DR. MANTELL ON THE FOSSIL REMAINS OF TURTLES. 
157 
Fig. 1. Chelonia. 
Fig. 2. Fossil Turtle. 
Mr. Bell also states, that “The fossil is nearly allied in form to the common Euro- 
pean Emys (E. lutaria ) : but the skeleton in the whole genus is so much alike, that 
it is impossible to determine to what species it is most closely related, especially in 
this young state. Of its true fluviatile or lacustrine character, however, there can be 
but little doubt.” From such high authority I cannot presume to differ, and there- 
fore propose the name of Emys Benstedi for this matchless specimen of Turtle from 
the British chalk. It is, however, to be remarked, that the plates of the plastron in 
this example, so far as their characters can be ascertained from the remains figured 
in Plate XII. fig. 1, approach those of the marine Turtles in their form and mode of 
union ; and that the coracoid bone, which is seen displaced and lying in a transverse 
direction beneath the vertebral column (Plate XII. fig. 1. e), more closely resembles 
the corresponding bone of the marine, than it does that of the freshwater Turtles, as 
may be seen by the annexed figures. Fig. 3. Coracoid of the fossil ; fig. 4. the cor- 
responding bone of a marine Turtle ; fig. 5. the coracoid of an Emys*. 
Fig. 3. Fig. 5. Fig. 4. 
* “ Dans les tortues de mer, l’os coracoidien est tres long, et peu elargi a son extremite stemale. Dans les 
tortues d’eau douce il est plus long que large.” — Oss. Foss., tom. v. p. 21 1. 
Y 2 
