Index. 
Hartmann, on flattening of early 
human tibiz, 96. 
Harvey, on Lord Bacon’s writings, 
2 
Heart, development of, 154. 
Heilprin, on skulls of deer, 198, 
199; on fossil shells, 201, 202, 
Hen, ovum of, 122. 
Heredity, in relation to classifica- 
tion, 28-31; in relation to em- 
bryology, 48-102; chromatin- 
fibres in relation to, 134; in 
relation to theories of organic 
evolution, 253-255, 250-264, 
377: 
Heimit-crabs, 62-65, 288, 289. 
fleteromera, 233 
Hilgendorf, on shells of Planorbis, 
201, 
fipparion, 191, 192. 
H.ppopotamus, foot of, 187. 
Hog, see Pig. 
Homology, 38, 50-65, 176, 177, 
347-359, 357-359- 
Homopterous insect, imitating 
leaf-cutting ants, 331, 332. 
Hooker, Sir Joseph, on flora of 
St. Helena, 234. 
Horns, 98-100, 167-169. 
Horse, eye of, 75; limb-bones of, 
176, 177, 186, 188-192; teeth 
of, 189-191; portraits of do- 
mesticated breeds of, 309. 
Human, see Man. 
Hfumerus, perforations of, in quad- 
Tumana and man, 94, 95. 
Humming-birds, restricted to the 
New World, 211. 
Hunter, 3; on ear of whale, 65. 
Huxley, Prof., on mechanical se- 
lection, 283; on age of theearth, 
435,436; on Dr. Whewell, 243. 
Hyatt, on shells of Planorbis, 201. 
flydra, V11, 122. 
Hyrax, foot of, 185, 186, 
I. 
Ignorance, argument from, 41, 42, 
49- 
Illative Sense, 6. 
Imitative colours, 317-323, 326- 
332. 
455 
Infant, feet of, 78, 79; grasping 
power of, 81, 
Infertility, inter-specilic, in relation 
to natural selection, 374-376. 
Insects, wingless, 68-70; in pri- 
mary formations, 163, Appendix ; 
on oceanic islands, 224-238; in 
relation to galls, 293-295, 446- 
448; defensive colouring of, 321- 
332; fertilizing flowers, 400. 
Instincts, always of primary use to 
species presenting them, 286-23. 
Intercrossing, in relation to natural 
selection, 374-370. 
Inutility of specific characters, in 
relation to natural selection, 
374-376. 
Islands, oceanic, 224-237; British, 
238-241. 
j. 
Japan, hairless dog of, IoT. 
Jelly-fish, 119, 120. 
K. 
Kallima, 323. 
Karyokinesis, 112-114, 128-134. 
Kepler, 272. 
Kerguelen Island, flightless in- 
sects of, 70. 
Kropotkin, Prince, on co-operative 
instincts, 269. 
L. 
Lagopus mutus, 317, 318. 
Lamarck, his method in natural 
history, 4; his theory of evolu- 
tion, 253-256. 
Lamprey, 148. 
Languages, classification of, re- 
sembles that of organic forms, 
22's 
Lankester, E. Ray, on karyo- 
kinesis, 129, 130. 
Leaf insect, 322. 
Le Conte, on geological succession 
of animal classes, 164, 165; on 
types of tails, 169-173 ; on fossil 
shells of Planorbis, 201; his 
work on the relation of the 
theory of evolution to religious 
thought, 412. 
