31 

 22. Carychium, O. F. MuUer. 



I The apcrature equalling about f the alt. of the 

 sh; somewhat ventricose; surface very finely and 

 irregularly striated, polished; alt. 1.8, diam. 0.8 

 mill. exiguum, Say. 



— apert, equalling scarcely ^ the alt. of the sh.; 

 slender; surface regularly striated, with a silky 

 gloss: columellar lamella in the penultimate whorl 

 higher and more flexuose; alt. 1.8, diam. 0.6 mill. 



exile, Ad. 



7V(?/^.— Although not ranged under "terrestrial, air breathing mol- 

 lusks" by most conchologists, Carychium [Fanl. Auriculidajmay as well 

 find its place here, 



