INDEX. 



491 



Syv, structure of, 162. 



Eye, correction for aberration, 182. 



Eyes, reduced, in moles, 123. 



Fabre, M., on hymenoptera fight- 

 ing, 77. 

 on parasitic sphex, 239. 

 on Sitaris, 436. 

 Falconer, Dr., on naturalization of 

 plants in India, 58. 

 on elephants and mastodons, 339. 

 and Cautley, on mammals of 

 sub-Himalayan beds, 345. 

 Falkland Islands, wolf of, 388. 

 Faults, 299. 

 Faunas, marine, 352. 

 Fear, instinctive, in birds, 231. 

 Feet of birds, young mollusks ad- 

 hering to, 382. 

 Fertilization variously effected, 



173 180 

 Fertility of hybrids, 268. 

 from slight changes in condi- 

 tions, 278. 

 of crossed varieties, 283. 

 Fir-trees destroyed by cattle, 63. 



pollen of, 183. 

 Fish, flying, 157. 

 teleostean, sudden appearance 



of, 316. 

 eating seeds, 362, 383. 

 fresh-water, distribution of, 382. 

 Fishes, ganoid, now confined to 

 fresh water, 92. 

 electric organs of, 167. 

 ganoid, living in fresh water, 329. 

 of southern hemisphere, 376. 

 Flat-fish, their structure, 206. 

 Flight, powers of, how acquired, 



157. 

 Flint-tools, proving antiquity of 



man, 15. 

 Flower, Prof., on the Larnyx, 212. 

 on Halitherium, 335. 

 on the resemblance between the 

 jaws of the dog and Thyla- 

 cinus, 414. 

 on the homology of the feet of 

 certain marsupials, 423. 

 Flowers, structure of, in relation to 

 crossing, 81. 

 of composite and umbelliferse, 



130, 193. 

 beauty of, 180. 

 Rouble, 255, 



Flysch formation, destitute of or- 

 ganic remains, 300. 

 Forbes, Mr. D., on glacial action 



in the Andes, 371. 

 Forbes, E., on colors of shells, 120. 

 on abrupt range of shells in 



depth, 151. 

 on poorness of palaeontological 



collections, 299, 300. 

 on continuous succession of 



genera, 325. 

 on continental extensions, 358, 



359. 

 on distribution during Glacial 



period, 366. 

 on parallelism in time and space, 

 400. 

 Forests, changes in, in America, 



65. 

 Formation, Devonian, 339. 

 Cambrian, 317. 

 intermittent, 307. 

 Formations, thickness of, in 



Britain, 297. 

 Formica rufescens, 239. 

 sanguinea, 240. 

 flava, neuter of, 256. 

 Forms, lowly organized, long en- 

 during, 104. 

 Frena, ovigerous, of cirripedes, 166. 

 Fresh-water productions, dispersal 



of, 383. 

 Fries, on species in large genera 

 being closely allied to other 

 species, 51. 

 Frigate-bird, 159. 

 Frogs on islands, 388. 

 Fruit-trees, gradual improvement 

 of, 30. 

 in United States, 74. 

 varieties of, acclimatized in 

 United States, 127. 

 Fuci, crossed, 269, 275. 

 Fur thicker in cold climates, 120. 

 Furze, 429. 



Galapagos Archipelago, birds of, 



386. 

 productions of, 391, 343. 

 Galaxias, its wide range, 380. 

 Galeopithecus, 156. 

 Game, increase of, checked by 



vermin, 60. 

 Gartner, on sterility of hybrids, 



261, 262. 



