a mountain-chain of Spain, on the mutual confines of Castile and Galicia, to the east of the Sierra de Marabon, from which it is separated by the river Tuela. It is a continuation of the range which extends to the E., about 12 miles under the same name, and parallel to the Sierra Segundera. The Gamoneda is very well known from its immense elevation, and its entire mass is composed of loose heaps of stones and solid rocks, interspersed with seams of slate and other minerals, exactly similar to the Sierra de Segundera.