INDEX 
NS 
aS 
vo} 
Oreosoma, 683 
Orestias, 616 
Orodus, 449 
Or thagori iscus, 727, 1538, 354; spinal cord, 
One| O} mola, 602, 727, 348, 357 
Ortho-enteric, 102, 108 
Osmeroides, 547 
Osmerus, 566, 565: O. 
gonoduets, 405, 411 
Osphromenidae, 669, 654 ; 
organ, 293 
Osphromenus, 669, 293 ; O. olfax, 669 
Osphyolax, G34 
Ostariophysi, 573 f., 
Osteochilus, 582 
Osteogeniosus, S88, 593 
Osteoglossidae, 555, 544, 294, 405 ; 
gills, 290 ; distribution, 557 
Osteoglossum, 557 ; O. bicirrhosum, 556 
Osteolepida, 477 f. 
Osteolepidae, 477 
Osteolepis, 477 ; O. macrolepidota, 477 
Osteostraci, 427 f., 149 
eperlanus, 568 ; 
labyrinthiform 
306, 389 
larval 
Ostracion, 724, 152, 361; colours, 165, 
174; scales, 191;. O. ornatus, 165 ; 
O. quadricornis, 725; O. trigonus, 
362 
Ostraciontidae, 724, 721 
Ostracodermi, 522 f., 149, 721 
Otocinelus, 595 : 
Otolithus, 663; air-bladder, 304; 0. 
regalis, 361 
Ovidueal gland (shell-gland), 400, 407 
Ovipositor, 408 
Oxuderces, 690 
Oxydoras, 588, 359 
Oxygnathus, 487 
Oxylebius, GIG 
Oxymetopon, 689 
Pachycormidae, 501 
Pachycormus, 501 
Pachylebias, 616 : 
Pachymetopon, 665 
Pachyrhizodontidae, 569 
Pachyrhizodus, 569 
Pachystomias, 571; P. microdon, photo- 
phores, 178, 179, 180 
Pachyula, 588 
Paddle-Fish, 492; = Polyodon, q.v. 
Pagellus, 665 ; P. centrodontus, 346 
Pagrus, 665 ; P. auratus, 665 
Palaeolycus, GO9 
Palaeomylus, 468 
Palaeoniscidae, 486, 485; range in time, 
487 
Palaeoniscus, 486, 487 ; P. macropomus, 
486 
Palaeorhynchidae, 680 
Palaeorhynchus, 680 
Palaeoscyllium, 447 
Palaeospinax, 445 ; vertebral column, 197 
Palaeospondylidae, 527 f., 149 
Palaeospondylus gurni, 521, 522 
Palimphyes, 678 
Pallas, 112 
Pancreas, 273 
Pangasius, 588, 305, 359 ; 
359 n. 
Pantodon buchholzi, 558, 559 
Pantodontidae, 548, 544 
Papillae, adhering, 61 
Paracentroscyllium, 455 
Paradiplomystes, 588 
Paragoniates, 575 
Parailia, 588 
Paralepis, 611 
Paralichthys, 687 
Paraliparis, 698 
Paraluteres, 724 
Paranthias, 659 
Parapegasus, 636 
Parapelecus, 582 
Parapercis, 705 
Paraphago, 576 
Paraphractura, 588, 589 
Parapriacanthus, 657 
Parapsettus, 668 
Parascopelus, 611 
Parasitism, of Rhodeus, 584, 
Stegophilus, 594 
Paratilapia, 671 
Paratrachichthys, 656, 655 
Paratrygon, 465 
Parental care, 415, 416, 500, 501 
Parexus, 441 
Parietal budding, 82 
Parietal eye, 395 f., 396 
Pariolius, 588 
Parker, T. we .. 14 n. 
Parker, W.N., 705 n. 
Parodon, 576 
Paropsis, 677 
Parrot-Wrasses, 674 
Pataecus, 709 
Pearl Oysters, Fierasfer in, 625 
Pectoral fins, 157, 242, 243, 244 
Pectoral girdle, 239, 240 
Pediculati, 777 1., 651, 306 
Pegasidae, 635, 626, 628 
Pegasus, G36 
Pegea, 108; P. 
108 
Pelagic ova, 408 
Pelargorhynchus, 623 
Pelecus, 582 
Pellegrin, 671 n., 724 n. 
Pellona, 563, 563 
Pellonula, 563 
Pelonaia, 74; branchial sac, 74; P. cor- 
rugata, 76 
Pelor, 695 
Peloria, 685 
Pelvic fins, 158, 245 f., 246 
P. micronema, 
416; of 
scutigera - confoederata, 
