Correction: October 30th; Systematic Catalogue, with Synonyma, &C., of Jurassic, Cretaceous and Tertiary Fossils Collected in Nebraska, by the Exploring Expeditions under the Command of Lieut. G. K. Warren, of U. S. Topographical Engineers; Observations on American Tineina; Descriptions of New Corals in the Museum of the Academy; Catalogue of Carboniferous Plants in the Museum of the Academy of Natural Sciences, with Corrections in Synonymy, Descriptions of New Species, &c.; Description of Several New Species of Plants; Myrmica (Atta) Molefaciens, "Stinging Ant," or "Mound-Making Ant," of Texas; Descriptions of New Carboniferous Fossils from Illinois and Other Western States; Description of New Species of Exocetus, from Chili; Description of New Species of Apodal Fishes in the Museum of the Academy of Natural Sciences, of Philadelphia; Report upon the Reptilia of the North Pacific Exploring Expedition, under Command of Capt. John Rogers, U. S. N