Appendix, vermiform, 83.

Appreciation of Mr. Darwin, 10.

Apteryx, 7, 70.

Aqueous humour, 76.

Aquinas, St. Thomas, 17, 263, 265.

Archegosaurus, 135.

Archeopteryx, 73.

Arcturus, 193.

Argyll, Duke of, 14, 276.

Aristotle, 288.

Armadillo, extinct kind, 110.

Arthritis, rheumatic, 183.

Artiodactyle foot, 109.

Asa Gray, Dr., 253, 255, 261.

Asceticism, 193.

Ascidians, placental structure, 81.

a.s.sumptions of Mr. Darwin, 16.

Astronomical objections, 136.

Auditory organ, 74.

Augustin, St., 17, 263, 264.

Aurelius, Marcus, 206.

Avian limb, 106.

Avicularia, 80.

Axolotl, 165.

Aye-Aye, 107.

Aylesbury ducks, 234.

B.

Backbone, 135, 162.

Bacon, Roger, 266.

Baleen, 40.

Bamboo insect, 33.

Bandicoot, 67.

Bartlett, Mr. A. D., 126, 234.

Bartlett, Mr. E., 192.

Basil, St., 17.

Bastian, Dr. H. Charlton, 115, 219, 237, 266.

Bat, wing of, 64.

Bates, Mr., 29, 85, 87.

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Bats, 108.

Beaks, 83.

Beasts, sufferings of, 260.

Beauty of sh.e.l.l-fish, 54.

Bee orchid, 55.

Bird, wings of, 64.

Birds compared with reptiles, 70.

Bird"s-head processes, 80.

Birds of Paradise, 90.

Birth of individual and species, 2.

Bivalves, 79.

Black sheep, 122.

Black-shouldered peac.o.c.k, 100.

Bladebone, 70.

Blood-vessels, 182.

Blyth, Mr., 100, 181.

Bones of skull, 153.

Bonnet, M., 217.

Borwick, Mr., 198.

"Boots" of pigeons, 181.

Breathing, modified power of, 99.

Breeding of lions, 234.

Brill, 37.

Broccoli, variety of, 100.

Bryozoa, 81.

Buchner, Dr., 273.

Budd, Dr. W., 183.

Buffon, 217.

Bull-dog"s instinct, 260.

Burt, Prof. Wilder, 180, 184.

b.u.t.terflies, 29.

b.u.t.terflies, Amazonian, 85.

b.u.t.terflies, American, 29.

b.u.t.terflies of Indian region, 83.

b.u.t.terflies, tails of, 85.

b.u.t.terfly, Leaf, 31.

C.

Cacotus, 149.

Caec.u.m, 83.

Calamaries, 77.

Cambrian deposits, 137.

Cape ant-eater, 174.

Care of aged, 192.

Carinate birds, 70.

Carnivora, 68.

Carnivorous dent.i.tion, 110.

Carp fishes, 146.

Carpal bones, 106, 178.

Carpenter, Dr., 115.

Carpus, 177, 178.

Cases of conscience, 201.

Ca.s.sowary, 70.

Catasetum, 56.

Causes of spread of Darwinism, 10.

Cebus, 226.

Celebes, b.u.t.terflies of, 85.

Centetes, 148.

Centipede, 66, 159.

Cephalopoda, 74.

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