February 27th, 1849; Notes of the Post Mortem Appearances of a Cynocephalus? Which Died in the Menagerie at Philadelphia; Descriptions of New Fresh Water and Marine Shells; Descriptions of New Species of the Genera Nyctale, Brehm., and Sycobius, Vieill.; Specimens of Which Are in the Collection of the Academy of Natural Sciences of Philadelphia; Notes of an Examination of the Vulturidœ, in the Collection of the Academy of Natural Sciences of Philadelphia