336 



THE PLAY OF ANIMALS. 



Duncker, nursing play of dogs, 170. 

 Duvaucel, climbing of apes, 118. 

 Dyer, on inheritance of acquired 

 characters, 56. 



Eagle, 260. 



Edmonson, execution by crows, 209. 



Eimer, on instinct, 48 ; Weisraann, 



51 ; curiosity of cows, 217 ; of 



lizards, 219. 

 Elephant, 298. 

 Ellendorf, on apes, 185. 

 Encyclopaedia Britannica, 27. 

 Espinas, courtship, 244. 

 Execution by animals, 209. 

 Experimentation, 76, 85, 180, 211, 



290, 328. 



Falcon, 261. 



Falkenstein, on the gorilla, 87, 97, 



114, 180. 

 Fawn, 128. 



Fere, divided consciousness, 309. 

 Fighting plays, 135. 

 Finch, 280. 

 Firefly, 100. 



Fischer, on the mandril, 247. 

 Fish, 100, 102, 219, 265. 

 Fish otter, 87. 



Fitch, on nursing plays of cats, 173. 

 Flight of birds, 105, 259, 266. 

 Fltigel, on Wasmann, 29, 56. 

 Flying fish, 101. 

 Forel, on ants, 56, 58, 139. 

 Foveau de Courmelles, on instinct, 



47. 

 Fox, 112, 123, 128. 

 Franck, 199. 

 Furnarius, duet, 256. 



Galton, on inheritance of acquired 



characters, 55 ; on selection, 64. 

 Gardener, 220. 

 Gazelle, 113, 208, 217. 

 Gellert, 27. 

 Genius, 295, 317. 



Gesner, play of cats, 132; of man- 

 dril, 246 ; vanity of the peacock, 

 267. 



Gibbon, 118, 274. 



Girtanner, on the vulture, 96. 



Gnu, 138. 



Goat, 108, 128, 144, 208, 215. 



Goose, 106, 211, 226. 



Golden pheasant, 269. 



Golden plover, 26. 



Golden-crested wren, 129, 270. 



Golz, on mocking birds, 197. 



Gorilla, 87, 97, 119, 186. 



Gould, on the bower bird, 161. 



Grischow, on martens. 128. 



Gross, 303, 305, 311, 314. 



Grosse, play and art, 292, 295. 



Gunzel, the magpie, 129, 226. 



Guts Muths, play as recreation, 15, 

 16, 23. 



Haas, on antelopes, 128, 



Haast, on the keanestor, 220. 



Habit. 46. 



Habitual 1, 118. 



Haeckel, 51. 



Hammerhead, 159. 



Hare, 96, 113. 



Hartmann, on instinct, 8, 30, 40, 66, 

 70, 74 ; unconscious sexual selec- 

 tion, 240; apparent I, 304; di- 

 vided consciousness, 311, 314, 319. 



Hensel, concert of howling apes, 272. 



Hertwig, on Weismann, 51. 



His, on the inheritance of acquired 

 characters, 56. 



Hoffmann, imitation by a dog, 191. 



Hooded raven, 147. 



Horse, 113, 125, 138. 



Howling ape, 97, 211, 272, 276. 



Huber, on ants, 58, 130, 140. 



Hudson, on play, 10, 11, 238 ; 

 on sheep, 33 ; the parra jacana, 

 43: the chauna chavarria, 108, 

 211,219; the firefly, 160; dance 

 of spur- winged lapwing, 109; 



