Hallett, on varieties of wheat.

Hamilton, on fertilisation of Dampiera.

Hamilton, Sir W., on Law of Parsimony.

Hancock, Albany (1806-73): author of many zoological and palaeontological
papers. His best-known work, written in conjunction with Joshua Alder, and
published by the Ray Society is on the British Nudibranchiate Mollusca.
The Royal Medal was awarded to him in 1858.
-on British shells.
-and Royal medal.

Hanley, Dr., Darwin's visit to.

Harker, A., note on Darwin's work on cleavage and foliation.

Hartman, Dr., on Cicada septendecim.

"Harvesting Ants and Trap-door Spiders," Moggridge's.

Harvey, William Henry (1811-66): was the author of several botanical
works, principally on Algae; he held the botanical Professorship at
Trinity College, Dublin, and in 1857 succeeded Professor Allman in the
Chair of Botany in Dublin University. (See "Life and Letters," II.,
pages 274-75.)
-criticism of "Origin."
-Darwin's opinion of his book.
-letter to.
-mentioned.
-on variation in Fucus.

Haughton, Samuel (1821-97): author of "Animal Mechanics, a Manual of
Geology," and numerous papers on Physics, Mathematics, Geology, etc. In
November 1862 Darwin wrote to Sir J.D. Hooker: "Do you know whether
there are two Rev. Prof. Haughtons at Dublin? One of this name has made
a splendid medical discovery of nicotine counteracting strychnine and
tetanus? Can it be my dear friend? If so, he is at full liberty for
the future to sneer [at] and abuse me to his heart's content."
Unfortunately, Prof. Haughtons' discovery has not proved of more
permanent value than his criticism on the "Origin of Species."
-on Bees' cells.
-on depth of ocean.
-review by.
-mentioned.

Hawaiian Islands, Hillebrand's Flora.
-plants.

Hawks and owls as agents in seed-dispersal.
-bright colours in female.

Head, expression in movement of.

Hearne, on black bear.

Heat, action on rocks.

Heathcote, Miss.

Heaths, as examples of boreal plants in Azores.
-and climate.

Heberden, Dr., mentioned.

Hector.

Hedgehog, movements of spines.

Hedychium, Darwin's prediction as to fertilisation of.
-paraheliotropism.

Hedyotis, dimorphism of.

Hedysarum, Darwin's experiments on (see Desmodium gyrans).

Heer, Oswald (1809-83): was born at Niederutzwyl, in the Canton of St.
Gall, Switzerland, and for many years (1855-82) occupied the chair of
Botany in the University of Zuric