n Paraguay
--striped

Horticulturists, selection applied by

Huber on cells of bees

Huber, P., on reason blended with instinct
--on habitual nature of instincts
--on slave-making ants
--on Melipona domestica

Hudson, Mr., on the Ground-woodpecker of La Plata
--on the Molothrus

Humble-bees, cells of

Hunter, J., on secondary sexual characters

Hutton, Captain, on crossed geese

Huxley, Prof., on structure of hermaphrodites
--on the affinities of the Sirenia
--on forms connecting birds and reptiles
--on homologous organs
--on the development of aphis

Hybrids and mongrels compared

Hybridism

Hydra, structure of

Hymenoptera, fighting

Hymenopterous insect, diving

Hyoseris

Ibla

Icebergs transporting seeds

Increase, rate of

Individuals, numbers favourable to selection
--many, whether simultaneously created

Inheritance, laws of
--at corresponding ages

Insects, colour of, fitted for their stations
--sea-side, colours of
--blind, in caves
--luminous
--their resemblance to certain objects
--neuter

Instinct, not varying simultaneously with structure

Instincts, domestic

Intercrossing, advantages of

Islands, oceanic

Isolation favourable to selection

Japan, productions of

Java, plants of

Jones, Mr. J.M., on the birds of Bermuda

Jordain, M., on the eye-spots of star fishes

Jukes, Prof., on subaerial denudation

Jussieu on classification

Kentucky, caves of

Kerguelen-land, flora of

Kidney-bean, acclimatisation of

Kidneys of birds

Kirby, on tarsi deficient in beetles

Knight, Andrew, on cause of variation

Kolreuter, on intercrossing
--on the barberry
--on sterility of hybrids
--on reciprocal crosses
--on crossed varieties of nicotiana
--on crossing male and hermaphrodite flowers

Lamarck, on adaptive characters

Lancelet, eyes of

Landois, on the development of the wings of insects

Land-shells, distribution of
--of Madeira, naturalised
--resisting salt water

Languages, classification of

Lankester, Mr. E. Ray, on longevity
--on homologies

Lapse, great, of time

Larvae

Laurel, nectar secreted by the leaves

Laurentian formation

Laws of variation

Leech, varieties of

Leguminosae, nectar secreted by glands

Leibnitz, attack on Newton

Lepidosiren, limbs in a nascent condition

Lewes,