@misc{indiciaec1366f1dd73f,
  title = {Manual of conchology, structural and systematic : with illustrations of the species. Second series, Pulmonata — Illustration, Plate 5},
  year = {1888},
  url = {https://www.biodiversitylibrary.org/page/23626257},
  note = {Source identifier: page-23626257}
}