Shell solid, usually with developed axial ribs and feebler spiral sculpture; the aperture expanded and with a wide insinuation behind on the outer lip; canal usually short and wide, nearly straight;

Shell strongly plicate axially, smooth or spirally sculptured, usually with an inconspicuous periostracum; nucleus Chrysodomoid; aperture ample, the outer lip markedly flexuous behind, slightly expanded, simple, sharp; the pillar callous, the canal slightly twisted and recurved, moderately long; operculum as in Colus. (Dall, 1918.)
TYPE. FUSUS kroyeri Moller, 1842.
DISTRIBUTION. Arctic Seas.