INDEX. 



771 



Page. 



Nndibrauchiata 0(54 



Obelia commissuralis 728, 327, ;i34, 393, 



407,411,425 



diaphana 727,327,334,429 



dicliotoma 728, 407, 411, 425 



divaricata 727 



flabellata 728, 390, 393, 497 



fusiformis 407,411,424 



gelatiaosa 728,391,393,482 



geniculala .. .727, 334, 393, 407, 411, 

 424, 487, 494, 495, 496 



lougissima 728 



polygena 727 



py rifonii is 727, 334, 390, 393 



species 476, 363, 376, 447, 454 



Oceauia lauguida 725, 454 



Ocean shores aud outer cold waters, 



fauna of 484 



Ocellated flounder 519 



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



534 



Ocypode pugilafor 545 



Odostomia bisuturalis . ..656, 307, 333, 383, 



393, 423 



dealbata 656 



exigua 656 



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

 impressa.-660, 656, 333, 418, 423 



iusculpta 656 



limnoidea 653 



producta 656, 333, 418, 423 



seminuda .657, 418, 423, 428, 435 

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



Oligocbreta 622 



Ommastrepbes Bartramii 635 



illecebrosa 634, 441, 453 



sagittatus 634 



Onchidoris pallida ., 685, 495 



Ouiscus 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, ftiuna of rocky shores.. 485 

 Open coast, fauna of sandy shores.. 489 



Ophelia simples 603, 319, 332, 410 



Ophidium marginatum 338 



Ophiocoma bellis 719 



neglecta 720 



Ophioderma olivaceum 719 



Ophi olepis scolopendrica 719 



Page. 



Ophiolepis tenuis 720 



Ophlopholis aculeata 719, 400, 496, 517 



bellis 719,400 



scolopendrica 719 



Ophiura bellis 719 



elegans 720 



oil vacea 719, 363, 366, 427, 429 



Ophiuroidea 719 



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



464, 486 



longicornis 556 



megalophthalma 556 



palustris 555, 468 



Orcy nus thuunina 516 



Orthagoriscus mola 578 



Orthopyxis caliculata . ..726, 334, 408, 411, 



424 



poterium 726 



Osteodesma hyalina 672 



Ostrea borealis 697 



Canadensis 697 



Islandica 696 



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

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



Virginica , 697 



Otion Cuvieri 580 



Outer coast, fauna of, on rocky 



shores 485 



Outer coast, fauna of, on sandy 



shores 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 



shores 487 



Outer coast, list of species of sandy 



and gravelly bottoms 504 



Outer coast, list of species of sandy 



shores 490 



Oyster 472, 355 



Oyster-beds in brackish waters, 



animals inhabiting 472 



Oyster-beds in brackish waters, list 



of species inhabiting 476 



Oyster-crab 367 



Pagurus Bernhardus 548 



longicarpus 549 



poUicaris 548 



