It would seem to be a difficult matter in archaeology to get rid once for all of an erroneous idea which has firmly asserted itself; at any rate it is desirable when an error has been combated without complete success, to adduce any fresh proofs of the truth that may occur. For this reason I venture to reintroduce a question which, as many will doubtless think, has really been finally settled, I mean the distinction which, to the Greek mind at any rate, existed between the Siren and the Harpy. These two mythological creations were to the Greeks as regards outward form as widely distinct as possible; the Siren has in Greek art the form of a bird with human head, or human bust and arms; the Harpy has invariably the winged figure of a woman, with no other distinguishing feature, unless it be that in one instance her hands are drawn in a method suggestive of claws. And yet we hear it constantly asserted that the Harpy has sometimes in Greek art the body of a bird, like a Siren; and when a figure occurs which has a bird's body with the upper part of a woman's body, this is still described, as in the old catalogues, as ‘a Siren or Harpy.’
The error has arisen principally owing to the fact that in the later monuments and literary notices the type of the Harpies became assimilated to that of the Sirens.