AMNICOLA. 51 
Genus AMNICOLA, Gould & Haldeman. 
A. Species of the Atlantic and Middle States. 
4 
1. AMNICOLA PORATA, Say. 
Hald., p. 138, t. 1, fig. 8. 
It is by no means certain that this species is 
distinct from A. limosa, Say. Haldeman’s 
figure 6, “limosa,” I have always regarded as 
a form of porata, but the forms vary so much 
that the distinction appears to be quite arbi- 
trary. The species or form porata inhabits 
from New York to Utah, and far northward 
into British America, but it does not appear to 
extend into the Southern States; indeed, the 
genus appears to be nearly restricted to the 
area north of the Ohio River. 
(32) 
