@misc{indiciae469c12651c16,
  title = {Principles of comparative physiology / Principles of comparative physiology. : [Supplementary material in Charles Darwin's copy] — Illustration, Page 58},
  year = {1854},
  url = {https://www.biodiversitylibrary.org/page/34067918},
  note = {Source identifier: page-34067918}
}