​ARENALES, José (ah-reh-nah'-les), Argentine geographer, b. in Buenos Ayres about 1790. He entered the army when quite young, was promoted to the rank of lieutenant-colonel of artillery about 1825, and in 1833 took charge of the topographical department of Buenos Ayres, and then travelled through almost every portion of South America. His highly interesting report of some of these travels was published under the title of “Noticias historicas y descriptivas sobre el gran pais del Chaco y Río Bermejo, con observaciones relativas a un plan de navegación y de colonización.”