PLATE XCIII. 
PAGE 
Figs. 1-3. Crassatellites martlakdicus (Conrad) 347 
1. Exterior of left valve. Dover Bridge. 
2. Exterior of left valve of young individual. 
3. Interior of left valve. Same locality. 
Figs. 4-6. AsTAETE cuNEiFOKMis Conrad 353 
4. Exterior of right valve. Plum Point. 
5. Exterior of right valve. Same locality. 
6. Interior of left valve. Same locality. 
Figs. 7-9. ASTAETE CASTRANA n. sp 353 
7. Interior of right valve. Reed's. 
8. Exterior of right valve. Same locality. 
9. Exterior of left valve. Same locality. 
Figs. 10, 11. AsTAKTE viciNA Say 350 
10. Exterior of right valve. Plum Point. 
11. Interior of left valve. Same locality. 
