TILGATE FOREST. 
ns 
and generally occur in the state of casts and im- 
pressions ; their generic characters are, therefore, 
seldom sufficiently manifest to afford any positive 
conclusions. Those we have noticed appear to be- 
long to the following genera : — Neretina, paludina, 
melanopsis, unio*, psammobia, cyclas, &c. 
Remains of fishes. — Teeth, scales, and bones of 
some species allied to lepisosteus, siluri, &c. 
Turtles. — Three kinds: the first resembling a 
freshwater, the second approaching to a terrestrial, 
and the third to a marine species. The bones, 
and detached parts of the sternum and buckler, 
are very abundant in the calciferous grit, as well 
as in the sand, and clay. 
Saurian animals. — The bones, teeth, scales, &c., 
of four (if not more) gigantic animals, of the 
saurian order, viz. : — 
Jguanoclon. — The teeth, and many enormous 
bones : these remains have not been found in any 
other deposit, nor in any other country. 
Megalosaurus The teeth, vertebrae, ribs, and 
some of the bones of the extremities : the only 
other known locality is the slate of Stonesfield. 
Crocodile The teeth, vertebrae, ribs, and other 
bones of a species allied to the Gavial, or Gangetic 
crocodile ; and of three or more species. 
Plesiosaurus : — teeth ; caudal, lumbar, dorsal, 
and cervical vertebrae, of the long-necked species. 
Birds : — bones of some species of Ardea. 
* Casts of shells of these genera sometimes form the entire mass of 
the layers of sandstone; and it is worthy of remark, that they occur 
also in the shale and grit of the coal measures, and in the ironstone of 
Derbyshire. 
