MUSEUM OF COMPARATIVE ZOOLOGY. 275 



0. Owenii of Cuv. and Val. agrees with albus, in its large muzzle and 

 colors, rather than with Agassizii ; the description is very indefinite; 

 the type was taken in Lake Urcos. 



In the following list of the fishes obtained notes in reference to 

 value, abundance, etc. are given under the name of each species. 



Trichoniycterus dispar Gunth. 



Called Suche or Maure by the natives. 



It is found in all parts of the lake and the streams entering it. In the 

 stomachs of a number dissected small molluscs, Crustacea, and fishes were 

 found. One specimen of fourteen inches contained another of six. The 

 color is generally brown, reticulated with many narrow irregular white lines ; 

 sometimes with spots like trout or uniform. 



Adults of less than seven inches were taken ; the largest specimen meas- 

 ured sixteen. The Indians distinguish between small and large, calling the 

 former Maure, the latter Suche. They are higher priced in the market than 

 the other fishes of the lake. 



Orestias Cuvieri Cuv. et Val. 



The full grown is called Omanto and the young Peje Rev. Its market 

 value is less than that of O. Pentlandi. The bare space on each side of the 

 dorsal row of scales occurs in all adults. 



Dead ones with the stomach everted were frequently met with on the 

 shores of Titicaca Island. Ten and a half inches is the measurement of the 

 largest specimen. 



O. Pentlandi Cuv. et Val. 



Apparently not so abundant as the preceding. This species ranks next 

 to the Suche for the table. With the bare space on each side of the dor- 

 sum. One specimen shows the entire top of the head covered by a single 

 large scale ; otbers have the vertex bare. The largest secured was nine 

 and a quarter inches in length. Bova is the common name of this fish. 



O. Agassizii Cuv. et Val. 



One of the several species to which the name Carache is applied. The 

 most abundant fish in the lake. It is valued less than either of the pre- 

 ceding. 



There is much variation in the proportions of different individuals ; the 

 depth of body varies from a third to a fourth of the length, exclusive of the 

 caudal fin. In the adult the colors are uniform dark In-own above, lighter 

 below ; the young are spotted or banded. Longest specimen eight inches. 



