49 
PISIDIUM. 
North America. 
1... PISIDIUM VIRGINICUM, Bourguignat. 
Smithson. Monogr. 
Quebec. 
Massachusetts. 
Western New York. 
Bronx river, N. Y. 
Ohio. 
Wisconsin. 
New Jersey. 
Pennsylvania. 
Georgia. 
Virginia. 
Maryland. 
Michigan. 
St. Ignace Island, Lake Superior. 
Pisidium Adamsi, Prime. Maine. 
Cyclas nitida, C. B. Adams, Norway, Maine, (Ex 
auctore.) 
