INDEX 



601 



Interradial septum, 195 

 Interradii, 192 



Interstitial cells, 130, 140, 442 

 Intertidal fauna, 483 



Intestinal worms, 1G6, 109, 175, 178-180, 497 

 Intestine, 176, 210, 212, 230, 231, 253, 277, 317, 

 339, 401 

 (See also Alimentary canal) 

 Intracellular differentiation, 86, 93 

 Intussusception, 17 

 Invagination, 119, 230, 315, 449 

 Invertebrates, 117, 511 

 Involuntary muscle tissue, 100 

 Involuntary muscles, 321 

 Iodine, 19 

 Ionization, 11, 479 

 Ions, 11 



Iris, 223, 332, 333, 468 

 Irish elk, 523 

 Iron, 18, 19 

 Irritability, 17, 467 

 Ischium, 321, 388 

 1 schnochit(jn, 218 

 Island faunas, 504 

 Islets of Langerhans, 404, 405 

 Isolation, 500 

 Isopods, 201, 262 

 Itch mite, 301, 302 

 Ivory, 421 



Java ape man, 424 



Jaws, 242, 245, 335, 338, 350, 304, 384, 380-387, 



406, 407, 415, 422 

 Jelly fishes, 143-145, 147, 149, 150, 460 

 Jennings, H. S., 197 

 Jugular vein, 339, 409 

 Jumping mice, 417, 509 

 Jungle fowl, 405 

 Jurassic period, 225, 511, 513, 515 



K 



Kallima, 485 



Kangaroo, 412, 413 



Karyokinesis, 48 



Karyosome, 29, 30 



Katabolism, 37 



Katydids, 278, 283 



Keel, sternum, 393 



Kelvin, 26 



Keratin, 98 



Keweenawan period, 511, 512 



Kidney, 210, 213, 325, 326, 442, 460 



(See also Excretory organs; Mesonephros; 

 Metanephros; Pronephros) 

 Kinetic energy, 14, 15, 452 



(See also Heat; Light; Movement, etc.) 

 King, A. F. A., 90 

 King crabs, 302, 303, 514 

 King of the herrings, 358 

 Kingfisher, foot, 400 

 Kiwi, 504, 505 



Labial palps, 212 



Labium, 272, 273 



Labruiii, 272, 273 



liabyrinths, ear, 330 



Lace-winged flies, 290 



Lachrymal glands, 333, 362 



Lacunae, bone, 99, 320 



Ladybird beetles, 289 



Lake communities, 479 



Lamarck, 517, 542 



I^amellae, branchial, 211 



Lamellibranchiata, 221 



Lamp shells, 190 



Lamprey, 334-337, 442, 449 



Lampsilis ligamentina, 214 



Lampsilis luteola, 216 



Lancelet, 314 



Langerhans, islets of, 464, 465 



Large intestine, 322, 323 



Larvae, 116, 131, 132, 149, 150, 172, 173, 178-181, 

 184, 189, 198, 200, 214, 225, 258, 263-266, 

 270, 278-281, 283, 286-292, 310, 311, 315, 

 336, 345, 355, 356, 367, 368, 450, 486, 497 



Larval organs, 451 



Larval thread, 214 



Larynx, 322, 324, 408 



Lasius niger americanus, 284 



Lateral canals, 193, 194 



Lateral fissure, 423 



Lateral line, 176, 346, 353 



Lateral vein, 317, 339 



Latrodectus mactans, 299 



Laurer's canal, 166, 167 



Laveran, 90 



Lavoisier, 452 



Leaf beetle, 285 



Leaf butterfly, 486 



Leaf insect, 486 



Learning, 473 



Lecithin, 19 



Leeches, 245-246, 249, 403, 498 



Leeuwenhoek, 552 



Legs, 250-253, 257, 258, 200-203, 208-270, 272- 

 274, 281, 296, 297, 304, 316, 366, 396, 401, 

 412, 422, 423, 483, 484 

 (See also Limbs) 

 bones, 391 



Lemming, 502 



Lemuria, 500 



Lemurs, 415, 500 



Lens, eye, 223, 247, 332, 333, 302, 309 



Lepidoptera, 285, 291 



Leptsosteus, tail, 349 



Lepisosteus osseus, scales, 347 



Lepisosteus tristoechus, 345 



Lepus cuniculus, brain, 410 



Lethal genes, 535 



Leucocytes, 99, 131, 324, 490 



Lice, 283, 289, 497, 498 



Lids, eye, 333, 369 



Life, 17, 23-27, 452 



Life cycle, 43, 432-434 

 (See also lAfe histories) 



