Phylum Mollusca Linnaeus, 1758 - molluscs Class Cephalopoda Cuvier, 1795 - cephalopods 1 Subclass Nautiloida Agassiz, 1848 see Subclass Nautiloidea Agassiz, 1848 2 Subclass Coleoida Bather, 1888 see Subclass Coleoidea Bather, 1888