5 o6 



INDEX 



MOLLCSCA 



nervous system of 331 



number of 433 



respiration in 820, 327 



shells of 341,342, 



stomach of 282 



teeth of 346 



see Clam, Cuttlefish, Snail, Squid. 



Molluscoida 82 



Molting 337,422 



Monkey . . . 193, 256, 374, 381, 387, 398 



thumbless 217 



Monotremata 179, 180 



Morphology 12, 14 



Mosquito 113, 250, 78, 369 



Moth .... 113, 407, 429, 71, 74, 241 

 see Lepidoptera. * 



Mother Carey's chicken 165 



Mother-of-pearl 341 



Motion 242,363 



Mouse 191 



Mouths of animals 256 



Mucous membrane 255 



Mulberry mass 410 



Mullet 149 



Murex 129 



Musca 113, 324 



see Diptera, Fly, House fly. 



Muscle 364, 208, 327, 328 



Muscular fiber .... 2O9, 318, 319 



Muscular tissue 236 



Mushroom coral 78, 29 



Mussel 125, 126, 127, 341, 85 



Mya . . . . 127 



Mycetozoa . 59, 3 



Myenia 66 



Myriapoda 106,392 



see Centipede. 



Myrmecophaga jubata 168 



Mytilus pellucidus 85 



Myxine 144, 268 



NAILS 344 



Narwhal 270 



Nassa reticulata 106 



Natural selection 439, 455 



Nauplius of Entomostracan .... 373 

 Nautilus . . 134-137, 282, 341, 109, HO 



Necrophorus vespillo 77 



Necturus 152, 129 



Nemathelminthes 82, 84 



Nematocyst 68 



Nereis 95,97,253,279,215 



Nerve, 238, 239, 376, 888, 210, 329, 346 

 Nervous system . 139, 376, 386, 33O-333 



Nervous tissue 237 



Neurapophyses 349 



Neurilemma 239, 210, 211 



Neurology 14 



Neuron . . 211 



Neuroptera 110 



see Dragon fly. 



Neuroskeleton 352 



Newt, metamorphosis of 370 



Noctiluca 60 



Notochord 411, 117, 363 



Notonecta 112, 66 



Nucleolus 228, 198 



Nucleus 228, 198 



Nudibranch 130 



Nutrition 242, 244 



Nymph 77 



OCEANITE8 165 



Ocelli 106, 891, 352 



Octopus 135 



Odontoid process 354 



Odontophore 129 



(Estrus 113 



Olfactory lobes .... 382, 336-338 



Olfactory nerves 388, 346 



Oligochaeta . 97 



Olive shell 129 



Oniscus 104 



Onycophora 104 



Operculum, 128, 147, 169, 321, 342, 88, 3O9 

 Ophidia 155 



see Snake. 



Ophiocoma russei 47 



Ophiura . 91, 45, 47 



Ophiuroidea 90 



Opisthobranchia 129 



Opisthocselous 477 



Opossum 180, 167 



Optic lobes 382, 394, 336-338 



Orang-outang, 196, 340, 188, 190, 191 



Orchelimum 110 



Order 51 



Organ 240 



Organization 227 



Organ-pipe coral 27 



Origin, of life 219 



of species 450 



Oriole 176,429 



Ornithorhynchus ... 179, 267, 166 



Orthoceras 134 



Orthognathous 470 



Orthoptera 109 



see Grasshopper. 



Orycteropus 181 



Oscines . .- 176 



Osculum 65, 68, 13, 15 



Os innominatum 355 



Osseous tissue 234 



see Bone. 



Ossification 415 



Ostracoda 101 



Ostrea 127 



see Oyster. 

 Ostrich 162, 287, 375, 14O 



