animal's jaws are colored blue; the nose, mouth, and chin, white. [Illustration: FIG. 18.--Clay alligator found in Mound No. 2.] This is by far the largest and most carefully modeled of the pottery figurines found at Santa Rita, the smallest detail having received careful attention, and the scales, claws, and teeth being separately and accurately formed.[30] The fourth and deepest layer was 2-1/2 feet in thickness, and was built of blocks of limestone, each weighing from 50 to 200 pounds, roughly fitted together, without clay or mortar to fill in the crevices. Scattered all through this layer were great numbers of fragments of pottery censers decorated externally with human figures; nearly 150 pounds of these were taken from it, representing probably 20 incense burners. The whole of the pottery when first found was exceedingly brittle, but hardened in a few hours on being exposed to the air and sun. At the bottom of this layer, and resting on the ground, were found a number of pieces of black porous material with a peculiar odor. The bottom of a large round pot, 10 inches in diameter, was also found full of the same substance, which is probably a mixture of copal gum with various aromatic substances, which had been used as incense and partially charred at the bottom of the incense burner. Fragments of the bottoms of round pots were found scattered about on the ground level, many of them having bits of this charred incense still adhering to them. The mound appears to have been constructed in the following manner: First, a number of pieces of burning incense and round jars containing the same substance were strewn thickly over an area approximately 40 yards in circumference; next a foundation or platform 2-1/2 feet in height was formed by placing together a number of large rough blocks of limestone, among which were scattered the fragments of about 20 incense burners, decorated outside with human figures in high relief. Over this was plastered a layer of mortar 18 inches to 2 feet in thickness in which was embedded the alligator seen in figure 18. Fires were lighted on top of this mortar till its upper layers were discolored, and into the fire while still burning were thrown fragments of two clay images, two small oval vases, and a number of beads. Over the ashes and charcoal left by the fires earth and blocks of limestone were heaped to a height of 18 inches, and in this layer was buried the stone turtle already referred to; finally on top of the earth layer was placed a conch-shell trumpet. MOUND NO. 3