PLATE LVI. 



PAGE 



Figs. 1, 2, 4, 5. Cumingia tellinoides (Conrad) 197 



1. Exterior of right valve. Wailes Bluff. X 2 1 /> 



2. Interior of same. 



4. Exterior of left valve. Wailes Bluff. X 2% 



5. Interior of same. 



Figs. 3, 6. Tellixa (Axgelus) tenera Say 19S 



3. Interior of right valve. Wailes Bluff. X 4 



6. Exterior of same. 



Figs. 7-10. Macoma balthica (Linne) 199 



7. Interior of left valve. Wailes Bluff. X 1% 



8. Exterior of right valve. 



9. Interior of same. 



10. Exterior of left valve. 



