410 



INDEX. 



Humphreys, H. N., on the habits of the 

 Stickle-back, i. 262, ii. 2. 



Hunger, instinct of, i. 86. 



Huns, ancient, flattening of the nose by 

 the, ii. 325. 



Hunter, J., on the number of species of 

 man, i. 218 ; on secondary sexual charac- 

 ters, i. 245 ; on the general behavior of 

 female animals during courtship, i. 264; 

 on the muscles of the larynx in song- 

 birds, ii. 52 ; on the curled irontal hair of 

 the Bull, ii. 269 ; on the rejection of an 

 ass by a female zebra, ii. 2S1. 



Hunter, "W. W., on the recent rapid in- 

 crease of the Santali, i. 128 ; on the San- 

 tali, i. 232. 



Hussey, Mr., on a partridge distinguishing 

 persons, ii. 105. 



Hutchinson, Colonel, example of reason- 

 ing in a retriever, i. 46. 



Hutton, Captain, on the male wild-goat 

 falling on his horns, ii. 238. 



Huxley, T. H., on the structural agree- 

 ment 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. 13 ; on the embryonic de- 

 velopment of man, i. 14 ; on the origin 

 of man, i. 4, 17; on variation in the skulls 

 of the natives of Australia, i. 104; on the 

 abductor of the fifth metatarsal in apes, 

 i. 123 ; on the position of man, i. 1S3 ; on 

 the sub-orders of primates, i. 187; on the 

 Lemuridse, i. 194; on the Dinosauaria, i. 

 196 ; on the amphibian affinities of the 

 Ichthyosaui'ians, i. 196 ; on variability of 

 the skull in certain races of man, i. 218 ; 

 on the races of man, i. 219. 



Hybrid birds, production of, ii. 109. 



Hydrophobia communicable between man 

 and the lower animals, i. 11. 



Hydroporus, dimorphism of females of, 

 i. 333. 



HyelapTius porcinus, ii. 2S9. 



Hygrogonus, ii. 20. 



Hy'la, singing species of, ii. 25. 



Hylobates, maternal affection in a, i. 39 ; 

 absence of the thumb in, i. 135 ; upright 

 progression of some species of, i. 137; 

 direction of the hair on the arms of spe- 

 cies of, i. 185 ; females of, less hairy be- 

 low than males, ii. 305. 



Hylobates agilis, i. 135; hair on the arms 

 of, i. 1S5; musical voice of the, ii. 264; 

 superciliary ridge of. ii. 303 ; voice of, ii. 

 316. 



Hylobates hoolock, sexual difference of 

 color in, ii. 277. 



Hylobates lar, i. 135 ; hair on the arms of, 

 i. 185. 



Hylobates leuciscm, i. 135. 



Hylobates syndactylus, i. 135; laryngeal 

 sac of, ii. 263. 



Hymenoptera, i. 353 ; large size of the cer- 

 ebral ganglia in, i. 139 ; classification of, 

 i. 181 ; sexual differences in the wings of, 

 i. 335 ; aculeate, relative size of the sexes 

 of, i. 337. 



Hymenopteron, parasitic, with a seden- 

 tary male, i. 264. 



Hyomoschus aquaticm, ii. 2S9. 



Hi/perythra, proportion of the sexes in, i. 

 301. 



Hypogymna dispar, sexual difference Ox 

 color in, i. 3S6. 



Hypopyra, coloration of, i. 384. 



Ibex, male, falling on his horns, ii. 238; 

 beard of the, ii. 269. 



Ibis, scarlet, young of the, ii. 199 ; white, 

 change of color of naked skin in, during 

 the breeding-season, ii. 76. 



Ibis tantalus, age of mature plumage in, ii. 

 204 ; breeding in immature plumage, ii. 

 205, 206. 



Ibises, decomposed fe^hers in, ii. 71; 

 white, ii. 218, and black, ii. 220. 



Ichneumonld^e, difference of the sexes in, 

 i. 354. 



Ichthyopterygia, 120. 



Ichthyosaurians. ii. 196. 



Ideas, general, i. 60. 



Idiots, microcephalous, imitative faculties 

 of, i. 55 ; microcephalous, their characters 

 and habits, i. 116. 



Iguana tuberculata, ii. 31. 



Iguanas, ii. 30. 



Illegitimate and legitimate children, pro- 

 portion of the sexes in, i. 292. 

 ' Imagination, existence of, in animals, i. 44. 



Imitation, i. 38 ; of man by monkeys, i. 

 42; tendency to, in monkeys, microce- 

 phalous idiots and savages, i. 55; in 

 fluence of, i. 155. 



Immature plumage of birds, ii. 175, 179. 



Implacentata, i. 194. 



Implements, employed by monkeys, i. 49 ; 

 fashioning of, peculiar to man, i. 51. 



Impregnation, period of, influence of, up- 

 on sex, i. 293. 



Improvement, progressive, man alone sup- 

 posed to be capable of, i. 48. 



Incisor teeth, knocked out or filed by 

 some savages, ii. 324. 



Increase, rate of, i. 126; necessity of 

 checks in, i. 130. 



Indecency, hatred of, a modern virtue, i. 

 92. 



India, difficulty of distinguishing the na- 

 tive races of, i. 207 ; Cyprinidse of, ii. 1 7 ; 

 color of the beard in races of men of, ii. 

 304. 



Indian, North American, honored for scalp- 

 ing a man of another tribe, i. 90. 



Individuality, i. 60. 



Individuation, i. 310. 



Jndopicus carlotta, colors of the sexes of, 

 ii. 167. 



Infanticide, prevalence of, i. 90, 129 ; sup- 

 posed cause of, ii. 328; prevalence and 

 causes of, ii. 347, et seq. 



Inferiority, supposed physical, of man, i 

 150. 



