ROOM III. POLYPTYCHODON. 201 



large, conical, ridged teeth, and these detached bones, may 

 probably appertain to the same genus or species of aquatic 

 saurians. 



In a subsequent section we shall enter upon the most in- 

 teresting department of our present subject, the history of 

 those gigantic terrestrial saurians whose remains have been 

 chiefly obtained from the strata of the south-east of England, 

 and of which this division of the Gallery contains an interest- 

 ing series. 





