TAB. X. 



Fig. 



1. Mutilated head and vertebrae of the fore-part of the trunk of Dolichosaurus 



longicollis. 



2. OutUne of part of the lower jaw. 



3. The same, magnified. 



4. Vertebrae of the hind part of the trunk and pelvis of Dolichosaurus longicollis. 



From the Middle Chalk, Kent. Fig. 1, in the Collection of Mrs. Smith, of 

 Tonbridge Wells. Fig. 2, in that of Sir Philip de Malpas Grey Egerton, 

 Bart., F.R.S., M.P. 



5. Portion of the lower jaw of Raphiosaurus subulidens. 



6. Upper or alveolar surface of ditto. 



From the Lower Chalk of Cambridgeshire. In the Collection of James Carter, 

 Esq., of Cambridge. 



7. Portion of the lower jaw, with a tooth in situ, of Polyptychodon interruptus. 



From the Chalk of Kent. In the Collection of Mrs. Smith, of Tonbridge Wells. 



8. Crown of the tooth of Poli/ptychodon interruptus. 



9. Crown of the tooth of ditto. 



From the Green-sand of Cambridgeshire. In the Collection of James Carter, Esq. 



All the figures, save fig. 3, are of the natural size. 



