Illustrations and descriptions of new, unfigured, or imperfectly known shells, chiefly American, in the U. S. National Museum

The figured specimen is from Bermuda, collected by Goode, and is what Jones referred to S. brunnea Hanley. It appears to be merely a better-nourished, slightly darker-colored geographical race of the alternata of Say. If the S. picta Orbigny (1842) comprises only a single species, which is not yet certain, this species extends southward to Rio Janeiro, Brazil. It is somewhat singular that no good figure of Say's shell is to be found in the whole conchological literature of America, though the shell has been known (chiefly by bleached, worn specimens) for three-quarters of a century.