454 
Encyclopedia Biitiannica, eighth 
ed., on instinct, 289-291. 
Encystation of Protozoa, 115. 
Endoderm, 137-142. 
i quatorial plate, 129. 
f.guus, sce Horse. 
Lrythrolamprus 
330. 
Evolution, organic, fact of, S.ction 
I; Method of, Section I]; ideas 
upon, prior to Darwin, 253-258; 
divergent, 266, 267. 
Ewart, Professor Cossar, on electric 
organ of skate, 364, 367. 
Existence, see Struggle for. 
Eye, of octopus, £7, 58, 347-3503 
absence of, in dark-cave animals, 
70-72; nictitating membrane of, 
74, 753 development of, from 
cutaneous nerve-ending, 352- 
354- 
venustisstmuUs, 
F, 
Feet, 51-59, 66, 77-80, 174-192, 
107. 
Fertilization of ova, 127, 128; of 
flowers by insects, 406. 
Fish, embiyology of, 143-155; 
paleontology of, 163, 165, 169- 
171; brain of, 194-197; distribu- 
tion of, 224-246; flying, 355. 
Fission, reproduction by, 106, 107. 
Flat-fish, 317. 
Float, see Swim-bladder. 
Flowers, fertilization of, by insects, 
400. 
Fly, imitating a wasp, 329. 
Flying-fish, and squirrels, 355. 
foraminifera, 349. 
Forbes, H. O., on scapulo-coracoid 
bones of Dinornts, 60. 
Fortuitous, Darwin’s use of the 
word, 340 
Fossils, see Palaeontology. 
Frogs, 317. 
G. 
Galapagos Islands, 227-231, 236, 
227, 
Galeus, eye of, 75. 
Galls, vegetable, 293-295, 
448. 
446- 
Index. 
Gastreea, 137-140. 
Gastrophysema, 138. 
Gastrulation, 137, 149. 
Gegenbaur, 147, 181. 
Gemmation, reproduction by, 106, 
Jo7, ITO, 111. 
Generalization, Be 
Generalized types, 33. 
Genesis, classification of organic 
nature in, 23. 
Genial tubercle, 96. 
Geographical distribution, 204- 
248; see Glacial period, Barriers, 
Transport of organisms, Oceanic. 
islands, &c. 
Geology, record of imperfect, 156- 
160, and Appendix ; see Pale- 
ontology. 
Germs, prophetic, 272, 351-362. 
Gesner, on classification, 24; on 
canaries, 313. 
Gill-arches, 146, 147, 150, IAT. 
Gill-slits, 146, 147, 150-153. 
Gillis, of young salamanders, 102 ; 
origin of, in embryo, 144; of 
fish, 150, 152. 
Giraffe, neck of, in relation to 
Lamarck’s theory, 254. 
Glacial periods, effects of, on dis- 
tribution of plants and animals, 
209, 210, and Appendix 
Goose, Frizzled, portrait of, 304. 
Gorilla, see Apes. 
Gray, Professor Asa, 337 
Great-toe, in man and apes. 79 81. 
Grouse, 317-319. 
Growth, correlation of, 357, 362. 
Gymnotus, 305, 307. 
H. 
Hiackel, on analogy between 
species and languages, 32; on 
reproduction as discontinuous 
growth, 105, 106; his ideal 
primitive vertebrate, 143, 144. 
Hair, vestigial characters of, in 
man, 89-92. 
Hales, 3. 
Haller, 3. 
Hamilton, Sir William, 272. 
Hands, 51-55, 66, 80- 82, 174-192. 
Hare, 318, 319. 
