INDEX 



593 



Interfilar substance, 53 

 Interhyal bone, 496 

 Intermaxillaries, 461 

 Intermedium, 465 

 Internal secretions, no 

 Interparietal bone, 546 

 Interradii, 124, 293 

 Intcrse-'tal space, 227 

 Interve. t ebral cartilage, 455 



ligaments, 550 

 Intestine, 95 

 Intraseptal space, 227 

 Intratarsal joint, 524 

 Involuntary muscles, Si 

 Iris, 120, 476 

 Ischiopodite, 97 

 Ischium, 464 

 Isodont, 318 

 Isogametes, 168 

 Isopoda, 385 

 Isoptera, 419 

 Itch, 397 

 Ixodes, 397 



Jacobson's organ, 475 

 Japyx, 419 

 Jassidse, 428 

 Jays, 544 

 Jigger flea, 431 

 Jugal bone, 462 

 Jugular vein, 484 

 Julus, 434 

 June bugs, 424 



Kallima, 38 

 Kangaroos, 561 

 Karyokinesis, 60 

 Katydid, 421 

 Keratin, 67, 205 

 Keyhole limpet, 333 

 Kidneys, 105, 488 

 Kingfishers, 544 

 Kinosternon, 527 

 Knee pan, 465 

 Kcenenia, 393 

 Krause's corpuscle, 473 



Labial cartilages, 460 



palpi, 320 

 Labium, 405 



Labor, division of, 63, 126 

 Labrida?, 510 

 Labrum, 40=; 

 Labyrinth, 117, 478, 479 

 Labyrinthodonta, 519 

 38 



Lacerta, 530 

 Lacertilia, 529 

 Lace wings, 422 

 Lucinia, 406 

 Lacrimal gland, 477 

 Lacunar blood system, 103 

 Ladder nervous system, 1 13 

 Lady birds, 424 

 Lacmodipoda, 384 

 Lagena, 117, 478 

 Lagomorpha, 566 

 Lagomys, 566 

 Lamarckism, 46 

 Lamblia, 184 

 Lamellibranchiata, 317 

 Lamellicornia, 424 

 Lamellirostres, 543 

 Lamna, 451, 546 

 Lamprey eels, 491 

 Lampyridae, 424 

 Land crabs, 382 

 Lantern of Aristotle, 305 

 Larus, 543 

 Larva, 150, 414 

 Larval organs, 1 50 

 Larynx, 482, 516 

 Laryngeal cartilages, 461 

 Lateralia, 372 

 Lateral line organs, 499 

 Lateral organs, 271 

 Latrodectes, 396 

 Laurer's canal, 344 

 Lazy worm, 267 

 Leaf hoppers, 428 

 Leather turtles, 527 

 Leda, 323 

 Leeches, 281 

 Lemnisci, 269 

 Lemurs, 572 

 Lens, 119, 477 

 Lepas, 159, 373 

 Lepidurus, 366 

 Lepidonotus, 277 

 Lepidoptera, 432 

 Lepidosauria, 528 

 Lepidosiren, 513 

 Lepidosteus, 508 

 Lepisma, 418 

 Leptasterias, 298 

 Leptalis, 39 

 Leptocardii, 439 

 Leptocephalus, 510 

 Leptochela, 386 

 Leptoclinum, 446 

 Leptodiscus, 185 



Leptodora, 366 

 Leptomedusa-, 2 1 7 

 Leptoplana, 242 

 Leptostraca, 375 

 Lepus, 566 

 Lernasa, 370 

 Lernasocera, 370 

 Lernasopodida?, 370 

 Leucetta, 203 

 Leucocytes, 78 

 Leucon, 203 

 Leucones, 204 

 Leucortis, 204 

 Leucocytozoon, 183 

 Leucosoidea. 382 

 Leucosolenia, 204 

 Libellula, 420 

 Libinia, 382 

 Lice, bee, 43 1 



bird, 420 



book, 420 



human, 430 



plant, 430 



Lieberkiihn's glands, 69 

 Lieshmania, 184 

 Life, origin of, 127 

 Ligulida?, 253 

 Limacidse, 336 

 Limacinida?, 335 

 Limax, 336 

 Limbs, skelton of, 462 

 Limicola, 279 

 Limnadia, 366 

 Limnaea, 336 

 Limnoria, 386 

 Limpets, 333 

 Limulus, 387 

 Linckia, 296 



Linear nervous system, 112 

 Lines of growth, 317 

 Lineus, 258 



Lingual ribbon, 314. 329 

 Linguatulida, 397 

 Lingula, 290 

 Linin, 56 

 Linnean system, 7 

 Liobunum, 31)4 

 Lion, 565 



Lips, 554 



Liquor cerebrospinalis, 467 

 Liriope, 216. 218 

 Lithistida?, 204 

 Lithobius, 403 

 Lithodidos, ,}8j 

 Lithodomus, 323 



