GALE0P1TIIECU8. 



447 



Eye, structure of, 144. 



, correction for aberration, 163. 

 Eyes reduced in moles, 110. 



F. 



Fabre, M., on hymenoptera fighting, 



69. 

 — — , on parasitic spb.es, 216. 



, on Sitaris, 394. 



Falconer, Dr., on naturalisation of 



plants in India, 51. 

 , on elephants and mastodons, 



306. 

 and Cautley, on mammals of 



sub-Himalayan beds, 311. 

 Falkland Islands, wolf of, 351. 

 Faults, 268. 

 Faunas, marine, 317. 

 Fear, instinctive, in birds, 211. 

 Feet of birds, young molluscs ad- 

 hering to, 345. 

 Fertilisation variously effected, 154, 



161. 

 Fertility of hybrids, 238. 

 , from slight changes in con- 

 ditions, 252. 

 Fertility of crossed varieties, 255. 

 Fir-trees destroyed by cattle, 56. 



, pollen of, 164. 



Fish, flying, 140. 



, teleostean, sudden appearance 



of, 285. 



, eating seeds, 327, 346. 



, fresh-water, distribution of, 



343. 

 Fishes, ganoid, now confined to fresh 



water, 83. 

 — — , electric organs of, 150. 

 — , ganoid, living in fresh water, 



296. 



, of southern hemisphere, 338. 



Flat-fish, their structure, 186. 

 Flight, powers of, how acquired, 140. 

 Flint-tools, proving antiquity of man, 



13. 

 Flower, Prof., on the Larynx, 190. 



, on Halitherium, 302. 

 , on the resemblance between 



the jaws of the dog and Thyla- 



cinus, 375. 

 , on the homology of the feet of 



certain marsupials, 382. 

 Flowers, structure of, in relation to 



crossing, 73. 



Flowers, of composita; and nmbelli 



ferae, 116, 173. 



, beauty of, 161. 



, double, 230. 



Flysch formation, destitute of or- 

 ganic remains, 271. 

 Forbes, Mr. D., en glacial action in 



the Andes, 335. 



, E., on colours of shells, 107. 



, on abrupt range of shells in 



depth, 135. 

 , on poorness of paljeontologicaJ 



collections, 270. 

 , on continuous succession ot 



genera, 293. 



, on continental extensions, 323. 



, on distribution during Glacial 



period, 330. 

 , on parallelism in time and 



space, 361. 

 Forests, changes in, in America, 58. 

 Formation, Devonian, 305. 



, Cambrian, 287. 



Formations, thickness of, in Britain, 



268, 269. 



, intermittent, 277. 



Formica rufescens, 216. 



, sanguinea, 217. 



, flava, neuter of, 231. 



Forms, lowly organised, loDg en- 

 during, 99. 

 Frena, ovigerous, of cirripedes, 148. 

 Fresh-water productions, dispersal 



of, 343. 

 Fries, on species in large genera 



being closely allied to other species, 



45. 

 Frigate-bird, 142. 

 Frogs on islands, 350. 

 Fruit-trees, gradual improvement of, 



27. 



• in United States, 66. 



, varieties of, acclimatised in 



United States, 114. 

 Fuci, crossed, 249, 343. 

 Fur, thicker in cold climates, 107. 

 Furze, 388. 



G. 



Galapagos Archipelago, birds of, 348. 



, productions of, 353, 355. 



Galaxias, its wide range, 343. 

 Galeopifhecus, 130. 



