TRENTON.

POWHATAN.

Old-fashioned wooden paddle-wheel frigate.

ASHUELOT. MONOCACY.

Iron, paddle-wheel, double-ender corvettes. These vessels were originally provided with a rudder at each end, but the forward one is removed. They can carry in addition to their present armament one 11-inch pivot forward and one 11-inch pivot aft. Musket-proof pilot-house on the hurricane-deck.

ASHUELOT.

MICHIGAN.

Old-fashioned iron, paddle-wheel gun-boat carrying a battery of boat-guns.