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Pilsbry, H.A. 1891. Land and Fresh-Water Mollusks collected in Yucatan and Mexico. Proc. Acad. Nat. Sci. Philad. 1891, (25 Aug - 22 Sep) 1891: 310-334, pls. XIV-XV. [25 Aug 1891: 297-328; 22 Sep 1891: 329-334] ≡

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