Mobiles autem sunt, qui in tetrachordo inter inmotos dispositi in generibus ex locis loca mutant; vocabula autem habent haec: parhypate hypaton, lichanos hypaton, parhypate meson, lichanos meson, trite synhemmenon, , trite diezugmenon, paranete diezeugmenon, trite hyperbolaeon, paranete hyperbolaeon.