Plate VII. 



VIII. Deep northern basins and troughs, 230-1,500 meters. 

 Hiu. 



1. Tiirriti'lla, sp. Aperture, size - 37 ■ 10 mm. 



2. Boreotrophon, n. sp. .Aperture, size - 40 x 19 mm. 



3. Fiisiniis traski Dall, 1915. Aperture, size -43 >; 15 mm. 



4. Acila castrensis Hinds, 1843. Exterior, size- 11 x 10mm. 



5. Nuculana taphria (Dall, 1897). Exterior, size -13x8 mm. 



6. Nuculana hamata Carpenter, 1864. A. Exterior, B. Interior, size - 1 1 -6 mm. 



7. Glycymeris cortezianus (Dall, 1901). A. Exterior, B. Interior, size - 19 > 8 mm. 



8. Cardita harbarensis (Stearns, 1890). A. Exterior, B. Interior, size- 17 x 15 mm. 



9. Lucina tenuisculpta (Carpenter, 1864). A. Exterior, B. Interior, size -8 x 7.5 mm. 

 10. Hiatdla ardica (Linne, 1767). A. Exterior, B. Interior, size- 11 • 6mm. 



IX. Upper slope, central and southern gulf, 1 2 1-730 meters. 



11. Pundurella expansa Dall, 1896. A. Exterior, B. Interior (animal), size - 23 x 20 mm. 



12. Solariella permabilis Carpenter, 1864. Aperture, size -7-9 mm. 



13. Nassarius insculptus gordanus Hertlein and Strong, 1951. Aperture, size - 22 >: 12 mm. 



14. Nassarius miser (Dall, 1908). Aperture, size - 12 x 7 mm. 



15. Clathurdla thalassoma (Dall, 1908). Aperture, size -22 x 8 mm. 



16. Nucula cardara Dall, 1917. Exterior, size -10x7 mm. 



17. Cydopeden zacae (Hertlein, 1935). Exterior, size - 8 ' 7 mm. 



