INDEX. 



711 



Niglitliawk, Snt 



Noctiluca miliaris, 33 



Noises produced by fisbes, 443, 443 



Notacanthus, 446 



Notochord of ascidians, 200 



Notommata, 177 



Nototrema marsupiatura, 4S5 



Nudibrancli molluscs, 265 



Xumerius longirostris, 545 



Nummulites, 25 



Nurse of trematode worms, 149 



Nyctea nivea, 549 



OCULINA, 80 

 Octacnemus bytliius, 203 

 Octopod cephalopoda, 280 

 Octopus Bairdii, 283 



punctatus, 283 

 Odontopliore, 278 

 OdontornitUes, 537, 557 

 (Ecodoma, 383 

 OligocLaeta, 236 

 Oncbidium, 257 

 OdIscus murarius, 307 

 Operculum of gastropoda, 201 

 Ophidia, 490, 517 

 Opliiocoma vivipara, 110 

 Opliiopliolis bellis, 110 

 Opliiuridea, 109, 110 

 Opistliodelpliys ovifera, 485 

 Opisthomi, 440 

 Opossum, 575 

 Orang, 023 

 Orca gladiator, 595 

 Oreortyx pictus, 540 

 Organisms, 0, 23 

 Organs,comi3aratiye anatomy of,031 



of circulation, 035 



of digestion, 031 



of respiration, 637 



of sense, 040 



of smell, 643 



nature of, 4, 0, 8, 9 

 Origin of species, 671 

 Ornitbodelpliin, 571, 038 

 Ornitliosauria, 510 



Oroliippus, G03 

 Ortliagoriscus oblongus, 403 

 Orthoptera, 308, 386 

 Oscines, 553, 553 

 Oscula of sponges, 43 

 Osmerus eperlanus, 453 



mordax, 453 

 Osprey, 548 

 Ostracoda, 299 

 Ostricli, 539 

 Otocyst, 270, 041 



of clam, 245 



of worms, 143 

 Ova, winter, of planariaus, 145 



of polyzoa, 187 



of Rotatoria, 178 

 Ovibos moscliatus, 010 



priscus, 010 

 Ovis argali, 010 



aries, 010 



montana, 010 

 Owl, ,548 

 Ox, 013 



Oxyuris vermicularis, 107 

 Oyster, pearl, 253 



Paddle pish, 427 

 Palfeocarida, 393, 315, 330 

 Palaeontology, 16 

 Palamedea cornuta, 540 

 Palapteryx, 538 

 Palechinida, 133, 13G 

 Palisade worm, 108 

 Paludicella, 183 

 Pandion lialiaetus, 548 

 Pangolin, 580 

 Panopsea arctica, 250 

 Paragorgia arborea, 80 

 Paramecium caudatum, 35 

 Parr, 453 

 Parroquef, 550 

 Parrot, 550 

 Parthenogenesis, .54, 653 



in ascidians, 213 

 Partridge, 546 

 Passeres, .551 



