MELANIIDA, 205 
Sub-Genus HURYCAELON, Lea 
P. Acad. Nat. Sci. 1864, type Goniobasis umbonata ; sub-genus of Goniobasis, 
Jide Tryon, 
14, Anculosa [Hurycaelon] crassa. 
Anculosa crassa, Haldeman, Mon. Limn., 1841. 
3 Tennessee; exc, Prof. W. Newcomb, 
15. Anculosa [Eurycaelon] anthonyi. 
Anculosa Anthonyi, Budd, Redfield, Ann. Lyc. New York, Vi, 1554. 
1 Tennessee; ex c. Prof. W. Newcomb. 
Genus LITHASTA, Haldeman. 
Sup. Mon. Limmiades, 1840, type Lith. obovata, Say. 
1. Lithasia obovata. 
Melania obovata, Say, New Harmony Diss, 1829. 
4 Kentucky; ex c, Dr. T. Oldham. 
Sub-Genus ANGITREM A, Haldeman. 
Sup. Mon. Limniades, Jan. 1841 (on coveri, 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. 
Lithasia geviculata, Haldeman, Sup. Mon, Limn, 1840; emend. Lea, as L. 
genicula, 
1 Teunessee; coll. Prof. W. Newcomb. 
