The shell grows to a length of 13.4 mm. This species is closely related to
Turbonilla dalli, but is more slender, longer, with a more pointed apex, and smaller
protoconch. The less convex
whorls of the
teleoconch are more numerous ribs and the
aperture is more elongated. The
suture is well marked. The projecting whorls of the small protoconch are transverse to the axis. The 12 whorls of the teleoconch are slightly convex. There are about 20 transverse ribs. These are rather stout, nearly perpendicular, and rounded. They are separated by about equally wide, deep, concave spaces terminating at the periphery of the
body whorl in clean-cut ends. The base of the shell is rounded, and smooth. The aperture is squarish, somewhat expanded below and with rounded angles. The
inner lip is thickened, and reflected. The entire surface is covered by very fine, microscopic striae. ==Distribution==