II., p. 236: for _western_ side of Aru read _eastern_.
Page 315: Do you not mean the horns of the moose? For the elk has not
palmated horns.
I have only one criticism of a general nature, and I am not sure that
other geologists would agree with me: you repeatedly speak as if the
pouring out of lava, etc., from volcanoes actually caused the subsidence
of an adjoining area. I quite agree that areas undergoing opposite
movements are somehow connected; but volcanic outbursts must, I think,
be looked at as mere accidents in the swelling tip of a great dome or
surface of _plutonic_ rocks; and there seems no more reason to conclude
that such swelling or elevation in mass is the cause of the subsidence
than that the subsidence is the cause of the elevation; which latter
view is indeed held by some geologists, I have regretted to find so
little about the habits of the many animals which you have seen.
In Vol. II., p. 399, I wish I could see the connection between
variations having been first or long ago selected, and their appearance
at an earlier age in birds of paradise than the variations which have
subsequently arisen and been selected.
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