23° 



INDEX 



Beaver, fossils of, 56 

 Bee-hawk moth, mimicry in, 138 

 Bees, fertilisation of clover by, 

 42, 147 

 of orchids by, 147 

 Belt's frog, 135 



Bird of Paradise, epigamic color- 

 ation of, 141 

 Birds, epigamic coloration in, 

 141 

 fossils of, 61, 65 

 variation in, 44 

 Birds and reptiles, relation be- 

 tween, 180 

 Bison, fossils of, 56 

 Blastula stage in Amphioxus, 112 

 Brachyura, affinities of, 89 

 Bramble, varieties of, 45 

 Buffon, s 



BufF-tip moth, protective resem- 

 blance in, 129 

 caterpillar of, 136 

 Burnet moth, caterpillar of, 136 

 Butterflies, epigamic coloration 

 in, 141 

 mimicry in, 137 

 protective colouring in, 127 

 variation in, 44 

 warning colours of, 134 



Cabbage, varieties of, 46 



Caddis worm, 132 



Catamites, 57 



Camelus, geographical distribu- 

 tion of, 71 



Canaries, change of colour in, 121 



Carrier-pigeon, 28 



Catastrophism, doctrine of, 10 



Cave animals, change of colour 

 in, 120 

 degeneration in, 161 



Cave bear, fossils of, 56 



Cephalopoda, development of eye 

 in, 107, no 



Ceratodus, 167, 177 



Cervus dicrocerus, 94 



C. elaphus, 93 

 Chameleon, 124, 130 

 Chick embryo, 186 

 Chiton, 171 

 Chlorophyll, 119 

 Chromatophores, 130 

 Cinnabar moth, caterpillar of, 135 

 Clearwing moths, mimicry in, 139 

 "Climbing Plants," 218 

 Clover, fertilisation of by bees, 



42, H7 

 Cochin fowl, 34 



Cockroach, development of, 105 

 Ccelenterata, fossils of, 60 

 Colours of animals and plants, 1 16 

 Colours, non-significant, 118 



significant, 122 

 Columba livia, 29 

 Comparison of embryology and 



palaeontology, 91 

 Conger-eel, number of eggs laid 



by. 39 

 Copepoda, degeneration in, 161 

 Corals, fossils of, 60 

 Coral reefs, theory of, 208 

 Corvus, different species of, 4 

 Crabs, affinities and development 



of, 88, 90 

 adventitious colouring in, 132 

 Craniota, 174 

 Cross-fertilisation, 144 

 "Cross- and self-fertilisation in 



Plants," 217 

 Crossing of pigeons by Darwin. 



3° 

 Crustacea, fossils of, 60 

 Crust of the earth, constitution 



of, 56 

 Cuckoo, mimicry in, 140 

 Cuvier, 7 



Dactylopterus, 169 

 Danaida, warning colours in, 

 134, 137 



