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Contents: Sexual Variations in Castanea Americana; Sexual Variations in Plants; Rain Trees, Note on Yucca gloriosa; Dioecism in Andromeda Catesbaei, Walt; On fresh-water Sponges; Note on the Seed-vessels of Wistaria; The Phalanges of Bats; Note on a new Northern Cutting Ant, Atta septentrionalis; On some New Lower Eocene Mollusca from Clarke Co., Alabama, with some points as to the Stratigraphical Position of the Beds containing them; The Shining Slavemaker -- Notes on the Architecture and Habits of the American Slavemaking Ant, Polygergus lucidus; On the Temporal and Masseter Muscles of Mammals; Reports of the President, Recording Secretary, Corresponding Secretary, Librarian, Curators, Biological and Microscopical Section, Conchological Section, Botanical Section, Entomological Section, and Mineralogical and Geological Section; Summary of the Report of the Treasurer; Election of Officers for 1881. Illus.
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