Phylum Mollusca Linnaeus, 1758 - molluscs Class Gastropoda Cuvier, 1795 - snails and slugs Subclass Pulmonata Cuvier, 1814 - land snails and slugs see Order Pulmonata Cuvier, 1814 Order Stylommatophora Schmidt, 1855 see Infraorder Stylommatophora Schmidt, 1855 Superfamily Helicacea see Superfamily Helicoidea Rafinesque, 1815