INDEX 



335 



Sylvius, aqueduct of {see Mesocoel) 

 Symmetry, bilateral, 82, 85 



rotatory, 85 

 Synaptene stage {see under Stage) 

 Syngamy {see Amphimixis) 

 Synizesis stage {see Stage, contraction) 

 System, arterial, 236, 243, 248 



circulatory {see Circulatory system) 



lymphatic, 246, 249 



nervous {see under Nervous system) 



reproductive, 225 



respiratory, 134, 157 



urogenital, 98, 222 



vascular {see Circulatory system) 



venous, 240 

 Systemic trunk {syn. descending aorta), 

 239, 243 



Tadpole, 19, 22, 23, 24, 25, 252 



Tail bud, 21, 23, 26, 27, 129, 132, 134, 



136, 144 

 Tail fin, 23, 26, 141, 148, 152, 157, 245, 



253, 257 

 circulation of, 28, 30 

 Taylor, 254-258 

 Tectum, 40 

 Teeth, larval, 194, 217, 244, 254, 259 



permanent, 29, 194, 217 

 Tegmentum, 40 

 Telencephalon {syn. secondary forebrain), 



158, 161, 168, 190 

 Telocoel, 161, 180, 244 

 Temperature, 26, 30 

 Testis(es), 18, 31, 32, 37, 42, 220, 221, 



231,242 

 interstitial tissue of {syn. septula), 32, 



35,36 

 Thalamencephalon {see Diencephalon) 

 Thalamus, 40. 163 

 Theca externa, 43, 44, 45, 46, 47, 70 

 Theca interna {syn. cyst wall), 45, 46, 47, 



69. 70 

 Theory {see specific theory) 

 Thickening, dorsal, 139, 165, 168 

 Thumb pad, 75, 31,55,43 

 Thymus, 198, 208, 259 

 Thyroid, 98, 135, 141. 145, 150, 158, 164, 



168, 199, 200, 201, 202, 208, 



277, 251, 259 

 Thyroid colloid, 207, 202 



Tissue, adrenal {see Adrenal tissue) 



connective, 98 



endolymphatic, 90, 158 



germinal, 14 



interstitial, 229 



of testes {syn. septula), 32, 35, 36 



somatic (.see Soma) 

 Tongue, 131, 184, 194, 200, 203, 260 

 Torus transversus, 7-^7, 161, 762, 168 

 Trabeculae {syn. trabecular cartilage), 



27^,216,2^4,249 

 Trachea, 203, 208 

 Tract, alimentary, 98 

 Triturus torosus, 106 

 Truncus arteriosus {see Aorta, ventral) 

 Tube, Eustachian {see also Pouch, hyo- 

 mandibular), 134, 178, 195,252 



neural {see Neural tube) 



olfactory {see Olfactory tube) 

 Tuberculum posterius, 135, 139, 141 , 144, 



162, 163, 165, 168 

 Tubule {see specific tubule) 

 Tunica albuginea, 32, 36 

 Twitty. V. C, 8 



Tympanic membrane {see under Mem- 

 brane 

 Tympanic ring {see Annulus tympanicus) 



U 



Ultimobranchial body {syn. supra-peri- 

 cardial or post-branchial body), 

 199. 208 



Ureter, 225, 226 



Uriniferous tubule, 32, 40, 223, 225 



Urogenital ducts {see under Duct) 



Urogenital system {see under System) 



Urostyle, 270, 210, 212 



Uterus, 49, 50, 56, 226 



Utricle, 176, 177, 192, 259 



Vas deferens {syn. Wolffian duct), 42, 



225, 226, 245 

 Vasa efferentia, 222, 225, 229, 32, 39, 40, 



42 

 Vascular system {see Circulatory system) 

 Vein, abdominal, 244 



anterior cardinal {syn. jugular vein), 



146, 150, 158, 164, 198, 238, 



241,245,248 

 brachial, 241 



