DEERSTALKER - Sportsman's tweed, or cloth, cap with visors in front and back and earflaps outside and tied on top. Crown lined with scarlet poplin and reversible. As worn by deer hunters. Also SHERLOCK HOLMES CAP, FORE AND AFT, DUCKHUNTERS.

DERBY ( der bi ) - ( British, dar bi ) In 1888, the 12th Earl of Derby visited the United States wearing a stiff, hard, brown felt hat that had dome-shaped crown and a narrow, a slightly curled brim. This set a fashion named after him. Also BILLYCOCK, BOWLER, CLOCKER, COKES.

DISCO HAT - ( Late 1970's ) A small hat worn above the forehead and tilted to one side, held on by an elastic or ribbon band in back. The discotheque was a popular place to observe fashion trends.

DOLL HAT - Name given to small hats in various styles and materials. Usually worn forward and tilted above the right eye. In 18c. England, a feminine version of the MACARONI. In 1930, a hat designed by Schiaparelli. Frank Olive brought out a version in 1979.

DORMEUSE - ( French for "sleeper" ) In 1770's, a cap of shirred lawn worn at night, with plaited ribbon, held on by a ribbon tied on top of the head. For daytime wear, the DORMEUSE BONNET came in many designs.

DUCKBILL - Bonnet having a long, high, curving visor. Usually tied on with ribbon under the chin. Worn by Marveluese of French Directoire Period ( 1795, dee rek twar ). Also JOCKEY CAP, DIRECTOIRE BONNET.

DUTCH CAP - Close fitting, pointed crown, cap with brim rolling up and flaring out at the sides. Dutch woman's cap of lace or muslin. Also VOLENDAM CAP.