G. B. Sowerby I, 1833
Medium-sized to large, moderately solid to heavy. Last whorl narrowly conical or narrowly conoid-cylindrical to ventricosely conical; outline convex adapically, straight below and sometimes slightly concave at centre. Siphonal fasciole varies from weak to prominent. Shoulder sharply angulate to almost rounded. Spire of low to moderate height, outline straight to slightly convex. Teleoconch sutural ramps flat to concave, with 2 increasing to 5-8 spiral grooves; occasionally latest ramps with 10-12 variably fine spiral grooves. Last whorl with spiral grooves at base, separating broad ribbons or strong ribs.
Ground colour white to pale brown; in subadult specimens of form poehlianus, white ground suffused with pale brownish violet. Last whorl with 1-2 spiral bands above and 1 band below centre; band nearest shoulder often interrupted or absent, or both adapical bands may fuse. Colour of bands ranges from yellowish brown to violet or dark brown. Dotted, dashed or solid brown spiral lines from base to shoulder, varying in number and arrangement.