ORTMANN: monograph of the naiades of PENNSYLVANIA. 279 



able from specimens from the Ohio River. Therefore I do not think it advisable 

 to separate the two forms by varietal names. '*^ Specimens from Mamnee River 

 are entirely normal, i.e., like the Ohio-form. 



Localities in Pennsylvania represented in the Carnegie Museum: 



Ohio-drainage: 

 Ohio River, Shippingport, Cook's Ferry, and Industry, Beaver Co.; Neville Lsland, Allegheny Co.; Edge- 

 worth, Allegheny Co. (G. H. Clapp). 



Allegheny-drainage: '*' 



Allegheny River, Schenley, Aladdin, Godfrey, White Rock (Johnetta), Kelly, Mosgrove, and Templeton, 

 Armstrong Co.; Walnut Bend, Venango Co.; Tionesta and Hickory, Forest Co.; Warren, War- 

 ren Co. 



Crooked Creek, Rosston, Armstrong Co. 



French Creek, Utica, Venango Co.; Cochranton, Meadville, and Cambridge Springs, Craw-ford Co. 



Connewango Creek, Russell, Warren Co. (Dr. R. R. Jones). 



Monongahela-drai7iage : 

 Mouongahela River, Charleroi, Washington Co. (G. A. Ehrmann). 

 Dunkard Creek, Wiley, Greene Co. 

 Cheat River, Cheat Haven, Fayette Co. 



Lake-drainage: 

 Lake Erie, Presque Isle Bay, and beach-pools of Presque Isle, Erie, Erie Co. 



Other localities represented in the Carnegie Museum: 



Lake-drainage: 

 Severn River, Gloucester Pool, Muskoka Co., Ontario, Canada (0. A. Peterson). 

 Lake Erie, Port Rowan, Norfolk Co., Ontario, Canada (C. Goodrich); Cedar Point, Erie Co., Ohio 



(C. Brookover); La Plaisance Bay, Monroe Co., Michigan (C. Goodrich). 

 Maumee River, Waterville, Lucas Co.; and Otsego Rapids, Wood Co., Ohio (C. Goodrich). 



Ohio-drainage: 

 Tuscarawas River, Ohio (Holland collection). 

 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., Ohio. 

 Cheat River, Jaco and Mont Chateau, Monongalia Co., West Virginia. 

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

 Elk River, Shelton and Clay, Clay Co.; Gassaway, Braxton Co., West Virginia. 

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



■*- It should be borne in mind that the original recta of Lamarck is from Lake Erie, and was sub- 

 sequently called sageri by Conrad (See Walker, 1913, p. 21). The name recta should be retained for the 

 lake-form, while for the form from the Ohio the varietal name latissima Rafinesque is available. 



"' In addition it may be stated that dead shells have been seen, but not taken, in the Conemaugh 

 River, New Florence, Westmoreland Co. 



