Dictionary of Greek and Roman Geography/Catorissium
CATORI′SSIUM, is placed in the Table on a road from Vienna (Vienne), in Gallia Narbonensis, through Cularo (Grenoble) to the Alpis Cottia (Mont Genèvre). It is xii M. P. from Cularo on the route to the Alpis Cottia. Walckenaer places Catorissium at Petit Col d'Ornon et Quarele. [ G. L. ]