240 



ON THE DISTRIBUTION OF FRESH-WATER FISHES 



founded, if marked differences were observed between the fish of such trades of the 

 river as do not materially differ in their elevation above the sea, but flow under differ- 

 ent latitudes."* 



Whether different portions of the course of a river differ in their fish-fauna, has 

 been already indicated, and will be further. The question of the importance of water 

 communication, and, to a slight degree, that of latitude, is also to a great extent 

 considered below. 



The following table presents at cue view the differences and resemblances in the 



fish-faunfB of the four rivers. They may be in part summed up as follows : 



No. of species. 



Common to four rivers, ...... 5 



Common to the Eoanoke and James only, .... 4 



Common to the James and Kanawha only, .... 4 



Common to the Kanawha and Holston only, .... 2 



Common to James, Roanoke and Kanawha only, ... 1 



Total number of species, ...... 56 



Roanoke. Ja^ies. 



PoecilicMhys flabdlatus, P.flabellatus, 



Kanawha. 



p. flabellatus, 



Boleosoma olmstedi, var., B. olrastedi, var., 

 Hyostoma blennioperca, H. blennioperca, 



Etheostoma blonnioides. 



E. blenuioides. 



Lepomis oplithalmicus, Lepomis appendix, 

 CcraticMliys biguttatics, C. biguttatus, 



Argyreus atronasus, 



Clinostomus affinis, 

 Hypsilepz's cornutus, 



H. ardens, 



Semoiilus corporaUs, 

 S. rbothens, 

 A. atronasus, 



Clinostomus affinis, 

 H. cornutus, 

 H. analostanus, 



Lepomis miuoopas, 

 Uramdea carolinoe, 

 C. biguttatus. 



S. coi'poralis, 



A. lunatus, 

 A. nasutus, 

 Phenaoobius teretulus, 



n. Cornelius, 

 H. analostanus, 



Holston. 



p. flabellatus. 

 Poecilichtliys zonalis. 



H. blennioperca. 

 H. simoterum. 

 Cottogaster aurantiacus. 



Percina caprodes. 

 Micropterus fasciatus. 

 Ambloplites rupestris. 

 A. cavifrons. 

 Lepomis iuscriptus. 

 U. Carolina;. 

 C. biguttatus. 

 C. hyalinus. 

 C. monaclius. 

 S. corporalis. 



A. lunaius. 



P. uranops. 



//. cornutus. 

 H. galacturus. 

 H. coccogenis. 



*0n the Fishes from the bend of the Tennessee River, Amer. Jour. Sci. Arts, 1854, 3G3. 



