INDEX 



325 



thyroid gland, 136, 173, 214, 244, 290 



tibia, 204, 270 



tibiale, 270 



tick, 128 



tongue, 197, 275 



torpedo ray, 167 



trabecula, 160, 188, 260 



trachea, 118, 119, 123, 275, 279 



tracheoles, 120 



transverse process, 198, 257 



trapezoid, 268 



trapezium, 268 



Trematoda, 45 



trichocyst, 11 



trigeminal nerve, 177, 217, 296 



Trilobita, 91 



trochlear nerve, 176, 217, 296 



trochophore larva, 73, 89 



Trochozoa, 60, 61, 76, 91 



trophoblast, 249 



trophonucleus, 28 



trophozoite, 25, 26 



Trypanosoma, 28 



tse-tse fly, 29, 127 



TurbeUaria, 45 



turbinal, 266 



tympanic, 264 



typhlosole, 66, 79 



ulna, 204, 268 



ulnare, 204, 268 



umbilical cord, 194, 244, 254 



umbo, 62 



unciform, 268 



undulating membrane, 10, 13 



Unionidae, 61 



ureter, 68, 108, 189, 190, 306, 308 



urethra, 309 



urinogenital canal, 207, 309 



organs, 185, 221, 305 

 Urochorda, 132 

 uropod, 94, 98 

 urostyle, 199 



uterus, 307, 309 



masculinus, 310 

 utriculus, see auditory organ 



vacuole, 3 



vagina, 307, 309 



vagus, 179, 218, 297, 310 



valves (heart), 286 



vasa efferentia, 187, 223, 224, 306 



vascular system, Anodonta, 68 



Lumbricus, 82 



Nephrops, 103 



Blatta, 120 



Amphioxus, 139 



Raia, 168 

 Rana, 209 



vascular system, chick, 246 



Lepus, 282 



vas deferens, 48, 55, 84, 108, 122, 



188, 224, 306, 309 

 vibrissae, 256 

 veins, Amphioxus, 139 



Raia, 172 



Rana, 212 



Lepus, 289 

 velar tentacles, 135 

 velum (Molluscan larva), 62 

 velum (Amphioxus), 135, 152 

 veliger larva, 74 



vena cava, see anterior, posterior 

 ventral aorta, 139, 170, 210 



fin, 133, 134, 154, 156 

 ventricle, see heart, brain 

 vermiform appendix, 278 

 vertebra, see vertebral column 

 vertebral artery, 172, 210 

 vertebral column, Raia, 158 

 Rana, 198 



Lepus, 257 



verumontanum, 309 

 vestibule (Vorticella), 13 



(Lepus), 309 

 villi, 277 



visceral arch, 161, 261 



nerve, 185, 304 

 viteUine artery, 169, 246, 284 



vein, 168, 246, 284 

 vocal cords, 280 

 vomer, 196, 201, 265 

 Vorticella, 13, 21, 22 

 vulva, 256, 307, 309 



warm blood, 282 



wheel organ, 135, 149 



windpipe, 275, 279 



wing, 116, 123 



wireworm, 114 



WolfiSan body, 189, 223, 308 



Wolffian duct, 189, 223, 305 



Xanthella, 35 

 xiphisternum, 203, 260 

 Xiphosura, 91 



yellow cells, 81 



yolk sac, 194, 243, 248 



placenta, 253 



zoea larva, 109, 110 

 zooid, 40 

 zoophyte, 30 

 zygapophysis, 198, 258 

 zygomatic arch, 264 

 zygote, 28 



