DIVISION OF MEXICO INTO STATES--EASTERN, WESTERN, INTERIOR. YUCATAN--BOUNDARIES, DEPARTMENTS, POPULATION, DISTRICTS, TOWNS, PARISHES, PRODUCTIONS, PRINCIPAL TOWNS, ISLANDS, HARBORS.--CHIAPAS--BOUNDARIES, PRODUCTS, DEPARTMENTS, TOWNS, RIVERS, POPULATION--REMAINS IN YUCATAN AND CHIAPAS.--DISCOVERIES OF STEPHENS, CATHERWOOD, NORMAN, ETC.--PALENQUE--UXMAL--YUCATAN CALENDAR.--YUCATAN, CHIAPAN, MECHOACAN, NICARAGUA AND MEXICAN MONTHS.--YUCATESE AND CHIAPAN CYCLE.--YUCATESE AND MEXICAN SOLAR YEAR--DIFFERENCES.--YUCATESE MONTHS.--TABASCO--BOUNDARIES, RIVERS, LAGUNE, INHABITANTS, PRODUCTIONS, TOWNS AND VILLAGES. In treating this branch of our subject we have followed the order adopted by Mühlenpfordt in his "Republik Mejico," and acknowledge the important assistance we have derived from the careful, minute and laborious personal researches made by that industrious German author relative to the geography of Mexico. Since the publication of his volumes, in which he had been greatly aided by the previous works of Humboldt, Ward, Burkhardt and other explorers during the present century, the Mexican government has organized a Statistical Commission, whose investigations have been published in a series of Bulletins, and to these we are indebted for recent authentic information about some of the most interesting portions of Mexico. The northern regions, meanwhile, have been illustrated by the explorations of Frémont, Abert, Emory, Wislizenius, Cooke, Simpson, and other officers of the American Government; but as most of the territory examined by them has become the property of the United States by the Treaty of Guadalupe, their labors are not of importance in describing the Republic of Mexico as at present bounded. In the last Book of this work, however, which we have devoted to the consideration of California and New Mexico, we shall recur to those brave and scientific explorers of a remote region, so recently a wilderness, but which their labors, and the combined fortune of war and mineral wealth have subdued for the benefit of mankind. In accordance with the plan proposed in the separate consideration of the several States and Territories of Mexico, we shall divide them into three groups:--those on the eastern or Gulf coast; those on the western or Pacific coast, and those in the interior. I.--EASTERN OR GULF COAST. The State of Yucatan. The State of Vera Cruz. " State of Chiapas. " State of Tamaulipas. " State of Tabasco. II.--WESTERN OR PACIFIC COAST. The State of Oajaca. The State of Jalisco. " State of Puebla. " Territory of Colima. " Territory of Tlascala. " State of Sinaloa. " State of Mexico and Federal " State of Sonora. District. " State of Guerrero. The State of Michoacan. " Territory of L. California. III.--INTERIOR.