Littorina lepida Gould, 1849 Littorina scutulata is a species of sea snail, a marine gastropod mollusk in the family Littorinidae, the winkles or periwinkles.

Its eye anatomy is similar to that of the land snail Helix aspera.

It is distributed from Kodiak Island, Alaska, to Bahia de Tortuga, Baja California.

[2] In 2015, an unusual case of L. scutulata being found inside the human body occurred in San Pedro, Los Angeles, when an immature specimen was found inside the knee joint of an eleven year-old boy who had recently fallen and injured his knee on a rock while exploring a tide pool.

The force of the impact with the rock drove the snail into the patient’s skin, and it was able to survive despite the formation of an abscess by the immune system around it.