an arrondissement of the department of the Dordogne, in France. It extends over 683 square miles, and comprehends ten cantons, divided into 133 communes, with 110,447 inhabitants. The capital is the city of the same name. It stands in a low situation, on every side surrounded with naked rocks. In the neighbourhood a great quantity of oil is expressed from nuts. It contained, in 1836, 5569 inhabitants. Long. 1° 9'. E. Lat. 45° 3'. N.