43 



THRACIA oblata. 



TAB. DCKXXU.—Jlg. I & 2, and TAB. 

 DXXXlY.Jig. 3. (Lutraria oblata.) 



Spec, Char. Transversely elongated^ oval, convex, 

 surface i^ranular ; 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. 



oo 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 Heme 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 crajr- 



THRACIA inflata. 



TAB. DCXXXI.— ^g^. 2,3&4. 



Spec Char. Ovate, suborbicular, inflated ; pos- 

 terior extremity produced, truncated, with a 



