TAB. XVIII. 

 Cervical Vertebra of Plesiosaurus Bernardi, nat. size. 



Fig. 



1. Front view. 



2. Back view of spinous process. 



3. Side view. 



4. Under view. 



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

 F.G.S., of Worthing. 



