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Archive for July 18, 2011

Snails and Slugs

Snails and slugs are grouped together as gastropods – a class of Mollusks that includes land, freshwater and sea snails and slugs.  The term “snail” is used for species with an external shell large enough for the soft parts to withdraw completely into it. Those gastropods without a shell, and those with only a very reduced or internal shell, are usually known as “slugs.” We refer to many marine gastropods as seashells, including whelks, conchs, cowries, olives, cone shells, figs and tulips.  While many gastropods are herbivorous grazers, several groups are carnivores, capable of drilling through the skeleton of their prey.