τά, Gal. 19.349, Hsch., etc.; gloss on οὖροι, Gloss. Hdt. ap. Stein Herodotus 2 p. 468; the sg. ὁροθέσιον (boundary) occurs in Petr. Patr. p. 433 D.
τά, die Grenzen selbst, VLL, die erkl. τὰ χωρίζοντα τὴν γῆν.