Map shows provinces or states in Mexico, cities, deserts, mining activities, and Texas. Includes observational notes directly on map. Inset: "Territory and Isthmus of Tehuantepec." Relief shown by hachures. Scale [ca. 1:8,390,000].

Map shows islands and bays along the coast of the Gulf of Mexico from just south of the Rio Grande to the tip of Florida, Key West, and the Dry Tortugas; temperature readings east and south of the Mississippi River delta on inset map. Insets: [fifteen profiles of sections of seabottom for the Gulf of Mexico along lines shown on the main map]. Depths shown by soundings and by profile. Scale [ca. 1:2,400,000].