Figs. 21 to 23.—Straight-lined ornaments.

An effective disc border, like that made by savage tribes from cut shells, is shown at [Fig. 33], and a development of the latter is that of Fig. 34, taken

Figs. 24. 25.—Spiral and Scroll.

from Assyrian tesseræ, small oblong pieces of stone or metal, on which the pattern was incised, and often alternating with the guilloche (Figs. [37], [38], [39], and [40]). The guilloche was an important pattern in Assyrian work, in Greek moulding decoration, and in their flat painted ornament.

Fig. 26. A, B, C, D, E.—Scale-work (imbricated).