EXPLANATION OF PLATE XXIX. 



NUCULA PERCRASSA Con., p. 369 



I. Internal cast of a right valve. 



Cliff wo-od clay; Cliff wood Point, (105). 

 2-3. Views of two internal casts. 



M ' erchantville clay-marl; Lenola, (163). 



4. Internal cast of a right valve. 



Woodbury clay; Lorillard, (102). 



5. A right valve with the shell preserved. 



Marshalltoum clay-marl; near Swcdesboro, (17 f) . 



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 Crawfords Corner, (i26 s ~). 

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

 Woodbury clay; Lorillard, (102). 



LEDA COMPRESSIFRONS (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, (/JO). 



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, (130). 



22. Internal cast of a left valve. 



23. The same, (x2). 



Wenonah sand; near Crawfords Corner, (i^d 3 ). 



LEDA CLIFFWOODENSIS n. sp., p. 377 



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

 perfect internal cast. 



Cliff wood clay; Cliff ^vood Point, (105}. 

 LEDA PROTEXTA Gabb, P- 375 



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



Whitfield.) 



Navesink marl. 

 LEDA PINNAFORMIS 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). 



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

 938 



