INDEX 



453 



Oro-nasal grooves, 182 



Osmeridae, 377 



Osmerus, see Smelt 



Osphronemus, see Gourami 



Ossicles, 193 



Ostariophysi, Weberian mechanism, 

 193 f. ; origin and distribution, 

 269 f., 273, 276, 377; systematic 

 position, 377 



Osteoglossid, 272; lateral line scales, 

 199; distribution, 270, 272; nest, 

 305; external gills, 332 



Osteoglossoidea, 377 



Osteoglossum bicirrhosum, 272 



Osteolepidae, 356 



Osteolepis, 356 



Ostracion, see Trunk-fish 



Ostraciontidae, 379 



Ostracoderm, 344 



Otolith, 191, 192 



Otter, fishing with, 389 



Otter trawl, 390, 391 f. 



Ouananiche, 266 



Oval, 174 



Ovary, 173, 279, 281 



Over-fishing, 402 f. 



Oviduct, 279, 281, 318, 325 



Oviparous fishes, 318 



Ovisac, 327 



Ovum, 317; see also egg 



Oxygen, consumption of, 33; in air- 

 bladder, 174 



Oxyluciferin, 152 



Pachycormidae, 361 



Pacific Herring, distribution, 261 



Pacific Salmon, 266, 286, 369; head 



of male, 282; spawning, 286 f. ; 



canning, 399 

 Pacific Trout, 266, 369 

 Paddle-fish, 110; mouth, 109; scales, 



89 

 Pain, 203 



Paired fins, 56, 58, 75 f., 351 

 Pairing, 294 f. 



Palaearctic region, 270, 276 f. 

 Palaeoniscidae, 88, 354, 360; scales, 



88 

 Palaeontology, 341 

 Paleopterygii, 353, 376 

 Palaeospondylus, 348 

 Palaeozoic era, 342 

 Palatability of fishes, 167 f. 



Palate, 108 

 Palatine bone, 108 

 Palatine teeth, 128 

 Pampano, 94; scutes, 94 

 Panama Canal, 256 

 Pancreas, 1 70 

 Pantodon, see Chisel-jaw 

 Parachordal, 161 

 Paracirr kites, see Cirrhitid 

 Paradise-fish, respiration, 46; breed- 

 ing, 308 

 Paralichthys, colour changes, 221; 



see American Flounder 

 Paraliparis, 231 

 Parasites, 416 f. 

 Parasitic males, 250 f., 315 f. 

 Parasitism, 249 f. 

 Parental care, 304 f. 

 Parr, 102, 222, 326, 329 

 Parrot-fish, 101; lateral line, 100; 



jaws, 131; teeth, food, 137; 



poisonous flesh, 145; feeding, 195 

 Parrot Wrasse, see Parrot-fish 

 Pastinaca, 140 

 Patagonian fishes, 273 

 Peal, 370 

 Pearl-fish, tail, 75 

 Pearls, from scales of Bleak, 401 

 Pectoral fin, 14, 27 f., 58, 75 f. 

 Pediculate, see Angler-fish 

 Pediculati, 379 

 Pegasidae, see Dragon-fish 

 Pelagic eggs, 321 f., 330 

 Pelagic fishes, 254 

 Pelvic fin, 14, 27, 58; of South 



American Lung-fish, 301 

 Perca, see Perch 

 Perch, gill-rakers, 39; caudal fin, 



74; pelvic fin, 80; scales, go; 



lateral hne, 100, 199; teeth, 128; 



internal organs, 168; caught with 



own eye, 203; distribution, 269; 



eggs, 323; systematic position, 



378; as food, 384 

 Perch-like fishes, origin, 362 

 Percidae, distribution, 274; see also 



Perch 

 Percoidea, 378 

 Percomorphi, 378 

 Percopsidae, 278, 378; see also Trout 



Perch 

 Pericardium, 1 72 

 Periglacial region, 260 



