380 



INDEX. 



Veins, iliac, pig, 20 mm., 247 

 inferior maxillary, 208 

 intersegmental, 215 

 jugular, of chick, 98 



pig, 12 mm., 183, 210, 214 

 lateral jugular, 1 80 

 mesonephric, 221 



pig, 17 mm., 235 



pig, 20 mm., 251 

 omphalo-mesaraic, 93, 141 



chick, 98, 285 

 peripheral, of limbs, 247 

 portal, pig, 9 mm., 221 

 posterior cardinal, 2OI 



pig, 20 mm., 245 

 pulmonary, 20 1 

 subcardinal, pig, 9 mm., 226 

 subclavian, pig, 12 mm., 196 



pig, 17 mm., 234 

 umbilical, early human, 136 



pig, 9 mm., 226 



pig, 12 mm., 204 



pig, 17 mm., 239 

 vitelline, pig, 17 mm., 239 

 Ventral roots, 186 



zone, of medulla, pig, 9 mm., 227 



of medulla oblongata, 211 



of medullary canal, 74 



pig, 12 mm., 184 

 Ventricle, fourth, of brain, 175 

 chick, 290 

 pig, 24 mm., 266 

 lateral, pig, 12 mm., 186 



pig, 20 mm., 256 

 of heart, pig, 12 mm., 199 

 Vertebrae, pig, 12 mm., 202, 215 



pig, I? mm -, 2 33 

 pig, 20 mm., 242 

 pig, 24 mm., 266 

 Vertebral arch, pig, 20 mm., 244 

 Vertebrate type, 18 



modifications of, 22 



Vesicles, amnio-cardiac, chick, 295, 300 

 blastodermic, 60 

 in alcohol, 306 

 rabbit, 305 



five days, 306 

 six days, 308 

 seven days, 309 

 definition of, 37 

 optic, chick, 276, 277, 297 

 primary, 73 



Vesicles, primary cerebral, 73 



chick, 273 

 segmental, 8l 



Villi, chorionic, 320, 327, 333 

 early human, 135 

 general account, 345 

 of gibbon, 127 

 origin of, 117, 124 

 mesothelial of allantois, 222, 253 

 Vitelline membrane, defined, 40 

 Vitreous humor, 260, 263 

 pig, 24mm., 263 



W. 



Weigert's hematoxylin, 369 

 Weismann's hypotheses, 41 

 Winslow, foramen of, 205 

 Wolffian bodies, 202 



division of, into two parts, 25 1 



general account, 102 



morphology, 102 



pig, 9 mm., 219, 225 



pig, 17 mm., 235 



pig, 20 mm., 251 

 duct, chick, 287 



pig, 9 mm., 225 



pig, 17 mm., 238 

 tubules, pig, 9 mm , 225 



Y. 



Yolk- cavity, 66 

 Yolk-sac, 85 



anlage of, 78 



human, 89, 320 



structure of, 354 



of gibbon, 127, 128 

 Yolk-stalk in umbilical cord, no, 352 



Z. 



Zenker's fluid, 363 



Zona pellucida, defined, 40 



rabbit, 309 

 Zones of His, 74 



pig, 9 mm. , 217 

 pig, 12 mm., 185, 1 86 

 parietal, 79 

 segmental, 79 



