33 



Sphaerium rhomboideum (Say), 1822. 

 Cyclas rhomboidea, Prime, 1853. 

 Cyclas elegans, Gould, 1841. 



Kennebunk, York county (Fuller in P. S. N. H.) ; 



Aroostook county (Nylander). 

 Musculium transversum (Say). 



Stroudwater river, Cumberland county (Norton). 

 Musculium partumeium (Say). 

 Cyclas partumeia, Mighels, 1843. 

 Sphaerium partumeium, Morse, 1864. 



Great Pond, Cape Elizabeth, Cumberland county 

 (Fuller in P. S. N. H.) ; a brook South Newcastle, 

 Lincoln county (Mrs. Wenthworth) ; North Haven, 

 Knox county (Henry Jackson, Jr.). 



Musculium partumeium var. 



("A form, variety or even species, known also from R. I. 

 and Ohio," Dr. Sterki.) 



Muddy pond in field, Warren, Knox county (Ler- 



mond ) . 



Musculium truncatum (Linsley). 

 Cyclas calyculata, Mighels, 1843. 



Running brooks, under stones (Mighels) ; "Maine" 

 (Prime in Morse's 1864 list) ; Aroostook river, 

 Aroostook county (Wentworth). 

 Musculium securis (Prime), 1852. 



All over the State. 

 Musculium securis var. cardissum (Prime). 



Pout pond, Westbrook, Cumberland county (Norton 

 and P. S. N. H.) ; Square lake and Fish river, 

 Aroostook county, sandy bottom (Nylander). 

 Musculium tenuis (Prime), 1851. 

 Sphaerium tenue, Morse, 1864. 



Androscoggin (Prime in Morse's 1864 list) ; Andros- 



coggin (Prime in his Monograph, 1865). 

 Pisidium virginicum (Gmelin). 

 Cyclas dubia, Say, 1817. 

 Pisidium dubium, Gould, 1850; Prime, 1852. 

 Corneocyclas virginicum, Baker, 1906. 



Morse's list, 1864; two specimens in t)r. V. Sterkis 

 collection, from Saco, York county, sent him by 

 Roper. 



