an arrondissement of the department of the Lower Pyrenees, in France, 511 square miles in extent. It comprehends six cantons, divided into 147 communes, and contains 66,400 inhabitants. The capital is the city of the same name situated on the Gave de Saizan. It contains only 1130 inhabitants, who chiefly depend on the cultivation of vineyards. Long. 0.59. W. Lat. 43.12. N.