FOSSIL REPTILES. 331 



in which it was, presented also the remains of a very small 

 fish, and some small asteriae. Like all those schists it is of a 

 greyish red. The bones are distinguished by a browner tint. 

 Their cavities are filled with a whitish spath. 



The individual is one third smaller in the trunk than the 

 preceding, and its head and neck much less elongated in pro- 

 portion. Its head is by no means so well preserved, and, seen 

 in an isolated state, it might more readily be taken for that of 

 a bird than a reptile. 



There are no teeth marked in the figures of it. But M. de 

 Soemmering says, that there were some small ones in the two 

 jaws, some of which resembled the front teeth of the bats, 

 others, their molars, and that, on the opposite stone, there 

 were eight pointed ones in the lower jaw, and in the upper 

 five. M. Oken does not mention the teeth, but thinks that 

 he could distinguish a tympanic bone. 



There were seven vertebrae in the neck, to the last three or 

 four of which M. de Soemmering has marked spinous apo- 

 physes. There are ten or eleven vertebrae between the cervical 

 and the sacral, all provided with spinous apophyses, not much 

 raised, cut square, and which all appear to have carried ribs. 

 These last are slender and simple, as in the other species. 



The tail is also short, slender, and pointed, but it is not 

 easy to reckon the vertebrae. It would seem that the last 

 are divided into two parts. The pelvis is exactly that of a 

 lizard. The arm is the same as in the large species. 



The three small unguiculated toes show distinctly the same 

 number of phalanges as in the large species, and in the lizards. 

 The long toe has the same proportion as in the large species, 

 and is composed in the same manner of four articulations, the 

 last of which has no claw. The hind feet were composed each 

 of four toes, with a metatarsus with four bones, like the large 

 species. 



These details, and more that we have omitted through fear 

 of tediousness, prove that in this district, at the epoch when 



