Tail of giraffe --of aquatic animals --prehensile --rudimentary
Tanais, dimorphic
Tarsi deficient
Tausch, Dr., on umbelliferae
Teeth and hair correlated --rudimentary, in embryonic calf
Tegetmeier, Mr., on cells of bees
Temminck, on distribution aiding classification
Tendrils, their development
Thompson, Sir W., on the age of the habitable world --on the consolidation of the crust of the earth
Thouin, on grafts
Thrush, aquatic species of --mocking, of the Galapagos --young of, spotted --nest of
Thuret, M., on crossed fuci
Thwaites, Mr., on acclimatisation
Thylacinus
Tierra del Fuego, dogs of --plants of
Timber-drift
Time, lapse of --by itself not causing modification
Titmouse
Toads on islands
Tobacco, crossed varieties of
Tomes, Mr., on the distribution of bats
Transitions in varieties rare
Traquair, Dr., on flat-fish
Trautschold, on intermediate varieties
Trees on islands belong to peculiar orders --with separated sexes
Trifolium pratense --incarnatum
Trigonia
Trilobites --sudden extinction of
Trimen, Mr., on imitating-insects
Trimorphism in plants
Troglodytes
Tuco-tuco, blind
Tumbler pigeons, habits of, hereditary --young of
Turkey-cock, tuft of hair on breast
Turkey, naked skin on head --young of, instinctively wild
Turnip and cabbage, analogous variations of
Type, unity of
Types, succession of, in same areas
Typotherium
Udders enlarged by use --rudimentary
Ulex, young leaves of
Umbelliferae, flowers and seeds of --outer and inner florets of
Unity of type
Uria lacrymans
Use, effects of --under domestication --in a state of nature
Utility, how far important in the construction of each part
Valenciennes, on fresh-water fish
Variability of mongrels and hybrids
Variation, under domestication --caused by reproductive system being affected by conditions of life --under nature --laws of --correlated
Variations appear at corresponding ages --analogous in distinct species
Varieties, natural --struggle between --domestic, extinction of --transitional, rarity of
Varieties, when crossed --fertile --sterile --classification of
Verbascum, sterility of --varieties of, crossed
Verlot, M., on double stocks
Verneuil, M. de, on the succession of species
Vibracula of the Polyzoa
Viola, small imperfect flowers of --tricolor
Virchow, on the structure of the crystalline lens
Virginia, pigs of
Volcanic islands, denudation of
Vulture, naked skin on head
Wading-birds
Wagner, Dr., on Cecidomyia
Wagner, Moritz, on the importance of isolation
Wallace, Mr., on origin of species --on the limit of variation under domestication --on dimorphic lepidoptera --on races in the Malay Archipelago --on the improvement of the eye --on the walking-stick insect --on laws of geographical distribution --on the Malay Archipelago --on mimetic animals
Walsh, Mr. B.D., on phytophagic forms --on equal variability
Water, fresh, productions of
Water-hen
Waterhouse, Mr., on Australian marsupials --on greatly developed parts being variable --on the cells of bees --on general affinities
Water-ouzel
Watson, Mr. H.C., on range of varieties of British plants --on acclimatisation --on flora of Azores --on rarity of intermediate varieties --on Alpine plants --on convergence --on the indefinite multiplication of species
Weale, Mr., on locusts transporting seeds
Web of feet in water-birds
Weismann, Prof., on the causes of variability --on rudimentary organs
West Indian islands, mammals of
Westwood, on species in large genera being closely allied to others --on the tarsi of Engidae --on the antennae of hymenopterous insects
Whales
Wheat, varieties of
White Mountains, flora of
Whittaker, Mr., on lines of escarpment
Wichura, Max, on hybrids
Wings, reduction of size --of insects homologous with branchiae --rudimentary, in insects
Wolf crossed with dog --of Falkland Isles
Wollaston, Mr., on varieties of insects --on fossil varieties of shells in Madeira
Wollaston, Mr., on colours of insects on sea-shore --on wingless beetles --on rarity of intermediate varieties --on insular insects --on land-shells of Madeira naturalised
Wolves, varieties of
Woodcock with earth attached to leg
Woodpecker, habits of --green colour of
Woodward, Mr., on the duration of specific forms --on Pyrgoma --on the continuous succession of genera --on the succession of types
World, species changing simultaneously throughout
Wright, Mr. Chauncey, on the giraffe --on abrupt modifications
Wrens, nest of
Wyman, Prof., on correlation of colour and effects of poison --on the cells of the bee
Youatt, Mr., on selection --on sub-breeds of sheep --on rudimentary horns in young cattle
Zanthoxylon
Zebra, stripes on
Zeuglodons