h. While eminent as an entomologist Heer
is chiefly known as a writer on Fossil Plants. He began to write on
palaeobotanical subjects in 1841; among his most important publications,
apart from the numerous papers contributed to scientific societies, the
following may be mentioned: "Flora Tertiaria Helvetiae," 1855-59; the
"Flora Fossilis Arctica," 7 volumes, 1869-83; "Die Urwelt der Schweiz,"
1865; "Flora Fossilis Helvetiae," 1876-7. He was awarded the Wollaston
medal of the Geological Society in 1874, and in 1878 he received a Royal
medal. (Oswald Heer, "Bibliographie et Tables Iconographiques," par G.
Malloizel, precede d'une Notice Biographique" par R. Zeiller; Stockholm.)
-on continental extension.
-on plants of Madeira.
-on origin of species from monstrosities.
-Darwin sends photograph to.
-"Flora fossilis arctica."
-letter to.

Heeria (see also Heterocentron).
-F. Muller on.

Heifers, and sterility.

Helianthemum, Baillon's observations on pollen.

Heligoland, birds alight on sea near.

Heliotropism, experiments on.
-of roots.

Hemsley, W.B., mentioned.

Hennessey.

Henry, I.A. (see Anderson-Henry)
-letter to.

Henslow, Prof. J.S., life of.
-Darwin's affection for.
-Darwin's Cambridge recollections of.
-death of.
-letters to.
-mentioned.
-on Mus messorius.
-visits Down.
-Darwin on his parish work.
-work on crossing.

Henslow, Miss, mentioned.

Herbaceous orders, in relation to trees.

Herbert, Dean, on heaths of S. Africa.
-on Polygala.
-on Cytisus Adami.
-on self-fertility of Hippeastrum.
-mentioned.

"Hereditary Genius," Francis Galton's.

Hereditary Improvement, Francis Galton on.

Heredity, Darwin's criticism of Galton's theory.

Hermaphroditism, in trees.
-Weir on Lepidoptera and.
-and nature of generative organs.

Herminium monorchis.

Heron, Sir R., on peacocks and colour.

Herons, as fruit-feeders.

Herschel, Sir J.F.W., edits "Manual of Scientific Enquiry."
-on Natural Selection.
-on the "Origin."
-"Physical Geography."
-on providential laws.
-on heating of rocks.
-on importance of generalising.
-on study of languages.
-versus Lyell on volcanic islands.
-mentioned.

Heteranthera, two kinds of stamens.
-H. reniformis.

Heterocentron, experiments on.
-seeds of.
-two kinds of stamens.
-H. roseum, fertilisation mechanism of.

Heterogeny, Owen on.

Heteromorphic, use of term.