on 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 varieti