LABYEINTHODONTIA. 



211 



have left impressions of the size of those in the Cheshire 

 sandstones, described and figured by Egerton as of the Gheiro- 

 therium Hercules. A lower jaw has been found in the " New 

 Bed" of " Guy's Cliff," Warwickshire : a tooth of the natural 

 size is represented in fig. 86. 



Fig. 87. 

 Transverse section of a tooth of the Labyrinthodon (magn.) 



The Labyrinthodon leptognathus is known by fragments of 

 the upper and lower jaws, two vertebrse, and a sternum. They 

 were found in the new red sandstone quarries at Coton End near 

 Warwick. The vertebra has deep articular cavities at both ex- 

 tremities of the body ; the neural arch is anchylosed with the 

 centrum. From each side of its base a thick and strong 

 transverse process extends obliquely outwards and upwards. 



The sternal bone consists of a body, which gradually 

 thickens to the fore or upper end, where cross pieces are 

 given off at right angles to the stem, each with a groove 

 for the articulation of clavicles. 



