INDEX. 



771 



Page. 



Nudibranchiata 664 



Obelia corninissuralis 728, 327, 334, 393, 



407, 411, 425 



diaphana 727, 327, 334, 429 



dichotoma 728, 407, 411, 425 



divaricata 727 



flabellata 728, 390, 393, 497 



fusiforniis 407,411,424 



gelatinosa 728, 391, 393, 482 



geniculate .. .727, 334, 393, 407, 411, 

 424, 487, 494, 495, 496 



longissima 728 



polygena 727 



pyriformis 727, 334, 390, 393 



species 476, 363, 376, 447, 454 



Oceania languida 725, 454 



Ocean sbores and outer cold waters, 



fauna of 484 



Ocellated flounder 519 



Ocypoda arenaria .. .545, 745, 336, 337, 364, 



534 



Ocypode pugilator 545 



Odostoniia bisuturalis . ..656, 307, 333, 383, 



393, 423 



dealbata 656 



exigua 656 



fusca .656, 307, 333, 393, 423, 435 

 irnpressa..660, 656, 333, 418, 423 



insculpta 656 



limnoidea 653 



producta 656, 333, 418, 423 



seminuda .657, 418, 423, 428, 435 

 trifida 656, 307, 333, 393, 418, 423 



Oligocbpeta 622 



Ommastrepbes Bartrarnii 635 



illecebrosa 634, 441, 453 



sagittatus 634 



Oncbidoris pallida 665, 495 



Ooiscus 399 



Open coast, fauna of gravelly bot- 

 toms 500 



Open coast, fauna of muddy bot- 

 toms 506 



Open coast, fauna of rocky bot- 

 toms 491 



Open coast, fauna of sandy bot- 

 toms 500 



Open coast, fauna of rocky sbores.. 485 

 Open coast, fauna of sandy sbores.. 489 



Ophelia simples 603, 319, 332, 410 



Opbidium marginatum 338 



Opbiocoma bellis .„ 719 



neglecta 720 



Opbioderma olivaceum 719 



Opbiolepis scolopendrica 719 



Page. 



Opbiolepis tenuis 720 



Opbiopbolis aculeata 719, 400, 496, 517 



bellis 719,400 



scolopendrica 719 



Opbiura bellis 719 



elegans 720 



•oli^-aced 719 ; 363, 366, 427, 429 



Opbiui-oidea 719 



Orcbestia agilis .555, 314, 331, 336, 364, 462, 



464, 486 



longicornis 556 



megalopbtbalma 556 



palustris .' .555, 468 



Orcy nus tbunnina 516 ' 



Ortbagoriscus mola 578 



Ortbopysis caliculata . ..726, 334, 408, 411, 



424 



poterium... 726 



Osteodesma byalina 672 



Ostrea borealis 697 



Canadensis 697 



Islandica 696 



Virginiana . . .697, 748, 310, 333, 374, 

 378, 388, 393, 401, 410, 424, 435, 453 



Yirginica 697 



Otion Cuvieri 580 



Outer coast, fauna of, on rocky 



shores 485 



Outer coast, fauna of, on sandy 



sbores 489 



Outer coast, fauna of, on gravelly 



bottoms 500 



Outer coast, fauna of, on rocky 



bottoms 491 



Outer coast, fauna of, on sandy 



bottoms 500 



Outer coast, list of species of 



muddy bottoms 511 



Outer coast, list of species of 



rocky bottoms 498 



Outer coast, list of species of rocky 



sbores 487 



Outer coast, list of species of sandy 



and gravelly bottoms 504 



Outer coast, list of species of sandy 



sbores 490 



Oyster 472,355 



Oyster-beds in brackisb waters, 



animals inhabiting 472 



Oyster-beds in brackish waters, list 



of species inhabiting 476 



Oyster-crab 367 



Pagurus Bernhardus 548 



lougicarpus 549 



pollicaris 548 



