464 



INDEX 



Descent of Man, 359 



Desiccation, 46, 238, 242 



Determinants, 370 



Determinism, 176 



Detritus as food, 27 



De Varigny, 383 



Development, 181, 313, 322, 339 



- and life-histories, 298-337 



- of chick, 298, 346 



- of eye, 266 



- of frog, 280 

 DeVries, 315, 427 

 Diderot, 36 



Differentiation, 205, 315, 353 

 Digestion, 147 

 Digger-wasps, 114 

 Dihybridism, 376 

 Dinornis, 291 



Diplopoda, 252 



Diplozoon, 235 



Dipnoi, 210, 274 



Diporpa, 235 



Directive factors in evolution, 



431 



Discontinuous variations, 426 

 Discophora, 241 

 Disease rare in wild animals, 1 50 

 Disharmonies, 215 

 Display of Argus pheasant, 109 



- of grebe, 109, 111 



- of male spiders, 107, 108 

 Distomum hepaticum, 155, 234, 



235 

 Distribution by birds, 31 



- of Onychophora, 252 

 Dittmars, 218 



Division of labour, 74, 94, 1 94 



Dobell, 93 



Dog, behaviour of, 177 



Dohrn, 210 



Domatia, 30, 397 



Domestic life of animals, 100-124 



Dominant, 372 



Dormice, 130 



Double-breathing fishes, 274 



Draco volans, 282 



Dragonet, 27<> 



Driesch, 187 



Driver-ants, 88 



Dromia, 67 



Drones, 80 

 Drosophila, 403 

 Drought, effect of, 44 

 Drummond, 24, 90 

 Drzewina, 172 

 Duck, skeleton of, 217 

 Duckmole, 291 

 Ductless glands, 153 

 Dynamics of organism, 184 



Eagle-owl, 129 



Ear-cockles, 238 



Earland, 174 



Ear-ossicles, 211 



Earthworms, 22, 50, 130, 238 



Earwigs, 115 



Echidna, 291 



Echinoderma, 243 



Echinoderms, autotomy in, 69 



Echinoids, 243 



Echinorhynchus, 238 



Ectoderm, 232, 314 



Edible bird's-nest, 287 



Edwards, 394 



Eel, 274, 326 



Effector, 140 



Egg of cuttlefish, 263 



- of frog, 279, 280 



- of hag, 272 



- of hen, 366 

 Egg-cell, 306 

 Egg-eating snake, 215 

 Eggs of herring, 405 



- of Kurtus, 117 

 Ehreriberg, 219, 223 

 Elaps, 59, 164, 285 

 Elasmobranchs, 272 

 Electric organs, 146, 210 

 Elephant hawk-moth, 64 

 Elephants, 294 

 Elimination, 429 

 Embryonic life, 327 

 Emerson, 398 



Emery, 88, 105 

 Empedocles, 412 

 Emu, 289 



Endoderm, 232, 314 

 Entelechy, 187 

 Enter opneusts, 267 

 Entoconcha mirabila, 261 



