Pterosauria. 



PLATE 8. 



Vertebrse of Pterodactylus SedgwicMi and Pter. Fittoni. 



Fig. 

 1. 

 2. 



3. 



4. 



5. 



6. 



7. 



8. 



9. 

 10. 

 11. 

 12. 

 13. 

 14. 

 15. 

 16. 

 17. 

 18. 

 19. 

 20. 

 21. 

 22. 

 23. 

 24. 

 25. 

 26. 



Front view of anchylosed atlas and axis. 



Back view of the same. 



Side view of the same. 



Under view of the same : a, anterior tubercle, or rudiment of zygapophysis, of 



axis ; g, posterior zygapophysis, of axis ; c, centrum of atlas ; Pt infero- 



posterior processes of axis ; I, articular ball of axis. 

 Front view of a larger specimen of atlas and axis. 

 Under view of the same, indicative of a species distinct from fig. 4. 

 Side view ~i 

 Back view 

 Upper view 

 Front view 

 Under view 

 Under view 

 Side view 

 Upper view 

 Side view 

 Under view 

 Upper view 

 Under view 



Section of a large cervical vertebra. 

 Under view "] 



Front view [ of an anterior dorsal vertebra. 

 Side view > 



Front view of a lumbar vertebra. 

 Side view 

 Back view 

 Under view of three anchylosed sacral vertebrse. 



of a middle cervical vertebra. 



I of a cervical vertebra. 



I of a cervical vertebra. 



1 of a more complete cervical vertebra. 



of a dorsal vertebra. 



All the figures are of the natural size, and from specimens in the Woodwardian 

 Museum of the University of Cambridge, which were found in the Upper 

 Green-sand (Neocomian) near that town. 



