(ofHelix monodon Rackett, 1821)Rackett, T. (1821). Description of some shells found in Canada. Transactions of the Linnean Society of London, 13: 42-43, plate 5. page(s): 42, pl. 5, fig. 2 [details]
original description(ofHelix monodon Rackett, 1821)Rackett, T. (1821). Description of some shells found in Canada. Transactions of the Linnean Society of London, 13: 42-43, plate 5. page(s): 42, pl. 5, fig. 2 [details]
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