12 



BULLETIN 36 



Explanation of Plate. 



Page 



Fig. 1. 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. Mactropsis olssoni, n. sp. showing hinge 8 



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



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



body whorl 8 mm 5 



7. Boreotrophon tenuisculpta (Carpenter), same specimen 5 



8. Boreotrophon tenuisculpta, smaller specimen 5 



Height 13 mm. Diam. body whorl 7 mm. 



9. Boreotrophon tenuisculpta (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 



