TAB. XXVIII. 



Fig. 



1. Side view of the end of the upper jaw of Pterodaciylus Cuvieri, nat. size; 



a, a, the alveoli. 



2. Outline of the section at the hinder fractured part. 



3. Anterior end of the jaw. 



4. Palatal surface of the jaw. 



5. The crown of one of the teeth of the same jaw. 



6. The crown of another tooth of the same jaw. 



7. Magnified view of a portion of the crown of a tooth of the same jaw. 



8. Left side of two portions of the upper jaw of Pterodactylus compressirostris, nat. 



size ; a, a, alveoli. 



9. Right side of the same two portions of jaw. 



9*. Transverse section of the jaw at the fore part of the hinder fragment. 



10. Palatal surface of the same two portions of jaw ; p, the naso-palatine aperture. 



Both the foregoing specimens are from the Burham Chalk-pit, Kent ; and are 

 in the Cabinet of James S. Bow T erbank, Esq., F.R.S. 



