Tarnis, is, m.,
a river of Gaul falling into the Garonne , now the Tarn , Aus. in Mos. 465; Plin. 4, 19, 33, § 109; Sid. 24, 44.
TARNIS( Tarn), a river in Gallia, a branch of the Garonne. It rises near Mount Lozère, in the Cévenn...
Dictionary of Greek and Roman Geography