It courses onward through a varying and rough channel among the mountains and plains, until it is lost in the lagunes near Alvarado.
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 streams and rivulets, until it falls into the Gulf of Mexico.
9th. The Rio de Tabasco, or Rio de Grijalva, or Rio Guichula, rises in the mountains of Cuchumatlanes towards the centre of Guatemala, and falls into the gulf at the port of Tabasco.
10th. The Rio de Usumasinta, rises also in Guatemala, and debouches in the Laguna de Terminos.
| II. Small Eastern Coast Streams. | |
| Rio Garces. | Rio Antigua. |
| Rio de Tuspan. | Rio de Jamapa or Medellin |
| Rio de Cazones. | Rio Aquivilco. |
| Rio de Tenistepec. | Rio de Tonala. |
| Rio de Jajalpam, or Tecolutla. | Rio de Santa Anna. |
| Rio de Nautla. | Rio de Capilco. |
| Rio de Tlapacoyan. | Rio de dos Bocas. |
| Rio de Palmar. | Rio de Chiltepec. |
| Rio de Mizantla. | Rio de Saboja. |
| Rio de Maguilmanapa. | Rio de Champotom. |
| Rio de Yeguascalco. | Rio de Chen. |
| Rio de Actopan. | Rio de Escatallo. |
| Rio de Chuchalaca. | Rio de San Francisco |
| Rio de San Angel. | Rio de Silan. |
| Rio de San Carlos. | Rio Cedros |
