ORTMANN: monograph of the naiades of PENNSYLVANIA. 59 



Localities in Pennsylvania, represented in the Philadelphia Academy of Natural 

 Sciences: 



Ohio River, Beaver, Beaver Co.; Coraopolis, Allegheny Co. (S. N. Rhoads). 



Other localities represented in the Carnegie Museum: 



Lake-drainage: 

 Lake Erie, La Plaisance Bay, Monroe Co., Micliigan (C. Goodrich). 



Ohio-drainage: 

 Ohio River, St. Marys, Plea.sants Co., West Virginia; Portland, Meigs Co., Ohio; Portsmouth, Scioto 



Co., Ohio. 

 West Fork River, Lynch Mines, Harrison Co., West Virginia. 

 Little Kanawha River, Grantsville, Calhoun Co., West Virginia (W. F. Graham). 

 Elk River, Shelton, Clay Co., West Virginia. 

 New River, Hinton, Summers Co., West Virginia. 



Tennessee-drainage : 

 Tennessee River, Tuscumbia, Colbert Co., and Florence, Lauderdale Co., Alabama (H. H. Smith). 

 Shoals Creek, Lauderdale Co., Alabama (H. H. Smith). 

 Flint River, Gurley, Madison Co., Alabama (H. E. Wheeler). 

 Paint Rock River, Paint Rock, Jackson Co., Alabama (H. H. Smith). 

 Tennessee River, Concord and Knoxville, Knox Co., Tennessee. 

 French Broad River, Boyd Creek, Sevier Co., Tennessee. 

 Nolichucky River, Chunns Shoals, Hamblen Co., Tennessee. 

 Holston River, McMillan and Mascot, Knox Co.; Hodges, Jefferson Co.; Turley Mill and Xoeton, 



Grainger Co.; Austin Mill and Church Hill, Hawkins Co., Tennessee. 

 South Fork Holston River, Pactolus, Sullivan Co., Tennessee. 

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



Washington Co., Virginia. 

 Clinch River, Sol way, Knox Co.; Edgemoor, Clinton, and Offutt, Anderson Co.; Clinch River Station, 



Claiborne Co.; Oakman, Grainger Co., Tennessee; Speers Ferry, Scott Co., Virginia. 



West of the Mississippi: 

 James River, Galena, Stone Co., Missouri (A. A. Hinkley). 

 White River, Hollister, Taney Co., Missouri (W. I. Utterback); Rogers, Benton Co., Arkansas (R. L. 



Moodie); Cotter, Baxter Co., Arkansas (A. A. Hinkley). 



Distribution and Ecology in Pennsylvania (See fig. 7) : In Pennsylvania, this 

 species has a rather wide distribution, being found in all three river-sj'-stems. It 

 goes rather high up (in the Allegheny as far up as Warren Co., according to INIarshall, 

 1895). The smallest streams in which I have found it are SlipperjTock, French, 

 and Dunkard Creeks. From the Monongahela proper records are missing, but 

 it ascends to West Virginia (West Fork River). It is nowhere abundant, and is 

 decidedly one of the rarer shells, only few individuals having been found at any 

 one place. This also holds good for the Ohio below Pittsburgh, where, this species 

 is by no means abundant. 



