@misc{indiciae51367ae415b1,
  title = {Mollusks, Echinoderms, Coelenterates, etc. Part C Echinoderms — Illustration, BHL page 41715509},
  year = {1920},
  url = {https://www.biodiversitylibrary.org/page/41715509},
  note = {Source identifier: page-41715509}
}