TAB. IJ 



Vertebrae of Pterodactylus Sedgwickii and Fter. Fittoni. 



Fig. 



1 . Front view of anchylosed atlas and axis. 



2. Back view of the same. 



3. Side view of the same. 



4. Under view of the same : «, anterior tubercle, or rudiment of zygapophysis, of 



axis ; z, posterior zygapophysis, of axis ; c, centrum of atlas ; p, infero- 

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



5. Front view of a larger specimen of atlas and axis. 



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



7. Side view ^ 



8. Back view | 



9. Upper view J- of a middle cervical vertebra. 



10. Front view 



1 1 . Under view J 



12. Under view 1 , . , . 



, „ „. , . !• of a cervical vertebra. 



13. Side view J 



14. Upper view "i 



15. Side view >^ of a cervical vertebra. 



16. Under view j 



^^ , I of a more complete cervical vertebra. 



18. Under view J 



19. Section of a large cervical vertebra. 



20. Under view ^ 



21. Front view j^ of an anterior dorsal vertebra. 



22. Side view > 



23. Front view of a lumbar vertebra. 



24. Side view 



^_ „ , . , of a dorsal vertebra. 



25. Back view J 



26. Under view of three anchylosed sacral vertebrae. 



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. 



