Parnahyba

Parnahyba, a river of Brazil, rises in the Serra Mangabeiras, about 9° S. lat., and throughout its course (650 miles) forms the boundary between the states of Maranhão and Piauí. It enters the Atlantic by six mouths. The stream is swift, but navigable by boats for nearly 350 miles. On the east bank, 14 miles from its mouth, is the unhealthy town of Parnahyba, with a considerable trade. Pop. 8000. See also PARANÁ.