INDEX 



r)4r{ 



Tissues — Cont'd 



nervous, 57 



sustentative, 56 



vascular, 57 

 Tocopherol, 176 

 Tongue, 121 

 Tonsil, 217 



Tornaria larva, 150, 484 

 Toxocara, 335 

 Toxopneustes, 212 

 Trachea, 131, 218 

 Tracheata, 394 

 Trachylina, 307 

 Trachynema, 307 

 Transition zone, 476 

 Transverse septum, 76 

 Trematoda, 323 



Trematodes, 323, 429, 437, 447 

 Trembly, 322 

 Trepang, 371 

 Treponema, 434 

 Triatoma, 280 

 Trichina, 444 

 Trichinella, 438, 444 

 Trlchinelloidea, 337 

 Trichinosis, 438 

 Trichocysts, 295 

 Trichomonas, 270, 434 

 Tricladida, 323 

 Trigeminal nerve, 137 

 Trigeminus, 92 

 Trihybrid cross, 241 

 Triploblastic structure, 326 

 Trivium, 363 

 Trochanter, 115, 420 

 Trochelminthes, 24 

 Trochlea, 114 

 Trochlear nerve, 137 

 Trochophore larva, 344, 355, 365, 372, 



382, 464, 482 

 Tropical zone, 477 

 Tropicorbis, 382 

 Tropisms, 278, 312 

 Trypanorhyncha, 324 

 Trypanosoma, 437 



cruzi, 280 



gambiense, 280 



rhodesiense, 280, 437 

 Trypsin, 69, 125, 169 

 Trypsinogen, 171 

 Tuberosities, 114 

 Tubularia, 304 

 Tundra formation, 462 

 Tunic, 151 

 Tunicata, 147 

 Turbellaria, 323 

 Twins, conjoined, 230 

 Tympanic cavity, 220 



membrane, 109 

 Tympanum, 66 



Typhlosole, 349 

 Typical animal cell, 47 



U 



Uca, 411 



Ultramicroseope, 43 



Umbo, 375 



Undulating membrane, 295 



Unit characters, 238 



Urchins, sea, 359 



Urea, 69, 81, 173, 191 



Ureter, 140, 190, 222 



Urethra, 140 



Urinary bladder, 140 



Urine, 191 



Uriniferous tubules, SI, 190 



Urochorda, 147 



Urogenital system, development, 221 



Uropods, 397 



Urosalpinx, 391 



Urostyle, 85 



Uterus, 143 



Utriculus, 94 



Vacuoles, contractile, 289 



food, 287, 294, 295 

 Vagina, 143, 223 

 Vaginal orifice, 109, 143 

 Vagus, 137 

 Valve, bicuspid, 126 



semilunar, 126 



tricuspid, 126 

 Variation, 481 



continuous, 509 



discontinuous, 509 

 Vas deferens, 145 

 Vasa efferentia, 95 

 Veliger larva, 372, 381, 482 

 Velum, 156 

 Ventricle, fourth, 136 



third, 136 

 Vertebral column of frog, 85 



of rat, 113 

 Vertebrata, 147, 157 

 Vertebrates, ancestry of, 484, 485 

 Vesalius, 32, 33 

 Vesicle, amnio-cardia, 220 



optic, 219 

 Vestibule, 121 



Vestigial structures and evolution, 500 

 Vibrissae, 1 08 

 Virchow, 53 



Visceral skeleton of frog, 84 

 Vitamins, functions of, 174 

 Vitelline membrane, 97, 211 

 Vitrina giacialis, 380 

 Viviparous animals, 193, 391 



