EXPLANATION OF PLATE LVI. 



PHOLADOMYA OCCIDENTAUS Morton, p. 5 J 3 



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

 internal cast. 



Merchantville clay-marl; Lenola, (163). 



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. 51 1 



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, (177}. 



LITHOPHAGA RIPLEYANA (Gabb), p. 512 



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



Navesink marl; Mullica Hill, (i(5p). 

 11-12. Lateral and cardinal views of a rougher example. 

 Navesink marl; near Walnford, (148). 



CERCOMYA PECULARIS (Conrad), p. 518 



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

 Navesink marl; Crosswicks Creek. 



994 



