750 INDEX 
Pelvic girdle, 239 f., 240, 241 
Peimpheridae, 656, 653 
Pempheris, 657 ; P. muelleri, 657 
Penetopteryx, 634, 635 
Pentaceropsis, G60 
Pentaceros, 660 
Pentacerotinae, 660 
Pentanemus, 641; P. quinquarius, 162 
Pentapus, 664 
Pentaroge, 695 
Peprilus, 643 
Perca, 659, 262; alimentary canal, 275; 
veins, 323; thyroid, 343; auditory 
organ, 388; P. fluviatilis, 659, 321, 
Percalates, 659 
Percarina, 659 
Percesoces, 636 f. 
Perch, 659 ; deposition of eggs, 411; = 
Perca, q.V. 
Percichthys, 659, 660 
Percidae, 658, 654, 412 ; coloration, 166 
Perciformes, 652 f., 651 
Percilia, 659 
Percina, 659 
Percophiidae, 705, 703 
Percophis, 705; P. brasilianus, pectoral 
arch of, 703 
Percopsidae, 620, 606 
Percopsis, 621 
Peribranchial budding, 82 
Peribranchial cavity, 43, 44, 59, 63; of 
Thaliacea, 95, 101 
Pericardium, of Hemichordata, 15; of 
Tunicata, 44, 49; of Fishes, 327 
Perihaemal spaces, 9 
Periophthalmus, 689, 690, 3855; eyes, 
155; pectoral fins, 16); tail as a re- 
spiratory organ, 289; P. koelreuteri, 
690 n. 
Peripharyngeal bands, 45, 46, 52, 53 
Peripharyngeal spaces, 9 
Peristedion, 701 
Péron, 36 
Perophora, 72, 84; P. listert, 72 
Petalodoutidae, 446 
Petalodus, 446 
Petalopteryx, 498 
Petersen, 690 n. 
Petersius, 575 
Petrocephalus, 551 
Petronvyyzon, 426, 147, 258, 367, 382; 
external characters, 150; skull, 217; 
teeth, 247, 248; spiral valve, 264; 
liver, 272; pancreas, 273; gill-sacs, 
279, 280; heart, 327; arteries, 329, 
330; blood corpuscles, 341; thyroid, 
313, 344; supra-renal bodies, 346 ; 
brain, 371, 372, 392 ; spinal nerves, 378 ; 
auditory organ, 387; olfactory organ, 
891, 392; naso- pituitary involution, 
391; pituitary caecum, 392; parietal 
eye, 5395, 396; kidneys, gonads, and 
genital pores, 399, 400, 403; distribu- 
tion, 426; P. fluviatilis, 426; P. 
marinus, 426; P. planeri, ova, 428 ; 
P, wilderi, spawning, 427 ; larva, Am- 
mocoetes stage, 428 
Petromyzontes, 425 f. 
Petromyzontidae, 426 
Petroscirtes, FO9 
Phago, 576 
Phallusia, 72 
Phaneropleuron, 506, 519; P. andersoni, 
506 
Phanerosteon, 487 
Pharyngeal teeth, 251 
Pharyngodictyon, 87; P. mirabile, 80 
Pharyngognathi, 543 
‘Pharyngopneusta, 30 n. 
Phisalix, 705 n. 
Philyctaenaspis, 536 
Pholedichthys, 709 
Pholididae, 777, 704 
Pholidophoridae, 545, 541 n., 544 
Pholidophorus, 545 
Jey ralhiss © (ill, “Flee 
415 
Phoronidea, 27 f., 5 
Phoronis, 27 f., 5; regeneration, 16, 30; 
P. buskii, 28 
Phorozooid, 99, 100 
Phosphorescent organs, 178 
Photichthys, 571, 570 
Photoblepharon, 660 
Photonectes, 571 
Photophores, 178, 612, 613, 624, 711 
Photostomias, 571 
Phractolaemidae, 560, 544 
Phractolaemus ansorgti, 560, 560 
Phractura, 588 
Phthinobranchii, 629 
Phycis, G48 
Phyllodoce, nephridium, -127 
Phyllodus, 67 4 
Phyllopteryx, 634; P. eques, 635 
Phylogephyra, 565 
Physailia, 588 ; 
Physalia, with Nomeus, 643 ; 
Physiculus, G48 
Physoclisti, 306, 807, 311 , 
Physopyxis, 588 
Physostomi, 543, 306, 311 
Piabucina, 575; P. argentina, mouth, 
577 
Pike, 609, 230, 307 
Pike-Perch, 659 
Pilchard, 564, 389 
Pilot-Fish, 677 
Pimelepterus, 657 
Pimelodina, 588 
Pimelodus, 588, 589, 361 
Pimephales, 582 
Pipe-Fish, 634, 154 
P. gunnellus, 712, 
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