Animal ShellsPinctadaMolluscaCalcium CarbonateAlveolitis, Extrinsic AllergicIndustryBivalviaGastropodaEgg ShellSnailsBiomphalariaLymnaeaMollusk VenomsMytilusPolyplacophoraOstreidaeClionePectinidaeAplysiaShellfishCrassostreaInvertebratesCephalopodaNucleus AccumbensAnimal StructuresGanglia, InvertebrateAngiostrongylusHelix (Snails)AnnelidaMytilidaeRadiometric DatingNautilusMytilus edulisAngiostrongylus cantonensisOctopodiformesFossilsMolecular Sequence DataPhylogenyAnomuraMoonArchaeologyFMRFamideChlordanEscape ReactionHemolymphGillsAmino Acid SequenceMagic