One quarter pound of Brown Littorina Shells measuring mostly under 1/4 inch******

One quarter pound of Brown Littorina Shells measuring mostly under 1/4 inch.

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Littorina are small marine snails found in warm and cool waters throughout the world.

The common periwinkle or winkle (Littorina littorea) is a species of small edible whelk or sea snail, a marine gastropod mollusc that has gills and an operculum, and is classified within the family Littorinidae, the periwinkles

The Littorina shell is broadly ovate, thick, and sharply pointed except when eroded. The shell contains six to seven whorls with some fine threads and wrinkles. The color varies from grayish to gray-brown, often with dark spiral bands. The base of the columella is white. The shell lacks an umbilicus. The white outer lip is sometimes checkered with brown patches. The inside of the shell is chocolate brown.

(details provided by Linnaeus C. (1758). Systema naturae per regna tria nature, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis. Tomus I. Editio decima, reformata. pp. [1-4], 1-824. Holmiae. (Salvius).)

The common periwinkle/Littorina is mainly found on rocky shores in the higher and middle intertidal zone. They sometimes dwell in small tide pools & may also be found in muddy habitats such as estuaries that can reach depths of 180 feet.

The L. littorea is an omnivorous a grazing intertidal gastropod. They are primarily an algae grazer, but will feed on small invertebrates such as barnacle larvae. Littorinas use their radula to scrape algae from rocks and, in the salt marsh community, pick up algae from cord grass or from the biofilm that covers the surface of mud in estuaries or bays.