Observations on the Genus Union: Together with Descriptions of New Genera and Species in the Families Naiades, Conchæ, Colimacea, Lymnæana, Melaniana and Peristomiana; Consisting of Four Memoirs Read Before the American Philosophical Society from 1827 T
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Observations on the Genus Union: Together with Descriptions of New Genera and Species in the Families Naiades, Conchæ, Colimacea, Lymnæana, Melaniana and Peristomiana; Consisting of Four Memoirs Read Before the American Philosophical Society from 1827 T
