on of ice in formation of.
-Dana on Australian.
-Darwin on origin of.

Valparaiso.

Van Diemen's Land, flora of, in relation to New Zealand.

Vanda.

Vandeae, structure of ovary.

Vanessa, two sexual forms of.
-breeding in confinement.
-colour of.

Vanilla.

Variability, backward tendency of.
-Bentham on.
-causes of.
-De Candolle on.
-dependent more on nature of organism than on environment.
-Huxley and Scott on.
-importance of subject of cause of.
-Natural Selection and.
-in oaks.
-greater in bisexual than in unisexual plants.
-of ferns "passes all bounds."
-greater in male than female.
-in ovaries of flowers.
-tendency of genera at different periods towards.

Variation.
-an innate principle.
-Bates on.
-in blackbirds.
-causes of.
-centrifugal nature of.
-checked by Natural Selection.
-climate and.
-Darwin attaches importance to useless.
-Darwin on favourable.
-divergence of.
-and external conditions.
-in elephants.
-in Fucus.
-of large genera.
-laws of.
-of monotypic and polytypic genera.
-and monstrosities.
-and Natural Selection.
-ordination and.
-in peaches.
-in plants.
-produced by crossing.
-rate of action of.
-of small genera.
-sterility advantageous to.
-Weismann on.
-galls as cause of.
-and loss of dimorphism in Primula and Auricula.
-Sexual Selection and minute.
-transmission to sexes.
-Verlot on.
-Wallace on.

"Variation of Animals and Plants under Domestication," completion of.
-delay in publication.
-Lyell on.
-translation of.
-Wallace's opinion of.
-Darwin at work on.

Varieties, accumulation of.
-distinction between species and.
-fertility of.
-in insects.
-in large genera.
-of molluscs.
-production of.
-species the product of long series of.
-use of.
-Wallace on.
-elimination by crossing.
-zoologists neglect study of.

Vaucher, "Plantes d'Europe."

"Vegetable Teratology," Masters'.

Vegetative reproduction, Darwin on.

Veitch, J.

Velleia, fertilisation mechanism of.

Verbascum, crossing and varieties in.
-Scott's work on.

Verbenaceae.

Verlot, on variation in flowers.

Veronica, Antarctic species of.

Vessels, course of, as guide to morphology of flowers.

"Vestiges of Creation," Huxley's review of.
-the "Origin of Species" and.
-Vetch, extra-floral nectaries of.

Vetter, editor of "Kosmos."

Viburnum lantanoides, in Japan and east U.S.