﻿Prefatory Note 



The present study is a continuation of Indiana University 

 Studies Nos. 16, 18, 19, 20, 23, 24, and 25. It presents a sum- 

 mary of an examination of the fresh-water fishes of South Ameri- 

 ca west of the Andes of Bogota and of the Pacific slope of Ecua- 

 dor and Peru. Other chapters giving summaries and conclusions 

 are appearing in various scientific journals. A fully illustrated 

 monograph is ready for the printer. 



The material on which these studies are based consists of col- 

 lections made during the following expeditions: 



1. A "Reconnaisance of Colombia" during January, Febru- 

 ary, March, and part of April, 1912, by C. H. Eigenmann. A 

 series of collections was made from Cartagena on the northern 

 coast up the Magdalena to Girardot and up to Bogota, between 

 Bogota, Ibague, Cartago, Cali, to Buenaventura on the Pacific 

 Ocean, thence up the San Juan and down the Atrato to Rio 

 Sucio and back to Cartagena. These collections were supple- 

 mented by others collected by Manuel Gonzales who was a mem- 

 ber of the expedition. He collected particularly between Bogota 

 and Honda, Bogota and San Gil, and Bogota and Barrigon, re- 

 spectively, west, north, and east of Bogota. 



2. "The Landon-Fisher Expedition to Colombia" by Arthur 

 Henn and Charles Wilson. 



They collected particularly in the Rio Telembi of the Rio 

 Patia basin. Later Mr. Wilson collected in the upper San Juan, 

 in the Rio Atrato, and the Rio Truando of the Atrato basin dur- 

 ing January, February, and March of 1913. 



3. "The Landon Ecuadorian Expedition" by Mr. Henn. 

 Mr. Henn after separating from Mr. Wilson spent the rest of 



1913 and part of 1914 in exploring some of the headwaters of the 

 Rio Patia, the lower courses of the Rio San Juan, in Colombia 

 and the Chone, Portoviejo and Guayas basins in Ecuador, and 

 in the highland of Ecuador. 



4. "The Irwin Expedition to Peru, Bolivia, and Chili" by 

 C. H. and Adele Eigenmann and Wm. Ray Allen. Only a small 

 part of the material of this expedition pertains to these studies. 

 Collections were made in 1918 and 1919 in the Chira, Piura, Jeq- 

 uetepeque, Rimac, and Chili rivers in Peru. 



