Splendrillia lalage is a species of sea snail, a marine gastropod mollusk in the family Drilliidae.

(Original description) The small, pinkish white shell is polished and acute.

The axial sculpture consists of (on the penultimate whorl nine) strong rounded ribs most prominent at the periphery, extending from suture to suture, with subequal interspaces, obsolete on the last half of the body whorl and on the base.

The outer lip is thin with no internal lirae and is moderately produced.

[2] This marine species occurs in the Gulf of California and in Panama Bay