416 



INDEX. 



Laboratory materials, 409 



Laboratory method, 25-35 



Lamellibranchs, 216 



Lamprey, 276 



Larva, 106, 262 (see Develop- 

 ment) 



Leeches, 201 



Lemurs, 355 



Lepidoptera, 247 



Liver-fluke, 187, 191 



Living and non-living, 36 



Lobes of brain, 288, 363, 364 



Lobster, larva, 236 

 adult, 237 



Locomotion, 49, 56 (see also 

 Motion) 



Locust, 55, 64 



Loons, 327 



Lungs, 8 1 (see also Respiration) 



Lung-fish, 292 



Males, 100 



Man, 356, 360 



Man's relation to nature, 369 



Mammals, 18, 19, 343 



Mantle, 215 



Mating, 100, 129 



Marsupials, 343, 349 



Materials for laboratory, 409 



Mayflies, 251 



Medulla oblongata, 288 



Medusae, 178 



Mendel's laws, 393 



Mental life of animals, 345, 365 



Mental processes in laboratory 



work, 33-35 

 Mesoderm, 113, 114 

 Metabolism, 77 

 Metamorphosis, 105, 262, 299, 



300 (see Development). 

 Metazoa, 19, 22 

 Mice, 351 

 Mimicry, 143 

 Mites, 252 

 Moles, 353 



Mollusks, 19, 21, 215 

 Monkeys, 356 

 Monotremes, 343, 349 

 Morphology, 4, 113-123 



Morula, 104, 108 



Mosquitoes, 160, 244, 260 



Moths, 247 



Motion, 72, 89 (see Locomotion) 



Moulting, 262 



Mouth-parts, cock roach, 257 



Mosquito, 258 

 Muscles, 89, 117, 121, 282 

 Myriapods, 255 



Natural selection, 150, 394 



Nautilus, 229 



Necturus, 302 



Negro, 363, 371 



Nervous system and function, 



90, 91, Il8, 121, 212, 220, 288, 



324, 345. 363, 364 (see Irri- 

 tability) 



Notochord, 274 



Nucleus, 38, 39 



Nutrition, 77 (see Food, Diges- 

 tion, etc.) 



Octopus, 230 



Opossum, 351 



Optic lobes, 288 



Olfactory lobes, 288 



Orang-outang, 361, 362 



Organic and inorganic, 3, 32, 37 



Organization, 38 



Organs, 76, 77, 119 



Orioles, 337 



Orthoptera, 243 



Ostrich, 327, 328 



Ova, 89, 100, 101 



Ovary, 89 



Owls, 333, 335 



Oxidation, 78 



Parallelism of development, 388 

 Paramecium, i 56, 158 

 Parasitism and parasites, 139, 



I45i 154, 160, 187-193, 253 

 Parthenogenesis, 102 

 Partridges, 333 



