TAB. XXXIV. 



Fig. 



1. Ostrea Wiltonensis, Lye. Porest Marble. 



1 a. „ „ A monstrosity of the same species. 



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



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



