Phylum [Mollusca] Linnaeus, 1758 - molluscs 1 Class Gastropoda Cuvier, 1795 - snails and slugs 2 Class Scaphopoda Bronn, 1862 - tusk shells 3 Class Cephalopoda Cuvier, 1795 - cephalopods 4 Class Bivalvia Linnaeus, 1758 - bivalves