1912.] NATURAL SCIENCES OF PHILADELPHIA. 45 



Naylor's Run, Delaware County; Schuylkill River at Mill Creek 

 estuary, Beth Ayres, Walnut Hill, Montgomery County; Walton 

 Run near Byberry, Philadelphia County; Tottam Creek, Neshaminy 

 Creek near Langhorne, Bridgetown, Etterton, Long Pond, Mill 

 Creek at Flushing, Mill Creek at Wycombe, Bucks County; tributary 

 of Bushkill Creek at Belfast, Northampton County. 



Trout Run, Witmer's Mills and Snokestown Run, Lancaster 

 County. 



Tributary North Branch of Two Lick Creek, feeder to Crooked 

 Run, Grant and Pine Townships, Burnhamer, Besnham, Ross, 

 Saltgiver, Broad Head, Elders, Little, Groft's, Mud Lick, Crooked, 

 Smicksburg, Smitten, Hileman and Pickering Runs, Susquehanna 

 Creek, small branch of Pickering Run, branch of Big Mahoning 

 Creek, Cowanshanoc, branch of Crooked Creek, McCormick's Run 

 and branch of Ross Run, branch of Little Mahoning Creek, Indiana 

 County. 



Notropis rubrifrons (Cope). 



Two from a small branch of Pickering Run and seventeen from a 

 branch of Big Mahoning Creek, Indiana County. Only known from 

 the Kiskiminitas and Monongahela basins, in Pennsylvania. 



Notropis photogenis amoenus (Abbott). 



Abundant in the Neshaminy Creek near Langhorne and Bridge- 

 town, Bucks County. 

 Ericymba buccata Cope. 



Two Lick Creek, small branch of Pickering Run, Ramsey's 

 Cherry, Burnhamer, Besnham, Mud Lick, Groft's, Ross, Elders, 

 Little, Smitten and Pickering Runs, Pine Township, tributary North 

 Branch of Two Lick Creek, branch and feeder to Crooked Run, 

 Indiana County. 



Rhinicb.tb.ys atronasus (Mitchill). 



Brandywine tributary below Chadd's Ford Junction, Crossart, 

 Crum Creek near White Horse, Reese's Run, Hunter's Run tributary 

 to Ridley Creek, Chester County; Naylor's Run, Reese's Run near 

 Central Square, Delaware County; Walton Run near Byberry, 

 Philadelphia County; Beth Ayres, Walnut Hill, Mill Creek at 

 Gladwyne, Trout Run near Centerville, Montgomery County ; 

 Neshaminy Creek near Langhorne, Etterton, Long Pond, Mill Creek 

 at Flushing, Biookfield Run, Mill Creek at Wycombe, Bucks County; 

 tributary of Bushkill Creek at Belfast, Northampton County. 



Hacker's Run near Ephrata, Cocalico Creek near Denver, Lan- 



