698 



INDEX 



Noctiluca, 204, 400, 472, 538, 540, 547, 



560, 563, 564, 565 

 N. miliaris (= scintillans) 32, 568, 570, 



612, 616 

 No me us, 588 

 noradrenaline, 109 

 Notodelphys, 590 

 Notomastus, 232, 457 

 Nucella, 235, 293, 481, 647, 664 

 N. lapillus, 487, 593, 633 

 nucleic acids, 294 

 Nucula, 215 

 nudibranchs — 



feeding, 239 



nematocysts, 375 

 nuptial coloration, 494, 527 

 nutrition, 202, 618 

 Nyctiphanes, 202, 575 

 N. couchi, 549 



ocean, depth and extent, 1 



ocelli, 308 



octopamine, 255 



Octopus, 93, 100, 110, 111, 120, 165, 255, 



264, 297, 312, 314, 443, 584 

 O. bi macula t us, 474 

 O. hongkongensis, 423 

 O. macropus, 191 



O. vulgaris, 101, 152, 180, 187, 285, 286 

 Ocypode, 47, 149, 405, 406 

 O. albicans, 48 

 Odax, 480 

 Odobenus, 247 



Odontosyllis, 297, 541, 561, 578 

 Odostomia eulimoides, 598 

 oesophagus, 256 

 Oikopleura, 222 

 O. albicans, 222 

 olfactory organs, fish, 352 

 Oligognathus bonelliae, 596 

 ommatidia, 309, 311 

 ommochromes, 509 

 Oncaea, 542 



Onchidella, 149, 320, 650 

 O. celtica, 292, 293 

 Oncorhynchus nerka, 475, 508 

 O. tschawytscha, 91, 290 

 Oniscus, 149 

 O. asellus, 293 

 Onos, 353 

 O. must el us, 357 

 Onuphis, 657 



opelet anemone. See Anemonia sulcata 

 Ophelia, 232, 457 

 Ophidiaster, 474 

 Ophiocoma, 241 

 O. elongatus. 31. 88, 179 

 Ophiopsila, 233, 552, 575 

 Ophiothrix, 552 

 O. angulata, 633 

 Ophiura, 241 



Ophiura (= Ophioderma) brevispina, 459 

 0. texturata, 153 



ophiuroids — 



feeding, 233, 241 



luminescence, 552 

 Opsanus, 155, 182, 406, 407 

 O. tau, 142, 176, 179. 186,407 

 Orbitolites, 611, 618, 636 

 O. marginatis, 632 

 Orca, 247 

 Orchestia, 286, 293 

 organic tubes, 655 

 organs of Cuvier, 664 

 organs of Pesta, 550 

 orientation reflexes, 320, 335 

 ornithine cycle, 294 

 orthonectids, 594 

 osculum, 205, 376 

 osmoregulation, 38 



osmotic adjustment and regulation, 28 

 ossicles, 631 



Ostraciidae, feeding, 236 

 ostracods — 



feeding, 226 



luminescence, 541 

 Ostrea, 100, 110, 112, 120, 215, 216, 217, 

 391, 598, 648 



See also Crassostrea 

 O. circumpicta, 383 

 O. edulis, 16, 101, 218, 383 

 O. virginica. See Crassostrea 

 otoliths, 635 

 oval nucleus, 398 

 Ovalipes ocellatus, 1 80 

 ovoverdin, 474 

 Owenia, 476 

 O. fusiformis, 457 

 oxygen — 



dissociation curves, 175, 176, 182, 185, 

 188, 189, 190 



sea water, 13, 618 

 oxygen capacity, blood, 175, 180, 186, 



187 

 oxygen consumption, 151, 152, 187 



and tension, 162 

 oxygen utilization, 165, 168 

 oyster, 16 



digestion, 259 



larvae, 223 



symbiosis, 620 



See also Crassostrea, Ostrea 

 oyster catcher. See Haematopus 

 oyster drill. See Urosalpinx 



Pachygrapsus, 49 



P. crassipes, 46, 47 



Pachyptila, 230 



P.forsteri, 231 



Paguropsis typica, 587 



Pagurus, 515, 518, 604 



P. pollicaris, 124 



Palaemon, 239, 322, 347, 421, 435, 438 



506, 507, 513, 515, 517, 601, 623, 644, 



645 

 P. adspersus, 513 



