Snail is not biology the last category name, generally refers to all types of terrestrial gastropod. Generally in western language does not distinguish between aquatic snails and land snails, snails only refers to the Chinese terrestrial species, although it includes many different families and genera, animal, but the shapes are similar. The snail belongs to soft animal, Gastropoda; feeding decaying plant matter, lay eggs in the soil in. The most common in tropical islands, but also found in cold area. Arboreal species of bright color, and terrestrial usually monochromatic. Africa 's largest Achatina, much more than 20 cm in diameter. Large European snails of the genus several commonly as food, especially in france. Snail on the land is the most common software of one animal, the snail has high edible and medicinal value.