KIDDER-GUERNSEY] ARCHEOLOGICAL EXPLORATIONS IN ARJZONA 141 
PLAIN YELLOW WARE: This is made of the same paste that forms 
the base of the three preceding classes, but it is entirely unslipped. 
Pieces of the ware might therefore be considered as unfinished red 
or polychrome vessels, fired before slipping were it not for the fact 
that they are only found, so far as we ‘ aow at present, in Sagi 
Canyon and Marsh Pass. The fragments collected by us in the latter 
locality are of bowls, ladles, and ollas. The bowls are small and 
deep, have direct rims and single vertically placed handles; a few 
of them bear one or two lines of dark-brown paint encircling the 
interior just below the rim. The ladles are ‘“ bowl-and-handle ” type; 
nothing definite can be made out as to the shape of the ollas. 
CORRUGATED WARE 
Trcuno.oey: The paste of the corrugated vessels is uniformly dull 
gray; it is coarse; naturally granular, and contains a heavy ad- ° 
mixture of tempering material in the form of angular bits of broken 
(apparently pounded up) rock. The corrugations, which are the 
original structural coils left unsmoothed on the exterior, vary greatly 
in size and in the amount of care which was taken to adapt them to 
ornamental purposes. Examples such as those shown in plate 57, h-p, 
inclusive, are as fine specimens of coiling as may be found anywhere 
in the Southwest; others (as pl. 57, d) are of very crude and careless 
workmanship; in some cases the coil has been almost completely re- 
moved (pls. 57, a; 58, ¢). 
We have noticed, though we have not accumulated enough data 
to enable us to make a positive statement, that the finest corrugated 
ware seems to be associated with the more generalized styles of black- 
and-white pottery (“ ght” class) and redware (red with dull paint) ; 
and that there appears to be a decided degeneration of the technique 
in pieces found at sites producing a majority of the highly specialized 
styles (“heavy ” black-and-white and polychrome red). This evi- 
dence of a decline in the art of coiling in what we take to be the later 
stages of the Kayenta culture leads us to present a few speculations 
on ornamentally coiled pottery in general. 
The theory was brought forward by Cushing many years ago? 
that corrugated ware was the earliest form of southwestern pottery 
and that it was a direct imitation of coiled basketry, the rope of clay 
taking the place, in the ceramic art, of the fiber bundle which makes 
the basis or foundation of coiled basketry. This has always seemed 
doubtful to the authors, for the following reasons. Corrugated 
pottery is built up by winding round and round on’ itself a long, 
thin fillet of clay which, in well-made pieces, is continuous from its 
beginning at the bottom of the vessel to its termination at the rim; 
1 Cushing, 1886. 
