ICHTHYOLOGICAL GAZETTEER 71 
westward through mostly volcanic terrain, forming great gorges through most of 
its course. Its upper courses fished without results by Allen (1918) and Pearson 
(1921); about Arequipa by Eigenmann and daughter (1918). Principal source of 
water for the city and irrigated valley of Arequipa.* ** 
CuHincHAO, Rio: small, rapid, precipitous, rising in the central cordillera, 
flowing eastward to the Rio Huallaga above Cayumba rapids. Subject to the 
frequent flood-stages of the tropical rain forest; at other times clear.* 
CHINCHAVITOC, CHINCHAVISTO, CHINCHAVITO: mouth of the Rio Chinchao 
river on the Huallaga. A small playa, or outwash, on the East bank, with a one- 
family settlement and bananal. Ferry service on the foot-trail to the Monson. 
Elevation about 2000 feet.* 
CHINCHAYCOCHA, LaGo: a clear, mountain lake on the Pampa de Junin of 
central Peru, elevation 13500 feet; dimensions about six miles East and West, 
twenty miles long; boggy, rushy shore-line sheltering immense numbers of Orestias, 
green sponge, and nesting ducks. Now used for impounding waters for the Cerro 
de Pasco smelter at Oroya, and doubtless much altered ecologically. Also known 
as Lago Junin.* 
CHINCHERO, LAGo: small lake a short distance north of Cuzco.** 
Cuivis, Rto: tributary to Rio Pichis at Puerto Bermudez; small, turbid river 
from the foothills, navigable some distance by canoe.* 
Cuoro: an adobe village on the mud flats near the mouth of the Rio Desagua- 
dero and head of Lake Poopdé.* 
Cuosica: village on the Central railway at 3000 feet elevation, along the 
course of the Rio Rimac; mouth of Rio Santa Eulalia a short distance above; good 
fishing holes at the hydroelectric dam. The river larger here than at Lima, due 
to the withdrawal of water for irrigation.* 
Cuora: village and province, Dept. Cajamarca, on small Rio Llaucan, which 
enters the Maranon below Balsas; elevation of village 8580 feet. (Boulenger, 
1898.) 
Cuucuiro: village and bay, southern arm of Puno bay, Lake Titicaca; shallow 
water and reed-grown shoreline; much fishing, especially for Orestias pentlandi. 
An historic name for the region in colonial times, and for the main, northern body 
of Lake Titicaca. A former center of missionary activity.* 
CuuMATAGUA: large creek or small river arising on the western front of the 
eastern cordillera and entering the Huallaga above the Cayumba rapids. Deeply 
entrenched; I saw numerous fine large specimens of ammonites weathered out 
of its cliffs.* 
Cuupa: village and cerro near the head of Lake Arapa, north of Lake Titicaca; 
the conical mountain a landmark for many miles in every direction. Rio DE 
Cuupa: a small stream encircling the mountain from the northward, near Laguna 
Salinas, and entering Lake Arapa on a flat pampa with numerous sloughs.* 
Cuupapa, Rio bE: a small tributary of the upper Urubamba at Santa Ana.** 
CocHaBAMBA: Bolivian city above 8000 feet elevation on eastern slope, in the 
center of a wide agricultural valley; mining center.* 
