Map shows major trasnportation routes and major cities in the states of Mexico, the countries of Central America, and some portions of the Texas coast and the southeastern United States; railroad construction projects in Tehuantepec and Honduras in insets. Includes table of abbreviations with translations, legend, and tables lising major mountain peaks. Insets: "Tehuantepec Eisenbahn-project bearbeit von Barnard 1851" and "Honduras Eisenbahn-project bearbeit von E. G. Squier u. W. N. Jeffers 1853." Relief shown by hachures. Scale [1:6,000,000].