Imperfection of the Geological Record.
Ingenhousz, on plant physiology.
Inheritance of acquired characters.
Insects and Flowers.
Instinct.
Instincts, experimental control of animal.
Ipomaea purpurea.
Irish Elk, an example of co-adaptation.
Jacobian figures.
Jacoby, "Studies in Selection" by.
James, W.
Janczewski.
Jeans, J.H.
Jennings, H.S., on Paramoecium.
Jentsch.
Jespersen, Prof., Theory of.
Johannsen, on Species.
Jones, Sir William, on Language.
Jordan.
JUDD, J.W., on "Darwin and Geology".
Kallima, protective colouring of.
Kallima inachis.
Kammerer's experiments on Salamanders.
Kant, I.
Keane, on the Primates.
Keeble, F.W. and F.W. Gamble, on Colour-change.
Keith, on Anthropoid Apes.
Kellogg, V., on heliotropism.
Kepler.
Kerguelen Island.
Kidd.
Kidston, R., on fossil plants.
Killmann, on origin of human races.
King, Sir George.
Klaatsch, on Ancestry of Man.
Klaatsch and Hauser.
KLEBS, G., on "The influence of Environment on the forms of plants".
Kniep.
Knies.
Knight, A., experiments on plants by.
--on Geotropism.
Knight-Darwin law.
Knuth.
Kolliker, his views on Evolution.
Kolreuter, J.G.
Kohl.
Korschinsky.
Kowalevsky, on fossil horses.
Krakatau, Ernst on the Flora of.
Krause, E.
Kreft, Dr.
Kropotkin.
Kupelwieser, on hybridisation.
Lagopus hyperboreus.
Lamarck, his division of the Animal Kingdom.
--Darwin's opinion of.
--on Evolution.
--on Man.
--various.
Lamarckian principle.
Lamb, C.
Lamettrie.
Lamprecht.
Lanessan, J.L. de.
Lang.
Lange.
Language, Darwin on.
--Evolution and the Science of.
--various.
Lankester, Sir E. Ray, on degeneration.
--on educability.
--on the germ-plasm theory.
--elsewhere.
Lapouge, Vacher de.
Larmor, J.
Lartet, M.E.
Lassalle.
Lathyrus odoratus.
Lavelaye, de.
Lawrence, W.
Lehmann.
Lehmann-Nitsche.
Leibnitz.
Lepidium Draba.
Lepidoptera, variation in.
Leskien, A., on language.
Lessing.
Leucippus.
Levi, E.
Lewes, G.H.
Lewin, Capt.
Liapounoff.
Liddon, H.P.
Light, effect on organisms of.
Limenitis archippus.
--arthemis.
Linnaeus.
Livingstone, on plant-forms.
Llamas, geological history of.
Lockyer, Sir N.
Locy, W.A.
LOEB, J., on "The Experimental Study of the influence of environment on Animals.
Loew, E.
Longstaff, G.B., on the Scents of Butterflies.
Lorentz.
Lotsy, J.P.
Love, A.E.W.
Lovejoy.
Lubbock.
Lucas, K.
Lucretius, a poet of Evolution.
Lumholtz, C.
Luteva macrophthalma.
Lycorea halia.
Lyell, Sir Charles, and Darwin.
--the influence of.
--on geographical distribution.
--on "The Origin of Species".
--on the permanence of Ocean-basins.
--publication of the "Principles" by.
--the uniformitarian teaching of.
Lythrum salicaria.
Macacus, ear of.
MacDougal, on wounding.
Mach, E.
Macromytis flexuosa, colour-change in.
Magic and religion.
Mahoudeau.
Maillet, de.
Majewski.
Malthus, his influence on Darwin.
--various.
Mammalia, history of.
Man, Descent of.
--J.G. Frazer on some primitive theories of the origin of.
--mental and moral qualities of animals and.
--pre-Darwinian views on the Descent of.
--religious views of primitive.
