92 LIMNAA. 
Northern Maine; St. Lawrence River, 
English River, British America; Hellgate 
River and Fort Vancouver, Oregon. 
This remarkable species, the American ana- 
logue of L. auricularia, will doubtless be found 
an inhabitant of the vicinity of the boundary 
line between the United States and British 
North America throughout its entire extent. 
I merge it in my L. Binneyi, and also the 
two Oregon specimens figured by Haldeman, 
Plate 14, figs. 4,5. Without doubt the speci- 
men figured by Binney (f. 10) as Swmassi, 
Baird ?, belongs also to this species. 
Subgenus AU RICULA, Klein. 
6. LIMNAZA STAGNALIS, Zinn. 
Hald., 16, t. 4, L. jugularis, Say. 
Hald., 18, t. 5, L. appressa, Say, 
Plate 16, fig. 11. 
This very fine species inhabits our whole 
north-western frontier States from Ohio to 
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