20^ melaniidj:. 



They do not agree well with Tryon's figures. 



29. Goniobasis acuta. 



Melania acuta, Lea, Philos. Trans. IV, 1832 — Tennessee River. 

 4 New York ; ex c. Prof. W, Newcomb . 



30. Goniobasis laeta. 



Melania laeta, Say. 



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



31. Goniobasis eontinens. 



Goniobasis eontinens. Lea, P. Acad. Nat. ScL, 1862 — North Alabama. 

 5 Alabama ; ex c. Prof. W.Newcomb. 



Sub-Genus SCSIZOSTOMA, Lea. 



Amer. Phil. Soc. 1842, tyipe M. excisa, and P. Acad. Nat. Sci. Philad. 1860 

 [not of Bronn, 1835, tohich=LJurt/omphalus'] ; = Schizochilus, Lea, 

 Trans. Amer. Phil. Soc, 1852 ;=Gt/rotoma, Shut. 1845. 



Fide M. Brot, distinct Genus, as Gyrotoma, Shat., including 

 Meseschiza, Lea. 



32. Goniobasis [Schizostoma] babylonica. 



Melania babylonica. Lea, Philos. Proc. IV, 1845— Ohio. 

 2 Alabama ; ex c. Rev. E. R. Beadle. 



Sub-Genus MESE8CHIZA. Lea. 



P. Acad. Nat. Sci. Philad., 1864, type M, grosvenorii. Lea. 

 Not represented in the Museum. 



Genus ANCULOSA, Say. 



J. Acad. Nat. Sci., 1821, type Mel. praerosa, Say ;=Leptoxis, Brot and 

 Auct. \_as of Hafin. 1819]. 



1. Anculosa costata. 



Anculotus costatus, Anthony, J. Bost. S. Ill, 1840, Cincinnati. 

 6 Oliio ; ex c. Dr. F. Stoliczka. 



