PLATE XII 



PAGE 



Fig. 1. SCAPHITES CONKADI (Morton) 383 



Lateral view of fragment of whorl. Monmouth formation, Brightseat, 

 Prince George's County. 



Figs. 2, 3. BACULITES OVATUS Say 375 



2. Lateral view. 



3. Posterior view of same. 



Matawan formation, near Summit Bridge, Chesapeake and 

 Delaware Canal, Delaware. 



Figs. 4-6. BKLEMXITELLA AMERICANA (Morton) 394 



4. Median longitudinal section of rostrum showing radial fibers and 



cavity of phragmacone. 



5. Ventral view of rostrum. 



6. Ventral view of another specimen. 



Monmouth formation, Bohemia Mills, Cecil County. 



Fig. 7. MORTONICERAS DELAWAREXSis (Morton) Weller 391 



Peripheral view of portion of whorl. Matawan formation, near Sum- 

 mit Bridge, Chesapeake and Delaware Canal, Delaware. 



Figs. 8, 9. BACULITES ASPER Morton 377 



8. Lateral view. X 1%. 



9. Posterior view of same. X 1%. 



Matawan formation, Post 218, Chesapeake and Delaware 

 Canal, Delaware. 



908 



