APPENDIX. 259^ 



timber, &c. It afterwards frequently occurred in similar si- 

 tuations, until we approached Lake Superior, when it was 

 no more seen. Like its congeners the inhabitant is much too 

 large to retract within the shell, and a great portion of the 

 body is therefore constantly exposed. No species of this 

 genus has been hitherto found in this country ; the disco- 

 very of this shell is therefore the more interesting. The 

 specimens which we collected do not appear to diflfer in 

 any respect from those of Europe, 



BULIMUS, Briig. 



B. lubricus of authors. This species occurred under 

 stones, &c. on the shores and islands of Lake Winnepeek 

 and Lake of the Woods. It is altogether similar to the 

 European specimens of this species, excepting that the la- 

 bium is somewhat more transverse. 



PUPA. 



P. modesta. Shell dextral, suboval, minutely wrinkled : 

 apex obtuse; whorls six; umbilicus distinct; aperture 

 obliquely subovate ; labium with a prominent compressed 

 semioval tooth equidistant from the extremities of the la- 

 brum, and a somewhat conic one rather below the middle 

 of the columella ; lahrutn not reflected, joining the pre- 

 ceding whorl at its upper extremity with a curve ; biden- 

 tate, lower tooth placed opposite to that of the middle of the 

 labium, the others smaller and placed a little above. 



Length less than one-tenth of an inch. 



Inhabits the North-west Territory. PI. 15, fig. 5. 



Var. «. The smaller tooth of the labrum obsolete or 

 wanting;. 



