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(a) Optical image showing the dissection of a 7 cm long radula from the limpet mouth. (b) Scanning electron micrograph of the radula with rows of exposed teeth. (c) Scanning electron micrograph of an individual limpet tooth exposed from the silver paint surface prior to focused ion beam preparation. (d) Scanning electron micrograph of the tooth surface indicating the presence of fibrous goethite mineral. (Online version in colour.)
