HUNS. 
INDEX. 
IMITATION. 
497 
Huns, ancient, flattening of the nose 
by the, ii. 352. 
Hunter, J., on the number of species 
of man, i. 226 ; on secondary sexual 
characters, i. 253 ; on the general 
behaviour of female animals during 
courtship, i. 273; ou the muscles 
of the larynx in song-birds, ii. 55 ; 
on the curled frontal hair of the 
Bull, ii. 282 ; on the rejection of 
an ass by a female zebra, ii. 295. 
Hunter, \V. \V., on the recent rapid 
increase of the Sari tali, i. 133 ; ou 
the Santali, i. 24-1. 
Hussey, Mr., on a partridge distin- 
guishing persons, ii. 110. 
Hutchinson, Col., example of reason- 
ing in a retriever, i. 48. 
Hutton, Capt., on the male wild goat 
falling on his horns, ii. 249. 
Huxley, T. H., on the structural 
agreement of man with the apes, 
i. 3; on the agreement of the brain 
in man with that of lower animals, 
i. 10 ; on the adult age of the 
Orang, i. 18 ; on the embryonic 
development of man, i. 14 ; on the 
origin of man, i. 4, 17 ; on variation 
in the skulls of the natives of Aus- 
tralia, i. 108 ; on the abductor of 
the fifth metatarsal in apes, i. 128 ; 
on the position of man, i. 191 ; on 
the sub-orders of primates, i. 195 ; 
on the LemurkUc, i. 202; on the 
Dinosauria, i. 204; on the amphibian 
affinities of the Ichthyosaurians, i. 
204; on variability of the skull in 
certain races of man, i. 220 ; ou the 
races of mao, i. 229. 
Hybrid birds, production of, ii. 113. 
Hydrophobia communicable between 
man and the lower animals, i. 11. 
Ilydj'oporus, dimorphism of females 
of, i. 343. 
Hyelapkus purdnus, ii. 303. 
Hygrogonu v, ii. 21. 
Hyla, singing species of, ii. 27. 
Hylobates, maternal affection in a, i. 
40; absence of the thumb in, i, 
140; upright progression of some 
species of, i. 143 ; direction of the 
hair on the arms of species of, i. 
192 ; females of, less hairy below 
than males, ii. 320. 
Hylobates agilis , i. 140 ; hair on the 
arms of, i. 193 ; musical voice of 
the, ii. 277 ; superciliary ridge of, 
ii. 318; voice of, ii. 332. 
Hylobates hoolock , sexual difference of 
colour in, ii. 291. 
Hylobates la/', i. 140 ; hair on the 
arms of, i. 193. 
Hylobates huciscas, i. 140. 
Hylobates syndactylus , i. 140 ; laryn- 
geal sac of, ii. 276. 
Hymenoptera, i. 364 ; large size of 
the cerebral ganglia in, i. 145 ; 
classification of, i. 188; sexual dif- 
ferences in the wings of, i. 345 ; 
aculeate, relative size of the sexes 
of, i. 347. 
Hymenopterqn, parasitic, with a 
sedentary male, i. 272. 
Hyo/nosc/ms aqiiaticus, ii. 304. 
Hyper yt/ira, proportion of the sexes 
in, i. 310. 
Ilypogt/mnci dispar , sexual difference 
of colour in, i. 398. 
IJypopyra , coloration of, i, 397. 
I. 
Ibex, male, falling ou his horns, ii. 
249 ; beard of the, ii. 283. 
Ibis, scarlet, young of the, ii. 208; 
white, change of colour of naked 
skin in, during the breeding season, 
ii. 80. 
Ibis tantalus , age of mature plumage 
in, ii. 213 ; breeding in immature 
plumage, ii. 214, 215. 
Ibises, decomposed feathers in, ii. 74; 
white, ii. 228, and black, ii. 230. 
Ichneumonida^, difference of the 
sexes in, i. 365. 
Johtiiyo pterygia, i. 125. 
Ichthyosaurians, i. 204. 
Ideas, general, i. 62. 
Idiots, microcephalous, imitative 
faculties of, i. 57 ; microcephalous, 
their characters and habits, i. 121. 
Iguana tubenmlata, ii. 32. 
Iguanas, ii. 82. 
Illegitimate and legitimate children, 
proportion of the sexes in, i. 302. 
Imagination, existence of, in animals, 
i. 45. 
Imitation, i. 39 ; of man by monkeys, 
