UNIVALVES

Including limpets, puncturellas, snails, hoofsnails, slippersnails, abalones, dogwinkles, unicorns, hornmouths, mangelias, whelks, amphissas, drills, trophons, periwinkles, lacunas, nassas, bittiums, wentletraps, balcis, solarelles, margarites, turbans, olives, margin shells, spindle shells, tritons, oenopotas, caecums, lamellarids, earshells and iselicas.