7th. The Rio de San Juan. The sources of this river lie partly in the metallic mountains of Ixtlan, in the state of Oajaca, and partly in the neighborhood of Tehuacan de las Granadas. Many large, but wild streams, spring up in these mountain regions, and form the broad but shallow Rio Grande de Quiotepec. This river, after winding through the valley of Cuicatlan, receives, from the south, the large stream of Las Vueltas; and all these unite to form the Rio de San Juan, which pursues its eastern course until it approaches the coast near Alvarado, when it divides into two arms. One of these, named Tecomate, joining the Cosomaloapan and Paso, form the large lagunes of Tequiapa and Embarcadéro,—whilst the other arm, by a different course, also debouches in the same lagunes.
8th. The Rio de Guasacualco, rises at about 16° 58´ of north latitude, and 96° 19´ west longitude, from Paris, in the mountains of Tarifa, and pours onward towards the east, receiving accessions from a great number of small mountain