Miocene to Late Pleistocene; Recent.
Southern Florida to Virginia.
Original Description (from Say, 1822, p. 247-248):
"Shell thick, sub-globose, cinereous, with a black line revolving on the spire above the suture, and becoming gradually diluted, dilated, and obsolete in its course; within brownish livid; a large incrassated callous of the same colour extends beyond the columella, and nearly covers the umbilicus from above; umbilicus with a profound sulcus or duplication.
Greatest length about two inches. Greatest breadth rather more.
Inhabits the coast of the United States.
Cabinet of the Academy and Philadelphia Museum.
Very numerous upon almost the whole extent of our coast. The spire in some specimens is much more elevated than in others, and the duplication within the umbilicus, is sometimes partially concealed by the projecting callous.
In the collection of the Academy of Natural Sciences, is a species from Candia, presented by Mr. S. Hazard, which very much resembles this, but it differs in being destitute of the black line, and in having the umbilicus partially covered from the side, leaving only a linear, semicircular, lateral opening. Another specimen from India strongly resembles it, and is also marked with the black line, but there is only a circumscribed callous extending laterally, leaving a large umbilicus, and marked transversely by a groove.
I formerly referred this species to N. rugosa, but it appears to be a much larger species, as Dillwyn states the rugosa to be only ten lines long. It is probably the same species as that represented by Lister on plates 562 and 563, but I do not find those figures referred to at all by Dillwyn."
To access this description in its original formatting through the Biodiversity Heritage Library, click here.