Leech, varieties of, 76.

Leguminosae, nectar secreted by glands, 92.

Lepidosiren, 107, 330.

Life, struggle for, 60.

Lingula, Silurian, 306.

Linnaeus, aphorism of, 413.

Lion:
mane of, 88.
young of, striped, 439.

Lobelia fulgens, 73, 98,

Lobelia, sterility of crosses, 250.

Loess of the Rhine, 384.

Lowness of structure connected with variability, 149.

Lowness, related to wide distribution, 406.

Lubbock, Mr., on the nerves of coccus, 46.

Lucas, Dr. P.:
on inheritance, 12.
on resemblance of child to parent, 275.

Lund and Clausen on fossils of Brazil, 339.

Lyell, Sir C.:
on the struggle for existence, 62.
on modern changes of the earth, 95.
on measure of denudation, 283.
on a carboniferous land-shell, 289.
on fossil whales, 303.
on strata beneath Silurian system, 307.
on the imperfection of the geological record, 310.
on the appearance of species, 312.
on Barrande's colonies, 313.
on tertiary formations of Europe and North America, 323.
on parallelism of tertiary formations, 328.
on transport of seeds by icebergs, 363.
on great alternations of climate, 382.
on the distribution of fresh-water shells, 385.
on land-shells of Madeira, 402.

Lyell and Dawson on fossilized trees in Nova Scotia, 296.

Macleay on analogical characters, 427.

Madeira:
plants of, 107.
beetles of, wingless, 135.
fossil land-shells of, 339.
birds of, 390.

Magpie tame in Norway, 212.

Maize, crossed, 270.

Malay Archipelago:
compared with Europe, 299.
mammals of, 395.

Malpighiaceae, 417.

Mammae, rudimentary, 451.

Mammals:
fossil, in secondary formation, 303.
insular, 393.

Man, origin of races of, 199.

Manatee, rudimentary nails of, 454.

Marsupials:
of Australia, 116.
fossil species of, 339.

Martens, M., experiment on seeds, 360.

Martin, Mr. W. C., on striped mules, 165.

Matteuchi on the electric organs of rays, 193.

Matthiola, reciprocal crosses of, 258.

Means of dispersal, 356.

Melipona domestica, 225.

Metamorphism of oldest rocks 308.

Mice:
destroying bees, 74.
acclimatisation of, 141.

Migration, bears on first appearance of fossils, 296.

Miller, Professor, on the cells of bees, 226.

Mirabilis, crosses of, 258.

Missel-thrush, 76.

M