This mound was probably of a much later date than the other mounds described at Santa Rita. It is merely an irregular ridge built of earth and stones, while the earlier mounds just referred to are well defined and constructed of blocks of limestone with rubble, limestone dust, and mortar filling in the interstices. The bones, though placed under the most unfavorable conditions, having been in direct contact with the damp earth, are in an excellent state of preservation, far better, indeed, than even the best preserved of those in the other mounds where the conditions are decidedly more favorable. The skeletons of children are practically never found in the other mounds, as the bones have long since disappeared completely, while here we find the bones of a child under 12 years of age in a fairly good state of preservation. There are a number of those sepulchral ridges at Santa Rita, many of them hardly distinguishable from the surrounding soil; they are all seemingly of much more recent date than the other mounds, and are probably the work of Maya Indian tribes who flourished long after the conquest. [Illustration: FIG. 22.--Diagram of Mound No. 6.] MOUND NO. 6 Mound No. 6 was situated near the southwestern boundary of Santa Rita. The mound was nearly circular, with flattened top, 25 yards in diameter, and 10 feet high at its highest point. Toward the southern side of the mound was unearthed a wall (fig. 22, A) 2 feet thick, 2 feet high, and about 15 yards long. From the ends of the wall roughly made masses of limestone and mortar (fig. 22, BB) passed almost through the mound, inclosing a rectangular space, C. The wall was evidently the remains of an older structure, as it was built of well-squared stones and had been broken down at both the top and sides. The masses of masonry (fig. 22, BB) were 5 to 6 feet thick by about 5 feet high. The space C was filled with alternating layers of mortar and small rubble. The spaces (fig. 22, FFF) at the periphery of the mound were filled with rubble mixed with earth. [Illustration: PLATE 12 METATES AND BRAZOS FROM MOUND NO. 6] [Illustration: PLATE 13 a. SMALL POTTERY SEAL b. BOWL IN WHICH SKULL WAS FOUND c. SKULL Length, 15.9 cm.; breadth, 15.9 cm.; height, 13.3 cm.; circumference, 47.9 cm.]