TAB. XVIII. 

 Cervical Vertebra of Plesiosaurus Bemardi, nat. size. 



Fig. 



1 . Front view. 



2. Back view of spinous process. 



3. Side view. 



4. Under view. 



From tlie Upper Chalk of Sussex. In the Collection of the late Fred. Dixon, Esq., 

 F.G.S., of Worthing. 



