INDEX 



549 



Ichneumon flies ; see Hymenoptera. 



Ichthyophis, 360. 



Ichthyornis, 379. 



Ichthyosaur, 365. 



Identity retention, 7. 



Iguana tuberculata, 371. 



Iguanodon, 331. 



Ilium, 331. 



Imago, 288. 



Impulses, of nerves, 33. 



Individuality, 37-40; complexity of, 

 492; generation of, 37-38, 420; 

 uniqueness of, 493. 



Infusoria (ciliates), 192-193. 



Inheritance, 494-495, 501-503. 



Insecta (Arthropoda), 182, 202, 237, 

 255, 267-279, 308-319; see Archip- 

 tera ; Coleoptera ; Collembola ; 

 Corrodentia ; Diptera ; Hemip- 

 tera (Rhynchota) ; Hymenoptera ; 

 Isoptera; Lepidoptera; Mallo- 

 phaga ; Mecaptera (Panorpatse) ; 

 Neuroptera ; Odonata ; Orthop- 

 tera; Protura ; Siphonaptera; 

 Siphunculata ; Thysanoptera ; 



Thysanura ; Trichoptera. 



Insectivora, 399. 



Invertebrates, 178, 467. 



Irritability, 10. 



Isocrania, 227. 



Isopoda, 258. 



Isoptera, 271. 



Isospondyli, 352-353. 



Isotherm, 454, 455. 



James, William, 506, 517, 535. 

 Jellyfish (Ccelenterata), 95. 

 Jennings, H. S., 80, 138, 194, 195, 



197, 198, 219, 220. 

 Johannsen, O. A., 279. 

 Johnstone, James, 478. 

 Jordan, David Starr, 341, 357, 516, 



520. 

 Jurassic Period, 148, 379. 



Kalm, Peter, 169. 

 Kalmia, 169. 



Kangaroo; /^Marsupials. 

 Katabolic process, 18, 20, 34. 



Katydids , see Orthoptera. 



Keats, 500. 



Keep, Josiah, 252. 



Keeweenawan Period, 148. 



Kellicott, W. E., 341. 



Kellogg, V. L., 279. 



Kennicott, 524. 



Kermes, 308, 309. 



Kewatin Period, 148. 



Kidneys, 30. 



King, Homo neanderthalensis of, 440. 



Kinorhyncha, 181. 



Kiwis ; see Apteryx. 



Knight, C. R., 153, 155. 



Knowlton, F. H., 159, 395. 



Koch, 486. 



Kollar, 41. 



Lac, 309. 



Lacerta vivipara, 364. 



Lacertilia, 370. 



Lace-wing fly ; see Chrysopa. 



Lagena Marine, 192. 



"Lake" (coloring), 309. 



Lamarck, 64, 143. 



Lamellae, 246. 



Lamellibranchiata, 249-250. 



Lampreys ; see Cyclostomes. 



"Lampshells," 180, 227. 



Lampsilis luteolus, 446. 



Lance Epoch, 148. 



Larvacea, 323. 



Larvae, of insects, 288. 



Lasius, 302. 



Laurel ; see Kalmia. 



Laurent, M., 482. 



Laws of life, i, 48, 535. 



Lazear, J. W., 203. 



Leadership, 98. 



Leeches (Hirudinea), 181, 237, 241. 



LeGros, C. V., 285. 



Lemur varius, 409. 



Lepidoptera, 273, 274, 286-292; 



see Microlepidoptera ; Rhopalo- 



cera ; Saturniidaa. 

 Lepidosiren, 345. 

 Lepisma, 268. 

 Leucocytes, 14, 26. 

 Lice : Biting lice (on birds) ; see 





