TAB. II. 



Plesiosaurus planus, nat. size. 



Fig. 



1. Front view of centrum of posterior cervical vertebra. 



2. Upper view of ditto. 



3. Front view of centrum of posterior cervical vertebra of a larger individual. 



4. Upper view of ditto. 



5. Side view of ditto. 



6. Front view of centrum of posterior cervical vertebra of a larger individual. 



7. Under view of ditto. 



8. Side view of ditto. 



9. Upper view of ditto. 



From the Upper Green-sand near Cambridge. In the Woodwardian and 

 British Museums. 



