EXPLANATION OF PLATE XXIX. 



NUCULA PERCRASSA Con., p. 369 



I. Internal cast of a right valve. 



Cliff wood clay; Cliff wood Point, (105). 

 2-3. Views of two internal casts. 



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



4. Internal cast of a right valve. 



Woodbury clay; Lorillard, (.102). 



5. A right valve with the shell preserved. 



Marshalltown clay-marl; near Swedesboro, (1/7). 



NUCULA WHITFIELDI n. sp., p. 371 



6-9. Internal casts of several valves. 



Wenonah sand; near Marlboro, (130). 

 10. Internal cast of a right valve. 



Wenonah sand; near Crazvfords Corner, (126*). 

 11-12. Internal casts of a right and a left valve. 

 Woodbury clay; Lorillard, (102). 



LEDA COMPRESSIFROXS (Whitfield), p. 372 



13-14, 15-16. Views of two internal casts, a left and a right valve ; 

 natural size and enlarged two diameters. 



Woodbury clay; Lorillard, (102). 



17. Internal cast of a right valve probably belonging to this 

 species. 



Merchantville clay-marl; near Jamesburg, (/jp). 



LEDA MARLBOROENSIS n. sp.. p. 374 



18-19. Views of two internal casts, a right and a left valve. 

 20-21. The same, (x2). 



Wenonah sand; near Marlboro, (/jo). 



22. Internal cast of a left valve. 



23. The same, (x2>. 



Wenonah sand; near Crawfords Corner, (126*). 



LEDA CLIFF WOODEN sis n. sp., p. 377 



24-25. Right side and dorsal aspect of the type specimen, a very 

 perfect internal cast. 



Cliff wood clay; Cliff wood Point, (/Of). 

 LEDA PROTEXTA Gabb, p. 375 



26. View of the type specimen, partially restored. (After 



Whitfield.) 



Navcsink marl. 

 LEDA PIXNAFORMIS Gabb, p. 373 



27. View of type specimen, (x3). (After Whitfield.) 



Woodbury clay; Haddonfield, (183). 

 LEDA GABBANA (Whitfield), p. 378 



28. View of a small individual identified by Whitfield. (After 



Whitfield.) 



29-30. Two views of a larger individual identified by Whitfield. 

 (After Whitfield.) 



Navesink marl. 



LEDA TINTONENSIS n. sp., p. 379. 



31-32. Views of the two type specimens. 

 33-34- The same, (x2). 



Tin ton beds; Beers Hill Cut, (129*). 

 938 



