INDEX. 471 
Page. ‘ Page. 
Nudibranchiata...............---- 664 | Ophiolepis tenuis ...-.. Boao ede 720 
Obelia commissuralis - ...728, 327, 334, 393, | Ophiopholis aculeata- ....719, 400, 496, 517 
407, 411, 425 bellis...... 02222. .0-. 719, 400 
diaphana .....-... 727, 327, 334, 429 scolopendrica .-....... 719 
dichotoma ........ 728, 407, 411, 425 | Ophiura bellis .............222.... 719 
divaricata ..---.--- s dewewee 727 elegans .......-.--.--.... 720 
flabellata .....-.-- 728, 390, 393, 497 olivacea ..... 719, 363, 366, 427, 429 
fusiformis.....-------- 407, 411,424 | Ophiuroidea ......... Sime red dade 719 
gelatinosa .........728, 391, 393, 482 | Orchestia agilis .555, 314, 331, 336, 364, 462, 
geniculata ...727, 334, 393, 407, 411, 464, 486 
424, 487, 494, 495, 496 longicornis..........2... 556 
longissima -....-..--------- 728 megalophthalma ........ 556 
polygena ........-----+---+- 727 palustris .----.......... 555, 468 
pyriformis ....---. 727, 334, 390, 393 | Orcynus thunnina.............22.. 516 
species....---- 476, 363, 376, 447, 454 | Orthagoriscus mola .-.... 2... 2.22. 578 
Oceania languida ...---.--.------725, 454 | Orthopyxis caliculata . ..726, 334, 408, 411, 
Ocean shores and outer cold waters, 
fauna of ..-....----------+------ 484 
Ocellated flounder .......---.----- 519 
Ocypoda arenaria .- .545, 745, 336, 337, 364, 
534 
Ocypode pugilator ..--.. Sgisedarwesie 545 
Odostomia bisuturalis - ..656, 307, 333, 383, 
393, 423 
dealbata ......--------- 656 
exig“ua ..----.---------- 656 
fusca .656, 307, 333, 393, 423, 435 
impressa. .660, 656, 333, 418, 423 
jnsculpta ..---...--.---- 656 
limnoidea ....-....----- 653 
producta .--.- 656, 333, 418, 423 
seminnda, -657, 418, 423, 428, 435 
trifida 656, 307, 333, 393, 418, 423 
Oligocheta ....--. jae ¢ so cteebemese! 622 
Ommastrephes Bartramii....-..--. 635 
illecebrosa- . ..634, 441, 453 
sagittatus........-- 634 
Onchidoris pallida ...-..----. ---.665, 495 
OniSCUS se 5 vssee cece ce nxeecisis se8 ae 399 
Open coast, fauna of gravelly bot- 
TOMS ro esrescinsp wesw ear aaeaesce 500 
Open coast, fauna of muddy bot- 
POMS ss secon essen secu nttieteces 506 
Open coast, fauna of rocky bot- 
COMB s2:s2ciarciaeic ance seine Hees weiss 491 
Open coast, fauna of sandy bot- 
TOMS: cacauinmewae cadecasseccces 500 
Open coast, fauna of rocky shores... 485 
Open coast, fauna of sandy shores... 489 
Ophelia simplex -.-. -.-- 603, 319, 332, 410 
Ophidium marginatum .........--- 338 
Ophiocoma bellis. ........--..--... 719 
neglecta ..-.....-...... 720 
Ophioderma olivaceum............ 719 
Ophiolepis scolopendrica ..... wane. 719 
424 
poterium ...--.....-... 726 
Osteodesma hyalina............... 672 
Ostrea borealis...... ...-....2-2..- 697 
Canadensis ..-......... 2... 697 
Islandica .-........2. 0.222. 696 
Virginiana -. .697, 748, 310, 333, 374, 
378, 388, 393, 401, 410, 424, 435, 453 
Virgiilta.-<nse- chee e csccse cs 697 
Otion Cuvieri...-....222...2.2.2.. 580 
Outer coast, fauna of, on rocky 
SOLES vise ce aeamecs eoseea ices 485 
Outer coast, fauna of, on sandy 
BNOTOB ie vce teeie dee lereee ae hase 489 
Outer coast, fauna of, on gravelly 
DOTOMS .  eecisevecesioss sexees 500 
Outer coast, fauna of, on rocky 
bottoms ........-.-..22-2.-2-22. 491 
Outer coast, fauna of, on sandy 
bottoms ...... 2-22.22... eee. 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 
SHOES 65 osise wcivinicinssis a /eisiere ve seas 487 
Outer coast, list of species of sandy 
and gravelly bottoms ....-...... 504 
Outer coast, list of species of sandy 
SHONES) 2 n\n srdescecesc cc sec lees 490 
OSStOr sasisceiceseceecicieuemacecee 472, 355 
Oyster-beds in brackish waters,. 
animals inhabiting ....-.......- 
Oyster-beds in brackish waters, list 
of species inhabiting 76 
Oyster-craDs.co0.e cessesevsces eens 367 
.Pagurus Bernhardus .......-...-.- 548 
longicarpus ....-....--... 549 
pollicaris ..... 
