[47] F. W. Putnam, Rep. upon U. S. Geogr. Surveys, l. c., p. 30; Schumacher, Smithson. Rep., 1874, p. 341.
[48] Smithson. Rep., 1874, p. 342.
[49] Putnam, l. c., p. 22; Schumacher, Smithson. Reports, 1874, p. 350.
[50] Yarrow, Introduction to the Study of Mortuary Customs among the North American Indians, 1880, p. 54.
[51] Schoolcraft, Archives of Aboriginal Knowledge, 1860, IV, p. 156.
[52] Yarrow, l. c., p. 71.
[53] Bulletin l. c., p. 34.
[54] Art in Shell, pl. XXXII, fig. 2.
[55] W. H. Dall, for instance, found them among other places in shellmounds on the Aleutian Islands (Smithson. Contrib., 1878, No. 318, pl. 10, No. 17261.)