PLATE LXXIII. 
PiGE 
Fig. 1. Tellina (Angulus) dupliniana Dall 299 
1. Exterior of left valve. Duplin Co., N. C; length 12.5 mm. (After 
Dall.) 
Pig. 2. Tellina (Angulus) umbra Dall 300 
2. Exterior of left valve. Duplin Co., N. C; length 12.5 mm. (After 
Dall.) 
Pigs. 3, 4. Macoma LEWIS (Conrad) 301 
3. Interior of right valve. Jones Wharf. 
4. Exterior of left valve. Same locality. 
Pigs. 5, 6. Metis biplicata Conrad 301 
5. Interior of left valve. Jones Wharf. 
6. Exterior of right valve. Same locality. 
Fig. 7. Macoma maeylandica n. sp 302 
7. Interior of right valve. 
Figs. 8, 9. Petbicola hakrisii Dall 302 
8. Exterior of right valve. Jones Wharf. 
9. Interior of left valve. Same locality. 
Figs. 10-12. Petricola (Petricolaria) calvertensis Dall 303 
10. Exterior of right valve. Miocene of Maryland; length 17.5 mm. 
(After Dall.) 
11. Distorted right valve. Jones Wharf. 
12. Left valve. Same locality. 
Figs. 13, 14. Callocardia (Agriopoma) sayana (Conrad) 313 
13. Exterior of right valve. Jones Wharf. 
14. Interior of right valve. Same locality. 
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