Vol. 40, pp. 65-74 June 30, 1927 PROCEEDINGS * OF THE BIOLOGICAL SOCIETY OF WASHI FISHES FROM McKEAN, POTTER AND CAMERON COUNTIES, PENNSYLVANIA. BY HENRY W. FOWLER AND J. GORDON CARLSON. > During the summer of 1926 collections of fishes from north-western Pennsylvania were made by Messrs. J. C. Galloway and J. Gordon Carlson. As several river basins diverge from this region, a word as to localities is necessary. In McKean County the collections are from the Allegheny River, Lillibridge Creek, Skinner Creek, Sartwell Creek, Comes Creek, and Port-age Creek near Port Allegany and from Brewer Run near Colegrove. These represent the materials from the Allegheny River Basin. In Cameron County all are from the Susque-hanna River basin in the Sinnamahoning-Portage Creek and Cawley Run near Sizerville and in North Creek near Emporium. The Genesee River was examined in the vicinity of Genesee from the State line to a few miles south of Genesee. According to Mr. Galloway's notes, the Genesee River at Gold was but a small brook a foot or two wide, some miles north it was four to eight, at Hickox ten to fifteen, and at the New York State line above Genesee, after four streams have united ten miles from Gold, it was almost as large as the Allegheny at Port Allegany. Altogether several hundred specimens were obtained and placed in the collection of The Academy of Natural Sciences of Phila-delphia. We are indebted to Mr. Galloway for the use of his notes, freely modified and duly credited with his initial. This paper has been prepared as little has been given of this interesting ichthyfauna. So many of the streams in the western section of the State have been polluted and the fishes either greatly reduced or exterminated, that it is hoped that the lWith permission of the Academy of Natural Sciences of Philadelphia. 14— Pboc. Biol. Soc. Wash., Vol. 40, 1927. (65)