16 



THE AMERICAN NATURALIST [Vol. XLI 



Creek at Bristol, Tullytown Creek at Tullytown, and Morrisville, 

 Bucks Co. ; Montgomery Co. ; the Susquehanna basin at Paradise 

 (J. S. Witmer) and Lancaster Co. (E. D. Cope); Warren County 

 (Dr. J. H. Slack). 



Mastaccembelid.^: 



Tylosurus marinus (Walbaum). Green Gar. — Delaware River 

 (Dr. Uhler), at Bristol, Bucks Co.; Susquehanna River (E. D. 

 Cope). 



Atherinid.k 



Labidesthes sicculus (Cope). Brook Silverside. — Youghi- 

 ogheny River (E. D. Cope). 



Gasterosterid^ 



Eucalia inconstans (Kirtland). Brook Stickleback. — Erie, 

 Erie Co. 



Apeltes quadracus (Mitchill). Four-spined Stickleback. — 

 Delaware River, in tide-water, at Tinicum, Delaware Co.; Tacony, 

 Holmesburg, and Torresdale, Philadelphia Co.; Cornwells, Croy- 

 don, Bristol, Tullytown, and Morrisville, Bucks Co. 



Aphredoderid.k 



Aphredoderus sayanus ((iilliams). Pirate Perch. — Delaware 

 River at Tinicum, Delaware Co.; League Island, Tacony, Holmes- 

 burg, and Torresdale, Philadelphia Co. ; Mill Creek and the river 

 at Bristol, Bucks Co. 



Centrarchid^ 



Pomoxis annularis Rafinesque. Crappie. — Kiskiminitas River 

 (E. D. Cope). I have an example from the Delaware at Browns- 

 ville, Bucks Co. (J. G. Dillin). 



Ambloplites rupestris (Rafinesque). Rock Bass. — Beaver River 

 (E. D. Cope), Warren Co. (Dr. J. H. Slack), and Kiskiminitas 

 River (E. D. Cope). 



