An extensive linguistic group of tribes in Brazil, on and north of the Amazon, extending as far as the Orinoco, has been called the Guck, or Coco group. "There is no common name for the group, that here used meaning a father's brother, a very important personage in these tribes. The Guck group embraces a large number of tribes. ... We need enumerate but few. The Cuyriri or Kiriri (also known as Sabaja, Pimenteiras, etc.), number about 3,000. Some of them are half civilized, some are wild, and, without restraint, wander about, especially in the mountains in the Province of Pernambuco. The Araicu live on the lower Amazon and the Tocantins. Next come the Manaos, who have a prospect of maintaining themselves longer than most tribes. With them is connected the legend of the golden lord who washed the gold dust from his limbs in a lake [see EL DORADO]. ... The Uirina, Baré, and Cariay live on the Rio Negro, the Cunimaré on the Jurua, the Maranha on the Jutay. Whether the Chamicoco on the right bank of the Paraguay, belong to the Guck is uncertain. Among the tribes which, though very much mixed, are still to be enumerated with the Guck, are the Tecuna and the Passé. In language the Tecunas show many similarities to the Ges; they live on the western borders of Brazil, and extend in Equador to the Pastaça. Among them occur peculiar masques which strongly recall those found on the northwest coast of North America. ... In the same district belong the Uaupe, who are noticeable from the fact that they live in barracks, indeed the only tribe in South America in which this custom appears. The communistic houses of the Uaupe are called 'malloca;' they are buildings of about 120 feet long, 75 feet wide, and 30 high, in which live a band of about 100 persons in 12 families, each of the latter, however, in its own room. ... Finally, complex tribes of the most different nationality are comprehended under names which indicate only a common way of life, but are also incorrectly used as ethnographic names. These are Caripuna, Mura, and Miranha, all of whom live in the neighborhood of the Madeira River. Of the Caripuna or Jaûn-Avô (both terms signify 'watermen'), who are mixed with Quichua blood, it is related that they not only ate human flesh, but even cured it for preservation. ... Formerly the Mura ... were greatly feared; this once powerful and populous tribe, however, was almost entirely destroyed at the end of the last century by the Mundruco; the remnant is scattered. ... The Mura are the gypsies among the Indians on the Amazon; and by all the other tribes they are regarded with a certain degree of contempt as pariahs. ... Much to be feared, even among the Indians, are also the Miranha (i. e., rovers, vagabonds), a still populous tribe on the right bank of the Japura, who seem to know