Different types of colorful sea urchins and their spines, from Charles d'Orbigny's "Dictionnaire Universel d'Histoire Naturelle" (Universal Dictionary of Natural History) 1849 (hand-coloured engraving)
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Different kinds of coloured sea urchins with their spines. Different types of colorful sea urchins and their spines.The very rare purple club spined or artichoke urchin (Echinus atratus), round urchin (Echinus globiformis), Cidarites imperialis, Scutella radiata, Scutella quinquefora. Handcolored engraving by Dujardin from Charles d'Orbigny's “Universal Dictionary of Natural History” 1849.