The shell is thin, grayish-white in colour, turrited-fusiform, with 7 tumid whorls, regularly increasing; apex obtuse, first embryonic whorl smooth; suture deep; aperture pyriform, 3/7 the total length; the sculpture consists of concentric raised ribs, which are sharp and not rounded, crossed by delicate growth lines; columella curved; canal short and turned to the left; outer lip thin, semicircular; periostracum thin, hispid and golden-brow in colour. Operculum oval, the nucleus subterminal. Length, 33mm.
Distribution: Eastern North Atlantic.
This rare abyssal species is known only from the Eastern North Atlantic, where it occurs on blue mud at depths from 2,450m. and with a bottom tem¬perature of —1°C. The thin elegant shell and regularly increasing whorls readily separates it from S. ebur. Friele (1882,24) observed that the animal is without eyes and the egg-capsuls are high cupola-shaped, 6mm. broad and contain only one embryo. This, together with the radula he describes in detail.
Subgenus Coticrvptus IREDALE, 1918. (Type by o.d. Buccinum fusiforme BRODKKII', 1830).
Shells having a short base and long spire, sculptured with longitudinal ribs.