Report on the United States and Mexican Boundary Survey, Made Under the Direction of the Secretary of the Interior: pt. 2. Geological reports of Dr. C. C. Parry and assistant Arthur Schott. Notes by W. H. Emory. Paleontology and geology of the boundary, by James Hall, of Albany, N. Y. Description of the boundary, by James Hall, of Albany, N. Y. Description of cretaceous and tertiary fossils, by T. A. Conrad, esq