Concentric circles are not often met with, neither is the plain or loop coil often found, owing to the difficulty of
WAVE PATTERNS. execution; but the wave pattern and double wave are typical Ainu patterns; also the reversed wave.
From these may have been derived the
REVERSED COIL. other two, the last of which is a mere double reversed coil.
Triangular marks are occasionally
FRETS. "put in" by the Ainu in some of their more complicated designs, and finally we find that, though rarely, they sometimes attempt a kind of fret.
Other strange forms of lines which are thoroughly characteristic of the Ainu are the following.