OF PART THE FIRST. By JOHN J. Audubon. Description of a new species of Fish from the Hudson River, On the remains of the Megatherium recently discovered in Examination of the acid of the Rhus glabrum; with observa- By FREDERICK S. Cozzens. Note on the organic remains termed Bilobites, from the 45 94 An account of the Phoca cristata recently taken in the vici- Observations on the structure of Trilobites, and description Notice of new localities of simple Minerals along the north By ABRAHAM HALSEY. On the identity of the supposed Pumice of the Missouri, with 79 125 21 |