Chthamalus, cretacean species of, [305].
Circumstances favourable to selection of domestic products, [40].
—— —— to natural selection, [102].
Cirripedes capable of crossing, [101].
——, carapace aborted, [148].
——, their ovigerous frena, [192].
——, fossil, [304].
——, larvæ of, [440].
Classification, [413].
Clift, Mr., on the succession of types, [339].