MELANIIDJ!. 205 



Sub-Genus EURYCAELON, Lea 



P. Acad. Nat. Sci. 1864, tj/pe Oaniobasis wnlonata ; subgenus of Ooniobasis, 

 fide Tryon. 



14. Anculosa [Euryeaelon] crassa. 



Anculosa crassa, Haldeman, Mon. Limn., 1841. 



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



15. Anculosa [Euryeaelon] anthonyi. 



Anculosa Anthonyi, Budd, Redfield, Ann. Lye. New York, VL, 1854. 

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



Genus LITHASIA, Haldeman. 

 Sup. Mon. Limniades, 1840, type Lith. ohovata. Say. 



1. Lithasia obovata. 



Melania obovata. Say, Neiv Harmony Diss. 1829. 



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



Sub-Genus ANGITHEMA, 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 ; coU. Prof. W, Newcomb. 



3. Lithasia [Angitrema] geniculata. 



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

 genicula. 



1 Tennessee ; coll. Prof. W. Newcomb. 



