TAB. XXXIV. 



FIG. 



1 . Ostrea Wiltonensis, Lye. Forest Marble. 



1 a - " A monstrosity of the same species. 



2, 2 a. Perna obliqua, Walton, MSS. Forest Marble. 



Ostrea costata, Sow. Great Oolite. Also Part II, Tab. I, fig. 5, page 3. 



