248 AGRICULTURE OF MAINE. 



Anodonta cataracta, Say, 1816. 



Anodonta fluviatilis, Stimpson, Alorse. 

 Anodon fluviatilis, Gould. 



Cumberland county, North Haven, Knox county 

 (Henry Jackson, Jr.). 

 Anodonta marginata, Say, 1816. 



Anodonta fragilis, Lamarck, 1819. 

 All over the State. 

 Anodonta implicata, Say, 1829. 



Cumberland, Oxford, Knox, Piscataquis counties. 

 Mighels reported this species from a pond near Eastport in 



1843. 



Alasmidonta undulata (Say), 1816, Say, 1818. 

 Strophitus sculptilis, Stimpson, Morse. 

 ]\Iargaritana undulata, Gould, 1870. 



All over the State, in ponds and rivers. 

 Alasmidonta marginata (Say) 1819. 

 Alasmodon marginata, Gould, 1841. 

 Margaritana marginata, Gould, 1870. 



"Often found but not plentiful" (Mighels, 1843) ; 

 (Morse, 1864 list) ; Westbrook, Cumberland county 

 (Rev. E. C. Bolles in P. S. N. H.). 

 Margaritana margaritifera (Linne), 1758. 

 Alasmodonta arcuata, Gould, 1841. 

 ]\Iargaritana arcuata, Stimpson, Morse, Gould, 1870. 

 All over the State in rocky and muddy brooks. 

 Unio complanatus (Solander), (Dillwyn, 1817). 

 Everywhere throughout the State. 



Sphaeriidae. 

 Sphaeriuni sulcatum (Lamarck). 

 Cyclas sulcata, Lamarck, 181 8. 

 Cyclas similis, Mighels, Stimpson. 

 All over the State. 

 Sph?erium striatium (Lamarck). 



Fish and Saint John rivers, Aroostook county, abun- 

 dant on rocky bottoms (Nylander). 

 .Sphserium striatinum var. acuminatum (Prime). 



Eagle Lake, Aroostook county (Morse, 1864 list). 



