ORTMANN: monograph of the naiades of PENNSYLVANIA. 211 



Beaver-drainage : 

 Beaver River, Wampum, Lawrence Co. (G. H. Clapp & H. H. Smith). 

 Connoquencssing Creek, Ellwood City, Lawrence Co. (G. H. Clapp & H. H. Smith). 

 Slipperj-rock Creek, Wurtemberg and Rose Point, Lawrence Co. 

 Mahoning River, Mahoningtown, Covei'ts, Edinburg, and Hillsville, Lawrence Co. 

 Neshannock Creek, Eastbrook and Volant, LawTence Co.; Leesburg, Mercer Co. 

 Shenango River, Harbor Bridge and Pulaski, Lawrence Co.; Sharpsville, Clarksville, Shenango and 



Jamestown, Mercer Co. 

 Pymatuning Creek, Pymatuning Township, Mercer Co. 

 Little Shenango River, Greenville, Mercer Co. 



Allegheny-drainage : 

 Allegheny River, Kelly, Armstrong Co.; Walnut Bend, Venango Co.; Tionesta and Hickory, Forest Co. 

 Buffalo Creek, Harbison, Butler Co. 



Loyalhanna River, Idlepark and Ligonier, Westmoreland Co."" 

 Quemahoning Creek, Stantons Mill, Somerset Co. 

 Little Mahoning Creek, Goodville, Indiana Co. 

 Sandy Creek, Sandylake, Mercer Co. 



French Creek, Utica, Venango Co.; Cochranton, Meadville, and Cambridge Springs, Crawford Co. 

 Leboeuf Creek, Waterford, Erie Co. 

 Connewango Creek, Russell, Warren Co. 



Monongahela-drainage: 

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

 Dunkard Creek, Wiley and Mount Morris, Greene Co. 

 Cheat River, Cheat Haven, Fayette Co. 



Lake Erie-drainage: 

 Conneaut Creek, West Springfield, Erie Co. 

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



Other localities represented in the Carnegie Museum: 



Lake-drainage : 

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

 Grand River, Cayuga, Haldiniand Co., Ontario, Canada (C. Goodrich). 

 Sandusky River, Fremont, Sandusky Co., Ohio (C. Goodrich). 

 Maumee River, Roche de Boeuf Rapids and Waterville, Lucas Co.; Otsego Rapids, Wood Co.; Defiance, 



Defiance Co., Ohio (C. Goodrich). 

 Raisin River, Monroe and Grape P. 0., Monroe Co., Michigan (C. Goodrich). 



Ohio-drainage : 

 Lake Chautauqua, Bemus Point (D. R. Sumstine), Griffith Landing (Miss B. Ortmann), and Celoron 



(P. E. Nordgren), Chautauqua Co., New York. 

 Tuscarawas River, Ohio (Holland collection). 

 Ohio River, Toronto, Jefferson Co.; Portsmouth, Scioto Co., Ohio. 



"" Dead shells were seen, but not taken, in the Conemaugh River at New Florence, Westmore- 

 land Co. 



