tNDS^, 



525 



Divergence of chaiacter, 101. 



Dog, resemblance of mw to that 

 of the Thylacinvis, 441. 



Dogs, hairless, with imperfect 

 teeth, 11. 



descended from several wild 



stocks, 17. 



, domestic instincts of, 248. 



, inherited civilization of, 



248. 



, fertility of breeds together, 



283. 



^, of crosses, 303. 



, proportions of body in dif- 

 ferent breeds, when youna-, 

 461. 



Doniestication, variation under, 6. 



Double flowers, 271. 



Downing, Mr., on fruit-trees in 

 America, 78. 



Dragon flies, intestines of, 175. 



Drift-timber, 385. 



Driver-ant, 274. 



Drones killed by other bees, 194. 



Duck, domestic, wings of, re- 

 duced, 10, 



, beak of, 217. 



, logger-headed, 166. 



Duckweed, 407. 



Dugong, affinities of, 431. 



Dung-beetles with deficient tarsi, 

 129. 



Dytiscus, 407. 



Earl, Mr. W., on the Malay 

 Archipelago, 415. 



Ears, drooping, in domestic ani- 

 mals, 10. 



, rudimentary, 472. 



Earth, seeds in roots of trees, 385. 



charged with seeds, 387. 



Echinodermata, their pedicellaria;, 

 225. 



Eciton, 273. 



Economy of organization, 139. 



Edentata, teeth and hair, 187. 



, fossil species of, 4921 



Edwards, Milne, on physiological 

 division of labor, 105. 



— —, on gradations of structure, 

 185. 



Edwards, on embryologica\ char- 

 acters, 434. 



Eggs, young birds escaping from, 

 80. 



Egypt, productions of, not modi- 

 fied, 300. 



Electric organs, 178. 



Elephant, r^te of increase, 60. 



, of Glacial period, 135. 



Embryology, 455. 



Eozoon Canadense, 339. 



Epilepsy inherited, 128. 



Existence, struggle for, 57. 



, condition of, 198. 



Extinction, as beariqg on natural 

 selection, 115. 



, of domestic varieties. 111. 



, 347. 



Eye, structure of, 171. 



Eye, correction for aberration, 

 194. 



Byes, reduced, in moles, 130. 



Fabre, M., on hymenoptera fight- 

 ing, 83. 



, on parasitic sphex, 355, 



, on Sitaris, 465. 



Falconer, Dr., on naturalization 

 of plants in India, 61. 



— — • on elephants and mastodons, 

 361. 



and Cautley, on mammals of 



sub-Himalayan beds, 868. 



Falkland Islands, wolf of, 414. 



Faults, 317. 



Faunas, marine, 874. 



Fear, instinctive, in birds, 349. 



Feet of birds, young molluscs ad- 

 hering to, 407. 



Fertilization variously effected, 

 183, 191. 



Fertility of hybrids, 280. 



, from slight changes in con- 

 ditions, 296. 



— -^ of crossed varieties, 301, 



Fir-trees destroyed by cattle, 67. 



, pollen of, 195. 



Fish, flying, 166. 



, teleostean, sudden appear- 

 ance of, 336. 



, eating seeds, 386, 408. 



