red clay of, [265]
zoology of, [266]
reptiles of, [266]
birds of, [266]
insects of, [269]
land-mollusca of, [270]
flora of, [271]
Bermuda and Azores, comparison of bird-faunas of, [268]
Bernicla sandvichensis, [314]
Biological causes which determine distribution, [532]