BULIMUS. 269 



the color. The lip, at the points where the lines termi- 

 nate, is crenate, or notched ; which peculiarity has sug- 

 gested one of the synonyms of the species. The axis is 

 usually shorter than m the preceding variety ; and, con- 

 sequently, the body whorl and aperture are larger in 

 proportion to the whole magnitude of the shell ; the colu- 

 mella is also more folded and thickened. The aperture 

 is white. The other variety is marked by broad, entire 

 or interrupted, bands or blotches of deep brown. These 

 sometimes cover nearly the whole surface, at other times 

 they are broken into irregular spots, which are arranged 

 above and below the sutures. The apex and columellar 

 margin are rosy"; and so closely connected are these two 

 characters with the presence of the brown color on the 

 surface, that if a single spot or hne of it is seen extern- 

 ally, the columellar margin will be pretty certainly found 

 to be rosy. The columella is more prominently folded 

 and thickened than in either of the other varieties. 



Well characterized specimens of these three varieties 

 differ so much from each other that they might well be 

 considered to be specifically distinct; but the passage 

 from one to the other may be readily detected in some 

 specimens. We see some retaining the wide yellow 

 bands, amidst which are numerous, fine, green lines ; 

 this shows the connection of the two first named varieties ; 

 but such specimens are comparatively rare. On the 

 other hand, specimens are much more common exhibitino- 

 the broad brown bands or blotch'es, upon the superior 

 part of the spire, «vhile the last, and perhaps the penult- 

 imate, whorls are marked with green lines alone. 

 VOL. 11. 68 



