@misc{indiciae4f1ee9ccd75b,
  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 74},
  year = {1851},
  url = {https://www.biodiversitylibrary.org/page/1380708},
  note = {Source identifier: page-1380708}
}