Phylum Mollusca Linnaeus, 1758 - molluscs Count: - Class Gastropoda Cuvier, 1795 - snails and slugs Count: - Subclass Opisthobranchia Milne-Edwards, 1848 - opisthobranchs see Order Opisthobranchia Milne-Edwards, 1848 Count: - Order Sacoglossa Ihering, 1876 - sacoglossans Count: -