Index. 



555 



Soutellum, 259 

 Soyllarus, 225 

 Soyllium eanicula, 383 

 Soymnus borealis, 383 

 Soyphomedusae, 109 

 Sea-acorns, 206 



„ Anemones, 118 



„ Adder, 391 



„ Angel, 384 



„ Bear, 519 



„ Clerk, 323 



„ Cows, 512 



„ Cucumbers, 138 



„ Elephants, 526 



„ Feathers, 115 



„ GuUs, 443 



„ Hare, 303, 390 



„ Hedgehog, 391 



„ Hog, 524 



„ Horse, 391 



„ Lilies, 127 



„ Lion, 519 



„ Mouse, 173 



„ Otter, 515 



„ Palms, 130 



„ Eoses, 118 



„ Scorpion, 390 



„ Squirts, 537 



„ Stickle, 377, 390 



„ Urchins, 134 

 Seasonal dimorphism, 38 

 Sebaceous glands, 468 

 Secondary sexual charac- 

 ters, 35 

 Secretary, 460 

 Sectorial tooth, 514 

 Segmentation, 156 



„ cavity, 43 



Segments, 41, 184 

 Selache maxima, 383 

 Selachii, 383 

 Self fertilisation, 36 

 Semicircular canals, 338 

 Seminal duct, 34 

 Seminal tubes, 243 

 Semnopithecidse, 534 

 Semnopithecus nasicus, 



534 

 Sense of equilibrium, 20 

 Sense organs, 18 

 Sensory ceUs, 13 

 Sepia officinalis, 323 

 Serous membrane, 354 

 Serpula, 173 

 Serpulidae, 173 

 Sesamoid bones, 330 

 Sesia, 274 

 Sessile forms, 65, 66 



„ medusa, 106 

 Seta, 185 

 Seventeen-years Cicada, 



257 

 Sexual reproduction, 31 

 Shad, 387 

 Shark, 328 

 Sharks, 383 



Blue, 383 

 Greenland, 383 



Sharks, Giant, 383 



„ Hammer-headed, 

 383 

 Sheat-flsh, 388 

 Sheath of Schwann, 13 

 Sheep, 509 

 Sheep Bot-fly, 277 



„ Tick, 278 

 Shell, 92, 182, 287 

 SheUac-insect, 259 

 SheU-glaud, 143, 192 

 Shield-urchins, 138 

 Ship-worm, 315 

 Shore-crab, 227 

 Shoulder-blade, 327 

 girdle, 327 

 Shrew, 499 

 Shrikes, 462 



Great Grey, 462 

 Sibbald's Fin-whale, 523 

 Siberian sub-region, 74 

 Siliceous fibres, 120 

 Silk glands, 248 



„ -worm Moth, 245, 274 

 Silpha, 264 

 Silphidffi, 264 

 Siluridffi, 388 

 Silums glanis, 388 

 Simla Gorilla, 535 



„ Troglodytes, 535 

 Simulia, 276 



„ columbaczensis, 

 276 

 SinupaUiate, 310 

 Sinus venosus, 344 

 Siphon, 137 

 Siphonophora, 107 

 Siphonozooids, 114 

 Siphuncle, 317 

 Siredon mexicanus, 403, 



404 

 Sireuia, 512 

 Siren lacertina, 405 

 Sirex, 269 

 Siskin, 463 

 Sitta csBsia, 464 

 Sittacinse, 465 

 Skates, 383 

 Skeletal tissues, 7, 9 

 Skeleton, 4, 15, 85 

 Skeleton Shrimp, 219 

 Skin, 14 



Skin glands, 237 

 Skinks, 422 

 Skip-jacks, 265 

 SkuU, 327 

 Skunks, 516 

 Sleep, 69 

 Sloth Bear, 516 

 Sloths, 525 

 Slough, 407 

 Small Bats, 501 

 Small TortoisesheH, 275 

 Sminthus betulinus or 



vagus, 530 

 Snakes, 422 



„ ^sculapius, 424 

 Giant, 424 



Snakes, Binged, 424 

 „ Sea, 424 

 Whip, 424 



Snipe, Common, 459 

 „ Great, 459 

 „ Jack, 459 



Snipes, 459 



Solaster, 133 



Soldiers, 254, 270 



Sole, 389 

 „ (of foot), 469 



Solea vulgaris, 389 



Solenoglypha, 425 



Solitary Bees, 272 

 „ Corals, 117 



Somateria mollissima, 458 



Sorex, 499 



„ pygmseus, 500 

 „ vulgaris, 500 



Sound-producing organs,30' 



Spalax typhlus, 530 



Spanish-fly, 266 



Sparrow, 463 



House, 463 

 Tree, 463 



SpatangidsB, 138 



Spatangus, 138 

 Spatularia, 385 

 Species, 53 

 Spermatophore, 34 

 Spermatozoon, 32, 33 

 Spermophilus citillus, 52^ 

 Sperm Whale, 524 

 Sphenoid, 362 

 Sphenethmoid, 394 

 Spheridia, 138 

 Sphingidse, 275 

 Sphyma, 383 

 Spicula, 159 

 Spider Monkey, 533 

 Spiders, 283 

 Spinachia vulgaris, 390 

 Spinal cord, 324, 330, 331» 

 Spines, 123, 137 

 Spinnerettes, 283 

 Spinning glands, 279 

 Spiny Arit-eater, 496 



„ Dog-fish, 383 

 Spiracle, 373 

 Spiral valve of intestine, 



371 

 Spleen, 348 

 Sponges, 83, 118 

 Spongise, 118 

 Spongilla fluviatiUs, 121 

 Spontaneous movement, 3 

 Spoon-billed Sturgeon, 385 

 Spores, 96 

 Sporocyst, 147 

 Sprat, 387 

 Spring-flies, 262 

 Spur, 235, 435 

 Squalidee, 383 

 Squamipennes, 390 

 Squamosal, 362 

 Squatina, 384 

 Squilla mantis, 227 

 Squirrel, 529 



