: FIG. 301--Rectangular reversed S-form]

[Illustration: FIG. 302--Rectangular S-form with crooks]

Figures 301 and 302 are even simpler than the design shown in figure
300, with appended square key patterns, all preserving rectangular
forms and destitute of all others. They are of S-form, and differ more
especially in the character of their appendages.

[Illustration: FIG. 303--Rectangular S-form with triangles]

[Illustration: FIG. 304--Rectangular S-form with terraced triangles]

While the same rectangular idea predominates in figure 303, it is
worked out with the introduction of triangles and quadrilateral
designs. This fairly compound pattern, however, is still classified
among rectangular forms. A combination of rectangular and triangular
geometric designs, in which, however, the former predominate, is shown
in figure 304, which can readily be reduced to certain of those forms
already mentioned. The triangles appear to be subordinated to the
rectangles, and even they are fringed on their longer sides with
terraced forms. It may be said that there are but two elements
involved, the rectangle and the triangle.

[Illustration: FIG. 305--S-form with interdigitating spurs]

The decoration in figure 305 consists of rectangular and triangular
figures, the latter so closely approximated as to leave zigzag lines
in white. These lines are simply highly modified breaks in bands which
join in other designs, and lead by comparison to the so-called "line
of life" which many of these figures illustrate.

[Illustration: FIG. 306--Square with rectangles and parallel lines]

[Illustration: FIG. 307--Rectangles, triangles, stars, and feathers]

The distinctive feature of figure 306 is the square, with rectangular
designs appended to diagonally opposite angles and small triangles at
intermediate corners. These designs have a distant resemblance to
figures later referred to as highly conventionalized birds, although
they may be merely simple geometrical patterns which have lost their
symbolic meaning.

[Illustration: FIG. 308--Crook, feathers, and parallel lines]

Figure 307 shows a complicated design, introducing at least two
elements in addition to rectangles and triangles. One of these is a
curved crook etched on a black ground. In no other exterior decoration
have curved lines been found except in the form of circles, and it is
worthy of note how large a proportion of the figures are drawn in
straight lines. The circu