Benson, W. H. (1848). Characters of seven new species of Helix, with amended descriptions of some species previously described, and notes on others requiring remark. Annals and Magazine of Natural History. (2) 2: 158-164.
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Benson, W. H.
1848
Characters of seven new species of <i>Helix</i>, with amended descriptions of some species previously described, and notes on others requiring remark