@misc{indiciae5eff20fd1456,
  title = {Principles of zoölogy : touching the structure, development, distribution, and natural arrangement of the races of animals, living and extinct, with numerous illustrations : part I, Comparative physiology, for the use of schools and colleges — Illustration, Page 45},
  year = {1853},
  url = {https://www.biodiversitylibrary.org/page/1364183},
  note = {Source identifier: page-1364183}
}