European plants in.
-frequency of earthquakes.
-D. Forbes on geology of.
-W. Jameson on geology of.
-D'Orbigny on.
-volcanic eruptions.
-Wallace opposed to continent uniting New Zealand, Australia and.

American War.

Ammonia, Darwin's work on effect on roots of carbonate of.

Ammonites, degeneration of.
-reversion.
-of S. America.

Amsinckia.

Amsinckia spectabilis, dimorphism of.

Anacamptis (=Orchis pyramidalis), fertilisation of.

Anacharis (=Elodea Canadensis), spread of.

Analogy, difference between homology and.

Anamorphism, Huxley on.

Anatifera, illustrating difficulty in nomenclature.

Anatomy of Vertebrata, Owen's attack on Darwin and Lyell in.

"Ancient Sea Margins," by R. Chambers.

Anderson-Henry, Isaac (1799?-1884): of Edinburgh, was educated as a
lawyer, but devoted himself to horticulture, more particularly to
experimental work on grafting and hybridisation. As President of the
Botanical Society of Edinburgh he delivered two addresses on
"Hybridisation or Crossing of Plants," of which a full abstract was
published in the "Gardeners' Chronicle," April 13th, 1867, page 379, and
December 21st, 1867, page 1296. See obit. notice in "Gardeners'
Chronicle," September 27th, 1884, page 400.
-letter to.

Andes, Darwin on geology of.
-high-road for European plants.
-comparatively recent origin.

Anemophilous plants, Delpino's work on.

Angiosperms, origin of.

Angraecum sesquipedale, Duke of Argyll on.

Animal Intelligence, Romanes on.

Animals, difference between plants and.
-resemblance to plants.

Annuals, adapted to short seasons.
-Hildebrand on percentages of.

Anoplotherium, occurrence in Eocene of S. America.

Ansted, David Thomas, F.R.S. (1814-80): Fellow of Jesus College, Cambridge,
Professor of Geology at King's College, London, author of several papers
and books on geological subjects (see "Quart. Journ. Geol. Soc." Volume
XXXVII., page 43.)
-letter to.

Antarctic continent, Darwin on existence of Tertiary.
-hypothetical.

"Antarctic Flora," Sir J.D. Hooker's.

Antarctic floras.
-Darwin at work on.

Antarctic islands, plants of.

Antarctic Land.

"Anti-Jacobin," quiz on Erasmus Darwin in.

"Antiquity of Man," Sir Charles Lyell's.
-cautious views on species.
-Darwin's criticism of.
-Extract on Natural Selection from.
-Falconer on.
-Owen's criticism on.

Antirrhinum, peloric flowers.

An