Tusks, 220 



Tympanic membrane and cavity, 73, 198 

 Tympano-Eustachian passage, 227, 246 

 Typhlops, skull, 78 



U. 



Ulna, 104 

 Ulnare, 104 

 Umbilical cord, 276 



vesicle, 12 

 Umbilicus, 276 

 Unciform bone, 109 

 Uncinate processes, 50 

 Ungulata : cervical vertebrae, 46 ; orbit, 



83 ; brain of Eocene forms, 1 51 

 Urachus, 275 

 Ureter, 299, 301, 322 

 Urethra, 276, 309 



Urinary bladder, 231, 276, 307, 308 ; of 

 Fishes, 302 



duct, 302, 314 



organs, 302 310 

 Urinogenital duct, 301, 307, 314, 316 



organs, 296 330 



sinus, 322 

 Urostyle, 42 

 Uterus, 276, 302, 311, 321, 322 



masculinus, 195 



V. 



Vagina, 302, 322 



Valves, atrio-ventrieular, 279, 287 

 of conus arteriosus, 279 

 ileo-colic, 209 

 pyloric, 209 

 semilunar, 286, 287 

 of veins, 292 

 of lymphatics, 293 

 Vane, 22 

 Vas deferens, 301, 327 



epididymis, 327 

 Vasa centralia nervi optici, 183 



efferentia, 306, 316, 327 

 Vascular system, 268 294 

 Veins : allantoic, 273, 274, 291 ; anterior 

 abdominal, 291 ; azygos, 272, 275 ; 

 branchial, 270, 279283 ; cardinal, 

 anterior and posterior, 271, 272, 275, 

 280, 291 ; caudal, 35, 270, 291 ; coro- 

 nary, 275, 287 ; ductus Cuvieri, 271, 

 273, 280 ; ductus venosus, 270, 273, 



INDEX. \\ , 345 



"J)r- 



274 ; hepatic^ 27-f, ^75, 291 ; hypo- 

 gastric, 275 ; iliac, 2/5 ; jugular, 272 

 275, 285, 292 ; lateral, 291 ; omphalo- 

 mesenteric, 270, 273, 274 ; portal 

 (hepatic), 272, 274, 291, (renal) 161, 

 291 ; postcaval, 272275, 291 ; precaval, 

 274, 275, 282, 292 ; pulmonary, 270 ; 

 renal, 275 ; suhclavian, 274, 275, 285 ; 

 subintestinal, 270, 272 ; umbilical, 276 ; 

 vertebral, 272275 ; vitelline, 270, 273, 

 274 



Velum, 246 



Velum palati, 209 



Venous system, 291 



Ventricles of heart, 269, 277, 285287 



Vertebral column, 33 47 



Vertebrarterial canal, 46 



Vesicles, cerebral, 131 



Vesicula seminalis, 307, 327 



Vestibulum oris, 212 



Villi of intestine, 211, 240 

 of placenta, 10, 274 



Viper, teeth, 216 



Vitelline membrane, 2 



Vitellus, 2 



Vocal chords, 253, 257 



Vocal sacs of Anura, 253 



W. 



Weasel, stomach, 235 

 Wolffian body, 296 

 Wolffian duct, 301, 303, 304, 322 

 Woodpecker: cervical vertebrae 46; 

 tongue, 223 



X. 



Xiphoid process, 53 



Y. 



Yolk-sac, 12 

 Ypsiloid cartilage, 93 



Z. 



Zootoca, teeth, 215 

 Zygantra, 43 

 Zygosphenes, 43 



A A 



