XI. 



TELEOSAURIAN TEETH. 



185 



teeth, near the apex, which is usually blunt, even if not much worn. 

 Teeth of this pattern appear in different parts of the jaws, and 

 they agree with that of a teleosaurus from the oolite of Soleure 

 (Plate. VI. fig. 7. Ossem. Fossiles). They are less numerous than 

 in Teleosaurus Cadomensis, which, in the opinion of Cuvier, had 

 1 80 teeth. The Stonesfield and Enslow fossils had about 140. 



In fig. 2 we have a longer bicarinate tooth, the carinse prominent 

 near the apex, and then subsiding into a conspicuous divisional 

 stria, to which on either side other striae gather obliquely, as in 



JO 



Diagram XLII. Teeth of Teleosaurians. 



i. Teleosaurus brevidens, shewing a full-grown and also a young tooth in the 

 sockets ; striae stronger toward the point, finer toward the base. 2. A specimen, 



shewing the sharp keel near the apex ; figure curved. 3. Magnified view of the 

 striation on the side of the carina. 4. A long, narrow, much curved tooth. 



5. The striation textilinear. 6. T. subulidens, much curved ; very slender striae, 

 strong, few. 7. A smaller specimen. 8. The striation. 9. A straight tooth 

 (the section oval). The striation fine, flexuous, discontinuous. 10. A smaller 

 specimen. 



fig. 3. I regard this tooth as belonging to the same species as 

 fig. i, which I have named Teleosaurus brevidens. 



But the slender teeth marked 6 and 7, which are found in a 

 lower jaw of remarkable thinness in vertical measure must have 

 belonged to a smaller and more delicate animal. They are for the 

 most part firmly striated, and the striaa deviate but little toward 

 lateral lines (fig. 8), but some are smooth : their figure is awl- 

 shaped, making an approach to the teeth of the gavial, but have 

 little or no trace of the bicarination which is -conspicuous in that 



