INDEX 



749 



Snakes, 568, 585, 587 



Snapper, 597 



Snapping turtles, 597 



Soaring of birds, 611 



Soft palate, 641 



Solaster, 338 



Sole, 494 



Solea, 494, 515 



Solen, 308 



Solenocytes, 93, 401 



Solenodontidae, 672 



Solenogastres, 296, 325 



Somite, 138, 393 



Songsters, 633 



Sorex, 671, 720 



Soricidae, 671, 720 



Spadella, 383, 384 



Sparrow, 635 



Spatangoidea, 356, 368 



Species, 8; origin of, 11 



Spelerpes, 544 



Spermathecae, of Helix, 295; of Lum- 



bricus, 139, 156 ; of Mesostoma, 97 

 Spermatophores, of Helix, 295 ; of 



Hirudo, 164 ; of Sepia, 321 

 Spermatozoa, 8 ; of Hirudo, 164 ; of 



Hydra, 53; of Lumbricus, 156 

 Sperm-sac, 465 

 Sperm-whale, 681 

 Sphaerularia, 131 

 Sphenethmoid, 548 

 Sphenisciformes, 634 

 Spheniscus, 634 

 Sphenodon, 568, 575, 583, 604 

 Sphenotic, 476 

 Sphincter, 461 

 Sphyranura, 103 

 Spicules, 71, 88, 91 

 Spider, 260, 261, 262, 263, 264, 265, 



266, 275; web of, 262 

 Spider-monkeys, 712 

 Spinal cord, 385, 396, 398, 416 

 Spinal ganglia, 424 

 Spine, 651 

 Spines, 346 

 Spinnerets, 261, 262 

 Spiny ant-eater, 656 

 Spiny dog-fish, 467 

 Spiracle, 426, 456, 458 

 Spiral valve, 430, 516 

 Spirula, 297 



Splanchnic peritoneum, 153 

 Spleen, 436, 533 



Splenial bone, 498, 516, 532, 575 

 Sponges, 84; complex, 88; larva of, 89 

 Spongilla, 87, 91 

 Spongin, 91 

 Spores, 19, 28-, 45 

 Sporocyst, 105 

 Sporozoa, 43, 44, 47 

 Sporulation, 19 



Sprat, 489 



Squalus, 453, 467, 512 



Squame, 185 



Squamosal, 549, 574, 575, 585, 595 



Squid, 284, 309, 312 



Squilla, 220, 279 



Squirrel, 702, 703, 704 



Stag-beetle, 245 



Stapes, 645 



Star-fish, 326, 327, 329, 332 



Star-nosed mole, 672 



Statoblasts, 379 



Steapsin, 429 



Steganopodes, 632 



Stegocephala, 524, 528, 560, 602 



Stellate ganglia, 319 



Stercoral pocket, 264 



Sterna, 232 



Sternal ribs, 594, 609 



Sternebrae, 650 



Sternohyoid, 527 



Sternum, 236, 237, 532, 550 



Stimulus, 6-7 



Sting-ray, 470 



Stoat, 676 



Stolon, 65, 71, 338 



Stomach, 17, 50, 86, 87, 347 



Stomatopoda, 217, 220, 279 



Stomodaeum, 69, 136, 166, 396, 427 



Stone-canal, 334 



Stork, 632 



Streptoneura, 323 



Streptoneurous, 297 



Striated rods, 421 



Strix, 635 



Strobilisation, 77, 78, 106 



Strongylocentrus, 344 



Structureless lamella, 55 



Struthio, 618, 631, 633 



Sturgeon, 501, 502 



Stylet, 114 



Stylopyga, 233, 234, 235, 239, 280 



Subclavian artery, 431, 535 



Subfilamentar tissue, 302 



Sub-intestinal vessel, 145 



Sublingual glands, 625, 655 



Submaxillary glands, 625, 655 



Sub-mentum, 236 



Sub-neural gland, 407 



Sub-pharyngeal ganglion, 148 



Sub-umbrella, 62 



Sub-ungulata, 684, 722 



Sub-vertebral wedge, 569 



Suctoria, 42, 47 



Suctorial-stomach, 245 



Suidae, 691 



Suinae, 691, 723 



Sula, 609, 634 



Summer-eggs, 98, 124, 206 



Sun-star, 338 



Supination, 522 



