Shell rather large mid thin, regularly fusiform. Colour pale yellow-orange, with a zone of alternate brown and buff beneath the suture.' Whorls eight, of which three are included in the protoconch. Suture impressed. Sculpture : Radials entirely absent; spirals amount to thirty-two on the last whorl and to ten on the penultimate; the summit of the whorl is crowned by a strong cord followed by a corresponding sulcus, thence the spirals diminish to the periphery, where they are small and crowded, with another change the base and snout are occupied by eight broad and widely spaced spirals. Lip incomplete in the specimen examined ; the columella has two low folds. Length 13 mm., breadth 5 mm.

This species stands near to Mitromorpha alba, but M. columnaria is of more slender proportions, thinner, longer, and with more numerous, finer spirals.