56 Proceedings of the Biological Society of Washington. 



Potomac basin in Adams, Franklin, Fulton and Somerset Counties. 

 Genesee basin in Potter County. 



Ohio basin in Erie, Fayette, Forrest, Indiana, McKean, Lawrence, 

 Potter, Somerset, Warren and Westmoreland Counties. 

 Erie basin in Erie County. 



ARGENTINIID.E. 



Osmerus mordax (Mitchill). Smelt. 



Delaware tidal in Bucks, Delaware and Philadelphia Counties. Besides 

 the types of O. sergenti Norris 1 many examples in the markets examined, 

 but the latter largely imported. 



ICTALURID.E. 



Ictalurus furcatus (Valenciennes). Chuckle-head Cat. 



Reported from the Monongahela River by Evermann and Bollman. 2 



Ictalurus punctatus (Rafinesque). Spotted Cat. 



Ohio basin in Allegheny, Beaver, Clarion, (Blairsville formerly) Indiana 

 and Westmoreland Counties. 



Erie basin in Erie County. Possibly the alleged A. nigricans (Le Sueur) 

 is not distinct from the present species. The late Dr. Bean says "Erie re- 

 ceives its supply of catfish from fishermen who operate in the lake from 

 Erie to Elk Creek, with set-lines during the summer months." A number 

 of catfish in the markets and fisheries at Erie were examined and all of the 

 fork-tailed forms were the spotted cat. All had the predorsal bony bridge 

 complete and but few were without spots. 



Ameiurus catus (Linnaeus). White Cat. 



Delaware basin in Bucks, (Brandywine Creek) Chester, Delaware and 

 (League Island) Philadelphia Counties. 

 Susquehanna basin in Lancaster and (Peach Bottom) York Counties. 



Ameiurus natalis (Le Sueur). Yellow Cat. 



Only met with by me at Erie. Not found east of the Alleghanies in our 

 limits, though in the Ohio basin early recorded as far as Pittsburgh. 3 



Ameiurus nebulosus (Le Sueur). Common Cat. 



Delaware basin in Berks, Bucks, Carbon, Chester, Delaware, Lebanon, 

 Monroe, Montgomery, Northampton, Pike and Wayne Counties. 



Susquehanna basin in Bedford, Berks, Blair, Bradford, Cambria, Center, 

 Chester, Clearfield, Clinton, Cumberland, Fulton, Juniata, Lackawanna, 

 Lancaster, Lebanon, Luzerne, Lycoming, Mifflin, Montour, Northumber- 

 land, Perry, Snyder, Somerset, Sullivan, Susquehanna, Tioga, Wayne, 

 Wyoming and York Counties. 



iProc. Acad. Nat. Sci. Phila., 1868, p. 93. Schuylkill below Fairmount dam. Brandy- 

 wine Creek. 



*Ann. N. Y. Acad. Sci., Ill, 1883-5 (1886), p. 336. 

 3Pimelodus cupreus Rafinesque, Ich. Ohien., 1820, p. 65. 



