iew" on Physics and Politics.

Bahia Blanca, collection of plants from.

Bailey, on Heterocentron roseum.

Baillon, on pollen-tubes of Helianthemum.

Baker's Flora of the Mauritius and Seychelles.

Balancement, G. St. Hilaire's law of.

Balanidae, Darwin's work on.

Balanus, questions of nomenclature.

Balfour, F.M. (1851-82): Professor of Animal Morphology at Cambridge.
He was born 1851, and was killed, with his guide, on the Aiguille
Blanche, near Courmayeur, in July 1882. (See "Life and Letters," III.,
page 250.)
-letter to.
-mentioned.

Ball, J., on origin of Alpine flora.

Ball, P., "The effects of Use and Disuse."

Balsaminaceae, genera of.

Banks' Cove, volcano of.

Barber, C., on graft-hybrids of sugar-cane.

Barber, Mrs., on Papilio nireus.

Barberry, abundance in N. America.
-dispersal of seeds by birds.
-Lord Farrer and H. Muller on floral mechanism.
-movement of stamens.

Barbs, see Pigeons.

Bardfield Oxlip (Primula elatior).

Barnacles, Darwin's work on.
-metamorphosis in.
-F. Muller on.
-nomenclature.
-of Secondary Period.
-advance in.
-complemental males compared with plants.

Barneoud, on irregular flowers.

"Baronne Prevost," Rivers on the rose.

Barrande, Joachim (died 1883): devoted himself to the investigation of
the Palaeozoic fossils of Bohemia, his adopted country. His greatest
work was the "Systeme Silurien de la Boheme," of which twenty-two
volumes were published before his death. He was awarded the Wollaston
Medal of the Geological Society in 1855. Barrande propounded the
doctrine of "colonies." He found that in the Silurian strata of
Bohemia, containing a normal succession of fossils, exceptional bands
occurred which yielded fossils characteristic of a higher zone. He
named these bands "colonies," and explained their occurrence by
supposing that the later fauna represented in these "precursory bands"
had already appeared in a neighbouring region, and that by some means
communication was opened at intervals between this region and that in
which the normal Silurian series was being deposited. This apparent
intercalation of younger among older zones has now been accounted for by
infoldings and faulting of the strata. See J.E. Marr, "On the Pre-
Devonian Rocks of Bohemia," "Quart. Journ. Geol. Soc." Volume XXXVI.,
page 591 (1880); also "Defense des Colonies," by J. Barrande (Prag,
1861), and Geikie's "