762' INDEX. 



Humor, sense of, in dogs, 80. 



Humphreys, H. N , on the habits of the stickleback, 249, 376* 



Hunger, instinct of, 127. 



Huns, ancient, flattening of the nose by the, 665. 



Hunter, J.,onthenumberof species of man, 199; on secondary sexual 

 characters, 234; on the general behavior of female animals during 

 courtship, 251; on the muscles of the larynx in song-birds, 421; on 

 strength of males, 588; on the curled frontal hair of the bull, 606; on 

 the rejection of an ass by a female zebra, 617. 



Hunter, W. W., on the recent rapid increase of the Santali, 51; on 

 the Santali, 218. 



Huss, Dr. Max, on the mammary glands, 184. 



Hussey, Mr., on a partridge distinguishing persons, 468. 



Hutchinson, Col., example of reasoning in a retriever, 88. 



Hutton, Capt., on the male wild goat falling on his horns, 579. 



Huxley, T. H., on the structural agreement of man with the apes, 

 2; on the agreement of the brain in man with that of lower animals, 

 6; on the adult age of the oraftg, 9; on the embryonic development 

 of man, 10; on the origin of man, 3, 12; on variation in the skulls of 

 the natives of Australia, 29. on the abductor of the fifth metatarsal in 

 apes, 47; on the nature of the reasoning power, 87; on the position 

 of man, 176; on the suborders of primates, 173; on the Lemuridae, 

 179; on the Dinosauria, 180; on the amphibian affinities of the Ich- 

 thyosaurians, 180; on variability of the skull in certain races of man, 

 198; on the races of man, 201; supplement on the brain, 227. 



Hybrid birds, production of, 470. 



Hydrophobia communicable between man and the lower animals, 7. 



HydroporuSy dimorphism of females of, 313. 



Hyelaphus j)orcinnSy 623. 



HygrogonuSy 392. 



Hyla, singing species of, 397. 



Uylohates, absence of the thumb in, 57; upright progression of 

 some species of, 59; maternal affection in a, 79; direction of the hair 

 on the arms of species of, 172; females of. less hairy below than 

 males, 637; hylobates agilis, 57; hair on the arms of, 172; musical 

 voice of, 602, superciliary ridge of, 636; voice of, 647. 



Hylobates hoolock, sexual difference of color in, 613; hylobates lar, 

 57; hair on the arms of, 72; female less hairy, 637; hylobates leucis- 

 cus, 57; song of, 647; hylobates syndactylus, 57; laryngeal sac of, 602. 



Hylophila prasinana, 349. 



Hymenoptera, 330; large size of the cerebral ganglia in, 437; 

 classification of, 168; sexual differences in the wings of, 314; aculeate, 

 relative size of the sexes of, 316. 



Hymenopteron, parasitic, with a sedentary male, 251. 



Hyomoschus aquaticus, 624. 



Hyperythra, proportion of the sexes in, 283. 



Hypogymna dispar, sexual difference of color in, 358. 



Hypopyra, coloration of, 357. 



Ibex, male, falling on his horns, 579; beard of the, 607. 



Ibis, white, change of color of naked skin in, during the breeding 

 season, 442; scarlet, young of the, 548; ibis tantalus, age of mature 

 plumage in, 551; breeding in immature plumage, 552. 



