INDEX. 



401 



Somatopleure, 7, 82 

 chick,. 187, 211 

 pig, 12. o mm., 282, 286 



20.0 mm., 318 

 Somites, chick, 192, 207, 212 

 defined, 84 

 differentiation, 85 

 general morphology, 2 

 origin, 84 

 secondary, 86. 



pig, 6.0 mm., 246, 250 

 Spermatozoon, 33 



entrance into ovum, 38 



mouse, 163 

 Spinal cord, 73 



chick, 205 

 differentiation, 75 

 pig, 6. o mm.. 246 

 12 .o mm., 269 

 17.0 mm., 305 

 20 . o mm., 312 

 Splanchnocele, 84, 87 



pig, 12.0 mm., 287 

 Splanchnopleure, 7, 82 

 chick, 187, 203, 211 

 pig, 12.0 mm., 288 

 Spongioblasts, 73 

 Staining, methods of, 381 

 Stigma of Graafian follicle, 35 

 Stomach, origin, 57 



pig, 12 .o mm., 288 

 Stomodaetini, 184 

 Streak, primitive, 48 



rabbit, 170173 

 Striae acusticae, 268 

 Subzonal layer, 44 



Suprarenal capsule, pig, 24.0 mm., 337 

 Surface and mass, 20 

 Sympathetic system, cervical, 279, 283 

 pig, 17.0 mm., 305, 308 

 20 . o mm., 314 



Telencephalon, origin, 74 



Teleosts, 8 



Testis, 322 



Tetrads, 36 



Thyroid gland, origin, 63 



pig, 12.0 mm., 277 

 20. o mm., 315 

 Tissue, classification of, 19 

 Tongue, pig, 12.0 mm., 293 

 20. o mm., 311, 327 

 Tonsil, origin, 63 

 26 



Trachea, pig, 12.0 mm., 2 76, 2 79, 280 



20. o mm., 314, 317 

 Trigeminal tract, 263, 297 

 Trophoblast, (footnote) 44 

 Trophoderm, degeneration, 366 



early stage described, 364 



general account, 114 



origin, 47 

 Tubal band, 318 

 Tuber cinereum, 292 

 Tunica albuginea, 322 



vasculosa lentis, 331, 333 

 Tunicata, 9 



Umbilical cord, amnion from, 115 

 general account, 115 

 human, at seven months, 345 

 ectoderm of, 375 

 mesoderm of, 374 

 study of, 372 



opening, pig, 9.0 mm., 253 

 Umbilicus, pig, 9.0 mm., 254 

 Unguiculates, 8 

 Ungulates, 8 

 Urodela, 8 

 Urogenital ducts, 5 



general account, no 

 ridge, of vertebrates, 5 

 Uterus, general histology, 339 



human, pregnant, two stages of, 124 

 menstrual changes, 339 

 pregnant, two stages of, 341 

 at three months, 343 

 at seven months, 345 

 Uvea, 332 



Valves, Eustachian, 282, 301 

 sinistral, 301 

 Thebesian, 282 

 Veins, anterior cardinal, origin, 102 



pig, 12.0 mm., 268 

 cardinal, chick, 200, 207, 210 



pig, 12.0 mm., 264, 268, 28; 

 17.0 mm., 306 

 20. o mm., 317 

 common, origin of, 98, 103 



pig, 12 .o mm., 282 

 primitive arrangement, 98 

 iliac, 320 



inferior cava, origin, 104, 257 

 jugular, 279 

 maxillary, 293 



