ACRE, or AQUIRY, a river of Brazil and principal tributary of the Purus, rising on the Bolivian frontier and flowing easterly and northerly to a junction with the Purus at 8° 45' S.
Approx.) and follows a semicircular direction north-west and north to the source of the Javary (or Yavary), to include the basins of the Purus and Jurua within Brazilian jurisdiction.
The rivers forming this system are the Maranon from Puerto Limon to Tabatinga on the Brazilian frontier (484 m.), the Japura, Putumayo, Javary, Napo, Tigre, Huallaga, Ucayali, Pachitea, Jurua, Purus, Acre, Curaray and Aguarico all navigable over parts of their courses for steamers of 4 to 8 f t.
The inclusion of the upper waters of the Brazilian rivers Jurua, Purus and Acre is pro forma only, as they are wholly under Brazilian jurisdiction.
Which may account, perhaps, for its rarity, if, indeed, it be really scarce in its native home, which is probably the eastern slopes and tablelands of the Bolivian and Peruvian foot-hills bordering on Brazil, inclusive of the headwaters of the Purus, Acre and Jurua rivers.
10 20' S., and designated a straight line to the source of the Javary as the frontier, which gave to Brazil a large area of territory; but when the valuable rubber forests of the upper Purus became known the Brazilians invaded them and demanded another modification of the boundary line.
An exception formerly existed at Puerto Acre, on the Acre river, to which ocean-going steamers could ascend from Para, but Brazil first closed the Purus and Acre rivers to foreign vessels seeking this port, and then under a treaty of 1903 acquired possession of the port and adjacent territory.
One of its marked features is the five parallel furos l which from the north-west at almost regular intervals the Amazon sends to the Purus; the most south-westerly one being about 150 m.
Farther down the Purus to the right three smaller faros also connect it with the Amazon.
It is navigable for a period of about five months of the year, when the Purus valley is inundated; and, for the remaining seven months, only canoes can ascend it sufficiently high to communicate overland with the settlements in the great indiarubber districts of the Mayutata and lower Beni; thus these regions are forced to seek a canoe outlet for their rich products by the very dangerous, costly and laborious route of the falls of the Madeira.
The Jurua is the next great southern affluent of the Amazon west of the Purus, sharing with this the bottom of the immense inland Amazon depression, and having all the characteristics of the Purus as regards curvature, sluggishness and general features of the low, half-flooded forest country it traverses.
HIPURNIAS, a tribe of South American Indians, 2000 or 3000 in number, living on the river Purus, western Brazil.
CATAUXI, a numerous cannibal tribe of South American Indians of the Purus river district, Brazil.