PREFACE TO SECOND EDITION.
The present edition is a reprint of the first, with a few verbal corrections and the alteration of some erroneous or doubtful statements.
Of these latter the following are the most important:-- _P._ 30.

The statement as to the fulmar petrel, which Professor A.
Newton assures me is erroneous, has been modified.
_P._ 34.

A note is added as to Darwin's statement about the missel and song-thrushes in Scotland.
_P._ 172.

An error as to the differently-coloured herds of cattle in the Falkland Islands, is corrected.
PARKSTONE, DORSET _August, 1889_..