The
Tigre is a tributary to the
Amazon River west of the
Nanay, and is navigable for 125 miles from its confluence with the Amazon. Like the Nanay, it belongs wholly to the plains. Its mouth is 42 miles west of the junction of the
Ucayali with the Amazon. Continuing west from the Tigre we have the
Parinari[?],
Chambira[?], and
Nucuray[?], all short lowland streams, resembling the Nanay in character.
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