BOAS] SUMMARY AND CONCLUSION 383 
as acorns, while the Thompson depict the beaver, snowshoe, animal 
traps, dentalia, moss cake, etc. The Thompson represent a far 
greater variety of artificial and natural objects than do any of the 
Californian tribes. 
That there is no well-defined symbolism among the Thompson must 
have been apparent in what has already been said. A few geometric 
patterns, like the arrowhead, generally receive the same interpreta- 
tion by all the people. Aside from these, practically all geometric 
figures represent a variety of objects, while these in turn are often de- 
picted by more than one geometric form, but it all depends on some 
similarity between object and design which is recognized at the time 
by the person interpreting. There is no color symbolism except 
in the case of rain or snow and even realism in color is often entirely 
disregarded. 
I” add a few general considerations to the summary and conclu- 
sions written by Miss Roberts. 
The area in which imbricated basketry is made will be seen on the 
accompanying map. It stretches along the eastern side of the 
Cascade Range, beginning with the Chilcotin and following south 
through the territory of the Thompson as far as Wenatchi and 
Cowlitz. 
The map shows that important changes of location have occurred 
in the whole area since the year 1800 or a little before that time. 
The Klickitat, who at present participate in the making of imbricated 
basketry, lived at that time south of the Columbia River. Mr. 
Teit obtained his information repeatedly from the tribes on the 
middle Columbia River, particularly from the Columbia, a subdivision 
of the Salish. It is remarkable that according to Melville Jacobs 
the Taitnapam, who live on the upper region of the Cowlitz River 
west of the Cascades and who are part of the Yakima (that is, Klicki- 
tat), claim that they have always held the region which they inhabit 
at the present time. The claims of the interior Salish in regard to 
the migrations of the Yakima and Klickitat are borne out by lin- 
guistic evidence. The Cowlitz and the upper Chehalis, who are 
neighbors, speak practically the same dialect. The vocabulary and 
grammatical structure are very much alike. The only fundamental 
difference between the two dialects is that where the Cowlitz use a 
k the Upper Chehalis use tc. In this respect the latter agree with all 
the other coast dialects as far north as Comox. All the dialects of the 
interior as far east as Spokane and Kalispel use the k forms, while 
farther to the east the tec forms are found. On the map the area 
in which the & forms are used is indicated by a stipple band. The 
use of the k forms by the Cowlitz can be understood only on the 
basis of an intimate relation between them and their eastern neigh- 
7’ By Franz Boas. 
