710 



1NDKX. 



Idotsea, nervous system of, 2 

 290 



Idyia roseola, 93 



Iguana, 504 



Iguanodon, 515 



Individuality, 656 



Ineducabilia, 582 



Infusoria, 31, 40 



Inheritance, law of, 11 



Insectivora, 587, 629 



Insects, anatomy of, 308 

 brain of, 317 

 characters of, 307, 344 

 classification of, 36J> 

 digestion in, 316 

 ears of, 325 

 eye of, 325 

 embryology of, 329 

 locomotion in,. 327 

 metamorphosjs of, 308 

 parthenogenesis in, 333 

 polymorphism in, 348 

 respiration of, 323 

 senses of, 326 

 useful, 334 



Instinct, nature of, 680 



Isopoda, 285 



Isurus punctatus, 420 



Ixodes albipictus, 341 

 bovis, 341 



JACCHUS, 620 

 Jaws, 631 

 Jelly-fish, 62 

 Julus, 336 ' 



KANGAROO. 575, 577 

 Katydid. 676 

 Killer-whale, 595 

 King-bird, 552 

 King-crab, 297 

 Kinglet, 555 

 Kiwi-kiwi, 538 

 Kogia Floweri, 594 



LABYRINTHICI, 457 

 Labyrinthodon, 482, 483 

 Labyrinthodontia, 482 

 Lacertilia, 501, 517 

 Lachnosterna fusca, 352 

 Lactophrys trigonus, 462 

 Lselaps, 515 



Lagopus leucurus, 546, 546 

 Lamellibranchiata, 222 



classification of, 236 

 Lampreys, 409 

 Lamp shells, 146 

 Lancelet, 406 



Larva of Echinoderms, 178, 187, 

 192, 194, 202 



Hydrozoa, 83 



Insects, 328 



Worms, 171 

 Lasso-cells in Aurelia, 67 



Hydra, 53 



Infusoria, 37 



Polyps, 76, 81 



Sponges, 43 



Worms, 101 



Lateral line of fishes, 442 

 Leaf insect, 657 

 Leech, 164 

 Lemnisci, 123 

 Lemur, 618 

 Lepas fascicularis, 273 

 Lepidoptera, 357, 367 

 Lepidosiren paradoxa, 430 

 Lepidosteus, development of, 432 



osseus, 431 



platystomus, 432 



spatula, 432 

 Lepidurus Couesii, 282 

 Lepomonera, 22 

 Leptocardii, 406, 408 

 Leptocephalus, 446 

 Leptodiscus medusoides, 34 

 Leptoplana, 102 

 Leptosynapta Girardii, 216 

 Leptycliiister, 196 



