Ossicles-The three small bones of the middle ear: the malleus (hammer), the incus (anvil) and the stapes (stirrup).
16), extending between the fenestra ovalis and the tympanic membrane or drum, consists of (I) the long and slen der columella, a straight, ossified rod which fits with a disk into the fenestra r; t st ovalis; it is homologous with the stapes (m.st.), although not stirrupshaped; (2) the extra-columellar mass.
Parker.) extracolumellar mass, that between stapes and drum, is equivalent to incus and malleus of the mammalia.