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SIR HENRY HOLLAND, BART., M.D.,
MY DEAR SIR HENRY,
IN giving myself the pleasure to dedicate, as I now do, this work to you, it is not my intention to identify you with any views of my own advocated in it.
I simply avail myself of an opportunity of paying a tribute of esteem and regard to my earliest scientific friend-the first to encourage me in pursuing the study of nature.
MY DEAR SIR HENRY,
Ever faithfully yours,
7, NORTH BANK, REGENT'S PARK, December 8, 1870.
ST. GEORGE MIVART.
The problem of the genesis of species stated.-Nature of its probable
solution.-Importance of the question.-Position here defended.—
Statement of the DARWINIAN THEORY-Its applicability to details of
geographical distribution; to rudimentary structures; to homology; to
mimicry, &c.-Consequent utility of the theory-Its wide acceptance.
-Reasons for this other than, and in addition to, its scientific value-
Its simplicity-Its bearing on religious questions.-Odium theologicum
and odium antitheologicum.-The antagonism supposed by many to
exist between it and theology neither necessary nor universal. —
Christian authorities in favour of evolution. -Mr. Darwin's "Animals
and Plants under Domestication."-Difficulties of the Darwinian
to sea-urchins; as to certain processes of metamorphosis; as to the
mammary gland; as to certain ape characters; as to the rattlesnake
and cobra; as to the process of formation of the eye and ear; as to
the fully developed condition of the eye and ear; as to the voice; as
to shell-fish; as to orchids; as to ants.-The necessity for the simulta-
neous modification of many individuals.-Summary and conclusion.
Chances against concordant variations-Examples of discordant ones.-
Concordant variations not unlikely on a non-Darwinian evolutionary
hypothesis.—Placental and implacental mammals.—Birds and reptiles.
- Independent origins of similar sense organs.-The ear.-The eye.
Other coincidences.-Causes besides "Natural Selection" produce con-
cordant variations, in certain geographical regions.-Causes besides
"Natural Selection" produce concordant variations, in certain zoological
and botanical groups.-There are homologous parts not genetically
related.-Harmony in respect of the organic and inorganic worlds.—
There are difficulties as to minute modifications, even if not fortuitous.-
Examples of sudden and considerable modifications of different kinds.
Professor Owen's view.-Mr. Wallace.-Professor Huxley.-Objections
to sudden changes.—Labyrinthodont.-Potto.-Cetacea.—As to origin
of bird's wing.-Tendrils of climbing plants. -Animals once supposed
to be connecting links.—Early specialization of structure.-Macrau-
chenia.- Glyptodon.-Sabre-toothed tiger.-Conclusion Page 109