INDEX. 



351 



Colour-development, local causes of, 

 216 



in animals, summary, 216 

 Colour-perception, supposed recent 



growth of, 244 



Colour-sense, origin of the, 241 

 need for, 243 

 not of recent origin, 246 

 not wholly explicable, 248 

 Colours, classification of organic, 172 

 protective, 172 

 warning, 174 

 sexual, ]77 

 typical, 179 



of animals, how produced, 184 

 theory of protective, 187 

 theory of warning, 189 

 theory of sexual, 192 

 theory of typical, 215 

 Colours and ornaments of humming- 

 birds, 127 

 Colours of fruits, attractive, 224 



protective, 225 



Colours, which first perceived, 243 

 Cometcs sparganurus, very pugnacious, 



214 

 Composite, arborescent in oceanic 



islands, 276 

 Continent, past changes of the great 



Eastern, 321 

 Continents of Tertiary period, probable 



aspect of, 343 

 Copridse, 95 



probable use of horns of, 202 

 Crematogaster, genus of ants, 83 

 Cross-fertilization of flowers, use of, 

 228 



complex arrangements for, 229 

 Cuckoos, 104 



D. 



DA.XAID.E, warning colours of, 174 

 Danainse, Acneinse and Heliconiinre, 



local resemblances of, 256 

 Daphne pontica, 230 

 Darwin, Mr. , on mode of cross-fertiliza- 

 tion and its use, 228 



not too highly rated, 252 



on vegetation of Galapagos, 272 



on use of scented leaves, 277 



on former union of West Indian 



islands and S. America, 306 

 on oceanic islands, 307 

 revolution in thought effected by, 



284 



Deserts on line of tropics, 28 

 Desmoncus, 41 



De Vry, Mr., on the sugar-palm, 43 

 Dews, cause of heavy tropical, 10 



Diagram of mam temperature at Batavia 

 and London, 5 



of rainfall at Batavia and London, 



15 



Dianthus alpinus, D. glacialis, 232 

 Distribution of humming-birds, 138 

 Dragons or flying-lizards, 113 

 Drugs from equatorial forest-trees, 36 

 Duke-of-York - Island, pale-coloured 

 insects of, 259 



Islands, remarkable white plum- 

 aged birds of, 263 



Dyes from equatorial forest-trees, 36 

 Dynastidre, 95 



probable use of horns of, 202 



E. 



EARL, MR. GEORGE WINDSOR, on divi- 

 sion of Malay Archipelago, 307 



Earth-sculpture or surface-geology, 250 



EarUi-works, North American, 292 



Easter Island, sculptures on, 291 



Eciton, genus of foraging ants, 87 



Elateridse, luminous species perhaps 

 mimetic, 205 



Emperor-moth, protective coloration of, 

 174 



Environment, relation of living things 

 to, 254 



Epicalia, sexes of, differently coloured, 

 178 



Epilobium angitstifolium, E. parvi- 

 florum, 233 



Epimachhue, 150 



Equator, cause of uniform high tempera- 

 ture near, 6 



short twilight at, 21 



Equatorial climate, general features of, 

 17 

 uniformity of in all parts of the 



world, 18 

 local diversities of, 19 



Equatorial forests, general features of, 

 29 



Eqxiatorial forest-belt, cause of, 27 



Equatorial heavens, aspect of, 23 



Equatorial zone, temperature of, 3 



Ethiopian Region, 317 



Eugenes fulgens, 134 



Eunica and Siderone, resemblance of 

 species of, 257 



Euplcea, pale species of, in Moluccas 

 and New Guinea, 258 



Euro- Asiatic continent, miocene fauna 

 of, 323 



Eustephanus, 141 



Eustephanus galeritus, 143 



Euterpe olcracea, 43 



Evaporation and condensation, equa- 

 lising effects of, 16 



