The zoology of the voyage of H.M.S. Beagle, under the command of Captain Fitzroy, R. N., during the years 1832 to 1836. Edited by Charles Darwin. 5 pts in 3 vols. London: Smith, Elder, 1840 – 1843.
Part 1: Fossil mammalia by Richard Owen; Part 2: Mammalia by George Waterhouse; Part 3: Birds by John Gould; Part 4: Fish by Leonard Jenyns; Part 5: Reptiles by Thomas Bell. Digital facsimile from the Internet Archive at this link.
Subjects: COUNTRIES, CONTINENTS AND REGIONS › Ecuador, EVOLUTION, NATURAL HISTORY, VOYAGES & Travels by Physicians, Surgeons & Scientists, ZOOLOGY, ZOOLOGY › Herpetology, ZOOLOGY › Ichthyology, ZOOLOGY › Mammalogy, ZOOLOGY › Ornithology