INDEX 



725 



Vessels {Cont.) : 



subneural, 176 



typhlosolar, 176 



ventral, 176 

 Vestibule, 549 

 Vestigial hindlimbs, 416 



organs, 612, 614 



wing, 623 

 Vibrissae, 465 

 Villus, 517, 518 

 Vinegar eel, 153 



digestive system, 154 



reproductive system, 154 



structure, internal, 154 

 Viper, 425 

 \''iperidae, 407 

 Vireonidae, 462 

 Vireos, 462 

 Virus, 604 



research, 603 

 Visceral arch, 344 



nervous system, 208 



peritoneum, 331 



pleura, 537 



skeleton, 344 

 Vision, crayfish, 209, 210 

 Visual purple, 521, 550 

 Vitamins, 521-524 



deficiency, 522 

 Vitellarium, 165 

 Vitreous body, 233 



humor, 550 

 Viviparous, 80 

 Vocal cords, 334, 469, 535 



sacs, 330 

 Voice box, 334 

 Voluntary acts, 547 



muscle, 346, 505 

 Volvent, 109 

 Volvox, 48, 49, 74. 562 



natural death, 563 



reproduction, 48, 562 

 asexual, 48, 562 

 sexual, 48, 562 

 Vomer, 343, 344, 500 

 Vomerine teeth, 344 

 Von Baer, 656 

 Vorticella, 64, 65, 66 

 Vultures, 453, 461 

 Vulva, 151, 154 



W 



Wadingbirds, 445, 446 



Wagtails, 462 



Walking leg, 205, 269, 274 



stick, 250, 263 

 Wall gecko, 407, 430 



lizard, 407 

 Wallace, 649 

 Walrus, 480 

 Wapiti, 493 

 Warble fly, 260 



Warblers, 446 

 Warm blooded animals, 87 

 Wasps, 251, 260, 265 

 Waste disposal, 537 



products, transportation of, 87 

 Water, 17, 518, 541, 631 



bear, 268 



boatman, 263 



bug, 263 



flea, 215 



fowl, 451 



moccasin, 423, 425, 430 



pore, 287 



scavenger, 264 



strider, 250, 263 



tube, 287 



vascular svstem, 303, 310 

 Wax plate, 245 

 Waxwings, 462 

 Weasel, 486 

 Weaver finches, 462 

 Web feet, birds, 446 



frog, 327 

 W^eb, food. 647 



of hfe, 634, 635 



spider, 272 

 Weevil, 248 

 Western box turtle, 413 

 Whale, 525, 486 



blue, 486, 487 



dolphin, 486 



gray, 486 



humpback, 486 



killer. 486 



narwhal, 486 



porpoise, 486 



right, 496 



rorqual, 486 



sperm, 486 



sulphur-bottom, 486 



toothed, 496 



whalebone, 480, 486 

 Wheel, organ, 318 

 Whelk, 282, 292, 293 

 Whip scorpion, 268 

 Whip-poor-will, 449, 461 

 Whipworm, 157, 158 

 Whirligig beetle, 248, 264 

 Whiskers, 465 

 White ants, 263 



blood corpuscles. 335, 383 



flies, 264 



grubs, 259 



matter, brain, 353 



pelican, 461 



shark, 373 

 Whitefish, 395 

 Whites, 265 

 Wild turkey, 453 

 Wildcat, 493 

 Wing, beat rate, 500 



bird, 438, 443 



grasshopper, 231, 233 



Wing (Cont.): 



insect, 233, 234, 244 

 in flight, 234 

 Wingless birds, 450 

 Winter eggs, 165 



rings (scales of fish), 388 

 Winterkill of fish, 384 

 Wishbone, 437 

 Wolf, 486 



spider, 278 

 Wolverine, 493 

 Wood borers, 264 



frog, 402 



pewee, 456 



warblers, 462 

 Woodchuck, 485 

 Woodcock, 446 

 Woodpecker, 454, 462 

 W^ool, 473 



Woolly monkeys, 489 

 Workers, bee, 251 

 "Worm disease" in oysters, 194 

 Worm lizard, 430 

 Wren, 462 

 Wrist, 346, 501 

 Wrynecks, 462 

 WuchcTeria, 157, 158, 159, 16i 



X chromosome, 583, 584 

 X rays, 658, 659 

 Xenos, 264 

 Xerophthalmia, 521 

 Xiphisternum, 345 

 Xiphosura, 268, 277 



Y chromosome, 582, 583, 584 

 Yellow fever, 260 



mealworm beetle, 261, 264 

 Yellow-bellied sapsuckcr. 451, 454 

 Yellow-billed cuckoo, 461 

 Yellows, 265 

 Yoldia, 298, 301 

 Yolk, 356, 357 



bird's egg, 443 



cell, 357 



duct. 140 



gland, 135, 140, 144 



plug, 356, 357 



sac, 478 



white, 443 



yellow, 443 

 Yucca moth. 640 



Zebra, 464, 496 

 Zenaidura, 461 



