58 Proceedings of the Biological Society of Washington. 



Chrosomus erythrogaster (Rafinesque). Red-bellied Dace. 



Only known from Cope's material obtained in the Kiskiminitas River, 

 which I reported recently. 1 



Chrosomus erythrogaster eos (Cope). Eastern Red-bellied Dace. 

 Known only from Cope's types, 2 obtained in Meshoppen Creek, Susque- 

 hanna basin, in September, 1861, and of them but three now extant. 



Hybognathus nuchalis Agassiz. Silvery Minnow. 

 Reported from the Ohio basin by Cope, 3 though I have no material. 



Hybognathus nuchalis regius (Girard). Eastern Silvery Minnow. 

 Only in the Delaware tidal in Bucks, Delaware and Philadelphia Counties. 



Hybognathus nuchalis argyritis (Girard). Blunt-jawed Silvery Minnow. 

 Known from Cope's material from the Kiskiminitas I recently noticed. 4 



Pimephales promelas Rafinesque. Black-headed Minnow. 

 I met with it in the Ohio basin of McKean County. 



Pimephales notatus (Rafinesque). Blunt-nosed Minnow. 



Delaware basin in Bucks, Lehigh and Montgomery Counties. 



Susquehanna basin in Berks, Blair, Lebanon, Dauphin, Snyder and York 

 Counties. 



Ohio basin in Allegheny, Clarion, Indiana, McKean and Westmoreland 

 Counties. 



Semotilus bullaris (Rafinesque). Fall Fish. 



Delaware basin in Berks, Bucks, Chester, Delaware, Lehigh, Monroe, 

 Montgomery, Northampton, Philadelphia, Pike and Wayne Counties. 



Susquehanna basin in Berks, Bradford, Cambria, Chester, Clinton, 

 Cumberland, Huntingdon, Lancaster, Lycoming, Mifflin, Montour, 

 Potter, Somerset, Wayne and York Counties. 



Potomac basin in Franklin and Somerset Counties. 



Semotilus atromaculatus (Mitchill). Creek Chub. 



Delaware basin in Berks, Bucks, Chester, Delaware, Lehigh, Monroe, 

 Montgomery, Northampton, Philadelphia, Pike and Wayne Counties. 



North East basin in Chester County. 



Potomac basin in Franklin and Somerset Counties. 



Susquehanna basin in Berks, Blair, Cameron, Chester, Clinton, Colum- 

 bia, Cumberland, Dauphin, Huntingdon, Lackawanna, Lancaster, Lebanon, 



iProc. Acad. Nat. Sci. Phila., 1908 (1909), p. 519. 

 2C. eos Cope, Proc. Acad. Nat. Sci. Phila., 1861, p. 523. 

 3Rep. Com. Fisher. Pa., 1879-80 (1881), p. 91. 

 *Proc. Acad. Nat. Sci. Phila., 1908 (1909), p. 521. 

 »L. c, p. 522. Port Allegany. 



