542 



INDEX 



Edwards, on embryological characters, 



ii. 219 

 Eggs, young birds escaping from, i. 



129 

 Egypt, productions of, not modified, 



i. 289 

 Electric organs, i. 260 

 Elephant, rate of increase, 1. 102-103 



of Glacial period, i. 201 



Embryology, ii. 248 

 Eozoon Canadense, ii. 90 

 Epilepsy inherited, i. 193 

 Existence, struggle for, i. 98 



, Conditions of, law of the, L 287 



Extinction, as bearing on natural 



selection, i. 175-176 



of domestic varieties, i. 171 



, ii. 101 



Eye, structure of, i. 251 



correction for aberration, i. 281 



Eyes, reduced in moles, i. 196 



Fabbe, M., on hymenoptera fighting, 

 i. 132 



, on parasitic sphex, i. 363 



, on Sitaris, ii. 261 



Falconer, Dr., on naturalization of 

 plants in India, i. 103 



— — , on elephants and mastodons, ii. 

 121 



and Cautley, on mammals of sub- 

 Himalayan beds, ii. 130 



Falkland Islands, wolf of, ii. 192 



Faults, ii. 60 



Faunas, marine, ii. 139 



Fear, instinctive, in birds, i. 356 



Feet of birds, young moUusks adhering 

 to, ii. 183 



Fertilization variously efEected, 1. 267, 

 278 



Fertility of hybrids, ii. 12 



' , from slight changes in condi- 

 tions, ii. 33 



Fertility of crossed varieties, ii. 40 

 Fir trees destroyed by cattle, i. Ill 



, pollen of, i. 283 



Fish, flying, i. 244 



, teleostean, sudden appearance 



of, ii. 87 



, eating seeds, ii. 154, 184 



, fresh-water, distribution of, ii. 



181 

 Fishes, ganoid, now confined to fresh 



water, i. 154 



, electric organs of, i. 260-261 



, ganoid, living in fresh water, ii, 



106-107 



, of southern hemisphere, ii. 172 



Flat-fish, their structure, i. 316-317 

 Flight, powers of, how acquired, i. 



244 

 Flint tools, proving antiquity of man, 



i. 44 

 Flower, Prof., on the Larynx, i. 324 



, on Halitherium, ii. 115 



, on the resemblance between the 



jaws of the dog and Thylacinua, ii. 



229 

 , on the homology of the feet of 



certain marsupials, ii. 242 

 Flowers, structure of, in relation to 



crossing, i. 137-138 

 , of compositae and umbelliferse, 



i. 205, 296-297 



, beauty of, i. 278 



, double, i. 386 



Flysch formation, destitute of organic 



remains, ii. 65 

 Forbes, Mr. D., on glacial action in 



the Andes, ii. 168 



, E., on colors of shells, i. 191 



, on abrupt range of shells in 



depth, i. 236 

 , on poorness of paleontological 



collections, ii. 63 

 , on strata beneath Silurian sys- 

 tem, ii. 90 



