INDEX 



463 



Colours of fishes, 55, 75 



warning, 59 



Colouring, variable, 53 

 Combats of spiders. 108 

 Commensalism, 73 

 Communicating nerve-cell, 163 

 Compensating tendency, 355 

 " Composition of the body," 



18 



Conceptual inference, 173 

 Conchin, 259 

 Conchiolin, 259 

 Conductor, 140 

 Cones, 77 

 Conjugation, 193 

 Connective tissue, 197 

 Continuity of generations, 367 



of germ-plasm, 322, 368 

 Convergence, 207, 209 

 Convoluta, 173, 233 

 Co-operation, 74, 77, 93 

 Copepods, 27 

 Copper-head, 285 

 Copris-beetle, 128 

 Coracoid process, 292 

 Coral, 228 



- Islands, 26 



snake, 59, 64 

 Cordylophora, 230 

 Correlation, 355 



of functions, 215 



of organs, 206 



of variations, 426 

 Cortex of brain, 358 

 Courtship of Great CrestedGrebe, 



111 



- of spiders, 106, 107, 108 

 Crabs, 251 



autotomy in, 68 



masking of, 65 

 Cranes, 78 

 Crayfish, 114, 250 

 Cresson, 43 

 Crests of skull, 214 

 Cretinism, 154 

 Crinoids, 243, 245, 397 

 Crocodile-bird, 73 

 Crocodilians, 286 

 Crotophaga ani, 122 

 Crumb of bread sponge, 226 



Crustacea, 248 



Cryptozoic animals, 24, 252 



Ctenophores, 227, 230, 232 



Cuckoo, 122 



Cucumaria crocea, 247 



Cud, 149 



Cunningham, J. T., 272, 397 



Currant moth, 60 



Curve of frequency of error, 426 



- of life, 323 



Cutaneous respiration, 152 

 Cuticle denned, 269 

 Cuttlefish, 55 



- deep-sea, 263 

 Cuvier, 197. 419, 420 

 Cycle of life, 429 

 Cyclical development, 183 

 Cyclopean eye, 404 

 Cyclostomes, 270 



Dallinger, 393 

 Daphnia, 251 

 Darbishire, A. D., 379 

 Darkness, influence of, 395 

 Darwin, 22, 29, 31, 35, 36, 42, 



45, 90, 97, 98, 103, 107, 309, 



420 



Darwin, Erasmus. 338, 416 

 Darwinian theory, 64 

 Darwinism, 422 

 Darwin's frog, 118 



- work, 421 

 Dasypeltis, 215 

 Dasyure, 293 



Dead-men' s-fingers, 228, 232 

 Death, 333 



- causes of, 334 

 Death's-head moth, 126 

 Deep sea, 392 



- animals, 6 



- cuttlefish, 263 

 Degeneration, 212 

 Deinosaurs, 281 

 Delage, 311 

 Democritus, 367, 412 

 Dendrites, 140 

 Dendrosoma, 75 

 Dependence on surroundings, 18 

 Dero, 50 



Descartes, 158 



