FEWKES] FOOD-BOWL DECORATIONS 715 
shown a combination of rectangular and triangular figures with three 
tapering points and circles with lines at their tips radiating instead of 
parallel. Another modification is shown in figure 310 in which the 
Fia. 312—Double key 
triangle predominates, and figure 311 evidently represents one-half of 
a similar device with modifications. 
One of the most common designs on ancient pottery is the stepped 
¥ia. 313—Triangular terrace 
figure, a rectangular ornamentation, modifications of which are shown 
in figures 312-314. This is a very common design ou the interior of 
food vessels, where it is commonly interpreted as a rain-cloud symbol. 
Of all patterns on ancient Tusayan ware, that of the terrace figures 
Fie. 314—Crook, serrate end 
most closely resemble the geometrical ornamentation of cliff-house pot- 
tery, and there seems every reason to suppose that this form of design 
admits of a like interpretation. The evolution of this pattern from 
plaited basketry has been ably discussed by Holmes and Nordenskiold, 
