37 



Ancylus rivularis, Say, 1819. 



York, Cumberland, Lincoln, Knox, and Penobscot 

 counties. 

 Ancylus parallelus, Haldeman, 1844. 



All over the State. 

 Ancylus tardus, Say, 1840. 



Aroostook river at Caribou, plentiful (Nylander). 

 Ancylus ovalis, Morse, 1864. 



Androscoggin river at Bethel, Oxford county (John 

 M. Gould and Morse). 

 Ancylus pumilus, Sterki, 1904. 



Orono, Penobscot county, a few specimens in Bryant 

 Walker's collection received from Anson Allen. 

 Lymnaea columella, Say, 181 7. 



Radix columella, Morse, 1864. 



Reported from York, Cumberland, Oxford, Knox, and 

 Penobscot counties. 

 Lymnsea columella var. chalybea, Gould, 1870. 



Mud pool in old lime quarry, Thomaston, Knox county 

 (Lermond). 

 Lymnaea columella var. macrostoma, Gould, 1841. 



Brook flowing from Crawford's into Seven-tree pond 

 at South Union, Knox county, season of 1908 

 (Lermond). 

 Lymnaea umbilicata, Adams. 



Limnaea caperata, W. G. Binney, 1865. 



Buckfield, Oxford county, 3 or 4 specimens in an iso- 

 lated spring, none found there this season, 1907 

 (John A. Allen); North Haven, Knox county 

 (Henry Jackson, Jr.). 

 Lymnaea desidiosa. Say, 1821. 

 Lymnaea obrussa, Say, 1825. 

 Limnophysa desidiosa, Morse, 1864. 

 All over the State. 

 Lymnaea desidiosa var. decampii, Streng, 1896. 



Barren Brook bog, Caribou, Aroostook county 

 (in Bryant Walker's collection, received from 

 Nylander). 



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