30 MEMOIRS OF THE CARNEGIE MUSEUM. 



representatives; nevertheless there is a tendencj' in this form to become more 

 swollen in the larger rivers (See PL III, figs. 2, 3). 



Localities in Pennsylvania represented in the Carnegie Museum: 



Ohio River, Shippingport, Cooks Ferry, and Industry, Beaver Co. 



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



Mahoning River, Mahoningtown, Coverts, Edinburg, and Hillsville, Lawrence Co. 



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



Jamestown, Marcer Co.; Linesville, Crawford Co. 

 Connoquenessing Creek, Ellwood Citj', Lawrence Co. (G. H. Clapp, H. H. Smith, & G. L. Simpson, Jr.); 



Zehenople, Harmony, Butler Co. 

 Slippery-rock Creek, Wurtemberg, Lawrence Co. 

 Pymatuning Creek, Pymatuning Township, Mercer Co. 

 Padan Creek, Linesville, Crawford Co. (0. E. Jennings). 

 Allegheny River, Aladdin, Godfrey, Johnetta, Kelly, and Mosgrove, Ai-mstrong Co.; Walnut Bend, 



^ enango Co. 

 Crooked Creek, Rosston, Armstrong Co. 



French Creek, Utica, Venango Co.; Cochranton, Meadville, and Cambridge Springs, Cra'W'ford Co. 

 Conneaut Outlet, Conneautlake, Crawford Co. 

 Leboeuf Creek, Waterford, Erie Co. 

 Dunkard Creek, Dunkard, Mount Morris, Greene Co. 

 Cheat River, Cheat Haven, Fayette Co. 



Locality in Pennsylvania represented in the Philadelphia Academy of Natural 

 Sciences: 



Ohio River, Beaver, Beaver Co. (S. N. Rhoads). 



Other localities represented in the Carnegie Museum: 



Lake-drainage: 

 Tonawanda Creek, Erie Co., New York (Smith collection). 

 Sandusky River, Upper Sandusky, Wyandot Co., Ohio (C. Goodrich). 



Maumee River, Roche de Boeuf Rapids and Otsego Rapids, Wood Co., Ohio (C. Goodrich). 

 Swan Creek, Toledo, Lucas Co., Ohio (C-. Goodrich). 

 Silver and Beaver Creeks, Williams Co., Ohio (C. Goodrich). 

 St. Mary's River, Rockford, Mercer Co., Ohio (C. Goodrich). 

 Ottawa River, Lucas Co., Ohio (C. Goodrich). 



Lake Erie, Maumee Bay, at mouth of Ottawa River, Lucas Co., Ohio (L. S. Frierson donor)." 

 Raisin River, Grape P.O., Monroe Co., and Adrian, Lenawee Co., Michigan (C. Goodrich). 

 Rouge River, Wayne Co., Michigan (C. Goodrich). 

 Gratiot Co., Michigan (C. Goodrich) (Saginaw drainage). 



Ohio-drainage: 

 Ohio River, Toronto, Jefferson Co., Ohio; St. Mary's, Pleasants Co., and Parkersburg, Wood Co., West 



Virginia; Portland, Meigs Co., Ohio. 

 Conotton Creek, New Hagerstown, Carroll Co., Ohio. 

 Tuscarawas River, Ohio (Holland collection). 



" A dead shell, probably washed into the lake from the river. 



