Lischkeia imperialis, common name : the giant imperial margarite, is a species of sea snail, a marine gastropod mollusk in the family Eucyclidae.

They are crossed by radiating lines of growth, regular and very fine, but raised into low, very sharp lamellae which pass over the periphery onto the upper surface of the whorl.

The body whorl is provided with two strong revolving ribs, one of which forms the periphery, while the other lies a little less than half wav from the first toward the oblique, round suture.

It would be reverted but for the great thickness of the spiral pad, which comes twining up behind it out of the umbilicus, and out of which, at the point of the columella, it forms a flat, triangular, tooth-like expansion.

The umbilicus consists of a minute spiral hole, which twists in between the overlying columellar lip and the umbilical pad.