PLATE XXXVIII 



PAGE 



Fig. 1. PHOLADOMYA CONRADI Gardner n. sp 632 



Cast of left valve. 1% miles north of Fort Deposit, Alabama, U. S. 

 National Museum. 



Figs. 2-7. VENIELLA CONRADI (Morton) Stoliczka 643 



2. Exterior of very young right valve. X 3. 



3. Interior of same. X 3. 



4. Interior of right valve. 



Monmouth formation, Brightseat, Prince George's County. 



5. Exterior of adult left valve. 



6. Cast of right valve in apposition with left valve. 



7. Dorsal view of same. 



Monmouth formation, Brooks' Estate near Seat Pleasant, 

 Prince George's County. 



034 



