450 



INDEX. 



Myrmecophaga, 307. 

 Myrmeleon, 337. 



Nails, 321. 



Natural selection, inadequacy of, 393, 



307, 401, 407, 410, 413, 41S, 42I1 423' 

 Nature, balance of, 207 ; definition of, 



169, 345. 375- 

 Neck, elongation of, in birds, 274, 311, 



317 ; giraffe, 316, 351 ; ostrich, 317. 

 Needs, 245, 270, 274, 281, 295, 302, 324, 



334i 346, 350. 351. 352- 

 Neodarwinism, 422. 

 Neolamarckism, 2, 382, 396, 398, 422. 



Ophidia, atrophy of legs of, 290, 309, 



Organic sense, 325, 327, 336. 



Organs, changes in, 310 ; origin of, pre- 

 cedes their use, 223 ; follows their use, 

 305, 346 ; atrophy of, 274, ago, 303, 306, 

 307, 309, 311, 315 ; new production of, 

 346, 412, 420. 



Orang-outang, 364. 



Osborn, H. S., 403. 



Ostrich, 317. 



Otter, 312. 



Ox, 315. 



Oyster, 419. 



Paleontology, 136 ; invertebrate, 135, 



149. 

 Pallas, 137. 



Penchants, 281, 293, 328, 331. 

 Perrier, E., 26, 411. 

 Petaurista, 338. 



Philosophy, moral, Lamarck's, 379. 

 Phoca vitulina, 338, 344. 

 Phylogeny, 130. 

 Pigeons, 298 ; fantail, 504. 

 Planorbis, 387. 

 Plants, changes due to cultivation, etc., 



251, 267, 274, 283, 296, 297 ; cultivated, 



298. 

 Population, over-, checks on, 287, 288. 

 Preformation, 162, 218, 222. 

 Propensities, 281, 293, 328, 335, 349, 



351- 

 Proteus, 308. 

 Pteromys, 339. 



Ranunculus aquatilis, 251, 300. 



Religion and science, 372. 



Reptiles, 342. 



Revolutions of the earth, 109, 142. 



Rousseau, J. J., 17, 18. 



Roux, W., 421. 



Ruminants, 315. 



Ryder, J. A., 403. 



Science and religion, 372. 



Sciurus volans, 338. 



Scott, W. B., 403. 



Sea, former existence of, 109, no, 148. 



Seal, 338, 344. 



Segments, origin of, 421, 



Segregation, in man, 320, 369. 



Selection, mechanical, 4x0. 



Semper, C, 406. 



Series, animal, branching, 235, 264, 282. 



Serpents, origin of, 290, 309; eyes of, 



3M- 

 Sexual selection, 219, 224. 

 Shell, bivalve, origin of, 418 ; crustacean, 



418. 

 Shells, deep-water, 112 ; fossil, 40, no, 



T25, 131 ; Lamarckian genera, 183. 

 Simla satyrus, 367 ; troglodytes, 364. 

 Sloth, 320. 

 Snakes, atrophy of legs of, 290, 309 ; eyes 



of, 314 ; origin of, 290, 309 ; tongue of, 



3i:3- 



Sole, 314. 



Species, BufEon's views on, 201, 211 ; 

 definition of, 252, 255, 262, 267, 275 ; ex- 

 tinct, 126 ; Geofiroy St. Hilaire, views 

 on, 214; Lamarck's views on, 183; 

 modification of, 131; origin of, 131, 283 ; 

 stability of, 271, 277, 401 ; variation in, 

 ^78. 



Speech, 370. 



Spencer, Herbert, 371, 382, 384, 415. 



Spermist, 21S. 



Sphalax, 307. 



Spines, 251, 393, 414. 



Sponges, 194. 



Squirrel, flying, 338, 339. 



Stimulus, external, 348, 354, 393. 



Struggle for existence, 207, 237, 287. 



Surroundings, 214, 421 ; local, 410. 



