In Etnologiska Studier 8, 1939, Helen Palmatary analyzes former Tapajó pottery from Santarem, Brazil. On pages 122–123, she gives a tabulated list of thirty-five structural and stylistic pottery traits from eleven South and North American areas. These areas, she says, are “generalized somewhat,” and they are not defined. Her symbols in the table are 3, 2, 1 for frequent, less frequent, rare; p for probably present; a for probably absent; n for no data.