724 



INDEX 



Tryblidiacea, 300 



Ttypanosome, 70 



Trypetidae, 265 



Trypsin, 517, 521 



Tsetse fly, 70, 262 



Tuatara, 407 



Tube feet, 304, 306, 307, 309, 



310 

 Tube-dwelling Chaetopterus, 188 

 Tubercles, 309 

 Tubifex, 190 

 Tubipora, 128 

 Tubular glands, 540 

 Tubule, 172 



collecting, 339 

 Tubulidentata, 464, 496 

 Tularemia, 262 

 Tumbler, 456 

 Tunic, 321, 322 

 Tunica propria, 518 

 Tunicate, 316, 321, 322 

 atrial cavity, 323 

 circulatory system, 323 

 larva, 323 



pharyngeal sac, 323 

 siphon, 323 

 tubular heart, 323 

 velum, 323 

 Turbatrix, 153 

 Turbellaria, 134, 138, 147 

 Turbot, 394 

 Turdidae, 462 

 Turkeys, 461 

 Turtle, 325, 406-413 

 carapace, 408 



circulatory system, 408, 409 

 classification, 429 

 digestive system, 406 

 external features, 406 

 internal structure, 409 

 nervous system, 411 

 plastron, 408 

 respiratory system. 409 

 sense organs, 411 

 skeleton, 406 

 urogenital system, 410 

 Tusk shell, 282 

 Tussock moths, 264 

 Twins, 596 



conjoined, 597, 598 

 fraternal, 596 

 identical, 596, 597 

 Siamese, 598 

 Twisted-wing insect, 229 

 Tympanic cavity, 548 



membrane, 233, 527, 355, 548 

 ring, 347 

 Tympanum, 231, 351, 549 

 Typhlosole, 172, 174, 175, 286 

 Typhus fever, 262 

 Tyrannidae, 462 

 Tyrannus, 462 

 Tyrant flycatcher, 456 



U 



Uintatherium, 491, 492 

 Ulna, 437, 501 

 Ultraviolet light, 524 

 Umbilical cord, 477 

 Umbo, 284 



Uncinate process, 435, 437 

 Underfur, 473 

 Unguligrade posture, 476 

 Unicellular glands, 540 

 Unicorn, 652 

 Unio, 301 



Uniramous appendage, 203 

 Universal symmetry, 88 

 Ureter, turtle, 410 



man, 342, 539 

 Urethra, 341, 342. 539 

 Urinary, bladder, 341, 342 



duct, 341 

 Urine, 339 



Uriniferous tubules, 339 

 Urochordata, 316, 321 

 Urogenital system, cat, 471 



dogfish shark, 373 



fish, 385 



frog, 341, 342 



lamprey, 364 



man, 342 



turtle, 410 

 Uroglenopsis, 47, 74, 75 

 Uropod, 200, 201, 202 

 Urosalpinx, 293 

 Urostyle, 330, 343, 345 

 Uterus, 140, 144, 150, 151, 152, 



154, 341, 342 

 Utricle, ear, 548 



Vacuole. 21, 22, 108 



food, 58, 71, 107 

 Vagina, 144, 150, 151, 342 

 Vagus nerve, 351, 353, 546 

 Valves, 283, 336, 530 

 Vampire bat, 483 

 Van Leeuwenhoek, 654 

 Vane, 434, 435 

 Varanidae, 407 

 Varanus, 415 

 Variation, species, 608 

 Variety, animal life, 2 

 Vas deferens, 151, 172, 173, 180, 



202, 341, 564 

 Vas efferens, 172, 180, 341, 342 

 Vascular system, 168 



tissue, 85, 86 

 Vastus externus, 347 



internus, 347, 348 

 Vectors, 262, 275 

 Vegetal pole, 357 

 Veins, 233, 234, 287, 320 



frog, 337, 338 



Veins {Cont.): 



man, 531, 532 

 Velar tentacles, 318 

 Veliger, 289, 290 

 Velum, 118, 120,245, 289, 318 

 Vena cava, frog, 336, 338 



man, 530, 532 

 Venom duct, 417 



gland, 417 

 Venomous reptiles, 422-426 

 Vent, 439 

 Ventral aorta, 319 

 cord, 172, 226 

 fin, 316, 318 

 nerve, 152 

 root nerve, 319, 352 

 siphon, 283 

 suckers, 139, 140, 356 

 Ventricle, 336, 338, 530, 533 

 brain, 351 

 optic, 351 

 Ventriculus, 235 

 Venules, 531 

 Venus, 301 

 Venus's flower-basket, 93, 100 



girdle, 131 

 Vermiform appendix, 517 

 Vermis, brain, 472 

 Vertebra, 345, 465, 466, 501 

 caudal, 465, 466 

 cervical, 465, 466, 501 

 lumbar, 465, 466, 501 

 sacral, 465, 466, 501 

 thoracic, 465, 466, 501 

 Vertebral column, 343, 345, 500 

 Vertebrata, 8, 316, 323 

 brains, 544 

 classification, 324 

 distribution, geologic eras, 616 

 internal skeletons, 500 

 jawless, 616 

 nervous system, 544 

 sense organs, 544 

 structural plan, 324 

 Vertebrate, classes, 606 

 coordination, 544 

 family tree, 317 

 generalized, 325 

 heart evolution, 340 

 jawless, 317 



relations to invertebrates, 60*1 

 structure, 324 

 Vertex, 230, 232 

 Vesalius, 653 

 Vcspidae, 265 



Vessels, afferent intestinal, 176 

 dorsal, 176 



efferent intestinal, 176 

 lateral neural, 176 

 nephridial, 176 

 parietal, 176 

 segmental, 176 

 subintestinal, 176 



