442 



INDEX 



insect communities, as individuals, 



190. 



insectivores, 301. 



insects, as pollen carriers, 353 355. 

 ,, dispersal of, 323. 

 ,, primordial germ cells, 130. 

 ,, selection by, 363. 

 ,, sex determination, 135, 136, 



Fig. 67. 



,, spermatogenesis, 135. 

 ,, wings, 247. 

 instincts, adaptation in, 337. 



origin of, 184. 

 integral division of chi'omosomes, 



171, Fig. 77. 

 integration, 44. 

 integuments of ovule, 108. 

 intercellular substance, 57, 123. 

 interclavicle, 234, Figs. 89, 93. 

 intercrossing, swamping effects, 416. 

 interstitial cells, 116. 

 intussusception, 20. 

 invagination, 47. 

 invertebrates, dispersal, 325. 



,, geological range, 284. 



Ipomcea purpurea, fertilization, 351, 



352. 



irritability, 18. 

 irritable structures in flowers, 362, 



363. 



Isoetes, 105. 

 isogamy, 84, 89, 97. 

 isolation, 331, 416-419. 



Lamarck on, 380, 381. 

 Ithomiinse, 345. 



J. 



JELLY-FISH, 114, 121, 265. 



Joly, 286. 



Jurassic Epoch, 284. 



K. 



KAKAPO, 397. 



Kallima inachis, 338, Fig. 171. 



kangaroos, 301. 



3ant, 178. 



karyogamy, 128. 



karyokinesis, 69 79, Figs. 31 33. 



karyoplasm, 14, 69. 



karyosome, 70, 77. 



katabolism, 9, Fig. 1. 



kea, 398. 



khaki clothing, 342. 



kidney, effect of removal, 156. 



kinetic energy, 7. 



kingdoms, 226. 



kiwi, 258, 331, 397, Figs. Ill, 112. 

 knee, of horse, 240, Fig. 95. 



L. 



LABELLUM, 359. 

 labyrinthodonts, 243, 406. 

 Lagena, non-adaptive characters,419. 

 Lamarck, views of, 176, 373 382, 



418. 



Lamarck's four laws, 382. 

 Lamarckian factors, A. E. Wallace 



on, 393. 



,, ,, Charles Darwin 



on, 166, 392, 

 393. 



,, neglect of, 393. 



Eobert Cham- 

 bers on, 385. 



lampreys, dispersal, 325, 326. 

 distribution, 329. 



pineal eye, 258, 260. 

 lance-woods, 417. 

 land connections, former, 328, 329. 



,, planarians, dispersal, 325. 

 larva of Antedon, 274. 



Ascidian, 277, Fig. 130. 

 crabs, 276, Fig. 128. 

 echinoids, 276. 

 frog, 272, Fig. 121. 

 Grautia, 322, Fig. 164. 

 ophiuroids, 275, Fig. 127. 

 larvae, 272. 

 larval forms, dispersal, 321, 322. 



organs, 272, 275, 278. 

 Leach, 227. 

 leaf insects, 338, 339, Figs. 170, 171. 



structure, 63-65, Fig. 26. 

 leg, of man, 237, 238, Fig. 94. 

 legitimate unions, in Primula, 357. 

 legumin, 23. 

 Leigh, G. F., 348. 

 Lemuria, 328. 

 lemurs, distribution, 328. 

 leopard, distribution, 320. 

 Lepidosiren, 255, 291. 

 Leptinotarsa, mutation in, 159, 160. 

 leucocytes, 51, Fig. 15. 

 level, changes of in land, 328. 

 lianes, 350. 



life-history, 263 (see also ontogeny). 

 life, nature of, 2, 3, 4, 11. 

 Lilium, germination of pollen grain, 



Fig. 54. 

 limbs, of arthropods, 246, 247. 



,, vertebrates, 235246. 

 Limnas chrysippus, 346, Fig. 177. 

 linin network, 70. 



