Lanayrella vagabunda is a species of sea snail, a marine gastropod mollusk in the family Acteonidae.

The body whorl is large, two-thirds the entire length, slightly swollen, narrowed toward the base, and descending slowly to its termination.

The peristome is nearly straight, slightly thickened, the terminations joined by a very thin white callus.

The columella is white, thickened, twisted, divided by a superficial groove, prolonged to the base of the aperture.

[2] This marine species occurs off Cape Horn, Chile; in the Atlantic Ocean off Brazil and Argentina.