de, on the succession of species
Artichoke, Jerusalem
Ascension, plants of
Asclepias, pollen of
Asparagus
Aspicarpa
Asses, striped
--improved by selection
Ateuchus
Aucapitaine, on land-shells
Audubon, on habits of frigate-bird
--on variation in birds' nests
--on heron eating seeds
Australia, animals of
--dogs of
--extinct animals of
--European plants in
--glaciers of
Azara, on flies destroying cattle
Azores, flora of
Babington, Mr., on British plants
Baer, Von, standard of Highness
--comparison of bee and fish
--embryonic similarity of the Vertebrata
Baker, Sir S., on the giraffe
Balancement of growth
Baleen
Barberry, flowers of
Barrande, M., on Silurian colonies
--on the succession of species
--on parallelism of palaeozoic formations
--on affinities of ancient species
Barriers, importance of
Bates, Mr., on mimetic butterflies
Batrachians on islands
Bats, how structure acquired
--distribution of
Bear, catching water-insects
Beauty, how acquired
Bee, sting of
--queen, killing rivals
--Australian, extermination of
Bees, fertilizing flowers
--hive, not sucking the red clover
--hive, cell-making instinct
--Ligurian
--variation in habits
Bees, parasitic
--humble, cells of
Beetles, wingless, in Madeira
--with deficient tarsi
Bentham, Mr., on British plants
--on classification
Berkeley, Mr.
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