312 MEMOIRS OF THE CARNEGIE MUSEUM. 



Little Pigeon River, Sevierville, Sevier Co., Tennessee. 



Pigeon River, Canton, Haywood Co., North Carolina. 



Holston River, McMillan and Mascot, Knox Co.; Turley Mill and Holston Station, Grainger Co., 

 Tennessee. 



South Fork Holston River, Pactolus, Bluff City, and Emmett, Sullivan Co., Tennessee; Barron, Wash- 

 ington Co., Virginia. 



Watauga River, Watauga, Carter Co., Tennessee. 



Middle Fork Holston River, ChUhowie, Smj'th Co., Virginia. 



North Fork Holston River, Rotherwood, Hawkins Co., Tennessee; Hilton, Scott Co., Virginia; Mendota, 

 Washington Co., Virginia; Saltville, Smyth Co., Virginia. 



Big Mocassin Creek, Mocassin Gap, Scott Co., Virginia. 



Clinch River, Edgemoor and Clinton, Anderson Co.; Black Fox Ford, Union Co.; Clinch River Station, 

 Claiborne Co.; Oakman, Grainger Co., Tennessee; Clinchport, Scott Co., Virginia; St. Paul, 

 Wise Co., Virginia; Fink and Cleveland, Russell Co., Virginia; Raven, Richland, and Cedar Bluff, 

 Tazewell Co., Virginia. 



Powell River, Combs, Claiborne Co., Tennessee; Dryden, Lee Co., Virginia. 



Distribution and Ecology in Pennsylvania (See fig. 33) : This species has about 

 the same distribution in western Pennsylvania as L. ovata ventricosa, but it is missing 

 in the Lake Erie-drainage. In the Ohio-drainage it is practically generally dis- 

 tributed, but is quite scarce, and never found in great numbers. In the Ohio 

 below Pittsburgh I foimd it only once, and also in the Allegheny River in Arm- 

 strong Countj". Although found at a number of localities, it is rare. Farther 

 up in the Allegheny and its tributaries it is met with regularly. It is possibly 

 most abundant in Little Beaver Creek, and in the drainage of Beaver River. In 

 the whole Monongahela-drainage it has been found only in the Cheat River, and 

 more abundantly in West Virginia. It is to be noted that it goes up in the Cone- 

 maugh-drainage into the moimtain-streams in Westmoreland and Somerset Coun- 

 ties. 



In Pennsylvania it distinctly prefers riffles with lively currents and gravelly 

 bottoms, but it is not found in very strong currents and among large rocks. The 

 most favorable localities seem to be riffles with an abundant growth of Dianthera 

 arnericana and other water weeds. It distinctly differs in its ecology from L. 

 ovata ventricosa, although often found in close proximity to it. But while the 

 latter prefers more quiet water above and below the riffles, L. fasciola is found in 

 the riffles. 



General distribution: Type locality, Kentucky River (Rafinesque). 



According to Simpson (1900) it is found in the entire Ohio-drainage; in 

 southern Michigan and in New York. This is essentially correct. In the Ohio- 

 drainage it is practically everywhere, in western Pennsylvania, West Virginia, in 

 Ohio (Sterki, 1907a), and Indiana (Call, 1896a, 1900). In Illinois it seems to be 



