Turbonilla aulica is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

They are crossed by strong rounded axial ribs, about sixteen of which appear on the fourth, eighteen on the eighth, and twenty-two on the penultimate whorl.

The spaces inclosed between the first and second, fourth and fifth, and sixth and seventh spiral lines are a little more elevated than the rest and hence appear as stronger nodes on the ribs.

It is marked by the feeble continuation of the axial ribs, which hardly extend to the umbilical region, and eight well-incised subequally spaced, wavy, spiral lines, the raised area between the anterior one of these and the series of pits at the suture is like the raised spaces between the incised lines between the sutures.

The columella is brown; this color tinges the adjacent area, fading out altogether on the middle of the base.