Shell of moderate size, 20-25 mm., elongate-ovate, pure white, typically smooth and shining, but sometimes with faint spirals or narrow flexuous subobsolete axials. The genus resembles Daphnella in general facies, particularly in shape and in the reversed L-shaped sinus, but has a paucispiral bluntly rounded smooth protoconch of 1 ½ to 2 whorls, and a vestigial operculum, this feature, so far as is known, being entirely wanting in Daphnella. The operculum is leaf-shaped, with a terminal nucleus; in height it is less than a third of the aperture. The radula is toxoglossate, consisting of a pair of slender, straight, awl-shaped marginals only, which are barbed on one side, near the tip. That of Daphnella (cancellata Hutton) is curved, awl-shaped and is constricted from both sides near the tip but not barbed.

Shell medium sized, attaining 48 mm, elongate-ovate to narrowly fusiform, high spire, narrow to moderately wide ovate last whorl, wide, attenuated siphonal canal. Protoconch paucispiral, large, smooth, c.2 whorls. Teleoconch whorls weakly to moderately convex, may be weakly angulated at shoulder, subsutural ramp shallow, concave. Anal sinus subsutural, shallow to moderately deep. Axial sculpture limited to growth lines, some thickened and more pronounced, producing appearance of irregularly spaced axial ribs. Spiral sculpture of cords may be weak or obsolete in some species, covering entire shell. Aperture moderately high, narrow, oval.
Operculum present, small, with terminal nucleus.
Odontophore absent. Radula of slightly curved hypodermic marginal teeth with small rounded bases, two medium sized apical barbs.

Range — Antarctic Area. Patagonia, Cape Horn, South Georgia, Marion, Prince Edward and Kerguelen Islands.