188 M. Von Sommcrhig on the [Sept. 



complete resemblance to those of the animals discovered at 

 Maestricht and Vicenza. 



Of such teeth, there are seven on the right side, in the upper 

 jaw belonging to our animal ; and at least fourteen on the left side. 

 In the under jaw, there are only five on the right and six on the 

 left ; these too are not all in equally good preservation, some of 

 them being broken. 



There being the evident remains of three teeth in the little 

 fragment marked fig. 3, which, in all probability, belonged to 

 the left side of the upper jaw, we may reasonably conjecture that 

 the animal had certainly more than 17 teeth in this jaw. 



The teeth appear smaller in front than in the intermediate 

 parts from whence again they gradually decrease as they pro- 

 ceed towards the extremities, so that the most backward teeth 

 are less than any of the others. 



Besides the two fragments belonging to the head ; namely, the 

 larger one in fig. 1 and 2, and the lesser represented in fig. 3, 

 there is another of a middling size, which apparently belongs to 

 the palate, but could not be engraved on account of its indis- 

 tinctness and imperfect state. 



The right side portion of the under jaw of the Maestricht 

 animal, as given by Faujas St. Fond (PI. L), which is apparently 

 very perfect, exhibits 14 teeth nearly regularly increasing in size 

 as they recede from the front, so that the foremost teeth are the 

 smallest, and the hindermost the largest. Judging not only 

 from this, but even from the 14 teeth in the left side of the upper 

 jaw belonging to our fragment, more than half of the under jaw 

 is wanting in our fragment. 



The palate teeth which are to be seen in the Maestricht animal, 

 and which arc so important towards characterizing the animal, 

 appear either to be wanting, as do likewise the bones of the 

 palate, or to be still buried up among the rubbish that could not 

 easily be removed. 



Vertebra. 



Nineteen of the vertebrae are very evident, fig. 8 and 10, and 

 of two others, fig. 8, there are perceptible traces or im- 

 pressions. 



Eight of these vertebra?, fig. 8, part of which belong to the 

 back, and part to the loins, appear, notwithstanding their distor- 

 tion, to be arranged as they were in the living animal. Their 

 lateral processes, which are of considerable size, are very distin- 

 guishable. 



The ninth of these, fig. 9, as likewise the two of which only 

 the traces are perceptible (p p), appear to belong to the loins and 

 pelvis, as. do the other three, marked q q q, to the tail, both on 

 account of their situation (behind the bones of the pelvis, and 

 below those of the thigh), and of their flat form. 



Five other vertebra? found in a separate mass of stone seem 

 to have belonged to the foremost part of the backbone. Yet as 



