DIAGNOSIS: An elongate Coluzea with a high spire of regularly convex whorls cut by a median serrate keel. Posterior whorl slope with two prominent spiral cords, but on some specimens there are up to six. Anterior whorl slope of body whorl with four to eight spiral cords.
DESCRIPTION: Shell fusiform with a high spire of regularly convex whorls bisected by a keel bearing triangular serrations. Early whorls ribbed axially with the ribs fading on about the seventh whorl. Posterior whorl slope with four to six prominent spiral cords; anterior whorl slope of spire whorls with one to three cords, on body whorl from four to six cords. Aperture semicircular. Canal long and straight. Operculum pyriform tapering rapidly to an acute nuclear apex.

Of the four specimens examined none had the apex preserved. However Barnard (1959, p. 234) has given a description and figure which matches the protoconch of Coluzea angularis (Barnard) which the author has examined. As originally stated by Watson this species bears a considerable resemblance to Coluzea spiralis (A. Adams) but apart from the difference in the protoconch the latter has no axial ribs on the early whorls as in C. radialis.

TYPE LOCALITY: Challenger Station 142, Lat. 35°4'S.; Long. 18°37'E. off the Cape of Good Hope, South Africa, 150 fathoms.