— —, Prof. Phillips on the carboniferous limestone of Yorkshire, xxxiii, 84.
— —, marine shells in deposits, xxv, 199.
— —, mines of Dudley, visit to, xxxvii, 390.
— in Illinois, C. U. Shepard, xxxiv, 142.f
— —, D. D. Owen, xlv, 151.
— —, Kentucky, S. P. Hildreth, xxix, 140.
— in Maine, formation of, C. T. Jackson, xxxvi, 149.
— in Maryland, J. T. Ducatel and J. H. Alexander, xxvii, 29.
— —, chemical analysis of, ibid, xxvii, 31.
— in Massachusetts, E. Hitchcock, xxii, 41; xxxvi, 377.