three, not oblique, the last whorl large and ventricose, 

 the other two constituting the spire, small, short, with 

 acute apex ; aperture ample, not much elongated, 

 rounded anteriorly ; peristome thin and sharp. 



" Length, not quite three-fifths ; breadth, seven-twen- 

 tieths of an inch." 



GEOGRAPHICAL DISTRIBUTION. Mr. Say makes the 

 following statement. " This shell is extremely common 

 in many parts of the Southern States ; it abounds in the 

 sea islands of Georgia, in the low, marshy grounds 

 behind the sand hills of the coast, where they are de- 

 stroyed in great numbers by the annual conflagration of 

 the old grass ; on Amelia Island in East Florida, I found 

 them in plenty on the highest sandy ground of the island. 

 On Cumberland Island, in Mr. James Shaw's garden I 

 obtained several specimens from the leaves of radishes." 

 It was found by Mr. Bartlett in many parts of East 

 Florida. 



REMARKS. Mr. Say observes further concerning this 

 species. " The resemblance between this species and 

 the ovalis is very great ; it differs, however, in being less 

 elongated, and of a more robust form ; the revolution of 

 the spire is much less oblique, the shell itself is thicker 

 and less fragile." These remarks indicate sufficiently 

 the distinctive characters of the species. The numerous 

 specimens we have now seen leave no doubt as to their 

 characters. They are short, rounded, and ventricose, 

 the surface is unequally wrinkled, and there is more cal- 



