112 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.50. 



EXPLANATION OF PLATES. 



Plate 26. 



Fig. 1. Elephas imperator. Hiadermost left lower molar. X f. 



2. 3. Trichechus antiquusf Lower jaw. X i- 



2. View of left side. 



3. View from above. 



4. Atractosteus lapidosus . Right opercular bone; outer surface. XI. 



5. Atractosteus tristoechus. Left opercular bone; outer surface. Reduced. 



Plate 27. 



Figs. 1. 2. Thinohadistes segnis. Left astragalus. X I- 



1. View of upper face. 



2. View of lower face. 



3. 4. Gnathopsis oweni. Left astragalus. X J. 



3. View of upper face. 



4. View of lower face. 



a, external; 6, internal, portion of tibial articular surface; c, articular 

 surface for navicular; d, articular surface for cuboid; e, anterior; 

 /, posterior surface for calcaneum; g, articular surface for fibula. 



Plate 28. 



Figs. 1-3. Trucifelis fioridanus. Teeth. X 1. 



1. Left upper carnassial. Inner view. 



2. Same tooth. Outer view. 



3. Fragment of upper canine. 



4. Dinobastis series. Right canine. X 1. 

 5-7. Felis veronis. Left upper carnassial. X 1. 



5. Outer view. 



6. Inner view. 



7. View of cutting border. 



8. Atractosteus lapidosus. Scales. X 1. 



9. Atractosteus tristoechus. Scales. X 1. 



