OF TILOATE FOREST. 
257 
osseous border of the carapace, found in Tilgate 
Forest, we have not observed any that have a sha- 
green surface ; a negative })root‘ that the fossil, like 
the recent trionyx, was destitute of that apj)endage. 
The specific name of this fossil trionyx is given 
as a tribute of respect to Robert Rakewell, Esq. 
a gentleman well known in the scientific world, 
and the author of decidedly the best “ Introduc- 
tion to Geology” in this or any other language. 
Emydea. Ereshicater Turtles . — In referring some 
of tlie bones of the Tilgate beds to this subgenus, we 
proceed on certain grounds ; since the subject has 
already been elucidated by Baron Cuvier. Among 
the Sussex fossils which we transmitted to that 
celebrated naturalist some years since, were por- 
tions of the buckler, or carapace, of the same 
species as the fragments here delineated. These 
M. Cuvier determined to belong to a remarkably 
flat, unknown species of Emys ; which occurs also 
in the Jura limestone, in the vicinity of Soleure* ; 
they even correspond, in size, with a specimen 
figured in pi. xv. fig. 6. “ Oss. Foss.” tome v. ; and 
which, if entire, would have exceeded twenty 
inches in breadth. 
The species with smooth plates and ribs are by 
far the most abundant in the Tilgate strata ; but, 
from our not having been so fortunate as to dis- 
cover any united portions of the upper shell, we 
cannot, in every instance, determine whether the 
specimens presented to our notice belong to fresh- 
* The specimens at Soleure are associated with the jaws and teeth 
of Spari, and other fishes ; Terebratula;, Echini, and other marine 
exuviae. 
