INDEX. 



487 



Tympano-Eustachian recess, 163, 

 163, 273 



-hyal, 82 

 Typhlosole, 339 



ULNA, 74, 149 

 Umbilicus, 264 

 Urea, 8, 63 



Ureter, 63, 86, 156, 189, 332 

 Urethra, 124, 278 

 Urinary bladder, 86, 141, 257, 2G7 



,, sinus, 190 

 Urine, 8 



Urinogenital (see Urogenital) 

 Urocardiae, 310 

 Urochorda, 446 

 Urodela, 158, 230, 450 

 Urogenital duct, 156 

 ,, sinus, 189 



system, 122, 276 

 Urostyle, 147 

 Uterus, 123, 262 



masculinus, 124 

 Utriculus, 113, 154, 187 



T7ACUOLE, Contractile, .59, 401 

 V , Food-, 401 



,, , Permanent, 380 

 Vagina, 123 

 Valve, Eustachian, 29 



,, , Ileo-colic, 19 



,, , Longitudiuo-spiral, 143 



, Mitral, 29 



, Spiral, 174 



,, , Tricuspid, 29 

 Valves in veins, 23 



,, of shell, 325 

 Van Beneden's blastopore, 261 

 Variability, 127 

 Variation, 126, 287 

 Vasa efferentia, 156, 189, 243 

 Vascular system, 20, 142, 175, 200, 



235, 267, 312, 330, JUO 

 Vas deferens, 122, 189, 278, 320, 



343 



Vasif active tissue, 339 

 Vegetative pole, 213 

 Veins, 21, 22 



,, and arteries, 21, 30 



,, of crayfish, 314 



dogfish, 178 



frog, 145 



Veins of mussel, 331 

 ,, ,, rabbit, 23, 24 

 ,, ,, vertebrate embryos, 235, 



267 



Velum, 197 

 Ventricles of brain, 96, 101, 102, 



151, 185 



heart, 27, 142, 175 

 Vermicule, 426 

 Vermiform appendix, 16, 19 

 Vermis, 103 

 Vertebral column, 1, 66, 147, 171, 



179, 271 



,, plate, 233, 251 

 Vertebrarterial canal, 68 

 Vertebrata, 1, 133, 208, 447 

 Vesicles, cerebral, 101, 233, 251 



, optic, 273 

 Vestibule, 123 

 Vestiges, 28, 315 

 Villi of Chorion, 263 

 ,, intestine, 18 

 Visceral arches, 162, 234 



,, mass, 326 



Vitelline membrane, 229, 260, 339 

 Vomer, 81, 162 

 Vorticella, 432 



WALKING-LEGS, 304 

 Waste-material, 8 

 Weissman, 284 

 White matter, 96, 103 

 Wolffian duct, 242, 278 



,, tubules, 242 

 Work, 7, 8, 40, 45 



VIPHISTEBNUM, 68, 148 

 A Xiphosura, 442 



VOLK, 210, 245 



I -cells, 227 

 ,, -sac, 255, 262 

 ,, -sac placenta, 262 



7OANTHABIA, 435 

 ZJ Zona radiata, 260 

 Zooid, 387 



Zygapophyses, 67, 147 

 Zygocardiac, 310 

 Zygoma, 80 

 Zygote, 426 



