TAB. I. 

 Skull of Chelone breviceps, nat. size. 



Fig. 



1 . Side view. 



2. Top view. 



3. Base view. 



4. Back view. 



The following numerals indicate the same bones in each figure. 



1. Basioccipital. 



2. Exoccipital. 



3. Supraoccipital. 



4. Paroccipital. 



5. Basisphenoid. 



7. Parietal. 



8. Mastoid. 



11. Frontal. 



12. Postfrontal. 



14. Prefrontal (with connate Nasal and Lachrymal) . 

 21. Maxillary. 



26. Malar. 



27. Squamosal. 



28. Tympanic. 



29. Articular. 



29. Surangular. 



30. Angular. 

 32. Dentary. 



