268 College of Forestry 
Genus Amnicota Gould and Haldeman. 
36. Ammicola limosa (Say). Fig. 45, No. 
This little snail is not as common in Oneida Lake as is 
lustrica, and was observed at but four stations, in but one 
of which it was common. The usual habitat is a sheltered 
bay on a sandy bottom in shallow water. It is widely dis- 
tributed throughout the eastern and central part of the 
United States and has been recorded from west of the 
Rocky Mountaims. At Isle Royale it was found on the 
under side of water lily leaves (p. 294). In the Saginaw 
Bay region it was noted on lily leaves and pond-weed, and 
on a sandy and gravelly bottom in shallow water (p. 170). 
Listed by Beauchamp from Onondaga County. The snails 
from Oneida Lake are small and not typical in form. 
Ammicola limosa has been observed in Vaucheria, probably 
using this alga as food. It is eaten by the Common White- 
fish, the Pumpkinseed, the Yellow Perch. 
37. Amynicola lustrica Pilsbry. Fig. 45, No. 20. 
This tiny snail was collected from ten stations, mostly 
protected bays, on a sandy bottom in one to two feet of 
water or on vegetation, lily leaves, submerged vegetation, 
ete. Rarely it was found on a bouldery exposed point. It 
is widely distributed throughout the United States. At Isle 
Royale it was collected on a muddy bottom in three to five 
feet of water (p. 294). In the Saginaw Bay region (Rush 
Lake) it was found in great abundance on a sandy bottom 
in two to four feet of water, and in less abundance on a 
marly bottom (p. 136). In the Georgian Bay region, it was 
dredged in 20 or more fathoms of water. Lustrica varies 
greatly in form and may include, under this name, more 
than one species, as has been the case with limosa. In Dr. 
H. A. Pilsbry’s monograph of New York Mollusca, now in 
preparation, this matter will doubtless be cleared. up and 
this interesting genus straightened out and its true species 
distinguished. This Amnicola is eaten by the Common 
Pas eS a 
