Explanation of Plate 16 



Fig. 1. — Obesotoma tenuilirata (Dall) from 132 feet. 



Fig. 2. — Obesotoma simplex (MiddendorfF) washed ashore Sept. 12, 1949. 

 Fig. 3. — Oenopota nazanensis (Dall) from 216 feet. 

 Fig. 4. — Oenopota tenuicostata (M. Sars) from 420 feet. 



Figs. 5, 6. — Oenopota harpa (Dall) from 420 and 110 feet (Sept. 16, 1948), respectively. 

 Figs. 7, 8. — '^Oenopota" elegans (Moller) from 152 and 204 feet, respectively. 

 Fig. 9. — '^Oenopota" harpularia (Couthouy) from 130 feet (Aug. 9, 1949). 

 Figs. 10, 11. — 'Oenopota" pyramidalis (Str0m) from 453 and 295 feet, respectively. 

 Figs. 12, 13. — '^Oenopota" pyramidalis \"ar. semiplicata G. Sars from 152 and 216 feet, respec- 

 tively. 

 Figs. 14, 15. — Nodotoma impressa (.Morch) from 295 and 477 feet, respecti\-ely. 

 Magnification: All X 2.56. 



