Neptuneopsis gilchristi, common name the Gilchrist's volute, is a species of sea snail, a marine gastropod mollusk in the family Volutidae, the volutes.
The length attains 240 mm, but is usually between 120 mm and 150 mm.
The shell is large and light. The spire is high with convex (outward) whorls and indented suture. The sculpture consists of very fine, dense spiral threads. The aperture is wide, somewhat flaring and tapering to a short siphonal canal. The inner lip lacks pleats, but shows a thin, smooth callus glaze. The protoconch (apex) is bud-shaped and disproportionately large. The operculum is smaller than the aperture. [1]
The shell is pale buff to light orange-brown, covered by a thin, matte olive-brown periostracum. Some specimens display faint, diffuse paler spiral bands.
This marine species is endemic to South Africa and occurs off the West and South coast, Agulhas Bank, at depths between 60 m and 500 m.