XIII. 



TEETH OF SAURIANS. 



389 



DAKOSAURUS. 



This title,, given by Quenstedt to some teeth of the upper Jurassic 

 series, has been applied by Mr. J. W. Mason to specimens found in 

 the clay of Shotover. The distinctness of these teeth from others 

 which have been ascribed to steneosaurus is doubtful. 



Diagram CXCI. Dakosaurus. 



Conical slightly-arched tooth with carinated and crenulated edges (b), and a finely- 

 wrinkled surface (a). Across the tooth run some faint dark bands. This corresponds 

 to Dakosaurus maximus of Quenstedt (Jura, Plate XCVII. fig. n). 



These teeth appear to be closely allied to those of steneosaurus. The crenulation 

 is seldom so regular as represented in 6. 



There is a different set of teeth which seem more allied to megalo- 

 saurus, being very compressed, with a faintly striated surface, but 

 without any observed crenulation on the edges. They correspond 

 with others called dakosaurus by Quenstedt (Jura, Plate XCVII. 

 figs. 9, 10). 



Diagram CXCII. Reptilian teeth, from the Kimmeridge clay of Shotover. 



The left-band figure shews the broad outer surface, and at a the raised and 

 undulated striae ; the right-hand figure shews the same edgeways. 



