ICHTHYOLOGICAL GAZETTEER 69 
the left at Pebas; site of much collecting by Orton and Hauxwell, and recently 
by Mr. Scherer. Alternative spelling, Ampiyacu. 
ANGASCANCHA: a lake three miles northeast from the Smelter (q.v.), where 
collections were made by Dr. A. Davis (Evermann and Radcliffe.) 
AncostuRa: Cuzco valley, on Rio Huatanay (q.v.).** 
ANTOFAGASTA: city in north-central Chile, southern limit of this report, 23 
S. latitude, on Pacific coast; terminus of the La Paz railway system, and center 
of the nitrate belt. 
Apurtmac, Rio: most remote tributary of the Amazon, arising in southern 
Peru at Lago Villafrio, near Cailloma, Dept. of Arequipa, flowing northwestward 
to unite with the Mantaro and forming the Ene, thence Joming the Tambo and 
flowing to join the Urubamba and forming the Ucayali. 
ArAPA: village and lake of the same name, some ten miles north of Lake 
Titicaca; the lake with numerous reedy embayments.* 
Arica: city, formerly Bolivian, now Chilean, on the Pacific coast. Rainless, 
arid, without streams. Few very small, brackish beach-pools.* 
Ascoran, Laco: in northern Chile, on La Paz railway, elevation above 12000 
feet; a saline pampa some twenty-five miles in length, encircled by volcanic peaks, 
both active and extinct. During the dry season, its waters reduced to bayoux, 
some of them spring-fed and rather fresh.* 
ATOCHA: river on eastern slope of Bolivia, tributary to the Rio Grande; at 
that time terminus of the Bolivian-Argentine railway. A wide stream in a canyon 
with walls much eroded; many channels appearing and again losing themselves in 
the rocky canyon floor.* 
AULLAGAS, LaGco; see Poopo.* 
AzANGARO: village, river, and province, Dept. of Puno, Peru, on the rather 
level terrain of the Titicaca basin, and to the north of the lake; the river a small, 
sluggish, meandering stream entering Rio Ramiz, and thence to the lake.* 
AzuPizu: sixth rest-house (tambo) of the Via Central, in the valley of Rio 
Paleazu; a small river of the name flowing to the Paleazu.* 
Bausas: village on the intercordilleran Maranon, at the crossing of the north- 
ern trail from Cajamarca to Moyobamba. Elevation 3500 feet. (Pearson, 
gSia)r a 
BarRANCA: village on left bank of Alto Maranon below the Rio Morona, 
named for the high river banks.* 
Bianco, Rio: railway station, and small stream entering Rio Rimac at 11000 
feet elevation on the western slope of the western cordillera; glacial sources.* 
BrETANA: hacienda of 8S. Medina on east bank of Rio Puinagua at the mouth 
of Rio Pacaya.* 
Cacutyaco (CaAcHryacu): copious affluent of Rio Paranapura, which enters 
the Rio Huallaga at Yurimaguas; Dist. Balsa Puerto, Prov. Alto Amazonas, 
Dept. Loreto, and enroute to Moyobamba (means salt river). Herndon calls it 
Cachiyacu all the way to Yurimaguas. Orton, Cope, Herndon, Mozans. 
Cacutyaco: (2) another stream entering the Yanayacu near Caymarache; (3) 
