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Thesaurus conchyliorum or Monographs of genera of shells . JL IX Thes PlJiS WWest Sowerby Oliva Plate IX Illustration plates biodiversitylibrary org title Sowerby Sowerby Biodiversity Heritage Library Shells Thesaurus conchyliorum or Monographs of genera of shells plates Mollusks Pictorial works Smithsonian Institution