748 



INDEi 



Scaly ant-eater, 666, 669 



Scaphiopiis, 559, 562 



Scaphirhynchus, 473, 501, 517 



Scaphognathite, 183, 185 



Scaphopoda, 325 



Scapula, 483, 532, 594 



Scapular artery, 581 



Schizognathous palate, 633, 634 



Schizopod, 216 



Schizopoda, 215, 220, 278 



Sciatic plexus, 555 



Sciatic vein, 535 



Scirtopoda, 126 



Sciuridae, 701, 702 



Sciuropterus, 702, 703 



Sciurus, 702, 725 



Scleroblasts, 87 



Sclerotic coat, 422 



Scomber, 493, 515 



Scombridae, 493, 515 



Scopula, 261 



Scorpio, 270, 282 



Scorpion, 260, 269, 270, 271 



Scorpionida, 269, 282 



Scotophilus, 708 



Scutes, 483, 496 



Scutum, 212 



Scyllium, 415, 418, 432, 436, 457, 459, 



460, 464, 466, 467, 468, 512 

 Scyphistoma, 77, 78 

 Scyphozoa, 75, 83 

 Sea-anemones, 68, 73 

 Sea-bass, 493 

 Sea-bream, 493 

 Sea-cows, 678, 698 

 Sea-cucumber, 326, 357, 358, 359, 



360 



Sea-hare, 293 

 Sea-lion, 679 

 Sea-mussel, 308 

 Sea-snails, 297 

 Sea-spiders, 275 

 Sea-squirt, 410 

 Sea-urchins, 326, 344, 345, 352, 354, 



355 



Seal, 678 



Seal-skin seal, 678 

 Sebaceous glands, 638 

 Sebum, 638 

 Secondaries, 609, 611 

 Secretions, 5, 19 

 Segmentation, 138, 174 

 Selachoidei, 467, 512 

 Selection, natural, 12, 13 

 Selenodont, 694 

 Selenodontia, 692, 694, 724 

 Semicircular canals, 420, 444 

 Semnopithecus, 712, 727 

 Sense-capsules, 421; -cell, 63, 199, 418, 



421, 422 ; -hairs, 55, 63, 418, 422 ; 



-organs, 63, 199, 418, 443 

 Sensory peripheral nerve, 150 



Sepia, 312, 313, 314, 316, 317, 318, 

 319, 320, 321, 322, 323, 325 



Septa, 140 



Serotine, 708 



Serranidae, 493, 515 



Serranus, 515 



Sexual reproduction, 8, 9 



Sexual union, 7 ; reproduction, 8 



Shad, 489 



Shark, 456, 465 



Sheep, 692 



Shell, of Brachiopods, 370, 371 ; of 

 Molluscs, 284, 297, 298, 299 



Shell- fish, 284 



Shell-glands, 97, 206 



Ship-worm, 308 



Shore-crab, 218 



Shrew-mice, 671 



Shrikes, 633 



Shrimps, 219 



Siales, 253, 281 



Siliceous substance, 26 



Silicoflagellata, 34, 46 



Silk, 262 



Silk- worm, 249 



Silk-worm moth, 250, 258 



Siluridae, 491, 514 



Silver-fish, 251 



Simla, 711, 712, 727 



Simiidae, 712, 713, 727 



Simocephalus, 205, 207, 208, 277 



Simplicidentata, 702, 725 



Sinus, dorsal and ventral, 163 



Sinus venosus, 430 



Siphon, 303, 350 



Siphonaptera, 258, 272 



Siphonoglyph, 72, 73 



Siphonophora, 66, 67, 82 



Siphuncle, 323 



Sipunculoidea, 167, 168, 170 



Sipunculus, 170, 172, 173 



Siredon, 543 



Siren, 542, 561 



Sirenia, 698, 699, 700, 725 



Sirenidae, 561 



Sirex, 256 



Skates, 465, 470 



Skeletal spicules, 91 



Skeleton, of Amphibia, 519, 522, 527, 

 547 ; of Birds, 609, 613, 615 ; of 

 Echinoderms, 327, 345 ; of Fishes, 

 474, 508, 509 ; of Mammals, 650 ; 

 of Eeptiles, 569, 591 



Skin, 52, 424, 455, 637, 517 



Skunk, 676, 677 



Sloths, 666, 668 



Sloughing, 567 



Slow-worm, 586 

 ,Slug, 284 



Smittia, 376 



Smooth dog-fish, 467 



Snail, 284, 285 



