—, —, transition, condition and character of, T. A. Conrad, xxxvi, 12; xxxviii, 86.
—, —, freshwater shells with coal, Lancashire, England, xxxiv, 26.
—, —, Cornwall, England, C. W. Peach, xlii, 327.
—, —, of the Ludlow rocks, xxx, 48; xxxviii, 90.
—, —, microscopic corallines and minute shells in white chalk, Lonsdale, xxxiii, 111.
*[Actæon levis], xl, 94.f
*— magnoplicatus, xl, 94.f
— parvus, xlii, 111.f
— trifidus, xxvi, 368.f