—, Thomson's scientific, xviii, 198.
Medical electricity, J. Hall, iii, 168.
— School of South Carolina organized, ix, 392.
Medina sandstone, freshwater fossils not occurring in, xlii, 230.
Medusa, fossil, C. S. Rafinesque, iii, 285.f
Megalonyx, R. Owen, xliv, 342.
—, localities of, in the U. States, xxvii, 353; xlv, 209.
Megatherium, no bony armor to, xxxvii, 371.
—, remains of, in Indiana, R. Haymond, xlvi, 294.
—, of Georgia, xxvii, 353.