INDEX 



Koala. 582, 609 



Koch, and biogenesis, 260 



La Brea Pits, 621 



Labrum, of locust, 447 



Lacertilia, 567, 572 



Lacrymana, 257 



Lactase, 72 



Lactic acid, 36, 114, 121 



Lactoflavin, see RibollaNin 



Lacunae, 61 



Lamarck, 646 



Lamarckian Theory, 646 



Lampreys, 541, 555 



Lampsilis, 370, 377 



Lamp shells, see Brachiopoda 



Lancelet, 550 



Land bridges, 632, 644 



Large intestine, 48, 50, 74, 76, 84 



Lar\a, 159; acanthor, 354, 355; amphiblastula, 

 281; auricularia, 505, 506; bipinnaria, 496; 

 cyphonautes, 361; echinopluteus, 501; in- 

 fusoriform, 271, 272; ophiopluteus, 498, 

 499; pentacrinoid, 507; pilidium, 342, 343; 

 planuia, 301; tadpole, 547, 548, 550, 562, 

 567; tornaria, 539, 543; trochophore, 356, 

 375, 386, 401, 418; veliger. 375, 386 



Larvacea, 545, 550 



Larvae, of insects, 455 



Larynx, 55, 119 



Lateral mesoderm, 156 



Latrodecles mactans, 482 



Laurel leaf point, Solutrean, 645 



Law, 5 



Leafhopper, 474 



I^cather stars, 497 



Lecithin, 26 



Leeches, 396, 419, 420; affinities with oligo- 

 chaetes, 420; specializations related to 

 parasitism, 417 



Leeuwenhoek, Antony van, 140, 229, 260, 345 



Lefevre, George, Sr., 143 



Lemur, 580, 591, 638 



Lens, of eye, 105, 154 



Lens vesicle, 154 



Upas, 438, 439 



Lepidoptera, 465, 466-469 



Lepulosiren, 558 



Lepidosleus, 558 



I^ptinotarsa, 464 



Leplosynapta, 507 



Leucocytes, 64; granular, 64; non-granular, 

 54, 64; polymorphonuclear, 64 



Leuconoid sponges, 277 



I^ucnphaea mnderae, neurosecretorv function, 

 526 



Ixuaisiilenia, 273, 276, 278 



LH, 122 



Lihinuu 441 



Life, origin of, 616, 618 



694 



Life cycle, of Asteroidea, 496; of Crinoidea, 

 507; of Echinoidca, 501; of Holothuroidea, 

 505; of Ophiuroidea, 498; of tapeworms, 

 338, 340; of trematodes, 330 



Life cycles, and metamorphosis, of insects, 

 454-457 



Ligaments, 61 



Light-sensitive pigments, 106-107, 108 



Limbless lizards, 571 



Limbs, of Tetrapoda, 554; of vertebrates, 632 



Limidus, 423, 480, 481, 622 



Linoula, 362-363, 388 



Linkage, 190-194 



Linked genes, 190 



Linnaeus, 216; and moUusks, 369 



Lionotus, 257 



Lions, 580, 587 



Lipase, 72 



Lipids, 23, 26, 30, 37, 70, 72, 75, 77; trans- 

 port, storage, and use of, 77 



Lipoproteins, 27 



Liriope, 302 



Lister, and asepsis, 260 



Little Brown Bat, 584 



Liver, 47, 48, 49, 56, 61, 72, 77, 82, 84, 154 



Liver fluke, 330 



Living fossils, 394, 630 



Lizards. 541; temperature regulation in, 597 



Llama, 580, 588, 631 



Lobe-finned fishes, 541, 557, 562. 630 



Lobosa, 236 



Lobster, 423, 440; appendages, 427; gills, 

 429; green gland, 519 



Locomotion, 94; in Amoeba, 231 233; in cray- 

 fish, 462; in Ctenophora, 310; of annelids 

 and arthropods, 484; of earthworm, 414; of 

 pjia/ena, 241-242; of Hydra, 293, 294; of 

 leech, 417; of .Vereis, 397, 398; of Para- 

 mecnim, 250-253; of Peranema, 243; of star- 

 fish, 490, 495; of Thyone, 504 



Locust, 443-454, 462; "fos,silized, 620 



Loeb, Jacques, 143 



Logi.stic curve, 610 



Lobi^o pealeii, 388, 389, 390, 391 



Long Island, 632 



Lophophore, of Brachiopoda, 362, 363, 364; 

 of Fxtoprocta, 357, 359; of Pterobranchia. 

 544 



Lophopus, 362 



Lumhncus, 406, 416; L. terrestris, 403, 405 



Luminescence, .Soctiluca. 243 



Luminescent fishes, 559 



Lung fluke, 332 



Lungfish, 541,557,630 



Lung.s, 54, 56, 79, 82, 90, 92, 125, 155; of earlv 

 fishes, 557; of invertebrates, 517; of terres- 

 trial gastropod.s, 385 



Luteinizing hormone, 122 



Luteotropic hormone, 122 



Lutra canadensis, 587 



