According to Scylax of Caryanda, they did not extend as far west as the Sangarius, for according to him the river Hypius formed the boundary between the Bithyni and Mariandyni.
Menurut Skylax dari Karyanda, mereka tidak meluas sejauh barat Sangarios, karena menurut dia sungai Hypius membentuk batas antara Bitini dan Mariandini.