The Klingon Battlecruiser, the main ship seen in the original series, has a teardrop-shaped front section extended on a thin neck from the bulk of the ship.
The later Bird of Prey was a smaller version of the Battlecruiser with some modifications.
The other significant alien race in the original Star Trek, the Romulans, used the same basic design as the Klingon Battlecruiser.
But the fleet also included two semidreadnoughts (" Lord Nelson," " Agamemnon "), the battlecruiser " Inflexible " and the newly completed " Queen Elizabeth," 1 On the naval operations, see also the article Naval History Of The War.