riods.
-letter to.

Bog-Mammoth.

Boiler, comparison with volcano.

Boissier, on plants of S. Spain.

Boissiera, crossing experiments on.

Bolbophyllum, Darwin's account of.

Bolivia, geology of.

Bollaert's "Antiquities of S. America."

Bombus, diversity in generative organs.
-Psithyrus in nests of.
-Pollen-collecting apparatus of male.

Bombycilla, protective colours.

Bombyx, sexes in.

Bonaparte, L., on Basque and Finnish language.

Bonatea speciosa, F. Muller on.
-structure of flower.

Bonney's Edition of Darwin's "Coral Reefs."
-"Charles Lyell and Modern Geology."

Bonnier, G., on alpine plants.

Boragineae, dimorphism in.

Borneo, New Zealand and Australian plants in.
-temperate plants in lowlands.
-possible region for remains of early man.

Bory's Flora of Bourbon.

Bosquet, cirripede monograph sent by Darwin to.
-gives Darwin note on fossil Chthamalus.

Botanical collections (national) consolidation at Kew.

Botanist, Darwin as.

Botany, philosophical spirit in study of.

Boulders, transport of erratic (see also Erratic blocks).
-Darwin on Ashley Heath.
-in Glen Roy.
-on Moel Tryfan.

Bourbon, Bory's Flora of.

Bournemouth, Darwin's visit to.

Bovey Tracey, Heer on fossil plants of.

Bower, Prof. F.O., on Welwitschia.

Bower-bird, Bartlett's experiments on.
-colours discriminated by.

Bowman, W., Letters to.
-supplies Darwin with facts on Expression.

Brachiopods, Morse on.
-Silurian.

Brackish-water plants.

Bradshaw, H., translation of Hebrew letter by.

Brain, Owen on.
-evolution in man.
-Wallace on Natural Selection and Evolution of.

Branchipus, Schmankewitsch's experiments on.

Branta, mentioned in reference to nomenclature of Barnacles.

Brassica sinapistrum, germination at Down of old seeds.

Braun, A., convert to Darwin's views.

Bravais, on lines of old sea-level in Finmark.

Brazil, L. Agassiz's book on.
-Agassiz on glacial phenomena in.
-F. Muller's residence in.
-plants on mountains of.
-basalt in association with granite.
-Darwin on origin of lakes in.
-dimorphism of plants in S.

Bree, Dr., on Celts.
-misrepresents Darwin.

Breeders, views on Selection held by.

Breeding, chapter in "Origin" on.

Brehm, on birds.

Breitenbach, Dr.

Brewster, Sir D., on Glen Roy.

Bridgeman.

Brinton, Dr., attends Darwin.

British Association,
Meetings: Belfast (1