12 Bulletin 36 358 



Explanation of Plate. 



Page 



Fig. I. Lirodiscus virginianus , n. sp. Left valve. Long. 19 mm. Alt. 



14 mm ' 8 



2. Anapteris regalis H. & V. W. Right valve, interior. Long. 15 



mm. Alt. 8 mm 9 



3. Anapteris regalis H. &. V. W. , same specimen. Exterior 



view ... 9 



4. Madropsis olssoni, n. sp. showing hinge 8 



5. Madropsis olssoni, n. sp. , right valve. Long. 9 mm. Alt. 8 mm. 8 



6. Boreotrophon tenuisctilpta (Carpenter). Height 16 mm. Diam. 



body whorl 8 mm 5 



7. Boreotrophon temiisculpta (Carpenter), same specimen 5 



8. Boreotropho7i tentcisculpta, smaller specimen 5 



Height 13 mm. Diam. body whorl 7 mm. 



9. Boreotropho7i temiisculpta (Carpenter), same specimen 5 



10. Dentiscala insculpta (Carpenter). Height 14 mm. • Diam. 



body whorl 7 mm 4 



11. Dentiscala insculpta, (Carpenter), same specimen 4 



12. Pteropsis harrisi, n. sp. Hinge 9 



13. Pteropsis harrisi, n. sp. Right valve. Long. 21 mm. Alt 12 



mm. of fragment 9 



