INDEX. 



485 



373; sides of, 373; roof of, 374 



376 



Third nerve of chick, 129 

 Third ventricle of mammalia, 372 

 Throat of rabbit, formation of, 



Thyroid body, of chick, 181 ; 



mammalia, 418 

 Tibia of chick, 234 

 Tongue of chick, 282 

 Trabeculae of chick, 236, 239 241 

 Trachea of chick, 176, 177 ; mam- 

 malia, 418 

 Tuber cinereurn, 373 

 Turbinal bones of chick, 246 

 Tympanic cavity of chick, 166 ; 

 membrane of chick, 166 ; cavity 

 of mammalia, 397, 418; mem- 

 brane of mammalia, 397 



U. 



Ulna, of chick, 234 



Umbilical, arteries (nee Allantoic); 

 veins (see Allantoic veins); vesi- 

 cle of mammals (see Yolk-sac) ; 

 stalk of chick of third day, 113; 

 cord, 351 



Urachus, 351 



Ureter of chick, 219; mammalia, 



4i7 



Urethra, mammalia, 417 



Urinogenital organs of mam- 

 malia, 414 417; sinus of mam- 

 malia, 415417 



Uterine crypts, 350 



Uterus, mammalia, 415 



Utriculus of mammalia, 393 398 



Uvea of iris, chick, 144 



V. 



Valve of Vieussens, of birds, 369 ; 



of mammals, 370 

 Vagina mammalia, 415 

 Vagus nerve (see Tenth nerve) 

 Vasa efferentia and recta mam- 

 malia, 414 



Vascular system of chick, 224 

 230; of second day, 89 94, 102 



106 ; of third day, 167 170 ; 

 mammalia, 406 413 



Vascular area: of blastoderm of 

 chick, 27; of third day, no 

 113; of rabbit's ovum, forma- 

 tion of, 326 



Vas deferens : of cock, 224 ; mam- 

 malia, 415 



Velum medullas anterius (see 

 Valve of Vieussens) ; posterius, 



37 

 Vermiform appendix, mammalia, 



419 

 Vena cava, inferior, of chick, 228, 



285 290 ; mammalia, 409 



413 



Venae cavae, superior, of chick, 

 286 290 ; of mammalia, 409 



4i3 



Venae advehentes of chick, 227, 

 287 289 ; revehentes of chick, 

 227, 287 289 



Vena terminalis (see Sinus termi- 

 nalis) 



Venous system: of chick, 226 

 229, 283 290,301 303; mam- 

 malia, 409 413 



Ventricles of brain of chick of 

 second day, 102; of mammals, 

 117, 121 122; of chick, 229 



Ventricular septum, chick, 230, 



257 



Vertebrae of chick, primary, 205 

 208 ; permanent, 205 208 ; 

 bodies of, 207 209 



Vertebral arches, osseous, of 

 chick, 207, 210; mammalia, 

 409 



Vertebral artery of chick, 295 

 298 



Vertebral column, of chick, 205 

 208 ; membranous, 205 208 ; 

 secondary segmentation of, 205 

 208 ; explanation of do., 205 

 206 ; of mammalia, early de- 

 velopment, ossification of, 400, 

 401 



Vertebrate animal, general struc- 

 ture of, 39 



Vesicle of third ventricle (see 

 Thalamencephalon) 



