So far as the coloring is concerned they are of two kinds, those having the figures wholly black, and those which are partly black and partly brown or red. The differences in the decorated pottery appear to be always accompanied by certain other variations sufficient to warrant speaking of them as different varieties or groups. The former (those having the figures wholly black), which are made of the ordinary plastic blue clay, have only the upper half or two-thirds of the body of the vessel overlaid with the white coating for receiving the decorations, the lower part being uncoated, and of the natural pale red or salmon color produced by burning, but usually well polished. As additional distinguishing features of this group we notice that the shape is more generally globular, the workmanship rather superior, and the pottery somewhat harder and less friable than that of the other group; the angular and geometrical figures formed by straight lines are more common in this group; here we also find the meander or Greek fret correctly drawn, the vine, and several other designs rarely or never found in the other group. The figures of animals, which are common to both varieties, are in the former more usually distributed in zones or groups, while in the latter they are generally placed singly in inclosed spaces. The latter variety, in which we see the curve freely used, shows an evident advance over the ornamentation of the older pottery of this region; and while the figures must be classed as rude, and the outlines are less sharp, and not so well defined as in the older specimens, yet they indicate clearly a mental advance in the greater variety of conception. The figures of this entire class, as regards forms, may be grouped under three general headings: first, the geometrical, which is the most common; second, the figures of animals; and, third, rude attempts at floral decorations, which forms are rather rare. Strange to say, in but few instances can any attempt at representing the human form or any part of it be discovered in these color decorations. The geometric figures present an endless variety; but we notice, as is shown by the cuts and plates, that triangles with an elongate acuminate apex and the zigzag are very common in the black-brown decorations. The checkered figure also is not uncommon. The animals most frequently represented are the elk or deer and birds. The floral decorations are chiefly vines well drawn, and rude attempts at representing trees, and the flowers of various species of _Helianthus_. 5. _Red ware with color decorations_. This ware is represented by but few vessels, which are in every respect similar to the best variety of the red pottery heretofore mentioned, except that it is marked with figures in black, many of which are decorated only on the upper portions around the neck or rim. 6. _The ancient pottery_, of which Figs. 680 (40816) and 693 (40817) are good examples.