EXPLANATION OF PLATE CVII. 



SCAPHITES NODOSUS Owen ?, p. 824 



1-2. Lateral and dorsal views of an imperfect specimen illustrated 

 by Whitfield. 



Locality not known. 



SCAPHITES HIPPOCREPIS (DeKay), p. 826 



3-5. Three views of an internal cast. 

 6. Lateral view of another internal cast. 



Merchantvillc clay-marl; Lenola, (163). 



PTYCHOCERAS (SOLENOCERAS) ANNULIFER Morton, 



7-9. Three views of the type specimen, (x2). 



Merchantville clay-marl, Delaware and Chesapeake 

 Canal. 



1098 



