226 f PROCEEDINGS OF THE ACADEMY OF [Mar., 



St. Andrews, and below the mill pond at Southport, Prince Edward 

 Island. 



Lymnaea humilis modicella Say. 



Was taken at Etang du Nord, Grindstone Island, M. I. 



Physa gyrina Say. 



East Point Ponds and ponds east of East Cape, Coffin Island; 

 Etang du Nord and several small pools on Grindstone Island, M. I.; 

 Black Pond, Tignish, East Lake at Bothwell, Dundee, stream between 

 Brackley Point and Charlottetown, in a brook at Charlottetown, 

 below the mill pond at Southport, Prince Edward Island ; Moncton, 

 New Brunswick. 

 Carychium exiguum Say. 



In a swampy alder thicket at Grindstone and in a larch swamp 

 on Grindstone Island, M. I.; on knolls in an alder thicket at Tig- 

 nish, Prince Edward Island. 

 Pisidium abditum Hald. 



Was collected on Grosse Isle; in ponds east of East Cape, Coffin 

 Id.; Etang du Nord, Grindstone, Grindstone Id., M. I.; and at 

 Charlottetown, Prince Edward Island. 



Pisidium variabile Prime. 



Was found in pools near The Narrows, Alright Id., M. I., and 

 in a pond at Tignish, Prince Edward Island. 



Anodonta cataraota Say. 



Was collected in the stream above Adams' Pond at Darnley, 

 Prince Edward Island. 



