 It is slightly crenulated upon the lip, and furnished interiorly with fifteen or sixteen
transverse striae which are continued even to the depth of the cavity.The emargination is very oblique, accompanied externally by a thick, rounded, and twisted varix, which, revolving around the axis, terminates below the folds of the columella.This is slightly arcuated; one or two oblique folds are delineated at its base.