Armored belt and double-decked casemate, ram bow, and overhanging stern. The forward part of the belt is carried down in a curve over the ram. The side forward from the gun-deck beams up is carried well back parallel to the keel to give fore-and-aft fire. There is no stern-fire from the main-deck casemate. The after bulkhead rises straight from the belt to the top of the upper casemate. This casemate is, however, shorter than the lower one, and its forward bulkhead being carried down separates the main-deck casemate into two chambers, forming a double protection for the after-guns. The corners of both casemates are cut off for angular ports to give fore-and-aft and beam fire. The hull is divided longitudinally by an armored bulkhead rising to the height of the main-deck beams, one set of engines and boilers being in each compartment. Twin screws and full sail-power. [Illustration: ALEXANDRA.] TEMERAIRE. Armored belt, redoubt, and two barbette turrets. Ram bow. The armored belt is carried down in a curve over the ram. No stern-fire from the casemate, the forward corners being cut for angular ports, and the side forward being carried back for bow-fire. The casemate is cut in two chambers similar to the main-deck casemate of the Alexandra. The barbette turrets forward and abaft the casemate are oval in shape, and the guns are mounted on Moncrieff carriages. The armor of the body of the turrets does not come below the spar-deck beams, but an armored shaft is carried down to the level of the belt, through which ammunition is passed and communication given. The hull is divided longitudinally by an armored bulkhead similar to the Alexandra. Twin screws and auxiliary sail-power. (Brig rigged.) [Illustration: TEMERAIRE.] SHANNON. [Illustration: SHANNON.] Partial armored belt and partial spar-deck breastwork. The belt is carried around the stern as a protection to the steering-gear, but ends just abaft the fore-mast in an armored bulkhead, which rises sheer to the height of the spar-deck rail. From the foot of this bulkhead an iron deck is carried forward to the stem, ending as a support to the ram. A breastwork on the spar-deck forward forms a protection for the bow-guns, the topgallant forecastle being carried to its after-edge. The corners of the breastwork are cut for angular ports, and the rail forward is carried back parallel to the keel. The rail aft is recessed and cut back for after angular ports, but the guns are not protected by armor. An armored conning tower is placed at the forward part of the breastwork. A single gun is used aft, working on a turn-table for shifting from one port to the other. NELSON. NORTHAMPTON.