Keynes, Richard ed. 2000. Charles Darwin's zoology notes & specimen lists from H.M.S. Beagle. Cambridge: Cambridge University Press. 23 – August 1836, 291–293Archived 2011-05-23 at the वेबैक मशीन
Keynes, Richard ed. 2000. Charles Darwin's zoology notes & specimen lists from H.M.S. Beagle. Cambridge: Cambridge University Press. 23 – August 1836, 291–293Archived 2011-05-23 at the वेबैक मशीन