INDEX 



719 



bicuspid, 497, 498 



mitral, 497 



semilunar, 313, 497, 498 



tricuspid, 497, 498 

 Vas deferens, 165, 228, 538, 540 

 Vasa efferentia, 165, 234, 317, 318, 524 

 Vasoconstriction, 373, 495 

 Vasodilation, 373 

 Veins, frog, 315, 316 



man, 494, 495 

 Vejovis. See Scorpion 

 Velum, 230, 231 

 Vena cava, anterior, 315 



posterior, 315 

 Ventilation, 488, 489 

 Ventricle, 256, 257, 258, 497, 498, 499 

 Venules, 316, 495 

 Vertebra, 376, 379, 380 

 Vertebral column, 280 

 Vertebrates, 285-261 



comparative, 280 



historical record, 631 

 Vesalius, 8, 9, 10 

 Vessels, afferent, 212, 213 



dorsal, 192, 193 



efferent, 212, 213 



lateral, 192, 193 



segmental, 192, 193 



subneural, 192, 193 



ventral, 192, 193 

 Vestigial structure, 639, 640 



wings, 588, 589 

 Villus, 461, 466, 467 

 Virus, 31, 32 

 Visceral ganglion, 259 



mass, 256, 257 

 Vision, 396-403 



stereoscopic, 308, 424 

 Visual purple, 401 

 Vital capacity, 482 

 Vitamin A, 401, 470, 471 



B, 470, 471 

 B,„ 472 



C, 471, 472 



D, 417, 472 



K, 471, 472 

 Vitellaria, 165 

 Vitreous humor, 398 

 Vitrina glucialis, 263 

 Viviparous, 531, 532 

 Vocal cords, 478, 479 



sac, 310 

 Voice box. See Larynx 

 Volvox, 66, 67, 77 

 Vomiting. See Regurgitati 

 Von Baer, 561 

 Von Frisch, 235, 236 

 Voiiicella, 134 



Wallace, Alfred R., 651, 652 

 Waste, disposal of, 521-528 

 Water, 39, 389 



balance, 516 



moccasin, 330 

 Weight, 22 

 Whale, 346, 347 

 Whelk, knobbed, 261 



White blood cell (corpuscle). See Leucocyte 

 Whitefish embryo, 552, 553 

 Window, oval, 405 



round, 405 

 Wisdom teeth, 455 

 Wolffian duct, 318 

 Woodpecker, 332 

 Woodruff, L. L., 119 

 Worker, 228, 229 

 Wilchereria bancrofti, 182, 183 



Xiphisternum, 305 



Yolk, 173 



gland, 172, 173 



Zoogeography, 16 

 Zygote, 172, 441 



(1) 



