7 i8 



INDEX 



Labial palps, 245, 246, 313. 



Labium, 313, 372. 



Labyrinthodonts, 526. 



Lacerta, 538, 557; Lacertida, 538, 557; 



Lacertilia, 537. 

 Lachesis, 539. 

 Lachnoslerna, 362. 

 Lacteals, 638. 

 Lamopsylla, 360. 

 Lagomys, 643. 

 Lagopus, 606. 

 Lama, 671. 



Lamellibranchiata, 261. 

 Lamellicornia, 361. 

 Lampetra, 420, 421. 

 Lamprey, 414, 415-420. 

 Lampyridce, 361. 

 Lancelet, 393, 394. 

 LaniidcB, 591. 

 Laomedea, 120. 

 Lapwing, 607. 



Laridce, 590, 607, 608; Larus, 608. 

 Lark, 591. 

 Larva, 323, 324. 

 Larvacea, 300, 393. 

 Larynx, 482, 483, 639. 

 Latax, 655. 



Lateral lines, 172, 410, 415, 427. 

 Leda, 262. 

 Leech, 236. 



Lemming, 660, 683-684. 

 Lemur, 644, 662, 663, 696; Lemuridce, 



662, 696; Lemuroidea, 644. 

 Lens, 412. 

 Leopard, 656. 

 Lepas, 294, 300. 

 Lepidoptera, 337, 350-356. 

 Lepidopleurus, 252. 

 Lepidosiren, 472; Lepidosirenidce, 445, 



471- 

 Lepidoslernon, 538. 

 Lepisma, 337, 338. 



Lepisosteida, 443, 454; Lepisosteus, 454. 

 Lepomis, 467. 



Leporidce, 633, 658 ; Lepus, 643. 

 Leptinotarsa, 362. 

 Leptocephalidce, 444. 

 Leptodiscus, 48. 

 Leptodora, 294. 

 Leptomedusa, 128. 

 Leptoplana, 157. 

 Leptus, 380. 



Leucocytes, 484. 



Leucosolenia, 92, 93, 94, 105. 



W«K, 539. 



Libinia, 302. 



Life, origin of, 12; succession of, 697. 



Ligula, 313. 



Litnax, 258, 259. 



Limicola, 236. 



Limnobatidce, 348. 



Limpet, 258. 



Limulus, 383. 



Linguata, 512, 518-522. 



Lingula, 186. 



Linin fibers, 13. 



Linyphiada, 377. 



Lion, 643, 656. 



Liriope, 122, 128. 



Lithobius, 310, 311. 



Lithodytes, 520, 521. 



Littorina, 258. 



Liver, 246, 247, 401, 402, 438, 481. 



Liver fluke, 157. 



Lizards, 527, 536, 537, 551-557- 



Llama, 667, 671. 



Lobosa, 39. 



Lobster, 301, 303. 



Locomotion (see Behavior). 



Locust, 344, 345 ; LocustidcB, 345. 



Loligo, 264-267. 



Loon, 589, 599. 



LophiidcB, 444, 468; Lophius, 468. 



Lophobranchii, 444. 



Lophophore, 184, 186. 



Louse, 341, 345, 346, 359. 



Loxocemus, 539. 



Loxodonia, 645, 672, 673. 



Loxophyllum, 63. 



Lucanida, 361. 



Lucernaria, 132. 



Lumbricus, 215-231; behavior, 228; 

 circulation, 221, 222; digestion, 220; 

 economic importance, 230; excretion, 

 223; external features, 216; nervous 

 system, 223, 224; reproduction, 226, 

 227; respiration, 223; sense organs, 

 226. 



Lung-books, 373, 374, 379. 



Lung-fishes, 471-472. 



Lungs, 401, 402 (see respiratory system). 



Lutra, 655. 



Lycosa, 376. 



LygaMm, 348. 



