eigenmann: fresh water fishes. 373 



small number of species in a restricted locality. It seems as reasonable 

 to assume that Orestias migrated from the ocean into all streams when 

 the Andes were low, became different in these segregated environments, 

 and filtered from them into Lake Titicaca, as to assume that it became 

 landlocked in an arm of the sea when that was cut off by elevation, gave 

 rise to numerous species in the one locality, and migrated from the lake to 

 the headwaters of neighboring streams. 



The Fauna of the Rio Rebeiro. 



During the years 1907 and 1908 a series of papers on the fishes of the 

 Rebeiro by Rebeira and the Cubatao by Steindachner have shown that 

 these isolated rivers have a fauna, nearly half of which is peculiar. They 

 are streams in the northern part of the state Sta Catharina emptying into 

 the Atlantic. The material came too late to incorporate in the proper 

 table without entirely resetting it. A list of the fishes from these rivers 

 is, therefore, given here. This peculiar fauna, situated between Rio 

 Grande do Sul of the La Plata province and the Parahyba of eastern 

 Brazil, demonstrates very well that the streams emptying into the Atlantic 

 do not form a highway for ready migration from the North or South. 



Peculiar species are marked *, peculiar genera f. 



* HeinipsilicJithys calmoui Steindachner. Cubatao. 

 f KvonicJithys subteres Rebeira. 



Parotocinclus ntacidicauda Steindachner. 

 f Otocinclus leitcofrenahts Rebeira. 

 f Otocinclus gibbosiis Rebeira. 



Loricaria latirostris Boulenger. 



* Loricaria henselii Steindachner. Cubatao. 

 Loricaria lijna Kner. 



f Loricaria ciibataonis Steindachner. Cubatao. 



Loricaria anus Valenciennes. 

 I Xenocara brevispinnis Regan. Cubatao. 



Ancistrus stigniaticns Eigenmann & Eigenmann. 

 f Harttia kronei Rebeira. 



Plecostonms conimersoni Valenciennes. 

 •j" Plecostomiis obtusirostris Steindachner. Cubatao. 



Trichomycterns dispar Tschudi. 



Trie homy cterus brasiliensis Liitken. 



