Mitra incompta: Shell up to 112 mm (about 4,5 inches) in length, fusiformly-elongate, solid and heavy, sutures distinct and minutely crenulate. Nuclear whorls eroded, postnuclear whorls 7-8, spire whorls flat-sided or slightly convex, sculptured with very irregular, slender and crowded axial ribs which are rendered nodulose through bisecting, pitted spiral grooves which number from 6-9 on the penultimate whorl; on the body whorl the spiral grooves become spiral cords towards the base. In some specimens the axial sculpture is subdued. Aperture moderately narrow, shorter than the spire, smooth within; outer lip straight, angulate basally, thickened in adult specimens and finely crenulate at the margin. Columella only superficially glazed and with 5 oblique folds; siphonal canal straight or slightly recurved, siphonal notch distinct, siphonal fasciole thickened and corded. Cream in colour, ornamented with dark brown axial stripes which are interrupted by a broad zone on the body whorl; aperture cream to golden-yellow, crenulations on margin of outer lip brown, columella cream. The colour pattern is obscured by a brown and moderately opaque periostracum.

Mitra incompta: Range: East Africa to Polynesia and the Hawaiian Islands.
Habitat: The species is moderately rare throughout its distributional range; it lives on a hard reef and coral-rubble substratum, from the intertidal zone to a depth of 20 fathoms.