Lewis & Short

Ătax, ăcis, m., = Ἄταξ, a small river in Gallia Narbonensis, now Aude, Mel. 2, 5; Plin. 3, 4, 5, § 32; Luc. 1, 403; Sid. Carm. 9, 15; cf. Mann. Gall. p. 63.