43 
THRACiA oblata. 
TAB. DCXXXIL— ^g*. 1 &2, and TAB, 
DXXXlV.^g. 3. (Lutraria oblata.) 
Spec. Char. Transversely elongated, oval, convex, 
surface granular ; posterior extremity trun- 
cated, truncation longitudinal, a little curved ; 
ventral margin nearly straight, beaks nearest 
the anterior extremity ; hinge callus lanceo- 
late. 
Syn. Thracia oblata, Morris, Cat. 102. 
So nearly does this resemble the last that it was not until 
the hinge was observed that there were good grounds for 
considering it more than a variety. An outline of the 
recent species is given at fig. 4 for comparison, the hinge 
is seen on the preceding plate. 
An abundant shell at Bracklesham Bay, Sussex ; it is also 
found in the cliffs at Pegwell Bay and Herne Bay in Kent. 
The imperfect cast figured at tab. 534 . f. 3 . was found at 
Bognor, where it is supposed to be rare. The rich mine 
at Bracklesham, opened by Mr. Bowerbank, has enabled 
us to become better acquainted with a shell so interesting 
from its near resemblance to a recent one that also occurs 
in the crag. 
THRACIA inflata. 
TAB. DCXXXI.— ^g.2,3&4. 
Spec. Char. Ovate, suborbicular, inflated ; pos- 
terior extremity produced, truncated, with a 
