MELANIlDiE. 205 



Sub-Genus EURYCAELON, Lea 



P. Acad. Nat. Sci.i864, type Gonlobasis umhonataj suh- genus of Gonioiasts, 

 fide Tryon, 



14. Aneulosa [Euryoaelon] crassa. 



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



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



15- Anculosa [Eurycaelon] anthonyi. 



Anculosa Anthonyi, Budd, Redfield, Ann. Lye. New York, VI, 1854:. 

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



Genus LITHASIA, Haldeman. 

 Siqj. Mon. Limniades, 1840, type LitJi. ohovata. Say. 



1. Lithasia obovata. 



Melania obovata. Say, New Harmony Di,ss. 1829. 



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



Sub-Genus ANGITEEMA, Haldeman. 



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



2. Lithasia [Angitremaj salebrosa. 



Melaniii salebrosa. Say, Neio fresMoater Shells, 1854. 

 9 Tennessee ; coll. Prof. W. Newcomb. 



3. Lithasia [Angitrema] genieulata. 



Lithasia genieulata, Haldeman, Sup. Mon. Limn. 1840 ; emetid. Lea, as L. 

 genieula. 



1 Tennessee : coll. Prof. W. Newcomb. 



