n Darwin's theory.

Lantana, in Ceylon.

Lanugo, on human foetus.

Lapland, richness of flora.

Latania Lodigesii, peculiar to Round Island.

Latent characters, tendency to appear temporarily in youth.

Lathyrus aphaca.
-L. grandiflorus, fertilisation of.
-L. nissolia, evolution of.
-explanation of grass-like leaves.
-Darwin on.
-L. maritimus, bloom on.
-L. odoratus, fertilisation of.
-intercrossing of varieties.

Lauder-Dick, Sir Thomas, on Parallel Roads of Glen Roy.

Laurel, extra-floral nectaries of.

Lava, Darwin and Scrope on separation of constituent minerals of.
-Elie de Beaumont's measurements of inclination of.
-fluidity of.
-junction between dykes and.
-and metamorphic schists.
-Scrope on basaltic and trachytic.
-subsidence due to outpouring of.

Law, of balancement.
-of growth.
-of higgledy-piggledy.
-of perfectibility by Nageli.
-of sterility.
-of succession.
-of variation.

Lawes, Sir J.B., and Sir J.H. Gilbert, Rothamsted experiments.

Laxton, T., close on the trail of Mendelian principle.

"Lay Sermons," Huxley's.

Leaves, movements of.
-used by worms in plugging burrows.

Lebanon, glacial action on.
-plants of.
-Hooker on Cedars of.

Lecky, Rt. Hon. W.E.H., Darwin's interest in book by.
-quoted in "Descent of Man."

Lecoq, "Geographie Botanique."
-on self-sterility.
-mentioned.

Lectures, Darwin on Edinburgh University, (see also Hooker and Huxley).
-Max Muller's, on Science of Language.

Ledebour, allusion to book by.

Leeds, address by Owen at.

Leersia oryzoides, cleistogamic flowers of.

Leggett, W.H., on Rhexia virginica.

Legitimate unions, heteromorphic or.

Leguminosae, absence in Greenland.
-absent in New Zealand.
-anomalous genera in.
-crossing in.
-scarcity in humid temporate regions.
-seeds of.
-example of inherited pelorism in.
-Lord Farrer's observations on fertilisation of.
-nectar-holders in flowers.
-reason for absence of.

Leibnitz, rejection of theory of gravity by.

Lemuria, continent of.

Lepadidae, Darwin's work on, (see also Barnacles).
-fossil.

Lepas, nomenclature of.

Lepidodendron.

Lepidoptera, Sexual Selection in.
-breeding in confinement.
-F. Muller on mimicry in.
-protection afforded by wings.
-want of colour-perception.
-Weir on apterous.

Lepidosiren, reason for preservation of.

Leptotes.

Leschenaultia, fertilisation mechanism.