alternata = alternate [latin] ; likely refering to alternating color pattern typical of these shells
Shell somewhat convex, fuscus varied or alternating with pale rays; whorls five striated across with raised equi-distant acute lines forming grooves between them. Aperture thin and brittle; lip regularly curved within glossed with perlaceous, and when placed before the light the fucus lines appear sanguineous. Umbillicus large, exhibiting all the volutions. Three-fourths of an inch wide. Inhabits the middle states.
Original Description Citation:
Say, T. (1817). Conchology. - In: Nicholson, W.: American edition of the British Encyclopedia, or, dictionary of arts and sciences comprising an accurate and popular view of the present improved state of human knowledge. First Edition, A-3 - C-6 [= 1-20], pl. [1-4]. page(s): [unpaginated], pl. 1, fig. 2
Nature Serve Conservation Status: