72 MESSES. HANCOCK AND ATTHEY ON 



The teeth exhibit very distinctly on the upper portion or crown 

 the wide, compressed, sharp cutting edges, and on the base the 

 strong fluting or grooves. In several, the points are quite per- 

 fect, and are decidedly lancet-shaped. The teeth are anchyloi;^d 

 to the bottoms of shallow pits in the not by any means deep al- 

 veolar groove. 



In one of the fragments there are seven teeth ; in the other, 

 four perfect and three imperfect. In the latter the anterior tooth 

 is a little more than half-an-inch long, and the others gradually 

 diminish in size backwards, and are placed considerably apart 

 from each other, the spaces between them being nearly fths of 

 an inch wide. In the other fragment the four most perfect teeth 

 appear to be situated at the posterior extremity of the alveolar 

 groove, though the jaw is continued for a considerable distance 

 behind them. The anterior of these four is not quite half-an- 

 inch long, and the others diminish gradually in size posteriorly, 

 the last being not much more than half that length ; but its ex- 

 tremity is not quite perfect. The three imperfect anterior teeth 

 are very much larger than the four posterior ones; the largest of 

 them, which is the centre one, cannot have been less than an 

 inch in length, and fths of an inch wide at the base. They are 

 all placed considerably apart from each other ; but they are not 

 quite so widely separated as those in the other fragment. 



We have two other fragments of jawbones of this reptile ; but 

 they are in such an unsatisfactory condition that not much can 

 be said about them. One of them, however, is probably a max- 

 illary bone ; it is 6^ inches long, and 1^ inches wide ; but it is 

 so imperfect that its form is not determinable, and it is much 

 encumbered with other bones. A portion of the alveolar border 

 is nevertheless distinctly displayed, with five close set teeth, the 

 largest of which is upwards of half-an-inch long. Other frag- 

 ments of teeth are scattered about. We have also a confused 

 mass of apparently cranial bones, which show the peculiar sur- 

 face sculpture. A portion of a jaw with a tooth or two is mixed 

 up with these fragments. 



For some time these portions of mandibles were all supposed 

 to belong to Bhizodnx lanceiforims, Newberry, as the teeth 



