INDEX 



471 



Sternum, development of, 425-427 



Stigma of follicle, 25 



Stomach, 179, 313 



Stomodaeum, 170, 173 



Stroma of gonads, 393 ; of testis, 397 



Subcardinal veins, 368, 369 



Subclavian artery, 362 



Subclavian veins, 363, 364 



Subgerminal cavity, 53, 61, 69 



Subintestinal vein, 367 



Subnotochordal bar, 416, 418 



Sulcus lingualis, 298 



Sulcus tubo-tympanicus, 298 



Supraorbital sinus of olfactory cav- 

 ity, 285 



Suprarenal capsules, 403-406 



Sutura cerebralis anterior, 103-105; 

 neurochordalis seu ventralis, 105; 

 terminalis anterior, 105 



Sympathetic nervous system, 256- 

 261 ; relation to suprarenals, 406 



Sympathetic trunks, primary, 257; 

 secondary, 258 



Synencephalon, 108, 153, 249 



Syrinx, 332 



Tables of development, 68 



Tail-fold, 131 



Tarsus, 441 



Tectum lobi optici, 251 



Teeth, 304 



Tela choroidea, 152 



Telencephalon and diencephalon, 



origin of, 150 

 Telencephalon, later development of, 



245-249; medium, 151, 245 

 Telolecithal, 11 

 Ten somite embryo, description of, 



122 

 Testis, 395-398 

 Tetrads, 33 



Thalami optici, 154, 251 

 Thymus, 308 

 Thyroid, 178, 307 

 Tongue, 305 

 Torus transversus, 248 

 Trabecular, of skull, 428, 429; of 



ventricles, 353 

 Trachea, 331, 332 

 Trigeminal ganglion complex, 160, 



267 

 Trigeminus nerve, 267 ; nucleus (mo- 

 tor), 262, 263 

 Trochlearis nerve, 266; nucleus, 262, 



263 

 Truncus arteriosus, 198 

 Tubal fissure, 298, 301 

 Tubal ridge, 401 



Tuberculum impar (of tongue), 305 

 Tuberculum posterius, 249 



Tiibo-tympanic cavity, 297-300 



Tubules of mesonephros, degenera- 

 tion of, 380-382; formation of, 

 195-196; primary, secondary, ter- 

 tiary, 379, 380 



Turbinals, 285, 286, 431 



Turning of embryo, 133 



Tympanum, 297, 300 



Ulna, 436 



Umbilical arteries, 363; veins, 367, 



368 

 Umbilicus, 144; of yolk-sac, 216 

 Unincubated blastoderm, structure 



of, 69 

 Ureter, origin of, 384 

 Urinogenital ridge, 390, 391; system, 



later development of, 378, etc. 

 Uroda?um, 314. 319 

 Uterus, 22 

 Utriculus, 291, 292 

 Uvea, 273 



Vagina, 22 



Vagus, ganglion complex of, 161 ; 

 nerve, 268; nucleus, 262, 263 



Variability, embryonic, 64 



Vas deferens, 401 



Vasa efferentia, 398 



Vascular system, anatomy of, on 

 fourth day, 197-200; origin of, 117 



Venous system, 127, 199, 204, 205, 

 228, 363-372 



Velum transversum, 150, 248 



Vena cava, anterior, 363, 364; in- 

 ferior, 368-372 



Vena porta sinistra, 367 



Vena terminalis, 228; see also sinus 

 terminalis 



Ventral aorta, 121 



Ventral longitudinal fissure of spinal 

 cord, 243 



Ventral mesentery, 131, 182, 343 



Vertebrae, articulations of, 421; co- 

 alescence of, 424; costal processes 

 of, 418; hypocentrum of, 418; in- 

 tervertebral ligaments of, 421; 

 ossification of, 421-424; pleuro- 

 centram of, 418; stage of chondri- 

 fication of, 418; suspensory liga- 

 ments of, 421 ; 



Vertebral column, 411; condition on 

 fourth day, 414; condition on fifth 

 day, 415, 417; condition on sev- 

 enth and eighth days, 418, 420; 

 membranous stage of, 414 



Vertebral- segmentation, origin of, 

 412 ff 



Visceral arches, 175; clefts, 174, 

 307; furrows, 174; pouches, 174; 



