94 MEMOIRS OF THE CARNEGIE MUSEUM. 



Other localities represented in the Carnegie Museum: 



Ohio-drainage: 



Ohio River, Congo, Hancock Co., West Virginia; Toronto, Jefferson Co., Ohio; St. Marys, Pleasants 

 Co., West Virginia; Parkersburg, Wood Co., West Virginia; Portland, Meigs Co., Oliio; Ports- 

 mouth, Scioto Co., Ohio. 



West Fork White River, Riverside, Greene Co., Indiana (J. D. Haseman). 



Elk River, Gassawaj', Braxton Co., and Shelton, Clay Co., West Virginia. 



Levisa Fork, Big Sandy River, Prestonsburg, Floyd Co., Kentucky. 

 Tennessee-drainage : 



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



Paint Rock Riyer, 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.; Noeton, Grainger Co.; Austin 

 Mill, Hawkins Co., Tennessee. 



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



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

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



Emory River, Harriman Junction, Roane Co., Tennessee. 



Gulf-drainage: 

 Pearl River, Mississippi (Juny collection). 



Black Warrior River, Squaw Shoals, Jefferson Co., Alabama (H. H. Smith). 

 Cahaba River, Pratts Ferry, Bibb Co., and Gurnee, Shelby Co., Alabama (H. H. Smith). 

 Coosa River, Wetumpka, Elmore Co.; Weduska and Peckerwood Shoals, and Wilsonville, Shelby Co.; 



Coosa Valley and Riverside, St. Clair Co., Alabama (H. H. Smith). 

 Choccolocco Creek, Jackson Shoals, Talladega Co., Alabama (H. H. Smith). 

 Chattooga River, Cedar Bluff, Cherokee Co., Alabama (H. H. Smith). 



Etowah River (R. E. Call) and Oostanaula River (G. H. Clapp, donor), Rome, Floyd Co., Georgia. 

 Sepulga River, Herbert, Conecuh Co., Alabama (Alabama Museum, donor). ^'^ 



Distribution and Ecology in Pennsylvania (See fig. 10) : This is a species re- 

 stricted to the large rivers, Ohio, Allegheny, and Monongahela, but extremely 

 abundant in them. I have never seen it in the Allegheny above Templeton in 

 Armstrong Co. In the Monongahela it once must have gone up above Charleroi 

 at least as far as the West Virginia state-line, since I have found it in an Indian 

 garbage-heap at Point Marion (See Ortmann, 1909c, p. 13). 



Elliptio niger lives preferably in coarse gravel, often among heavy stones, 

 in strongly flowing water, to which habitat it is especially adapted by its heavy, 

 strong shell. Call (1900, p. 510) gives as its habitat "muddy bottoms," which is 



§' The specimens from the Coosa-drainage have in part been labeled by Walker as U. incrassatus 

 Lea. But I consider them to be E. niger. They reach a considerable size, while the real U. incrassatus 

 from the Chattahoochee River is a dwarf form. 



