78 FISHES OF WESTERN SOUTH AMERICA 
where it penetrates the foothills of the Andes of northern Peru; formerly regarded 
as impassible, but I was reliably informed of five successful passages made by 
steam launch in favorable stages. Rather numerous rafts have traveled through 
the pongo downstream. Pearson has shown, and Festa before him, that it is not so 
formidable a barrier to fishes. (Pearson, 1937a; Boulenger, 1898—99.)* 
Poopo: village, river, lake of the Bolivian highlands. The village a tin- 
mining center with ancient Spanish smelter. The river arising on the western 
slopes of the Eastern Cordillera and entering the lake from the East; deeply en- 
trenched in a region of greatly displaced sedimentaries, hot springs, and the like. 
Lake Poopé (Aullagas), elevation 12200 feet, the outlet of the Titicaca basin 
through the Rio Desaguadero; very shallow, 25 by 50 miles in extent, overflowing 
into salars, or salt plains in the rainy season; water brackish.* 
Poroy: village of the upper Rio Urubamba.** 
Poraur, Rio pe: small tributary of the Rio de Pucard at Tirapata, upper 
Titicaca basin.* 
Porventr, Tampo: fourth shelter house government-sponsored, on the Via 
Central, in a saddle of the Cadena de la Sal; tropical belt.* 
Poros: Bolivian mining town just outside the Poopé basin and over the divide 
of the Eastern Cordillera on the Atlantic side; famous silver mountain of colonial 
times; former market for the scanty fisheries products of the Bolivian highlands.* 
Pucara: village near 13000 feet elevation in the upper Titicaca basin. Rio 
de Pucard, a small stream rising at La Raya and entering Lake Titicaca at the 
north through the lower Ramiz; numerous riffles, holes, and clay barrancas; con- 
siderable local fishing industry.* 
Puerto Acosta, Bolivia: village, lake port on eastern shore of Lake Titicaca, 
at the foot of the Sorata range.* 
Puerto BerRMuDEZ: military post, wireless telegraph station, tambo, and 
terminus of the Via Central with its accompanying telephone line; at the junction 
of the Chivis with the Pichis river; 205 km. from La Merced (128 mi.).* 
Puerto MELENDEZ: military outpost left bank Peruvian Amazon at the foot 
of the Pongo de Manseriche.* 
Puerto YessuP: eighth fambo, and one of the two termini of the Via Central 
on the banks of the Rio Pichis, the head of canoe navigation.* 
Purnaacua: lateral channel of the Rio Ucayali on the left, near Sarayacu, re- 
entering far below, forming an island claimed to be the largest in Amazonia except 
Maraj6. One of the mouths of the Pacaya enters the Puinagua. (Puinahua.)* 
Puno: city, bay, department; the city on the bay, an arm of Lake Titicaca; 
at 12500 feet above sea level, 494 km. from Mollendo on the Pacific coast (306 
miles). Principal market for lake fisheries. The bay, some 12 miles by 18, is 
relatively shallow, with quite shallow, rushy borders, sheltering many Orestias 
and much bird life.* 
Puautura: 9500 feet elevation, near Nusta Espana on the Rio Vileabamba, 
which is tributary to the Urubamba about ten miles above Santa Ana. 
Pusoc: on the upper Maranon above Balsas, 3700 feet in altitude. (Pearson, 
LOS Tay plese 2s) eae 
