205 

 Sub-Genus EURYCAELON, Lea 



P. Acad. Nat. Sci. 1864, type Qoniolasis umbonata ; sub-genus of Goniobasis, 

 fide Try on. 



14. Anculosa [Eurycaelon] crassa. 



Anculosa crassa, Haldeman, Hon. Limn., 1841. 



3 Tennessee; exc. Prof. W. Newcomb. 



15- Anculosa [Eurycaelon] anthonyi. 



Anculosa Anthonyi, Sudd, Redfield, Ann. Lye. New York, VI, 1854. 

 1 Tennessee; ex c. Prof. W. Newcomb. 



Genus LITHASIA, Haldeman. 

 Sup. Mon. Limniades, 1840, type LitJi. ooovata, Say. 



1. Lithasia obovata. 



Melania obovata, Say, New Harmony Diss. 1829. 



4 Kentucky ; ex c. Dr. T. Oldham. 



Sub-Genus ANGITREMA, Haldeman. 

 Sup. Mon. Limniades, Jan. 1841 [on cover!, type Mel, armigera, Say. 



2. Lithasia [Angitrema] salebrosa. 



Melania salebrosa, Say, New freshwater Shells, 1854. 

 9 Tennessee ; coll. Prof. W. Newcomb. 



3. Lithasia [Angitrema] geniculata. 



Litbasia geniculata, Haldeman, Sup. Mon. Limn. 1840; emend. Lea, as L. 



I Tennessee ; coll. Prof. W. Newcomb. 



