PLATE XLIV. 



PAGE 



Figs. 1, la. Anomia mcgeei Clark 187 



1. Exterior of left valve of type specimen. Hanover Co., Va. Acad. 



Nat. Sci. PMla. 

 la. Interior of the same. 



Figs. 2, 2a, 3. Anomia marylandica n. sp 187 



2. Exterior of left valve. Popes Creek. 

 2a. Interior of the same. 



3. Exterior of left valve. Same locality. 



Figs. 4, 5, 6. Pecten choctavensis Aldrich 188 



4. Exterior of right valve. Popes Creek. The height of the orig- 



inal is 13.5 mm. instead of 11 mm. as the line indicates. 



5. Exterior of left valve. Popes Creek. 



6. Exterior of left valve of smaller individual. Same locality. 



Figs. 7, 7a, 7b. Pecten dalli Clark 188 



7. Exterior of right valve of tj'^pe specimen. Potomac Creek. 

 7a. Hinge of the same. X 2 



7b. Interior of the same. 



Figs. 8, 8a. Pecten johnsoni Clark 189 



8. Exterior of left valve of type specimen. Potomac Creek. 

 8a. Interior of the same. 



Figs. 9, 9a. Pecten sp 190 



9. Interior of right valve. Potomac Creek. 

 9a. Exterior of the same. 



296 



