The Siouan thearchy was invoked and adored by means of forms and ceremonies, as well as through orisons. The set observances were highly elaborate; they comprised dancing and chanting, feasting and fasting, and in some cases sacrifice and torture, the shocking atrocities of the Mandan and Minitari rites being especially impressive. From these great collective devotions the ceremonials graded down through war-dance and hunting-feast to the terpsichorean grace extolled by Carver, and to individual fetich worship. In general the adoration expressed fear of the evil rather than love of the good—but this can hardly be regarded as a distinctive feature, much less a peculiar one. Some of the mystery places were especially distinctive and noteworthy. Foremost among them was the sacred pipestone quarry near Big Sioux river, whence the material for the wakanda calumet was obtained; another was the far-famed Minne-wakan of North Dakota, not inaptly translated "Devil’s lake;" a third was the mystery-rock or medicine-rock of the Mandan and Hidatsa near Yellowstone river; and there were many others of less importance. About all of these places picturesque legends and myths clustered. The Siouan mythology is especially instructive, partly because so well recorded, partly because it so clearly reflects the habits and customs of the tribesmen and thus gives an indirect reflection of a well-marked environment. As among so many peoples, the sun is a prominent element; the ice-monsters of the north and the rain-myths of the arid region are lacking, and are replaced by the frequent thunder and the trees shaken by the storm-winds; the mythic creatures are shaped in the image of the indigenous animals and birds; the myths center in the local rocks and waters; the mysterious thearchy corresponds with the tribal hierarchy, and the attributes ascribed to the deities are those characteristic of warriors and hunters. Considering the mythology in relation to the stages in development of mythologic philosophy, it appears that the dominant beliefs, such as those pertaining to the sun and the winds, represent a crude physitheism, while vestiges of hecastotheism crop out in the object-worship and place-worship of the leading tribes and in other features. At the same time well-marked zootheistic features are found in the mythic thunder-birds and in the more or less complete deification of various animals, in the exaltation of the horse into the rank of the mythic dog father, and in the animal forms of the water-monsters and earth-beings; and the living application of zootheism is found in the animal fetiches and totems. On the whole, it seems just to assign the Siouan mythology to the upper strata of zootheism, just verging on physitheism, with vestigial traces of hecastotheism. SOMATOLOGY