). A flat felt hat, with a broad and round brim,
usually worn among the Thessalians. The brim is often parted into four bowshaped indentations.
It is said to have been introduced into Greece along with the chlamys
Petasi. (Pompeian Painting.)
as a distinguishing mark of the ephebi.
Hermes is usually
represented with the winged petasus. The Romans wore a similar hat in the country, and when
travelling; in the city it was generally used only in the theatre, as a protection from the
sun (Suet. Aug. 82
). See Pilleus