INDEX 



443 



Kidney, human, 390. 

 Knots, cause of, 139. 



Lacteals, 361, 362, 377. 

 Larval stages, defined, 200. 

 Larynx, 354. 



Lateral line, function of, 276. 

 Leaf, cell structure of, 120 ; 



functions of, 128 ; 



respiration in, 128 ; 



structure of, 119. 

 Leaves, as holdfasts, 113; 



arrangement of, 118 ; 



as insect traps, 130, 131 ; 



climbing, 130 ; 



modified, 129, 130, 131 ; 



reduced, 130. 

 Lens of eye, 410. 

 Lenticels, use of, 102. 

 Lepidoptera, 247. 

 Leucocytes, alcohol upon, 423. 

 Levers, classes of, 326 ; 



in body, 324. 

 Lichens, 187. 

 Life history, of beetle, 242 ; 



of butterfly, 237 ; 



of Cecropia, 239 ; 



of cicada, 243 ; 



of fly, 240, 241 ; 



of frog, 288, 289, 290 ; 



of honeybee, 254 ; 



of locust, 236 ; 



of shrimp, 227. 

 Light, effect of, upon plants, 115, 



116, 117. 

 Lily, leaves of, 118. 

 Liver, 352, 360. 



Li^-ing matter, composition of, 23. 

 Living things, environment of, 17 ; 



functions and composition of, 26. 

 Lizards, 294. 



Lobster, North American, 226. 

 Locomotion, in crayfish, 222 ; 



in frogs, 286 ; 



in snakes, 295 ; 



of earthworm, 214. 

 Locust, 234 ; 



relatives of, 236. 

 Locule, 37. 

 Lumber, transportation of, 137, 138. 



Lymph, function of, 375. 

 Lymph vessels, 376. 



Macronucleus, 192. 

 Malacostraca, 247. 

 Malaria and the mosquito, 197, 258. 

 Mammal, circulation in, 372 ; 



man a, 319. 

 Mammals, 311 ; 



classification of, 317 ; 



hoofed 315. 

 Man, brain of, 401 ; 



circulation in, 370 ; 



evolution of, 319 ; 



place of, in nature, 319 ; 



races of, 320 ; 



stomach of, 353, 357. 

 Mantis, 251. 

 Mantle cavity, 267. 

 Maxillipeds, 224. 

 May flies, 245. 

 Medulla, 401. 

 Medusa, 207, 208. 

 Membrane, tympanic, 407. 

 Mesoderm, 200. 

 Mesophytes, 162. 

 Metamorphosis, defined, 247. 

 Metazoa, 199. 

 Micronucleus, 192. 

 Micropyle, of bean, 65 ; 



of ovule, 36. 

 Mildews, 174. 

 Milk, an emulsion, 359 ; 



and typhoid, 434 ; 



bacteria in, 180 ; 



necessity of pure, 432, 434. 

 Milkweed, dispersal in, 80. 

 Mimicry in insects, 251, 252. 

 Mineral matter, in living things, 22. 

 Molars, 355. 

 MoUusks, classification of, 273 ; 



habitat of, 271 ; 



some common, 268, 269, 270. 

 Molting, 228. 



Monarch butterfly, 237, 261. 

 Monocotyledons 73. 

 Mosquito and malaria, 196; 



and yellow fever, 259 ; 



kinds of, 197, 258 ; 



malarial, 197, 259, 259. 



