Index, 



551 



Mya arenaria, 315 

 Mycetes, 533 

 Myelenoephalon, 330 

 Mygale, 283 

 Mylodon, 525 

 Myodes lemmus, 530 

 Myogale, 500 



„ inosohata, 500 



„ pyraenica, 500 



Myopotamus ooypu, 530 

 Myoxidse, 529 

 Myoxus avellanarius, 530 



„ dryas, 530 

 glis, 530 



„ nitela, 530 

 Myriapoda, 227 

 Myrmecobius, 497 

 Myrmecophaga, 526 



„ didaotyla, 



526 

 „ jubata, 526 



Myrmeoophilous Insects, 



270 

 Myrmeleon, 261 

 Mysidacea, 210, 211 

 Mysidse, 211 

 Mysis, 212 

 Mysis-stage, 222 

 Mystaooceti, 523 

 Mytilus eduHs, 314 

 Myxine, 383 



„ glutinosa, 383 



Waidse, 174 



Nails, 470 



STais, 174 



Naja tripudians, 424 



Narwhal, 525 



Nasal, 362 



„ gland, 443 

 Nasua, 516 

 Natantia, 222 

 Natatores, 456 

 Natioa, 302 

 Native Cats, 497 

 Natural selection, 57 

 Nauplius, 192 



eye, 190 

 Nautilus, 323 

 NaTiculare, 479 

 Nearctic region, 74 

 Neb, 451 

 Nebalia, 207 

 Neck, 324 

 Necrophorus, 264 

 Nectocalyoes, 108 

 Negro, 536 



Nemathelminthia, 83, 158 

 Nematoda, 158 

 Nematooyst, 100 

 Nemertinea, 153 

 Nemocera, 276 

 Neophron percnoptems,461 

 Neotropical region, 74 

 Nepa, 160 

 NepheKs, 176 

 Nephridia, 167 

 Nephroharpages, 461 



Nereidae, 173 



Nereis, 173 



Neritina, 302 



Nerophis, 391 



Nerve fibres, 13 

 „ ring, 102 



Nervous system, 17 

 „ central, 17 

 „ peripheral, 17 

 „ sympathetic, 18 

 „ tissues, 7 



Neural spine, 326 



Neurilemma, 13 



Neuroglia, 331 



Neuroptera, 252, 260 



Neuropodium, 169 



Newts, 404 



„ Large Water, 404 

 „ Palmated-smooth, 



404 

 „ SmaU, 404 



Nictitating membrane, 336 



Nidamental glands, 321 



Nightingale, 462 



Nightjar, 464 



Nine-eyes, 382 



Niphargus puteanus, 219 



Nits, 260 



Noctuids, 275 



Nocturnal animals, 71 



Non-ruminantia, 505 



Notochord, 324 



Notonecta, 160 



Notopodimn, 169 



Notoryctes typhlops, 499 



Nubian "Wild Cat, 517 



Nucifraga caryocataotes, 

 463 



Nucleolus, 3, 85 



Nucleus, 3, 85, 96 



„ pulposus, 471 



Nudibranchiata, 303 



Numenius arcuata, 460 



Numida meleagris, 456 



Nummulites, 89 



Nutcracker, 463 



Nuthatch, 464 



Nutritive polyps, 104, 107 



Nut "Weevil, 244 



Nyotale funerea, 461 



Nyctea nivea, 461 



Nyctharpages, 461 



Nycticorax griseus, 459 



Nymphon, 286 



Occipital, 362 



„ condyles, 394 

 Ocelli, 187 

 Octactinia, 113 

 Octopoda, 323 

 Octopods, 323 

 Octopus vulgaris, 323 

 Ocular plates, 136 

 Odobaenus rosmarus, 519 

 Odontoblasts, 340 

 Odontoceti, 524 

 Odontoid, 409 

 Odontornithes, 453 



(Esophagus, 23 

 (Estridae, 277 

 (Estrus, 277 

 Oil-beetle, 266 



„ globules, 10, 85 

 Olecranon, 328 

 Olfactory lobes, 330 

 „ organs, 18 

 Omasum, 507 

 Omentum, 488 

 Oniscidae, 215 

 Oniscus, 215 

 Ontogeny, 40 

 Onychophora, 177 

 Ocecium, 180 

 Operculum, 179, 197. 204, 



295, 373, 374 

 Ophidia, 422 

 Ophidiidse, 389 

 Ophiura, 134 

 Ophiuridse, 133 

 Opisthobranchiata, 301, 303 

 Opisthoglypha, 424 

 Opisthotic, 362 

 Opossums, 497 

 Optic chiasma, 332 



„ lobes, 331 



„ organs, 20 



„ thalami, 331 

 Oral disc, 112 



„ tentacles, 109 

 Orang-utang, 534 

 Orbit, 333 



Orbitosphenoid, 362 

 Orca gladiator, 524 

 Order, 55 



Organ-pipe coral, 114 

 Organs, 13 



„ of Bojanus, 312 

 Oriental region, 74 

 Oriolus galbula, 462 

 Ornithorynchus, 496 

 Orthagoriscus, 391 

 Orthoptera, 252 

 Orycteropus, 527 

 Oryotes, 244 



„ nasicorrds, 265 

 Oscines, 461 

 Osculum, 119 

 Os penis, 493 

 Osphradia, 296 

 Osprey, 433, 460 

 Os sepiae, 323 

 Ossicles, 129, 133 

 Ossifications, 325 

 Ostracion, 391 

 Ostraooda, 199 

 Ostrea edulis, 314 

 Ostrich, 453, 454 

 Otariidse, 519 

 Otidai, 459 

 Otis tarda, 459 

 „ tetrax, 459 

 Otoooris alpestris, 464 

 Otooyon caffer, 516 

 Otocysts, 19 

 Otoliths, 20 

 Otters, 516 



