Ancon sheep, 148

Angrosperms, 56

Arm of man, 90, 109

Arthropoda, 50, 268

Articulata, 40, 42, 45, 51, 55
Ascidians (see Sea-squirts)

Ascula, 174

Auricularia, 200

Australian fauna, 27

Axolotl, 236 et seq., 242 et seq., 248

B

Balani (see Sea-acorns)
Balanoglossus, 55, 201
Balfour, F. M., 236, 237
Barnacle, 32

Barnacle, development of, 203, 352
Barramunda (see Ceratodus)
"Beagle," voyage of, I

Bear animalcule, 185, 271
Beetles, 85

Beryx, 346

Biology, study of, 9, 14
Bipinnaria, 196

Birds and reptiles, affinity of, 154

Birds, development of, 179
Birds fertilizing flowers, 335
Birds, fossil, 157

Blank periods in geology, 369
Blastoderm, 169, 177

Blood corpuscles, 73, 295
Bone, structure of, 71
Bonnet, 170, 183
Botany, 14
Botryllus, 288
Brachiopoda, 230

Bracts, 131, 132

Branchial clefts (see Gill clefts)
Brine shrimp, 209

Browning, 150
Brown-Séquard, 85

Bubble-shells, 228

Ceratodus, 30, 113, 114, 116, 165, 237
Chara, 68

Chauvin, Fräulein von, 242 et seq.
Chermes, 289

Cherry, 133, 304

Chironomus, 246

Chiton, 222, 225, 233
Chlamydomonas, 278

Chloeon, 257, 267, 270
Chlorophyll, 359
Chondrocanthus, 208
Christol De, 93
Chrysalis, 252, 257
Cicatricula, 169, 179
Cilia, 69, 196, 223
Cimora, 114
Cirrahatula, 286

Classification, 19, 20, 27, 124
Cleistogamous flowers, 320
Climbing perch, 119

Clio, 222

Dactylethra, 237
Dana, 362
Dandelion, 302
Daphnia, 207

D

Darwin, Mr., 1, 2, 5, 12, 15, 28, 32,
79, 81, 85, 86, 99, 101, 111, 119,
129, 142, 144, 146, 147, 148, 150,
151, 172, 187, 189, 191, 247, 260,
320, 321, 322, 323, 330, 337, 338,
339, 340, 343, 347, 348, 349, 352,
366, 369, 370, 371
Darwinism, 6, 7

Dead-nettle, 334

Decapoda, 210

Degeneration, 11, 342 et seq.
Degeneration in man, 363

Demodex, 355

Dentalium, 225, 233

'Descent of Man,' 150

Development, bearing of on evolution,

172, 343

Development of animals, 5, 10, 19, 32,
167, 191, 220