Prunum labiatum (Kiener, 1841)

The Prunum is crawling over a bubble shell (Haminoea species).

Prunum labiatum (Kiener, 1841)

By SCUBA Cozumel, Mexico 4/24/2013. Photograph copyright 2013 by Linda Ianniello

Prunum labiatum (Kiener, 1841)
 (both about 28 mm.)