TAB. XXIV. 
Fic. * 
i: Ostrea Wiltonensis, Zyc. Forest Marble. : 
la. a rf A monstrosity of the same species. 
2, 2a. Perna obliqua, Walton, MSS. Forest Marble. 
3. Ostrea costata, Sow. Great Oolite. Also Part II, Tab. I, fig. 5, page 3. 
