26o INDEX 



Control, power of, 239, 243 



Convolution of brain, 325 



Coots, 104 



Cormorants, loa, 103, 153, 162 



Countershading, 75-78, 88, 97 



Coursers, 154 



Cowbirds, 148, 157, 190 



Coypu, 178 



Crabs, 30, 121 



Cranes, loi, 154 



Crayfish, 15 



Cream, 186 



Crocodiles, 15, 144, 145, 184, 166 



Crows, 150 



Crustaceans, 27, 30, 34, 118, 130 



Cubs, 10, 168, 190 



Cuckoo, 102, III, 149, 153, 154, 157 



Cud, 188 



Curassow, 153 



Curd, 188 



Curel, F. de, 231 



Curiosity, 250, 253 



Curlew, 102 



Cygnet, 240 



Darwin, 36, 70, 72, 113, 115 



Dassie, 44, 173 



Dasyure, g6 



Death and young animals, 116 



Death-rate of sparrows and human 



beings, 116 

 Deer, 75, 77 



antler-growth in, 12 



coloration, gi 



duration of youth, 46 



milk for, 190 



rump patches, 71 



sexual colours, 6g 



skin glands, 184 



spotted, 78 



tameness of young, 219 



young, 171 

 Demersal eggs, 135 

 Deniker, J., 9 

 " Descent of Man," 70 

 Desert animals, 77 



Development, embryological, of indi- 

 viduals, 223 

 Devil, Tasmanian, 180, 220 



Diatoms, 232 

 Digestion, 183, 198 

 Dik-dik antelope, 89 

 Dipleurula larva, 23 

 Display of cock pheasants, 71 

 Divers, 102, 154 

 Dog-fish, 138 

 Dogs, coloration, 86 



duration of youth, 42 



habits of young, 247 



qualities of, 205 



skin glands, 184 

 Dolphins, 240 



Domestic animals, 48, 75, 204 

 Domestication, 204, 205, 221 

 Doves, III 



Down feathers, 97, 98, 101-105, 159 

 Dragonflies, 56, 70, 125 

 Drakes, 69, 109 

 Dromedary, 11, 93 

 Duck-billed mole, 163 

 Ducklings, 102, 161, 240 

 Ducks, coloration of young, 104, 106 



colour of eggs, 153 



fledging of, 108 



longevity of, 49 



plumages of, 98, 100, 103, 109 



South American, 113 

 Duckweed, i5i 

 Dugong, 240 

 Duikers, 46, 88, 89 

 Duration of youth, 37, 49, 54, 112 



Eagles, 49, 102, 103, 105 



Earthworm, 120 



Earwig, 34, 124 



Eat, learning to, 242 



Echidna, 2 



Echinoderms, 22, 23 



Eclectus, 64, loi. III 



" Eclipse '' plumage, 99, 100, no, 112 



Edentates, 220 



Education, 37, 48, 169, 239, 255 



Eels, 53, 54, 333 



Egg-cell, 222 



Eggs, of birds, colours, 153, 154 

 incubation, loi 

 laying of, 148, 149 

 shapes of, 152 



