418 



PRINCIPLES OF ANIMAL BIOLOGY 



Lab5^rinth, membranous, homology of, 



349, 350 

 Lacteals, 132 

 Lakes, 296-299 



filling of, 293 



organisms of, 298-299 



vegetation in, 284, 297 

 Lamarck, Jean Baptiste, 15, 16, 17, 18 



taxonomy by, 246 

 Lamprey, 276 

 Land bridges, 323 

 Larva, 191, 215, 216 



defined, 166 

 Law of priority, 249 

 Leech, 270 



I-eeuwenhoek, Anton van, 10, 11 

 Leg, analogy of, 251 



of insect compared with that of man, 89 

 Leiolopisma, discontinuity of range of, 



311 

 Lemming, migration of, 319 

 Lepas, 352 



Leptinotarsa, distribution of, 317 

 Life, defined, 53 

 Life history, of parasites, 291 

 Light, affecting color, 285 



ecological relations of, 283-285 



effect of, on reproduction, 284 



modifying structure, 284 



reactions to, 285 



relation of, to photosynthesis, 283 

 Limb skeletons, 92, 93 

 Linear colony, 67 

 Linkage, autosomal, 236, 237 



sex, 234, 236, 236 

 Linnaean classification, 247, 248 

 Linnaeus, Carolus, 12, 16, 20 



taxonomy by, 245, 246 

 Lipids, 40, 41 



storage of, 107 

 Liver, 101, 103, 105 



in embryo, 210, 212 



excretion by, 138 

 Living matter defined, 53 

 Lizard, 277 

 Lungs, 115 



analogy of, 251, 2E2 



in embryo, 211, 212 



Lyell, Sir Charles, influence of, on Dar- 

 win, 360 

 Lymph, 130, 131 

 Lymph capillaries, 131, 132 

 Lymph nodes, 132 

 Lymph system, 122, 125, 130, 131, 132 



M 



Macronucleus, 162, 163 



Madagascar, animal distribution on, 322 



isolation of, 323 

 Major realms of distribution, 323, 324 

 MaJpighi, Marcello, 10, 15 

 Malthus, Thomas Robert, influence of, on 



Darwin and Wallace, 360, 361 

 Mammalia. 278, 280 

 Mammalogist, 257 

 Mammals, digestive system of, 101 



evolution of, 335 



origin of, 321, 322 



primitiveness of, in southern conti- 

 nents, 322 

 Mammary glands, 155 

 Mammoth, fossil, 326 

 Man, fossil, 344-348 

 Marine habitats, 300-303 



geographic areas in, 303, 304 



on ocean bottom, 301, 302 

 clam on, 302 



relation of, to depth, 301 

 Marsupial frog, egg pouch of, 188 

 Mastigophora, 260 

 Mastodon, 336, 339 



tooth of, 337 

 Material requirements, 109 

 Matrix, of sustentative tissue, 81 

 Matter, 30 



Maturation, of germ cells, 193-198 

 Medulla oblongata, 152 

 Medullary sheath, 143 

 Medusa, 172, 173, 174, 262, 263 

 Meiosis, 195 

 Mendel, Gregor, 18, 19, 223, 224 



law of, 237-239 

 Mendolian heredity, 237-239 

 Meridional cleavage, 201 

 Merychippus, 341 



feet of, 341 



skull of, 342 

 Mesenchyme, 82, 83 



