EXPLANATION OF PLATE LVI. 



PHOLADOMYA OCCIDENTAUS Morton, p. 513 



1-3. Anterior, lateral and cardinal views of a nearly complete 

 internal cast. 



Merchantville clay-marl; Lenola, (/6j). 



PHOLADOMYA ROEMERI Whitfield, p. 515 



4. Lateral view of the type specimen. 



Wenonah sand; near Marlboro. 



5. Lateral view of a smaller individual. 



Wenonah sand; near Marlboro, (130). 



CRENELLA ELEGANTULA Meek and Hayden, p. 511 



6. Lateral view of an internal cast. 



Tinton beds; Beers Hill Cut, (129*}. 



CRENELLA SERICA Conrad, p. 510 



7-8. Lateral views of two single valves, (x2). 



Marshalltown clay-marl; near Swedesboro, (/77). 



LITHOPHAGA RIPLEYANA (Gabb), p. 512 



9-10. Lateral and cardinal views of a rather smooth example. 



Nave sink marl; Mullica Hill, (/dp). 

 H-I2. Lateral and cardinal views of a rougher example. 

 Navesink marl; near Walnford, (148). 



CERCOMYA PECUI/A^IS (Conrad), p. 518 



13-14. Two views of the type specimen. (After Whitfield.) 

 Navesink marl; Crosswicks Creek. 



994 



