having been originally
breathed into matter under a few forms, perhaps into only one{525}, and
that whilst this planet has gone cycling onwards according to the fixed
laws of gravity and whilst land and water have gone on replacing each
other--that from so simple an origin, through the selection of
infinitesimal varieties, endless forms most beautiful and most wonderful
have been evolved.

{518} This sentence corresponds, not to the final section of the
_Origin_, Ed. i. p. 484, vi. p. 664, but rather to the opening
words of the section already referred to (_Origin_, Ed. i. p. 480,
vi. p. 657).

{519} This simile occurs in the Essay of 1842, p. 50, and in the
_Origin_, Ed. i. p. 485, vi. p. 665, _i.e._ in the final section of
Ch. XIV (vi. Ch. XV). In the MS. there is some erasure in pencil of
which I have taken no notice.

{520} An almost identical sentence occurs in the _Origin_, Ed. i.
p. 487, vi. p. 667. The fine prophecy (in the _Origin_, Ed. i. p.
486, vi. p. 666) on "the almost untrodden field of inquiry" is
wanting in the present Essay.

{521} See the last paragraph on p. 488 of the _Origin_, Ed. i., vi.
p. 668.

{522} A passage corresponding to this occurs in the sketch of 1842,
p. 51, but not in the last chapter of the _Origin_.

{523} This sentence occurs in an almost identical form in the
_Origin_, Ed. i. p. 490, vi. p. 669. It will be noted that man is
not named though clearly referred to. Elsewhere (_Origin_, Ed. i.
p. 488) the author is bolder and writes "Light will be thrown on
the origin of man and his history." In Ed. vi. p. 668, he writes
"Much light &c."

{524} For the history of this sentence (with which the _Origin of
Species_ closes) see the Essay of 1842, p. 52, note 2{Note 184}:
also the concluding pages of the Introduction.

{525} These four words are added in pencil between the lines.

INDEX

For the names of Authors, Birds, Mammals (including names of classes)
and Plants, see sub-indexes under _Authors_, _Birds_, _Mammals_ and
_Plants_.

Acquired characters, _see_ Characters

Affinities and classification, 35

America, fossils, 177

Analogy, resemblance by, 36, 82, 199, 205, 211

Animals, marine, preservation of as fossils, 25, 139, 141;
--marine distribution, 155, 196

Australia, fossils, 177

AUTHORS, NAMES OF:--