--influence on environment on.

--Lamarck on.

--multiple origin of.

--the nature of a.

--polymorphic.

--production by physico-chemical means of.

--and varieties.

--de Vries's work on.

Spencer, H., on evolution.

--on Lyell's "Principles".

--on the nature of the living cell.

--on primitive man.

--on the theory of Selection.

--on Sociology.

Spencer, H., on the transmission of acquired characters.

--on Weismann.

--various.

Sphingidae, variation in.

Spinoza.

Sports.

Sprengel, C.K.

Stability, principle of.

Stahl.

Standfuss.

Stars, evolution of double.

Stellaria media.

Stephen, L.

Sterility in hybrids.

Sterne, C.

Stockard, his experiments on fish embryos.

STRASBURBER, E., on "The Minute Structure of Cells in relation to Heredity".

Strongylocentrotus franciscanus.

Strongylocentrotus purpuratus.

Struggle for existence.

Strutt, R.J.

Stuart, A.

Sturdee, F.C.D.

Sutterlin, L.

Sully.

Sutton, A.W.

Sutton, W.S.

Svalof, agricultural station of.

Swainson, W.

Synapta, calcareous bodies in skin of.

S. lappa.

Syrphus.

Tarde, G.

Teleology and adaptation.

Tennant, F.R.

Teratology.

Tetraprothomo.

THISELTON-DYER, SIR WILLIAM, on "Geographical distribution of Plants".

--on Burchell.

--on protective resemblance.

--elsewhere.

THOMSON, J.A., on "Darwin's Predecessors.

--elsewhere.

--and P. Geddes.

Thomson, Sir J.J.

Theology, Darwin and.

Tiedemann, F.

Tooke, Horne.

Totemism.

Treschow.

Treviranus.

Trifolium pratense quinquefolium.

Trigonias.

Trilobites, phylogeny of.

Tschermack.

Turgot.

Turner, Sir W.

Twins, artificial production of.

Tylor.

Tyndall, W.

Tyrrell, G.

Uhlenhuth, on blood reactions.

Underhill, E.

Use and disuse.

Vanessa.

Vanessa antiope.

Vanessa levana.

Vanessa polychloros.

Vanessa urticae.

Van 't Hoff.

Varanus Salvator.

Variability, Darwin's attention directed to.

--W. Bateson on.

--and cultivation.

--causes of.

--polymorphic.

Variation, continuous and discontinuous.

--Darwin's views as an evolutionist, and as a systematist, on.

--definite and indefinite.

--environment and.

--and heredity.

--as seen in the life-history of an organism.

--minute.

--mutability and.

--in relation to species.

--H. de Vries on.

Varigny, H. de.

Varro, on language.

Veronica chamaedrys.

Verworn.

"Vestiges of Creation", Darwin on "The".

Vierkandt.

Vilmorin, L. de.

Virchow, his opposition to Darwin.

Virchow, on the transmission of acquired characters.

Vochting.

Vogt, C.

Voltaire.

Volvox.

VRIES, H. de, on "Variation"

--the Mutation theory of.

WAGGETT, REV. P.N., on "The Influence of Darwin upon religious thought".

Wagner.

Waldeyer, W.

Wallace, A.R., on Malayan Butterflies.

--on Colour.

--and Darwin.

--on the Descent of Man.

--on distribution.

--on Malthus.

--on Natural Selection.

--on the permanence of continents.

--on social reforms.

--on Sexual Selection.

Waller, A.D.

Walton.

Watson, H.C.

Watson, S.

Watt, J., and Natural Selection.

Watts, W.W.

Wedgwood, L.

Weir, J.J.

WEISMANN, A., on "The Selection Theory".

--on Amphimixis.

Weismann, A., his germ-plasm theory.

--on ontogeny.

--and Prichard.

--and Spencer.

--on the transmission of acquired characters.

--various.

Wells, W.C., and Natural Selection.

Weston, S., on language.

WHETHAM, W.C.D., on "The Evolution of Matter".

Whewell.

White, G.

Wichmann.

Wieland, G.R., on fossil Cycads.

Wiesner, on Darwin's work on plant movements.

Williams, C.M.

Williamson, W.C.

Wilson, E.B., on cytology.

--letter from Darwin to.

Wolf.

Wollaston's, T.V. "Variation of Species".

Woltmann.

Woolner.

Wundt, on language.

Xylina vetusta.

Yucca, fertilisation of.

Zeiller, R., on Fossil Plants.

Zeller, E.

Zimmermann, E.A.W.

Zittel, on palaeontological research.

"Zoonomia", Erasmus Darwin's.

End