EXPLANATION OF PLATE XXXIX. 



INOCERAMUS QUADRANS Whitfield. p. 426 



1. View of the type specimen. (After Whitfield.) 



Merchantville clay - marl ?; near Burlington. 



INOCERAMUS CONFERTIM-ANNULATUS Roemer, p. 427 



2. View of an incomplete specimen. 



Merchantville clay-marl; near Mafau'an, (/oo 3 ). 



3. View of an incomplete specimen illustrated by Whitfield. 



Navesink marl; Holmdcl. 



4-5. Two views of a left valve. (After Whitfield.) 

 " Navesink marl; Marlboro. 



960 



