PLATE LXXXVIII. 
PAGE 
Figs. 1-3. Brycina mabylandica n. sp 328 
1. Exterior of left valve. Three miles south of Chesapeake Beach. 
2. Interior of right valve. Same locality. 
3. Interior of right valve. Plum Point. U. S. National Museum. 
(After Dall.) 
Figs. 4a, 4b. Erycina rickardia n. sp 328 
4a. Interior of right valve. Plum Point. 
4b. Exterior of same valve. 
Fig. 5. Brycina speciosa n. sp 329 
5. Interior of right valve. Plum Point. 
Figs. 6-8. Bornia mactroides (Conrad) 330 
6. Interior of left valve. Dover Bridge. 
7. Exterior of right valve. Same locality. 
8. Interior of right valve. Same locality. 
Figs. 9a, 9b. Bornia Triangula Dall 330 
9a. Interior of right valve. Three miles west of Centerville. 
9b. Exterior of same valve. 
Fig. 10. Bornia mary'landica n. sp 330 
10. Interior of right valve. Greensboro. 
Fig. 11. Bornia depressa n. sp 331 
11. Interior of right valve. Plum Point. 
Figs. 12, 13. Kellia rotundui-a n. sp 331 
12. Interior of right valve. Governor's Run. 
13. Interior of left valve. Same locality. 
Figs. 14-18. Thecodonta (Dicranodesma) calvertensis n. sp 332 
14. Interior of right valve. Plum Point. 
15. Interior of left valve. Same locality. 
16. Exterior of left valve. Same locality. 
17. Interior of left valve. Plum Point. U. S. National Museum. 
(After Dall.) 
18. Interior of right valve. Plum Point. U. S. National Museum. 
(After Dall.) 
Fig. 19. MONTACUTA MARIANA Dall 332 
19. Interior of right valve. St. Mary's River or Plum Point. U. S. 
National Museum. (After Dall.) 
Figs. 20, 21. Aligena .equata (Conrad) 333 
20. Exterior of left valve. Jones Wharf. 
21. Exterior of right valve. Same locality. 
