FOSSILS OF THE WEALDEN. 
231 
between Langton and Groombridge, afforded to our 
researches paludince^ vertebrae, teeth of crocodiles, 
and scales of fishes. 
It would be tedious to enumerate all the localities 
from which the fossils of the Wealden have been 
collected, for although the strahi in certain parts of 
the country are richer than in others, yet there is 
no spot so barren, from which industry and well 
directed research may not succeed in extracting 
objects of interest. 
Organic Bemains. — The fossils of the inferior 
grou}) of strata of the Wealden agree in their 
general characters, with those of the middle and 
upper divisions ; the only essential difference ap- 
pears to be, that in the Ashburnham limestone, and 
tlie shales and clay beneath, bivalves predominate ; 
and that the remains of saurian reptiles are less 
abundant than in the superior deposits. There is 
no paludina limestone in this gi'oup that could be 
taken for the marble of the Weald clay ; nor does 
the latter contain, in any of its calcareous beds, 
such an abundance of cyclade.s and other bivalves, 
as to form a limestone resembling that of Ash- 
' burnham. 
We shall now proceed to describe the organic 
remains of the Wealden, and those of tlie strata of 
Tilgate Forest in particular ; the observations on 
the recent discoveries will then follow, and we 
shall conclude the work with a review of the geo- 
logical phenomena which have been presented to 
our notice. 
