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December 25th; Descriptive Catalogue of the Ranina of the United States; Observations on the North American Species of Bats; Notices of Some New and Little Known Birds in the Collection of the US Exploring Expedition in the Vincennes and Peacock, and in the Collection of the Academy of Natural Sciences of Philadelphia; Note on the Miocene and Post-Pliocene Deposits of California, with Descriptions of Two New Fossil Corals; Descriptions of a New Species of Pentamerus; Descriptions of Two New Species of Hesperomys; Notices of Some Tape Worms; An Enumeration of Mosses Dejected in the Northern United States, Which Are Not Comprised in the Manual of Asa Gray, MD, Some of Which Are New Species