ORTMANN: monograph of the naiades of PENNSYLVANIA. 201 



Wolf Creek, Grove City, Mercer Co. 



Brush Creek, Celia, Beaver Co. 



Little Connoquenessing Creek, Harmony, Butler Co. 



Thorn Creek, McBride, Butler Co. 



Bonnie Brook, East Butler, Butler Co. 



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



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



Otter Creek, Mercer, ISIercer Co. 



Shenango River, Harbor Bridge and Pulaski, Lawrence Co.; Shenango and Jamestown, Mercer Co.; 



Linnesville, Crawford Co. 

 Pj'matuning Creek, Pymatuning Township, Mercer Co. 



Allegheny-drainage: 

 Allegheny River, Natrona, Allegheny Co.; Aladdin, Godfrey, Kelly, Mosgrove, and Templeton, Armstrong 



Co.; Hickory, Forest Co.; Warren, Warren Co. 

 Buffalo Creek, Harbison, Butler Co. 



Loj^alhanna River, Idlepark and Ligonier, Westmoreland Co. 

 Beaver Run, Delmout, Westmoreland Co. 

 Blacklegs Creek, Saltsburg, Indiana Co. 

 Yellow Creek, Homer, Indiana Co. 

 Quemahoning Creek, Stanton's Mill, Somerset Co. 

 Crooked Creek, Rosston, Armstrong Co.; Creekside, Indiana Co. 

 Little Mahoning Creek, Goodville^ Indiana Co. 

 Sandy Creek, Sandylake, Mercer Co. 



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

 Conneaut Outlet, Conneautlake, Crawford Co. 

 Conneaut Lake, Crawford Co. 

 Conneauttee Creek, Edinboro, Erie Co. 

 Brokenstraw Creek, Garland, Warren Co. 

 Connewango Creek, Russell, Warren Co. 

 Potato Creek, Smethport, McKean Co. (P. E. Nordgren). 



Monongahela-drainage : 

 Monongahela River, EHzabeth, Allegheny Co. (D. A. Atkinson). 

 Youghiogheny River, Confluence, Somerset Co. 

 Tenmile Creek, ClarksviUe, Greene Co.; Amity, Washington Co. 

 South Fork Tenmile Creek, Waynesburg, Greene Co. 

 Dunkard Creek, Wiley and Mount Morris, Greene Co. 

 Cheat River, Cheat Haven, Fayette Co. 



Lake Erie-drainage : 

 Conneaut Creek, West Springfield, Erie Co.; Springboro, Crawford Co. 

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



Genesee River-drainage: 

 Genesee River, Genesee, Potter Co. 



