578 



INDEX 



Ligaments, 309 

 Linked genes, 512 

 Linnaeus, Carolus, 74 

 Lions, 435 

 Littoral zone, 469 

 Liver fluke, 146 

 Liver functions, 332 

 Lizards, 386 

 Lobster, 193 

 Loons, 418 

 Lumbricus, 169 

 Luna moth, 254 

 Lungs, 335 

 Lymph, 69, 343 



Macronucleus, 104 



Madreporite, 291 



Malaria, 96 



Mallophaga, 249 



Mammal, embryogenesis, 537 



Mammals, 426 



Mammary glands, 426 



Mange mites, 205 



Mantids, 244 



Marsupials, 430 



Mastigophora, 93 



Matter, 34 



May flies, 241 



Meal worms, 248 



Medusa, 124 



Meiosis, 33, 492 



Mendel, Gregor, 492 



Mesoderm, 137, 525 



Mesoglea, 122 



Metabolism, 21 



Metamorphosis, insect, 215 



Metazoa, 114 



Metridium, 129 



Micronucleus, 104 



Midges, 258 



Migration, bird, 413, 464 



mammals, 464 

 Millipede, 208 

 Mites, 204 

 Mitochondria, 20 

 Mitosis, 23 

 Mole, 432 

 Molecule, 36 

 Mollusk shells, 283 

 Mollusks, 271 



Molting, 184 



insects, 217 

 Monarch butterfly, 222, 255 

 Mongoose, 438 

 Monkeys, 452, 453 

 Monohybrid cross, 505 

 Monotremata, 428 

 Moose, 547 

 Morphology, 15 

 Mosquitoes, 4, 223, 258 

 Moss animals, 265 

 Moths, 254 



Motor nerves, 141, 174 

 Motor units of muscles, 316 

 Mud dauber, 261 

 Mud puppy, 380 

 Muscle, histology, 315 

 Muscle, origin, insertion, and action, 



315 

 Muscular system, 533 



ascaris, 157 



crayfish, 190 



earthworm, 173 



frog, 314 



man, 314 



planaria, 136 



starfish, 290 

 Mutation, 549 



Naiad, 217 



Natural sciences, 9 

 Natural selection, 12, 541 

 Neanthes, 176 

 Necator, 159 

 Nectar, 229 

 Nemathelminthes, 154 

 Nematocysts, 119 

 Nemertea, 268 

 Nephridia, 173, 275 

 Nerves, 321 

 Nervous system, 72 



ascaris, 157 



clam, 275 



crayfish, 190 



earthworm, 174 



embryology, 530 



frog, 321 ' 



hydra, 119 



man, 321 



planaria, 135, 141 

 Nest building of birds, 409 





