INDEX 
Sternum, development of, 425-427 
Stigma of follicle, 25 
Stomach, 179, 313 
Stomodieum, 170, 173 
Stroma of gonads, 393; of testis, 397 
Subeardinal veins, 368, 369 
Subelavian artery, 362 
Subclavian veins, 363, 364 
Subgerminal cavity, 53, 61, 69 
Subintestinal vein, 367 
Subnotochordal bar, 416, 418 
Sulcus lingualis, 298 
Suleus 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, 
261; relation to suprarenals, 
Sympathetic trunks, primary, 
secondary, 258 
Synencephalon, 108, 153, 249 
Syrinx, 332 
256- 
406 
PASI (S 
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 
Trabecule, 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 
Tubo-tympanie cavity, 297-300 
Tubules of mesonephros, degenera- 
tion of, 380-882; 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, 
368 
Umbilieus, 144: of 
Unincubated 
of, 69 
Ureter, origin of, 384 
Urinogenital ridge, 390, 391; system, 
later development of, 378, ete. 
Urodeum, 314, 319 
Uterus, 22 
Utriculus, 291, 292 
Uvea, 273 
363; veins, 367, 
yolk-sac, 216 
blastoderm, structure 
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 
terminalis 
Ventral aorta, 121 
Ventral longitudinal fissure of spinal 
cord, 243 
Ventral mesentery, 131, 182, 343 
Vertebree, articulations of, 421; co- 
alescence of, 424; costal processes 
of, 418; hypocentrum of, 418; in- 
tervertebral ligaments of, 421; 
ossification of, 421-424; pleuro- 
centrum 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 
sinus 
Vertebral segmentation, origin of, 
412 ff 
Visceral arches, 175; clefts, 174, 
307; furrows, 174; pouches, 174; 
