520 



PUEBLO POTTERY AND ZONI CULTURE-GROWTH. 



in conjunction with those of the latter region, seem to me to indicate 

 that tbe ceramic art has had independent centers of origin in America. 

 For the sake of convenience, I may name these types- the rectangular (see 

 Fig. 501) or Iroquois, and tbe bisymmetrical or kidney-shaped (see Fig. 

 5G2), of Nicaragua. The one is almost constant in the lake regions of the 

 United States, the other equally constant in sections of Central America, 

 In collections gathered from any tribe of our Algonquin or Iroquois 



Fig. 562.— Kidney-si 



Indians, one may observe vessels of the tough birch- or linden-bark, 

 some of which are spherical or hemispherical. To produce this form of 

 utensil from a single piece of bark, it is necessary to cut pieces out of 

 the margin and fold it. Each fold, when stitched together iu the shaping 

 of the \ essel, forms a corner at the upper part. (See Fig. 503.) These 

 corners and the borders which they form are decorated with short lines 



Fig. 5G3.— Iroquois bark-vessel. 



and combinations of lines, composed of coarse embroideries with dyed 

 porcupine quills. (See Fig. 504.) May not the bark vessel have given 

 rise to the rectangular type of pottery and its quill ornamentation to 

 the incised straight-line decorations"? (Compare Fig. 501.) 



So, too, in the unsym metrical urns of Central and Isthmean America, 

 which are characterized by the location of the aperture at the upper part 



