Include: Gastropoda - slugs and snails

and 7 other classes

1. Bilaterally symmetrical, coelomate
2. Coelom reduced to portions of the reproductive and excretory systems; main body cavity is an open hemocoel.
3. Viscera concentrated as a visceral mass
4. Body covered by thick epidermal-cuticle layer, the mantle
5. Mantle with shell glands secrete calcareous shell plates or shells
6. Heart lies in pericardial chamber, has ventricle and atria
7. Large well-defined muscular foot
8. Buccal region with a radula
9. complete gut, regional specialization, including large digestive ceca
10. Large complex metanephridia (kidneys)

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