84 BULLETIN OF THE BUREAU OF FISHERIES. 



Localities Whbeb Specimens op Native Species Were Collected. 



INTRODUCED SPECIES. 



From time tx) time fishes from other regions have been introduced into the rivers and lakes of the 

 Lahontaji system. This has usually been done without any serious study of local conditions which 

 might affect the introduced form or of any consideration of the relations which might arise between 

 introduced and native species. Among the introduced species most of the following seem to have 

 established themselves, some, especially the carp and possibly the Mackinaw trout, to the detriment 

 of more valuable fishes. Black bass are said to reach a large size in Eagle Lake and in Humboldt River. 

 None was seen by the writer. " Black bass" from Walker Lake proved to be Sacramento perch. 



