260 
FOSSIL TURTLES 
SAURIANS. 
Of the Saurians, the bones and teeth of at least four 
genera have been discovered in the strata of Tilgate 
Forest; namely, the Crocodile, Plesiosaurus, 
Megalosaurus, and Iguanodon ; but hitherto no 
connected portions of their skeletons have come 
under our observation.* The teeth, both in form 
and structure, present such striking differences, as 
to be readily distinguished from each other, and 
from those of existing species ; but the bones pos- 
sess so many characters in common, that when we 
consider the broken and detached state in which 
they occur, and their intermixture with the debris 
of turtles, of vegetables, of fishes, and of shells, the 
difficulty of the attempt to identify the bones of the 
respective animals seems almost insurmountable 
to observers so distant from any collection of com- 
parative anatomy as ourselves. We therefore 
claim the indulgence of the reader, should the 
results of our investigations appear to be in some 
respects inconclusive and unsatisfactory ; since, 
under such circumstances, rigorous conclusions 
must not be expected. We shall first describe the 
teeth, and such of the bones, as are referable, with 
but little doubt, to one or other of the above-men- 
tioned genera ; and afterwards notice those osseous 
remains, which we are unable to appropriate with 
any degree of certainty or probability. 
* As it was considered advisable to print the memoir on the recently 
discovered fossit reptiles of the strata of Tilgate Forest without alter- 
ation, it became necessary to allow this portion of the text of the 
former work to remain, although some tautology is thereby incurred. 
