OBSERVATIONS. 



This pretty little species occured in great numbers in a 

 small stream in Kentucky. It may be distinguished from 

 our other species by its small size, combined with the ex- 

 istance of a carinated line only formed in its immature 

 state ; having increased to four or five volutions the carina 

 is no longer formed. 



REFERENCE TO THE PLATE. 



Figure 4, front view. 



a, the spire enlarged to show the carina. 



PI. 47. 



MELANIA LAQUEATA. 



DESCRIPTION. 



Shell oblong, conic ; spire longer than the aperture, ele- 

 vated, acute at tip; volutions moderately convex, with 

 about seventeen, regular, elevated, equal, equidistant costal 

 on the superior half of each volution, extending from su- 

 ture to suture and but little lower on the spire, and becom- 

 ing obsolete on the body whorl ; suture moderately im- 

 pressed J labrum and columella a little extended at base. 



SYNONYM. 



M. LMiVLAi Ay Nob, Dmemimtor oJUmilul Knowledge. 

 PU 3. 



