428 Dr. R. Philippi on the River-Fishes of Chili. 



further described and figured by Girard, in the ' United States 

 Naval Astronomical Expedition/ as Percichthjs chilensis^'. 



Girard himself adds in this family^ Percichthys melanojis and 

 Percilia Gillisii. I have described two other species as Perca 

 jiocha and P. Segethi, and am now able to add to the list a 

 second species of Percilia; so that, instead of one, six Percoids 

 arc at present known to me as inhabiting the rivers of Chili. I 

 believe^ however, that there are yet more species of Pcrcichthf/s. 



I am convinced that there arc many more species of Atherina 

 (or, rather, Basilichthys) than the two given by Gay ; however, I 

 have not had sufficient leisure to examine closely the specimens 

 existing in the Museum, or to have collections formed from the 

 various localities. 



The Carp family is entirely unrepresented in Chili. Of 

 Siluroids, Guichenot in Gay^s work enumerates one Arias, one 

 Hypostomus, and four Trie homy ctcncs : of the fourth species of 

 the latter genus Girard has, with sufficient reason, made a new 

 genus, Nematogenys. lie himself gives a new species of Tricho- 

 myderus, T. Macraei, which, however, is from the province of 

 Mendoza on the eastern side of the Cordilleras. Hypostomus 

 crinaceus and Trichomyderus nigricans have not as yet come 

 under my notice, and I doubt whether or not I possess Arius 

 papillosus; on the other hand, I know five more species of Arius, 

 three new species of Trichomyderus, and two new species of 

 Nematogenys, 



We do not find a single Salmonoid mentioned by Gay as 

 found in Chili ; I know, however, at least four, all belonging to 

 the genus Farionella and to the province of Valdivia, where, on 

 account of their w^ant of scales, they are called Peladillos. 



Of the Pike family, Gay mentions not a single species as 

 belonging to the inhabited parts of Chili, and only two species 

 of Galascias from Tierra del Fuego. These diminutive repre- 

 sentatives of our Pike are very abundant, however, in the rivers 

 of Valdivia ; but, as yet, I have not had time to accurately study 

 the species. It is singular that they seem to be quite absent 

 from the interior provinces of Chili, as do also the salmonoid 

 Peladillos, while 1 believe that no Siluroid fish has as yet been 

 found in Valdivia. I have at present no sufficient data to 

 enable me to pronounce where the southern and northern river- 

 fish faunas of Chili meet. 



Of the Characinidaj one species, Cheirodon pisciculus, Girard, 

 is apparently plentiful in most of the rivers of Chili. 



* Girard has seen no spotted Trucha from Chili, neither liave I ; 

 whence I conclude, Ut, that the Chihan Trucha is ditlerent from the 

 Patagonian, 2nd, that Gay lias figured th'e Patagonian for the Chilian fish. 

 It would, in fact, be wonderful should the same river- fishes occur on both 

 §idcs of the Andes. 



