218 



PROCEEDINGS 



OF 



THE GEOLOGICAL SOCIETY. 



POSTPONED PAPEE. 



On DAKOSATJErs from the Ximmeeidge Clat of Shototee Hill. 

 By J. Wood Masoi^, Esq., E.G.S. 



(Eead Not. 25, 1868*.) 



Eaely in the spring of 1866 I obtained from the Kimmeridge Clay 

 of Shotover-hill, near Oxford, four entire teeth and one portion of a 

 tooth of Dakosatirus, which is now for the first time described and 

 figured as a British genus. 



The only description of this reptile with which I am acquainted 

 is to be found in Quenstedt's ' Ber Juraf.' This author, after men- 

 tioning the circumstance of his having described it in a former work 

 under the name of MegalosauruSy states that the only part of the 

 skeleton known is a portion of a lower jaw containing six t^eth, 

 which are implanted in distinct sockets (Alveolen): a detached tooth, 

 figured in the work referred to, well expresses the general characters 

 given below, even to the crenulation of the trenchant margins. 



Fig. 1. 



Fig. 2. 



Posterior view of largest tooth 

 of Dakosaurus. 



a. Anterior view of tooth 



of Dakosaurus. 



b. Portion of ridge of same, 



highly magnified to 

 show crenulation. 



* For the discussion on this paper see p. 16 of the present volume. 

 t P. 785, Atlas, tab. 97. fig. 11. 



