PLATE XVII 



PAGE 



Fig. 1. TURRITELLA PARAVERTEBBOiDES Gardner n. sp 488 



View of several whorls. Monmouth formation, Brightseat, Prince 

 George's County. 



Fig. 2. VOLUTOMORPHA PERORNATA Gardner n. sp 428 



Dorsal view. X 2. Monmouth formation, Brightseat, Prince George's 

 County. 



Figs. 3, 4. TURRITELLA DELMAB Gardner n. sp 487 



3. Squeeze of mold of exteriors. X 2. 



4. Internal cast. X 2. 



Matawan formation, Post 105, Chesapeake and Delaware 

 Canal, Delaware. 



Figs. 5, 6. PUGNELLUS GOLDMAN i Gardner n. sp 469 



5. Ventral view. 



6. Dorsal view. 



Monmouth formation, Brightseat, Prince George's County. 



Fig. 7. EPITONIUM MARYLAXDICUM Gardner n. sp 478 



View of several whorls. X 3. Monmouth formation, Brightseat, 

 Prince George's County. 



Figs. 8, 9. SERPULORBIS MARYLANDICA Gardner n. sp 482 



8. Upper surface of two constituent tubes. X 2. 



9. Lower surface of same. X 2. 



Monmouth formation, Brightseat, Prince George's County. 



Fig. 10. TURRITELLA BONASPES Gardner n. sp 487 



View of squeeze of mold. X 2. Magothy formation, Good Hope Hill 

 near Anacostia, D. C. 



913 



