The ArcisPaul Raymond, Dictionnaire topographique du département des Basses-Pyrénées, Paris, Imprimerie Impériale, 1863, or Larcis (with article agglutination; ) is a river in Southwestern France. It is a right tributary of the Léez, originating in the commune Luc-Armau in the east of the Pyrénées-Atlantiques. It joins the Léez in Lannux, in the French département of the Gers. It is long.
Name The name is documented as Arsiis (1540), Arciis (1542), Arcis (1863). The name of the Arcison, a left tributary of the Layon, is related.
Main tributaries (L) Lizo, (L) Léès, from Saubole.
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