@misc{indiciae5cd8c0acac0c,
  title = {Principles of comparative physiology / Principles of comparative physiology. : [Supplementary material in Charles Darwin's copy] — Illustration, Page 28},
  year = {1854},
  url = {https://www.biodiversitylibrary.org/page/34067850},
  note = {Source identifier: page-34067850}
}