MENDONCA, Augusto Netto de (men-dong'-sah), Brazilian naval officer, born in Pernambuco, 4 August, 1834; died in Paraguay, 9 December, 1868. After studying in the naval academy of Rio Janeiro, he became a midshipman, and in 1855 served in the bombardment and capture of the fortifications of Paysandu in Uruguay. In February, 1865, he was praised by the commander-in chief of the naval forces at Montevideo for his valor in the attack on that city, and for his defence against a mob of the prisoners that were taken there. He commanded a gun-boat in Uruguay in 1865, and afterward the gun-boat "Greenhalgh" in the passage of the army to the Paraguayan bank of the Parana on 16 April, 1866, engaging a battery on the 17th. He took part in the bombardment of Curuzu and Curupaity, and in the iron-clad "Mariz e Barros " led the fleet when a reconnoissance was made off Angostura, in which his skull was fractured by a fragment of a shell.