OKTMANN: monograph of the naiades of PENNSYLVANIA. 255 



not evident in this case. If it should be considered desirable to distinguish the 

 Lake Erie form taxonomically, we should bear in mind that the type-locality for 

 U. alatus is Lake Erie, and that the lake-form should retain this name. The form 

 from the Ohio-drainage should then be known as P. alata megaptera (Rafinesque) 

 (1820). 



Localities in Pennsylvania represented in the Carnegie Museum: 



Ohio River, Shippingport, Cook's Ferry, and Industry, Beaver Co.; Dead Man's Island (Q. T. Shafer & 

 A. T. Shafer), Coraopolis (S. N. Rhoads), Neville Island, and Edgeworth (G. H. Clapp), Alle- 

 gheny Co. 



Allegheny River, Natrona, Allegheny Co.; Aladdin, Godfrey, Johnetta, Kelly, and Templeton, Arm- 

 strong Co. 



Little Beaver Creek, Cannelton, Beaver Co. (Miss Vera White).'^" 



Monongahela River, Westmoreland Co., and Charleroi, Washington Co. (G. A. Ehrmann). 



Dunkard Creek, Wiley, Greene Co. 



Lake Erie, Presque Isle Bay, Erie, Erie Co. 



Other localities represented in the Carnegie Museum: 



Lake-drainage: 

 Lake Erie, Vermilion (C. Goodrich), Cedar Point (C. Brookover), and Sandusky Bay, Cedar Point (0. E. 



Jennings), Erie Co., Ohio; La Plaisance Bay, Monroe Co., Michigan (C. Goodrich). 

 Maumee River, Roche de Boeuf Rapids, Lucas Co.; Defiance, Defiance Co., Ohio (C. Goodrich). 



Ohio-drainage: 



Ohio River, Congo, Hancock Co., West Virginia; Toronto, Jefferson Co., Ohio; Wheeling, Ohio Co., 

 West Virginia (W. F. Graham); St. Marys, Pleasants Co., West Virginia; Parkersburg, Wood Co., 

 West Virginia; Portland, Meigs Co., Ohio; Portsmouth, Scioto Co., Ohio. 



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



Pocatalico River, Raymond City, Putnam Co., West Virginia.'" 



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



Licking River, Farmer, Rowan Co., Kentucky. 



Tennessee-drainage : 

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

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

 Tennessee River, Brabsons Ferry, Knox Co., Tennessee. 

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

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

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



Holston Station, Grainger Co., Tennessee."^ 



"» I have seen a dead shell in Little Beaver Creek at Smith's Ferry, Beaver Co. 



'" I have seen dead specimens in Elk River at Shelton and Clay, Clay Co., and at Sutton, Braxton 

 Co., West Virginia. 



"^ I have seen a dead specimen in the North Fork of the Holston at Rotherwood, Hawkins Co., 

 Tennessee. 



