Explanation of Plate 5 



Fig. 1. — Adviete regina Dall from 522 feet. 



Figs. 2, 3. — Epitonium greenlandicum (Perr\'): 2, from 152 feet; 3, from 216 feet, shown 



with its operculum. 

 Figs. 4—6. — Piliscus commodus (Middendorff). 4, Irom 125 feet, external \'iew. 5, from 



125 feet, showing all white interior. 6, from 175 feet, internal view of specimen with 



radiating reddish stripes. 

 Fig. 7. — Crepidula grandis Middendorff from 217 feet, showing strongl}' curved apex. 

 Fig 8. — Beringius beringi (Middendorff) from 152 feet, a specimen only rccenth" escaped 



from the egg capsule (see pi. 12). 

 Fig. 9. — Tachyrhynchus reticulatum (Mighels) from 438 feet. 

 Fig. 10. — Ptychatractus occidentalis Stearns from 438 feet. 

 Magnification: All X 1.3. 



