Shell very small, turrited. Colour pale cream. Whorls eleven including a protoconch of two rounded whorls. Sculpture, the third, fourth, and fifth whorls have a single smooth spiral rib running between the centre of the whorl and the lower suture. From the sixth whorl onwards, this spiral develops conspicuous grains, about fifteen to a whorl, but finally these become obsolete behind the aperture. From the seventh to the last whorl two narrow, wide spaced smooth spiral lyrae revolve above the bead row. Five low spirals ornament the base. Aperture defective in all examples seen, but the direction of growth lines indicate a deep median sinus. Length, 7, breadth 2,95 mm. Several specimens from 800 fathoms.
In size and shape this shell resembles T. crenulata, Donald, but differs in the spiral sculpture.