“Everywhere on the surface of this stone are noticed symbols, birds, quadrupeds, fantastic reptiles, signs of the sun, days, months, and a quantity of objects whose character is imitated in manuscripts and rituals. There can be no doubt that we are in the presence of a monument devoted to the gods and bearing legends relative to their worship. M. the minister of Fomento, D. Vicente Rivera Palacio, in 1877 made several attempts at excavation in the Plaza Mayor of Mexico, to recover this important monument, but all search remained unfruitful.” This stone is supposed to be buried beneath the Place d’Armes at Mexico. Mexican petroglyphs are also discussed and figured by Chavero (_a_). It would seem from these and other descriptions of and allusions to petroglyphs in Mexico, that at the time of the Spanish conquest they were extant in large numbers, though now seldom found. Perhaps the Spaniards destroyed them in the same spirit which led them to burn up many of the Mexican pictographs on paper and other substances. A number of illustrations of the Mexican pictographic writings are given below under various headings. SECTION 4. WEST INDIES. The valuable paper of A. L. Pinart (_a_), giving a description of the petroglyphs found by him in the Greater and Lesser Antilles, is received too late for reproduction of the illustrations. He explored a number of the groups of the West Indies with varying success, but found that the island of Puerto Rico was the one which now furnishes the greatest amount of evidence of development in the pictographic art. His marks translated with condensation appear below. PUERTO RICO.