs. 2, 8. — Mylohyus nasntus. Two lower left canines. X 1. 



2. Presenting outer face. 



3. Presenting inner face. 



Figs. 4-13. — Mylohyus exorUvus. Teeth. X 1. 



4. Lower left molars. 



5. Lower left third premolar. 



6. Lower left first molar, unworn. 



7. Lower left second molar, unworn. 



8. Upper right second, third, and fourth premolars. 



9. Upper right premolars, fourth. 



10. Upper left fourth premolar. 



11. Upper left first molar, worn. 



12. Upper right second molar, unworn. 



13. Upper right second premolar. 



Figs. 14, 15. — Mylohyus ohtusidens. Upper and lower canines. X 1. 



14. Upper canine, showing inner face. 



15. Lower left canine, showing inner face. 

 Figs. 16, 17. — Platygonus tetragonus? Right canine. 



16. View of inner face. X 1. 



17. Cross section at lower fracture. X 2. 

 Figs. 18. 19.— Platygonus rctusf Teeth. X 1. 



18. Lower left first and second molars. 



19. Section of lower canine. 



Fig. 20. — Sciurus tenuidens. Upper incisor. X 1, Type. 

 Figs. 21, 22. — Smilodontopsis moorehcadi. Upper right sectorial tooth. X 1. 

 Type. 



21. View of lingual (inner) surface. 



22. View of cutting surface. 



Fig. 23. — Same species? as figures 21, 22. X 1. Left upper canine. 

 Figs. 24r-26. — Aenocyon ayersi? Teeth. X 1. 



24. Upper right third premolnr, inner face. 



25. Upper right second premolar, outer face. 



26. Upper left third premolar, outer face. 



Plate 5. 



Figs. 1, 2. — ?Dinobastis scrus. Ungual phalange. X 1. 



1. Side view. 



2. View of rear. 



Figs. 3.4. — Aenocyon dirus? Canine tooth. X 1. 



3. View of lingual face. 



4. View of median face. 



