17. Carychium. Shell conic : aperture toothed, 

 lateral, somewhat oblique, compressed, rather ear- 

 shaped, rounded at both ends ; the margin disunited 

 at top, and obtuse : operculum none. 



Type. Turbo Carychium, Montagu, 



c. Pupilladce. 



Animal terrestrial. Shell more or less cylindrical, 

 obtuse at top : aperture roundish-oval, mostly 

 toothed, truncate at top, rounded at the base, 

 slightly reflected : lower tentacula very short or 

 obsolete : umbilicus open : operculum none. 



18. Pupa. Shell cylindrical, abruptly obtuse : aper- 

 ture roundish-oval, mostly toothed ; the peritreme 

 margined and reflected. 



Type. Turbo Muscorum, Montagu. 



19. Vertigo. Shell cylindrical, very obtuse : aper- 

 ture somewhat angular, or having the outer margin 

 contracted, toothed ; the peritreme margined and 

 reflected. 



Type. Turbo Vertigo, Montagu. 



