INDEa, 



493 



Heron eating seed, 383. 

 Heron, Sir R., on peacocks, 77. 

 Heusinger, on white animals poi- 

 soned by certain plants, 10. 

 Hewitt, Mr., on sterility of first 



crosses, 275. 

 Hildebrand, Prof., on the self- 

 sterility of Corydalis, 264. 

 Hilgendorf, on intermediate varie- 

 ties, 305. 

 Himalaya, glaciers of 371. 



plants of, 373. 

 Hippeastrum, 264. 

 Hippocampus, 210. 

 Hofmeister, Prof., on the move- 

 ments of plants, 219. 

 Holly-trees, sexes of, 82. 

 Hooker, Dr., on trees of New 

 Zealand, 87. 

 on acclimatization of Himalayan 

 trees, 126. 

 Hooker, Dr., on flowers of um- 

 belliferae, 130. 

 on the position of ovules, 191, 



192. 

 on glaciers of Himalaya, 371. 

 on algae of New Zealand, 374. 

 on vegetation at the base of the 



Himalaya, 375. 

 on plants of Tierra del Fuego, 



373. 

 on Australian plants, 374, 393. 

 on relations of flora of America, 



373. 

 on flora of the Antarctic lands, 



378, 393. 

 on the plants of the Galapagos, 



387, 392. 

 on glaciers of the Lebanon, 



371. 

 on man not causing variability, 



69. 

 on plants of mountains of Fer- 

 nando Po, 373. 

 Hooks on palms, 177. 



on seeds on islands, 387. 

 Hopkins, Mr., on denudation, 303. 

 Hornbill, remarkable instinct of, 



259. 

 Horns, rudimentary, 443. 

 Horse, fossil, in La Plata, 326. 



proportions of, when young, 432. 

 Horses destroyed by flies in Para- 

 guay, 63. 

 Striped, 143* 



Horticulturists, selection applied 



by, 26. 

 Huber, on cells of bees, 248. 

 Huber, P., on reason blended with 

 instinct, 227. 

 on habitual nature of instincts 



228. 

 on slave-making ants, 239. 

 on Melipona domestica, 244. 

 Hudson, Mr., on the ground 

 woodpecker of La Plata, 158. 

 on the Molothrus, 238. 

 Humble-bees, cells of, 244. 

 Hunter, J., on secondary sexual 



characters, 134. 

 Hutton, Captain, on crossed geese> 



266. 

 Huxley, Prof., on structure of 

 hermaphrodites, 88. 

 on the affinities of the Sirenia, 



335. 

 on forms connecting birds and 



reptiles, 335. 

 on homologous organs, 427. 

 on the development of aphis, 

 431, 432. 

 Hybrids and mongrels compared, 



287. 

 Hybridism, 260. 

 Hydra, structure of, 164. 

 Hymenoptera, fighting, 77. 

 Hymenopterous insect, diving, 159. 

 Hyoseris, 193. 



Ibla, 132. 



Icebergs transporting seeds, 364. 

 Increase, rate of, 56. 

 Individuals, numbers favorable to 

 selection, 88. 

 many, whether simultaneouslj 

 created, 357. 

 Inheritance, laws of, 11. 



at corresponding ages, 12. 

 Insects, color of, fitted for thei' 

 stations, 73. 

 sea-side, colors of, 120. 

 blind, in caves, 125. 

 luminous, 169. 

 their resemblance to certain ob 



jects, 201, 202. 

 neuter, 255. 

 Instinct, 227. 

 not varying simultaneously witi? 

 structure, 253. 

 Instincts, domestic, 232. 



