606 



Venous blood, 102 

 Vmtral aorta, 483 



fin, 462 



nerve-cord, 113 



nerve-root, 468 

 Ventricles of brain, 469 



of heart, 101, 483 

 Yenus, 324 

 Yenus girdle, 235 

 Yenus' flower basket, 204 

 Yermes, 237 



Yermiform appendix, 554 

 Yermilinguia, 530, 563 

 Vermis, 470 

 Vermetus, 327 

 Vertebral column, 452 

 Yertebrata, 449 



circulation of, 483 



digestive organs, 481 



ear, 477 



eye, 120, 475 



respiratory organs, 482 



skeleton, 453 



skin, 450 



sense organs, 473 



urogenital system, 486 

 Vertex, 405 

 Vesicularia, 287 

 Yespariae, 426 

 Yespertilionidae, 565 

 Vesperugo, 565 

 Vestibule, 538 

 Vibracularia, 286 

 Vibrissse, 545 

 Vicarious species, 46 

 Vinegar eel, 265 

 Viperidae, 531 

 Visceral arches, 460 



ganglia, 312 



muscles, 472 



sac, 310 



skeleton, 459 

 Vision, 118 

 Visual cells, 118 



purple, 119 

 Vital force, 3 

 Yitellaria, no, 240 

 Vitreous body, 120 

 Yitrodentine, 494 

 Yiverra, 565 

 Viviparous, 151 

 v Voluntary muscles, 81 

 Yolutida.-, 334 

 Yolvocina, 184 

 Volvox, 182, 184 



INDEX 



Yomer, 461 

 Vortex, 109, 242 

 Yorticella, 197 



Wading birds, 543 

 Waklheimia, 288 

 Walking leaf, 37 

 Walking stick, 421 

 Wallace's Line, 34, 162 

 W'alrus, 565 

 Warblers, 544 

 Warm blood, 104 

 Wasps, 426 

 Water beetles, 424 



bears, 398 



mites, 397 



scorpion, 428 



snakes, 531 

 Water-vascular system, 105, 



292 



Weasel, 565 



Weberian apparatus, 503 

 Weevils, 424 

 Whalebone, 571 

 Whales, 571 

 Wheel animalcules, 259 

 Whelk, 334 

 Whippoorwill, 544 

 W'hite ants, 419 

 White-fish, 510 

 White matter, 114, 468 

 White nerve fibres, 85 

 Wind pipe, 482 

 Wings of insects, 408 

 Winter eggs, 132, 365 

 Wish bone, 535 

 WolfSan body, 487 



duct, 487 

 Wolves, 565 

 Wombat, 561 

 W'oodcock, 544 

 Woodpeckers, 544 

 Wool, 545 

 Worms, 237 



army, 433 



bladder, 247 



cabbage, 433 



canker, 433 



cotton, 433 



earth, 279 



flat, 238 



galley, 402 



guinea, 268 



hair, 268 



hair-neck, 267 



Worms, hook, 267 



hop, 433 



lazy, 267 



measuring, 433 



nemertean, 255 



palolo, 275 



pin, 266 



round, 263 



ship, 325 



silk, 433 



spine-headed, 268 



tape, 247 



thread, 263 



tobacco, 433 



tomato, 433 



tube, 277 

 Wrens, 544 



Xenarthra, 563 

 Xenophyophora, 180 

 Xenos, 423 

 Xerobates, 527 

 Xiphiidoe, 511 

 Xiphosura, 387 



Yellow fever, 430 

 Yoldia, 323 

 Yolk, 71 



cells, 109 



and cleavage, 142 



glands, no 



membrane, 135 



sac, 414, 489 



Zebra, 568 

 Zeuglodontia, 572 

 Zoantharia, 230 

 Zoantheae, 231 

 Zoea, 362 

 Zonula zinnii, 120 

 Zonurida?, 530 

 Zoology, general, 50 



history of, 5 

 Zoophaga, 560 

 Zoophytes, 13, 206 

 Zoospores, 169, 172 

 Zoothamnion, 197 

 Zooxanthelke, 158, 178 

 Zygapophysis, 455 

 Zygeupolia, 258 

 Zygobranchia, 333 

 Zygodactyle, 544 

 Zygomatic process, 462 

 Zygote, 138, 139 



