PLATE XV 



PAGE 



Fig. 1. ROSTELLITES MARYLAxoicus Gardner n. sp 424 



Ventral view. Monmouth formation, Brightseat, Prince George's 

 County. 



Figs. 2, 3. AXCHURA (?) :MO.\:\IOUTHEXSIS Gardner n. sp 476 



2. Dorsal view of cast of interior. 



3. Ventral view of same. 



Monmouth formation, Brooks' Estate near Seat Pleasant, 

 Prince George's County. 



Fig. 4. PYRIFUSUS VITTATUS Gardner n. sp 458 



Ventral view of a somewhat crushed specimen. Monmouth formation, 

 Brightseat, Prince George's County. 



Fig. 5. LiopEPLrii CRETACEUM (Conrad) 431 



Ventral view. Monmouth formation, Brightseat, Prince George's 

 County. 



Figs. 6, 7. Lioi'Ei'LiM :\IONMOUTHEXSIS Gardner n. sp 432 



6. Ventral view. 



7. Dorsal view. 



Monmouth formation, 1 mile west of Friendly, Prince George's 

 County. 



Fig. 8. VoLi'TOMORFHA coxRADi Gabb 427 



Ventral view of cast. Monmouth formation, 2 miles southwest of Oxon 

 Hill, Prince George's County. 



Figs. 9, 10. PYROPSIS RETIFER (Gabb) Whitfield 452 



9. Ventral view of cast with portions of shell adhering. X 2. 



10. Dorsal view of same. X 2. 



Monmouth formation, Brightseat, Prince George's County. 



Figs. 11, 12. EPITOXIUM CECILIUM Gardner n. sp 479 



11. Dorsal view of several whorls. 



12. Basal view of same. 



Monmouth formation, Bohemia Mills, Cecil County. 



911 



