20% MELANIID^. 



They do not agree well with Tryon's figures, 



29. Goniobasis acuta. 



Melanin acuta, Lea, Fhilos. Trans. IV, 1832 — Tennessee River. 

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



30. Goniobasis laeta. 



Melania liieta, Say. 



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



31. Goniobasis continens. 



Goniobasis continens. Lea, P. Acad. Nat. Sci., 1862 — North Alabama. 

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



Sub-Genus SCHIZOSTOMA, Lea. 



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

 [not of Bronn, 1835, ivhich^Euryomphalus'] ; = Schizochilus, Lea, 

 Trans. Amer. Phil. Soc, 1852 ;:=Gyrotoma, Shut. 1S45. 



Fide M. Brot, distinct Genus, as Gyrotoma, Shut., 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 MESESCHIZA. 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 Bafin. 1819]. 



1. Anculosa costata. 



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

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



