Horned Murex
... that a Tyrian purple dye can be extracted from the West African Horned Murex sea snail ?
... that a <a href="./Tyrian_purple" id="mwFU0" rel="mw:WikiLink" title="Tyrian purple">Tyrian purple</a> dye can be extracted from the West African <b id="mwFU4"><a href="./Bolinus_cornutus" id="mwFU8" rel="mw:WikiLink" title="Bolinus cornutus">Horned Murex</a></b> sea <a href="./Snail" id="mwFVA" rel="mw:WikiLink" title="Snail">snail</a> <i id="mwFVE">(shell pictured)</i>?