Kentucky, caves of, 111.
Kerguelen-land, flora of, 341, 354.
Kidney-bean, acclimatisation of, 114.
Kidneys of birds, 115.

Kirby, on tarsi deficient in beetles,
108.

Knight, Andrew, on cause of varia-
tion, 5.

Kölreuter, on Intercrossing, 76.
on the barberry, 77.

on sterility of hybrids, 237.
on reciprocal crosses, 243.

on crossed varieties of nico-
tiana, 258.

on crossing male and herma-
phrodite flowers, 397.

Landois, on the development of the
wings of insects, 148.

Land-shells, distribution of, 353.

of Madeira, naturalised, 357.
-, resisting salt water, 353.
Languages, classification of, 371.
Lankester, Mr. E. Ray, on Longevity,
169.

—, on homologies, 385.
Lapse, great, of time, 266.
Larvæ, 388, 389.

Laurel, nectar secreted by the leaves,
73.

Laurentian formation, 287.
Laws of variation, 106.
Leech, varieties of, 59.
Leguminosæ, nectar secreted
glands, 73.

Leibnitz' attack on Newton, 421.
Lepidosiren, 83, 303.

by

limbs in a nascent condition,
398, 399.

Lewes, Mr. G. H., on species not hav-
ing changed in Egypt, 169.

-, on the Salamandra atra, 397.
on many forms of life having
been at first evolved, 425.
Life, struggle for, 49.
Lingula, Silurian, 286.
Linnæus, aphorism of, 365.
Lion, mane of, 69.

-, young of, striped, 388.
Lobelia fulgens, 57, 77.

-, sterility of crosses, 238.
Lockwood, Mr., on the ova of the
Hippocampus, 189.

Locusts transporting seeds, 327.
Logan, Sir W., on Laurentian forma-
tion, 287.

Lowe, Rev. R. J., on locusts visiting
Madeira, 327.

Lowness of structure connected with
variability, 118.

related to wide distribution,

359.
Lubbock, Sir J., on the nerves of
coccus, 35.

124.

on secondary sexual characters,

Lucas, Dr. P., on resemblance of child

to parent, 261.

Lund and Clausen, on fossils of
Brazil, 310.

Lyell, Sir C., on the struggle for
existence, 49.

-, on modern changes of the
earth, 75.

on terrestial animals not having
been developed on islands, 180.
on a carboniferous land-shell,
271.

on strata beneath Silurian
system, 287.

on the imperfection of the
geological record, 289.

on the appearance of species,
289.

-, on Barrande's colonies, 291.

on tertiary formations of
Europe and North America, 298.

on parallelism of tertiary for-
mations, 301.

on transport of seeds by ice-
pergs, 328.

-, on great alternations of cli-
mate, 342.

on the distribution of fresh-
water shells, 345.

on land-shells of Madeira,

357.
Lyell and Dawson, on fossilized trees
in Nova Scotia, 278.
Lythrum salicaria, trimorphic, 254.

Masters, Dr., on Saponaria, 174.
Matteucci, on the electric organs of
rays, 150.

Matthiola, reciprocal crosses of, 244.
Maurandia, 197.

Means of dispersal, 323.

Mellipona domestica, 220.

Merrell, Dr., on the American cuckoo,
212.
Metamorphism of oldest rocks, 287.
Mice destroying bees, 56.

acclimatisation of, 113.
tails of, 189.

Miller, Prof., on the cells of bees,
221, 224.

Mirabilis, crosses of, 243.
Missel-thrush, 59.

Mistletoe, complex relations of, 2.
Mivart, Mr., on the relation of hair
and teeth, 115.

- on the eyes of cephalopods,

151.

Naturalisation in New Zealand, 163.
Naudin, on analogous variations in
gourds, 125.

on hybrid gourds, 258.
on reversion, 260.
Nautilus, Silurian, 286.
Nectar of plants, 73.
Nectaries, how formed, 73.
Nelumbium luteum, 346.

Nests, variation in, 208, 228, 234.
Neuter insects, 230, 231.
Newman, Col., on humble-bees, 57.
New Zealand, productions of, not
perfect, 163.

naturalised products of, 309.
fossil birds of, 310.
glaciers of, 335.

crustaceans of, 338.

algæ of, 338.

flora of, 354.

Petrels, habits of, 142.
Phasianus, fertility of hybrids, 240.
Pheasant, young, wild, 211.
Pictet, Prof., on groups of species
suddenly appearing, 282.

on rate of organic change, 291.
on continuous succession of
genera, 293.

on change in latest tertiary
forms, 278.

on close alliance of fossils in
consecutive formations, 306.

on early transitional links, 283.
Pierce, Mr., on varieties of wolves,
71.

Pigeons with feathered feet and skin
between toes, 9.

-

15.

30.

breeds described, and origin of,

breeds of, how produced, 28,

Rengger, on flies destroying cattle,

56.

Reproduction, rate of, 50.
Resemblance, protective, of insects,

181.

to parents in mongrels and
hybrids, 260.
Reversion, law of inheritance, 11.

in pigeons, to blue colour, 127.
Rhododendron, sterility of, 239.
Richard, Prof., on Aspicarpa, 367.
Richardson, Sir J., on structure of
squirrels, 139.

on fishes of the southern hemi-
sphere, 338.

Robinia, grafts of, 246.

Rodents, blind, 110.

Rogers, Prof., Map of N. America,
274.

Rudimentary organs, 397.

Rudiments important for classifica-
tion, 367.

Rütimeyer, on Indian cattle, 14,