--Tertiary flints worked by.
"Man", G. Schwalbe on Darwin's "Descent of".
Manouvrier.
Mantis religiosa, colour experiments on.
Marett, R.R.
Markwick.
Marshall, G.A.K.
Marx.
Massart.
Masters, M.
Matonia pectinata.
Matthew, P., and Natural Selection.
Maupertuis.
Maurandia semperflorens.
Mauss and Herbert.
Mauthner.
Maxwell.
Maxwell, Clerk.
Mayer, R.
Mechanitis lysimnia.
Meehan, T.
Meldola, R., Letters from Darwin to.
Melinaea ethra.
Mendel.
Mendeleeff.
Merrifield.
Merz, J.T.
Mesembryanthemum truncatum.
Mesohippus.
Mesopithecus.
Metschnikoff.
Mill, J.S.
Mimicry.
--H.W. Bates on.
--F. Muller on.
Mimulus luteus.
Miquel, F.W.A.
Mobius.
Mohl, H. von.
Moltke, on war.
Monachanthus viridis.
Monkeys, fossil.
Montesquieu.
Montgomery, T.H.
Monstrosoties.
Monticelli.
Moore, J.E.S.
MORGAN, C. LLOYD, on "Mental Factors in Evolution".
--on Organic Selection.
Morgan, T.H.
Morse, E.S., on colour.
Morselli.
Mortillet.
Moseley.
Mottier, M.
Muller, Fritz, "Fur Darwin" by.
--on Mimicry.
Muller, Fritz.
Muller, J.
Muller, Max, on language.
Murray, A., on geographical distribution.
Murray, G.
Mutability.
Mutation.
Myanthus barbatus.
Myers, G.W., on Eclipses.
Nageli.
Nathorst, A.G.
Nathusius.
Natural Selection, and adaptation.
--Darwin's views on.
--Darwin and Wallace on.
--and design.
--and educability.
--Fossil plants in relation to.
--and human development.
--and Mimicry.
--and Mutability.
--various.
Naudin.
Neandertal skulls.
Nemec.
Neoclytus curvatus.
Neodarwinism.
Neumayr, M.
Newton, A.
Newton, I.
Niebuhr.
Nietzsche.
Nilsson, on cereals.
Nitsche.
Noire.
Noll.
Novicow.
Nuclear division.
Nussbaum, M.
Nuttall, G.H.F.
Occam.
Odin.
Oecology, see Ecology.
Oenothera biennis.
Oenothera gigas.
Oenothera Lamarckiana.
Oenothera muricata.
Oenothera nanella.
Oestergren, on Holothurians.
Oken, L.
Oliver, F.W., on Palaeozoic Seeds.
Ononis minutissima.
Ophyrs apifera.
Orchids, Darwin's work on the fertilisation of.
Organic Selection.
"Origin of Species", first draft of the.
--geological chapter in the.
Orthogenesis.
Ortmann, A.E.
Osborn, H.F.
--"From the Greeks to Darwin" by.
Osthoff and Brugmann.
Ostwald, W.
Ovibos moschatus.
Owen, Sir Richard.
Oxford, Ashmolean Museum at.
Packard, A.S.
Palaeontological Record, D.H. Scott on the.
--W.B. Scott on the.
Palaeopithecus.
Paley.
Palitzch, G.
Palm.
Pangenesis.
Panmixia, Weismann's principle of.
Papilio dardanus.
Papilio meriones.
Papilio merope.
Papilio nireus.
Paramoecium, Jennings on.
Parker, G.H., on Butterflies.
Parkin, J. and E.A.N. Arber, on the origin of Angiosperms.
Parthenogenesis, artificial.
Paul, H. and Wundt.
Pearson, K.
Peckham, Dr and Mrs, on the Attidae.
Penck.
Penzig.
Peripatus, distribution of.
Peridineae.
Permanence of continents.
Perrier, E.
Perrhybris pyrrha.
Perthes, B. de.