The Collaborative International Dictionary of English v.0.48:

Kent bugle \Kent" bu"gle\prop. n. [Probably named after a Duke
   of Kent.] (Mus.)
   A curved bugle, having six finger keys or stops, by means of
   which the performer can play upon every key in the musical
   scale; -- called also keyed bugle, and key bugle.
   --Moore.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Bugle \Bu"gle\, n. [See Bugle a wild ox.]
   1. A horn used by hunters.
      [1913 Webster]

   2. (Mus.) A copper instrument of the horn quality of tone,
      shorter and more conical that the trumpet, sometimes
      keyed; formerly much used in military bands, very rarely
      in the orchestra; now superseded by the cornet; -- called
      also the Kent bugle.
      [1913 Webster]