EXPLANATION OF PLATE LVIII. 



CLAVAGELLA ARMATA Morton, p. 525 



-i-2. Lateral and cardinal views of a very perfect internal cast. 



Navesink marl; Atlantic Highlands, (108} . 

 LIOPISTHA KUMMELI n. sp., p. 529 



3. Lateral view of the type specimen, an internal cast. 



Merchantville clay-marl; L,enola, (163). 

 LIOPISTHA PROTEXTA (Conrad), p. 526 



4. Lateral view of an internal cast of a single valve. 



Red Bank sand; near Middletown, (112). 

 5-6. Lateral and cardinal views of a very perfect internal cast. 

 Navesink marl; Mullica Hill, (169). 



LIOPISTHA ALTERNATA n. sp., p. 527 



7-8. Lateral views of two internal casts. 



Merchantville clay-marl; near Matawan, (/oz). 

 9. Lateral view of an internal cast. 



Merchantville clay-marl; near Jamesburg, (139). 

 CYMELLA BELLA Conrad, p. 530 



10. Lateral- view of an incomplete internal cast of a single valve. 



Cliff wood clay; near Matawan, (/o/). 



11. Lateral view of an internal cast of a single valve. 



Wenonah sand; near Marlboro, (/jo). 



12. Lateral view of the internal cast of a large single valve. 



Woodbury clay; Lorillard, (102) . 

 CYMELLA UNDATA (Meek and Hayden), p. 531 



13. Lateral view of a small single valve. 



Wenonah sand; near Marlboro, (/jo). 



CUSPIDARIA JERSEYENSIS n. Sp., p. 534 



14-15. Lateral and cardinal views of the type specimen. 



Navesink marl; near Crawfords Corner, (126^). 



CUSPIDARIA VENTRICOSA (Meek and Worthen), p. 533 



16-17. Lateral views of two more or less distorted internal casts of 

 separate valves. 



Red Bank sand; Red Bank, (116). 

 VENIELLA CONRADI Morton, p. 534 



18. External view of a nearly perfect left valve. 



19. View of the hinge of a right valve. 



Marshalltown clay-marl; near Swedesboro, (177). 



ETEA TRAPEZOIDEA (Conrad), p. 543 



20-21. Lateral views of two internal casts. 



Merchantville clay-marl; near Matawan, (/Ol). 



VENIELLA ? RHOMBOIDEA Conrad, p. 538 



22-24. Lateral, cardinal and anterior views of a nearly perfect in- 

 ternal cast. 



Manasquan marl; Farmingdale. 



VENIELLA ? DECISA (Morton), p. 54<> 



25-26. Lateral and posterior views of an internal cast identified as 

 this species by Whitfield. 



Hornerstown marl; Blue Ball. 



998 



