720 



INDEX 



Shark {Cont.): 



as food, 376 



for leather, 376 



for vitamins, 376 

 Sharksuckers, 395 

 Shearwater, 461 

 Sheep, 491, 621, 622 



tick, 259 



wool, 473 

 Sheet-web weavers, 278 

 Shell, bird's egg, 442, 443 



clam, 283 



gland, 374 



Hydra, 116 



membrane, egg, 443 



mussel, 540 



squid, 293 



turtle, 408 

 Shellac, 255 

 Shinbone, 501 

 Shipworm, 299 

 Shore crab, 199 

 Shorebirds, 452, 461 

 Shoulder blade, 501 



girdle, 502 

 Shrews, 464, 483, 495 

 Shrike, 462 



Shrimp, 211, 217, 219 

 Siamese cats, 589 



twins, 598 

 Sight, bird, 442 

 Sigmoid, 515 

 Silk, 255 



glands, 269, 272 



moth, 265 



worm, 254 

 Silky flycatcher, 462 

 Silphidae, 248, 264 

 Silurian period, 617 

 Silverfish, 261 

 Simla, 489 



Similarities in animals, 615 

 Simple sugars, 519 

 Simuliidae, 265 

 Sinanthropus, 625 

 Sinistral coil of shells, 292 

 Sinus, 207 



cardiac, 207 



pericardial, 206, 208 



perivascular, 207 



perivisceral, 207 



sternal, 207, 208 



venosus, 330, 336, 337, 338 

 Siphon, clam, 284, 285, 287 



sea urchin, 309 



shipworm, 299 



squid, 293 



tunicate, 323 

 Siphonaptera, 229, 242, 260, 262, 



265 

 Siphonoglyph, 123 

 Siphuncle, 296 

 Siren, 396, 397, 404 

 Sirenia, 464, 496 



Sirenidae, 397, 404 



Sittidae, 462 



Skates, 324, 376 



Skeletal muscle, 85, 86, 504, 505 



Skeletal structure, 498-503 



axial, 501 



endoskeleton, 498 



exoskeleton, 498, 499, 500 



internal, 500 



joints, 503 



movement, 498, 499 



protection and movement, 498, 

 503 



types, 500 

 Skeletal systems, 87, 498-503 



amphioxus, 318 



aquatic vertebrates, 500 



bird, 435, 437 



cat, 465, 466 



crayfish, 198 



dogfish shark, 370 



fish, 381 



frog, 343-346 



insect, 230 



lamprey, 361 



man, 500-503 



Metazoa, 83, 87 



sea urchin, 309 



snake, 418 



starfish, 303 



turtle, 406 



vertebrate, 83 

 Skimmers, 461 

 Skin, frog, 328 



glands, 474 



man, 328, 329 



vertebrates, 328 

 Skinks, 407, 430 

 Skippers, 265 

 Skuas, 461 

 Skull, cat, 466 



fish, 381 



frog, 345 



man, 501, 502 



pigeon, 436 

 Skunk, 484, 486, 496 



fur, 473 

 Slime eels, 366 



gland, 291 

 Sloth, 485, 496, 611 

 Slug, 293 



Small intestine, 515, 518 

 Smell, 548 



Smooth muscle, 85, 86, 346, 504 

 Smyrna fig, 640 



wasp, 640 

 Snail, 283, 293, 607 



internal structure, 292 



locomotion, 291 



slime gland, 291 

 Snake-necked turtle, 407 

 Snakes, 317, 325, 405, 415-419, 

 430 

 black, 416, 418 



Snakes {Cont.) : 



blind, 417, 430 



blow, 418 



blue racer, 416, 418 



boa, 417, 419 



cobra-de-capillo, 423 



cobras, 423 



copperhead, 423, 426 



coral, 423, 425 



cottonmouth, 423, 425 



garter, 417, 421 



harlequin, 423 



hog-nosed, 416, 418 



king, 418, 421 



milk, 418 



moccasin, 423, 425 



poisonous, 419, 422-426 



puff adder, 416 



pvthon, 416, 417, 420 



rattle, 417, 418, 423, 425, 427 



ringhals, 424 



sea, 423 



skeleton, 418 



timber, 427 



venomous, 419, 422-426 



vestigial hindlimbs, 416 



water moccasin, 423, 425 

 Snappers, 395 

 Snappmg turtle, 411, 429 

 Snout beetle, 264 

 Snow geese, 448 

 Social insects, 250-254 

 Sociology, 10 

 Soft-shell, clam, 298 



turtle, 412, 429 

 Soil Protozoa, 75 

 Sol, 15 



Soldier termite, 253 

 Sole, 394, 395, 474 

 Solenichthyida, 395 

 Soleus, 505, 506 

 Solpugida, 268, 279 

 Somatic cells, 576, 577 



mesoderm, 565 

 Somatoplasm, 563 

 Somite, 89, 171, 192, 565 

 Songs, birds, 447 

 Sound production in fish, 389 

 South American monkeys, 489 

 Sow bug, 199, 221 

 Space travel, problems of, 556 

 Spadefoot toads, 397, 404 

 Sparrow, 446, 462 



hawk, 453 

 Spat, 297 



Special creation, 602 

 Species, definition of, 8 

 Spemann, 568 

 Sperm, 80, 104, 119 



bundle, 48 



cell, 79, 576 



crayfish, 212 



duct, 135, 140, 144, 226, 342 

 formation of, 574 



