INDEX 



455 



Porcupine-fish, 95; form of body, 

 i6; habits, 17; locomotion, 27; 



spines, 98; teeth, 137; systematic 



position, 379; helmets from skins, 



401 

 Pores, of lateral line, 200 

 Porichthys, see Toad-fish 

 Port Jackson Shark, 124; teeth, 124, 



126; egg-capsule, 319 

 Portuguese Man-of-war-fish, 246 f. 

 Praemaxillary, 108 

 Pre-Cambrian period, 342 

 Priapium, 296 

 Pride, 331 



Primary vesicles, 177 

 Prionotus, see Sea Robin 

 Priority, 371 

 Pristidae, 376 

 Pristiophoridae, 376 

 Pristiophorus, see Saw Shark 

 Pristis, see Saw-fish 

 Pristiurus, see Black-mouthed Dog-fish 

 Procurrent rays, 72 

 Protective colours, 209 f. 

 Protein, 381 

 Protopterus, see African Lung-fish, 



Lung-fish, Mud-fish 

 Protospinacidae, 376 

 Protospinax, 353 

 Protospondyli, 377 

 Protractile mouth, 1 1 7 

 Psephurus, see Chinese Sturgeon 

 Psettodes, dorsal fin, 68 ; mouth, 118; 



systematic position, 379 

 Psettodoidea, 379 

 Pseudecheneis, 237 

 Pseudobranch, 39 

 Pseudopleuronectes, see American 



Flounder 

 Pseudoscarus, see Parrot-fish 

 Pteraspis, 348 

 Pterichthys, 349, 350 

 Pterois, see Scorpion-fish 

 Pterophryne, 215; colours, 215 

 PterophyUiim, see Angel-fish 

 Pteroplatea, see Butterfly Ray 

 Pterygoid bones, 108 

 Pterygoid teeth, 128 

 Pterygo-quadrate, 106, 108 

 Ptomaine poisoning, 145 

 Puffer, spines, 98; poisonous flesh, 



144 f. ; systematic position, 379; 



see also Globe-fish 



Pug-headed Trout, 419 



Pugnacity, of breeding males, 285, 



302 f. 

 Pulp cavity, 86, 121 

 Pupil, 186 

 Purse Seine, 393 

 Pycnodontidae, 360 

 Pygidiidae, 250 

 Pyloric caeca, 169 

 Pyloric valve, 1 70 



Quinnat, spawning, 286 



Raad, see Electric Cat-fish 



Rabbit-fish, 35, 200; skull, 131 



Races, 264 



Radial, 57 



Radio fish-screen, 202 f. 



Raid, see Ray, Skate 



Raiidae, 376 



Rainbow Trout, 369; introduction, 

 410 



Rains of fishes, 430 f. 



Ranzania, see Truncated Sun-fish 



Rat-tail, see Grenadier 



Rate of breathing, 43 



Ray, 17, 35, 295; form of body, 15; 

 locomotion, 27; respiration, 41; 

 median fins, 63; caudal fin, 74; 

 pectoral fin, 75; dermal denticles, 

 86; mouth, 105; feeding, 105; 

 teeth, 126 f.; electric organs, 147; 

 intestine, 170; spiral valve, 171; 

 brain, 178; eyes, 186; colours, 

 215; secondary sexual characters, 

 295 f. ; eggs, 319, 320 f. ; classifica- 

 tion, 376 



Recapitulation, 62 



Recognition marks, 222 



Rectum, 1 70 f. 



Red bodies, 174 



Red corpuscles, 40 



Red-fish, 284 



Red Herring, 396, 398 



Red Mullet, head, 197; colour 

 changes, 222; systematic position, 

 378 



Red Sea fishes, 258 



Redd, 285 



Reflex action, 205 



Refrigeration, 395 



Regalecus, see Oar-fish, Ribbon-fish 



Regeneration, 420 f. 



