EXPLANATION OF PLATE XLIII. 



OSTREA DENTICULIFERA Conrad, P- 436 



1-2. Internal and external views of two nearly complete valves, 

 identified by Conrad. (After Whitfield.) 



Woodbury clay; Haddonfield, (183). 



OSTREA FALCATA Morton, P- 444 



3-6. Views of four nearly perfect single valves. 



Marshalltoin'n clay-marl; near Sivedesboro, (17?) 



OSTREA NASUTA Morton p. 447 



7-8. Views of two nearly complete single valves. (After Whit- 

 field.) 



Navesink marl. 



OSTREA MESENTERICA Morton, p. 446 



9-14. Views of six nearly perfect single valves. 



Xavesink marl; near Holmdel, (i^/ 5 ). 



OSTREA MONMOUTHENSIS n. sp., p. 442 



15. View of the type specimen. 



Navesink marl; near Craw fords Corner, (126*). 



OSTREA CONGESTA Conrad, p. 435 



16. View of an internal cast of the attached valve. 



CKffwood clay; Cliffu'ood Point, (705). 



OSTREA TECTICOSTA Gabb, p. 443 



17-18. Views of two casts of single valves referred to this species. 



Wenonah sand; near Marlboro, (/jo). 

 19. Exterior view of the type specimen. (After Whitfield.) 



968 



