AMNICOLA. 55 
lieve the young of other species have been 
mistaken for it, and I think it probable that 
the habitat is quite restricted. I have ex- 
amined Amnicole bearing this specific name 
from various localities, but invariably found 
them to be—something else. 
B. Species of the Pacific States. 
8. AMNICOLA LONGINQUA, Gould. 
Plate 17, fig. 5. 
“Shell small, elongate-ovate, smooth ; apex 
obtuse; whorls five, rounded; suture deep ; 
aperture elliptical, rounded posteriorly; colu- 
mella very arcuate, subperforate.” 
Alt. 8, diam. 2°65 mill. 
Colorado Desert, Cal. 
Resembles Cincinnatiensis in general aspect, 
but the outline of the spire is more convex and 
the aperture is more appressed to the body. 
(36) 
