28 PROCEEDINGS OF THE ACADEMY OF [1894. 



Evitt's Creek, near Cuinberhmd, Md., 64,766. Color light- 

 l)ro\vn or black- brown. Apices entire. Ou the under surface of 

 stones. 



Potomtic River, Hancock, Md., 64,771. Shell compact, the last 

 whorl rounded; dark and usually banded with black; columella 

 black; spires much eroded. Size generally large. Another lot, 

 taken a few miles above Hancock 64,776, is the same in character 

 but smaller. 



Potomac River at Cherry Run, Morgan Co., W. Va., 64,770. 

 Shells large, very dark and having a black-brown basal band and 

 sometimes a sutural band. Last whorl rounded. Apex somewhat 

 eroded, but much less so than in the Hancock shells. 



South Branch of Potomac River, near Romney, W. Va., 64,760 

 and 64,759. Shells small, short, and acutely keeled. 



South Branch Potomac, near Springfield, Hampshire Co., W. 

 Va., 64,763. Specimens small, many not keeled upon the last whorl. 



Cacapon River, Wardensville, Hardy Co., W. Va., 64,773. 

 Specimens mostly small, dark colored, often three-banded. Very 

 numerous ou stones. 



Creek affluent to Cacapon River, near Wardensville, 64,765. 

 Specimens very small, globose, not keeled; color dark, mostly 3- 

 banded. 



Lost River, 4 miles from Wardensville, 64,774. 



Warm Spring Creek, about one-half mile from its mouth, Morgan 

 Co., W. Va. , 64,764. Specimens very large (length 16 mm.), 

 acutely keeled, light- brown, but covered with a black coating; apices 

 mostly perfect. The specimens from the Potomac at the mouth of 

 this creek differ from these in being generally unkeeled and much 

 eroded. 



Patterson's Creek, Mineral Co., W. Va. , 64,754. Specimens 

 small, mostly keeled. Another set, 64,753, from a "Run" affluent 

 to the same creek, consists of larger shells. 



Big Pass Creek, west of Massauattcni Mt., Shenandoah Co., Va., 

 64,775. Specimens large and globular, the adults without trace of 

 the keel, and light-brown. 



North Fork of Shenandoah River, about 3 miles S.-E. of Wood- 

 stock, Va., 64,777. Shells small. 



South Fork of Shenandoah River, 3 miles west of Luray, Page 

 Co., Va., 64,762. Rather small shells. 



