Description:
Anguispira alternata, called Helix alternata by Binney in 1878. Date: original: 1878, scan: 2007. Source: scanned image from Binney, WG. 1878. The Terrestrial Air-Breathing Mollusks of the United States and Adjacent Territories of North America, Vol. 5. (plates). Bull. Mus. Comparative Zool., Harvard. Plate 25. Author: William Greene Binney (1833-1909; U.S.A.), (scanned by Tim Ross).