NOTES ON A COLLECTION OF FISHES FROM ARGENTINA, 

 SOUTH AMERICA, WITH DESCRIPTIONS OF THREE NEW 

 SPECIES. 



B}" Barton Warren Evermann 



and 

 William Converse Kendall, 



Of the U. S. Bureau of Fisheries. 



This paper is based on a collection of fishes made in Argentina by 

 Mr. John W. Titcomb,* in 1903 and 1904, while engaged in inaugu- 

 rating fish-cidtural operations for the Argentine Government. The 

 collection contains 52 species, of which about half are from fresh 

 water. The marine species are from Mar del Plata or the market at 

 Buenos Aires. The latter are mostly from Uruguayan fisheries. The 

 freshwater species are from Rio Primero in the Province of Cordoba, 

 and from the headwaters of the Rio Negro, chiefly Lakes Nahuel 

 Huapi and Traf ul and tributary or neighboring waters. Unfortunately 

 when received some of the labels had become partly efi'aced, making- 

 some of the localities uncertain. 



Mr. Titcomb has kindly furnished us the following interesting infor- 

 mation regarding the lakes and streams of Argentina: 



In general, leaving out the larger rivers, the fresh waters of Argentina may be 

 divided into three classes: 



First, the cold clear waters of the Cordilleras and rivers having their sources in the 

 Andes from the Limay south. 



Second, clear-water streams constantly flowing and not having an excessively high 

 temperature in summer; clear-water ponds supplied with water from such streams 

 and having a constant inflow and outflow. The streams flowing south from the 

 Sierras in the Province of Buenos Aires are examples of the streams above described, 

 and in the same region Lago de Bravo and Lago de los Padres are examples of the 

 ponds coming under this head. In the northern provinces the Rio Primero and the 

 Dique San Roque belong to the same class of waters. All of them are practically 

 unproductive, containing only small fishes. 



Third, streams which are sluggish and more or less muddy, and which have an 

 excessively high temperature in summer; ponds and lakes which are natural basins 



«See Boletin del Minesterio de Agricultura, No. 3, I, May, 1904, pp. 253-278. 



Proceedings U. S. National Museum, Vol. XXXI— No. 1482. 



67 



