Crossword-Solution: ARINOS 6 letters, 4 clues 🏆 scrabble score: 6

The position of the Arinos-Juruena is from 1 to 1½ degrees farther west than it is there drawn, and should be where I have marked the red line of my route.

For instance: the Sun, which is called in Malay _mata-ari_, usually abbreviated into _'ari_, was in the Bororo language _metiri_, and in the language of the Apiacar Indians of the Arinos-Juruena river, _ahra_, which indeed closely resembles the Malay word.

The Serra Azul, extending from west to east, was interesting geographically, not only because it marked the northern terminus of the highest terrace of the great central plateau, but also because from it or near it rose two of the greatest rivers of Central Brazil--the Xingu and the Arinos (Tapajoz), the latter the most central and important river of Brazil, crossing the entire Republic from south to north, as far as the Amazon.

The Rio Preto, soon joined by the Rio Novo which we had seen descending from the Serra Azul, formed the Arinos River and could certainly be considered the head-waters of that immense tributary of the Amazon.

Also the friar must have mistaken--evidently from information received--the sources of the Arinos for the sources of the Amazon, which are really located some 15° of longitude west.