754 
INDEX 
Rhipidistia, 477 n. 
Rhizodontidae, 478, 202 
chizodopsis, 479, 228; R. 
skull, 478 
Rhizodus, 478, 202 
Rhodeus, 582; R. anarus, 584; oviducal 
tubes, 408 ; embryos in gill-cavities of 
Unio, 416 
Rhodichthys, 712 
Rhodosoma, 73; R. callense, 72 
Rhombatractus, 639 
Rhomboidichthys, 6 687 
Rhombosolea, 687 
Rhombus, 687, 264; R. aculeatus, 262 ; 
2. maximus, 264, 275—see also Psetta 
Rhyacichthys, 6S9 
Rhynchobatus, 460 
Rhynchobdella, 717 
Rhynchodus, 468 
Rhypticus, 660 
Ribbon-Fish, 715, 152, 160 
Ribs, 205 
Ridewood, 542 n. 
Rita, 588 ; R. crucigera, 303 
Ritter, 8 2. , 39, 83, 690 n. 
Rivulus, 616 
Rocklings, 649, 288 
Rohde, 113 
Rohteichthys, 582 
Rolph, 113 
Rondeletia, 614 
Rosette-organ, 97 
Roule, 38 
Rowntree, 579 n., 
Rudder-Fish, 648 
Ruvettus, 679 
Ryder, 711 n. 
sauroides, 
621 n. 
Saccarius, 720 
Sacchi, 696 n. 
Saccobranchus, 588, 590; air-sacs, 295 ; 
S. fossilis, 295; S. singio, 295 
Saccodon, 576 
Saccopharyngidae, 603 
Saccopharynz, G04; SS. ampullaceus, 
604 
Sachs, 581 n. 
Sagemehl, 542, 573, 575, 579n., 586 n., 
649 n. 
Sagenodus, 907 
Sail-Fishes, 679 
Salanx, 566 
Salarias, 709, 710 
Salensky, 39, 411 
Salminus, 575 ; S. orbignianus, 578 
Salmo, 565, 566 f., 567, 290; pyloric caeca, 
275; spiracles in the embryo, 283 ; 
pseudobranch, 284; S. alpinus, 567 ; 
S. fario, 567; caudal portion of the 
vertebral column, 237; pectoral girdle, 
240; dissection to show the internal 
organs, 256 ; brain, 375 ; section of the 
_ Salmonidae, 465, 544, 269; 
eye, 394; S. fontinalis, 567 ; S. irideus, 
567 , S. salar (Salmon), 567, 323 ; skull, 
211 f., 212, 213, 214; kidneys, gono- 
ducts, and abdominal pores in the 
female, 405, 406; deposition of eggs 
415; length of hatching, 417; SWS. 
salvelinus, pectoral fin, 243; S. stom- 
achicus, gizzard, 260 ; S. trutta, 567 
Salmon, 566 f.—see also Salmo salar 
distribution, 
566 ; liver, 272 ; abdominal pores, 402 ; 
oviducts, 405 ; eggs, 411 
Salmopercae, 6:20 
Salpa, 101, 36, 387; arrangement of 
zooids, 102, 103; structure, 104, 105; 
alternation of generations, 105; develop- 
ment and life-history, 106; classifica- 
tion, 108; S. democratica-mucronata, 
young, 107; S. hexvagona, 106; SS. 
pinnata, endostyle and stolon, 103; S. 
runcinata - fusiformis, 102, 108 —see 
also Cyclosalpa, Tasis, Pegea, and 
Thalia 
Salpians, 64 
Salpidae, 207, 39, 110 
Salvelinus, 567 
Sand-Eel, 639, 275 
Sander, 659 
Sarcodaces, 575 
Sarda, 678 ; S. orientalis, caudal fin of, 
675 
Sardine, 564 
Sardinioides, 611 
Sardinius, 611 
Sargus, 665 
Sars, G. O., 21, 
Sars, M., 21 
Saurenchelys, GOL 
Saurida, 611 
Saurie, 638 
Saurocephalus, 561 
Saurodon, 561 
23 
| Saurodontidae, 567, 544 
Saurogobio, 582 
Sauropsida, 744 
Saurus, 611 
Saury Pike, 411 
Savi’s vesicles, 384 
Savigny, 36 
Saw-Fishes, 457, 459 ’ 
Scabbard-Fish, 679 
Seales, 185 f. ; Acipenser ruthenus, 187 ; 
Antennarius hispidus, 191; Balistes 
capriscus, 191; Centriscus scolopax, 190 ; 
Hypostoma commersonit, 192; Lepi- 
dosteus, 188; L. osseus, 186; Mona- 
camthus scopas, 191 ; Salmo Sar se 190; 
as an index of age, 191 
Scapanorhynchus, 453 
Scaphirhynchus, 495; S. platyrhynchus, 
495 
Searidae, 674, 651, 654 
