47 6 



INDEX. 



Integument (see skin) annulata, 222 ; 

 echinoderms, 238 ; mollusks, 242 ; 

 arthropods, 276 ; vertebrates, 322 ; 

 fish, 359 ; amphibians, 373 ; rep- 

 tiles, 382 ; birds, 398 ; mammals, 431 



Intercellular substance, 41 



Intestine, 333 (see digestive system) 



Invagination, 34 



Irritability, n, 70 (see sensation) 



Jackals, 443 



Jelly-fish, 171 (see medusa) 



Jugular vein, 362 



Katabolism, 15, 60 



Katydid, 249, 295 



Keeled birds, 410 



Kidney, 66, 341 (see nephridia) 



King crab, 303 



Kingfisher, 419 



Laboratory exercises protozoa, 142 ; 

 porifera, 156; coelenterata, 165; un- 

 segmented worms, 185 ; echino- 

 derms, 200; annulata, 216; mol- 

 lusks, 234 ; arthropods, 261 ; chor- 

 data, 312 ; fish, 312 ; amphibian, 315 ; 

 reptile, 380 ; birds, 394 ; mammals, 

 427 



Labium, 269 



Labrum, 269 



Lacertilia, 388 



Lacinia, 269 



Lacteals, 436 



Lacunae bone, 49, 50; blood, 280 



Ladybird (ladybug) beetle, 302 



Lamella (bone), 49, 50 



Lamellibranchiata, 252 



Lamprey, 126, 311 



Lampropeltis, 391 



Lancelet, 309, 310 



Lanius, 425 



Lark, 424 



Larynx, 335 



Leech, 219, 232 



Leopard, 443 



Lemurs, 447 



Lepidoptera, 300 



Lepidosiren, 370 



Lepornis, 369 



Leucania, 300 



Lice, 296 



Life nature of, 8 ; relation to pro- 

 toplasm, 8 



Limax, 256, 257 



Limbs, bones of, 329 



Limntza (host of liver fluke, 190). 237 



Limpet, 255, 256 



Liuiulus, 278, 303 



Lion, 443 



Littoral fauna, 129 



Littorina, 255 



Liver-fluke, 188, 189 



Lizards, 388 



Lobster, 289, 290 



Locomotion, 69 



Locomotor organs protozoa, 148 ; 

 porifera, 161 ; coelenterata, 174; un- 

 segmented worms, 197 ; echino- 

 derms, 207, 210; annulata, 222 ; 

 mollusks, 243 ; arthropods, 276 ; 

 fishes, 360 ; amphibia, 375 ; reptiles, 

 382 ; birds, 397 ; mammals, 428 



Locust-borers, 302 



Locusts, 294 



Lophobranchii, 369 



Lophophore, 195 



Lumbar vertebrae, 327 



Lumbrictis, 216 



Lung-fishes, 369 



Lungs, 63, 335 



Lymph, 51 



Lymphatics, 435 



Macromere, 227, 249 



Madreporic body, 207, 210 



Malacostraca, 289 



Malpighian tubule, 278 



Mammals, 135 



Mammary glands, 324, 431 



Mammoth, 443 



Man, 447 



Manatee, 441 



Mandible, 263, 269 



Mantle, 242 



Marsupials, 429, 440 



Marsupium, 429 



Marten, 443 



Mastodon, 443 



Maturation (of ovum), 30, y^ 



Maxilla, 263, 269 



Maxillary palpus, 269 



Maxillipeds, 263, 269 



May-flies, 296 



Median eye, 385 



Medullary sheath (nerve), 54, 55 



Medusa-type, 171. 



Megalops, 285 



Mesenchyma, 158 (mesogloea) 



Mesenteron, 60, 277, 330 



Mesentery, 314 



Mesoblast (see mesoderm) 



Mesoderm, 35 



Mesothorax, 269 



Metabolism, 15, 60 



Metamere, 87, 89 



