DESCRIPTION OF THE PLATES. 
Fig. 1. 
а. 
3. 
4. 
5. 
б . 
7 . 
8 . 
9. 
10 . 
11 . 
12 . 
13. 
14. 
15. 
16. 
PLATE XIV. 
A fossil shell of the genus Panopea. 
Bivalve of the genus Fistulana. 
A fossil oyster from Essex, resembling O. deformis, of Lamarck. 
Bivalve of the genus Fistulana. 
A fossil oyster from Essex, resembling O. bia.uriculata, of Lamarck. 
Mass of limestone, with the ampullaceous tubes of Fistulana:. 
The bivalves of Fistulana , with part of their including tubes. 
Fistulana per sonata, with its rotula. 
Snail shell found with the fossil remains of land animals at Brentford. 
Fistulana personata, without its rotula. 
A concameratad teredo. 
a, b, Fistulanm from France, with their tubes. 
Chama calcarata. 
Small oyster, with a spathose structure. 
PLATE XV. 
Fig. 1. Ostrea diluviana. 
2. A fossil oyster, to which the name of Crista galli, or cockscomb oyster, seems most 
applicable. 
3. Gryphites, out of the blue lias, Gloucestershire. 
4. Ostrea from vel folium. 
5. Cast of a shell of the genus Crenatula, from Shotover Hill. 
6. | The outer and inner side of a minute fossil shell, of the genus Crenatula, from 
7. J Bedfordshire. 
8. A fossil shell, of the genus Perna, from Piedmont. 
