Of the 15 gods of the codices classified by Schellhas five may be recognized in this area with a fair degree of certainty. God A, the god of death, in the form of a human skull, decorates the outside of not a few small pottery vessels, and is depicted upon the painted stucco wall at Santa Rita. God B, the long-nosed god, is usually identified with Cuculcan. Representations of this god are found throughout the whole area in great abundance, painted upon pottery and stucco, incised on bone and stone, and modeled in clay. This god is associated with the cities of Chichen Itza and Mayapan, and is supposed to have entered Yucatan from the west; indeed it is possible that he may originally have been the leader of one of the Maya immigrations from that direction. He appears to have been by far the most popular and generally worshiped deity in this area, and it is his image which is found on nearly half of all the incense burners discovered. God D, probably Itzamna, appears in the codices as an old man with a Roman nose, shrunken cheeks, toothless jaws, and a peculiar scroll-like ornament beneath the eye, to the lower border of which are attached two or three small circles. In some representations a single tooth projects from the upper jaw, and in a few the face is bearded. This god is not infrequently found associated with the serpent. A typical representation of him is seen upon the Santa Rita temple wall;[19] here he is depicted standing upon intertwined serpents, holding in his right hand a feather-plumed serpent. This god is represented upon some incense burners, and is found not infrequently associated with Cuculcan. God K, the god with an elaborate foliated nose, often closely associated with God B, his face in some cases forming the headdress ornament of the latter god, is unmistakably depicted upon the Santa Rita temple wall.[20] God P, the Frog god, is found on some small pottery vases, and on a few incense burners. Nothing found in the mounds proves definitely the practice of human sacrifice in this area, but that it existed is almost certain, as Villagutierre refers to it as prevalent among the Itza of Peten at the time of their conquest,[21] at the end of the seventeenth century, and Landa mentions it as occurring among the Maya at the time of the coming of the Spaniards.[22] Near the headwaters of the Rio Hondo a mound was opened, which contained, in a stone-walled chamber, a number of human skulls unaccompanied by other bones. It is possible that these may have been the remains of sacrificial victims, as it was customary to remove the head of the victim after death, which became the perquisite of the priests.