KIDDER—GUERNSEY | ARCHEOLOGICAL EXPLORATIONS IN ARIZONA 49 
a few potsherds. Rooms 14 and 15, lying outside the terrace wall 
and only partly protected from the weather, have been almost entirely 
destroyed; they contained in their rear portions small deposits of 
rubbish. 
The most interesting feature of Olla House is the kiva (pl. 14). It 
is excellently preserved, the walls standing from 6 to 7 feet high all 
around. As usual, it occupies a position well toward the front, is 
sunk in the cave deposit as deeply as possible, and was furthermore 
banked about with débris of construction and of occupancy. The 
‘upper two or three feet probably stood clear, the building having 
thus been only semisubterranean. The room is an almost perfect 
circle, the average diameter being 11 feet 4 inches (fig. 21). A niche, 
AEA 
SQA 
\ ad 
UIQ G9 : - \ 
DSW SRO ROS \ 
‘ RN oon WY 
Fig. 21.—Plan and section of kiva, Ruin 7. 
3 feet 2 inches above the floor and 1 foot 4 inches deep, extends 
nearly halfway around the room on the eastern side. The ven- 
tilator opens 3 inches above the floor level; the horizontal passage is 
4 feet long, paved with sandstone slabs and roofed with cedar rods 
set in the masonry on either side; above the rods are more slabs. 
The stonework about the inner end of the horizontal passage is care- 
fully done; toward the outer end it is heavy and coarse. The vertical 
shaft has completely fallen away, but one side of it, the farthest from 
90521°—19—Bull. 65 4 
