INDEX 



735 



Triassic, 34, 187 



Triceps m., 249, 281 



Triclad turbellarian, 7 



Triconodont, 188 



Tricuspid valve, 373, 389 



Trigeminal, 483, 484, 489, 523, 527, 609 



Trigone, 419 



Trilobites, 15, 34, 647, 651 



Tripartite, 238, 246 



Triquetrum(al), 249, 250 



Triradii, 169 



Triticeous, 340 



Tritubercular, 188 



Trochanter, 251 



Trochlea, 249 



Trochlearis chiasma, 267, 483, 510, 651 



nerve, 483, 510, 523, 625 

 Trochophore, 9, 10, 11, 12, 30 



larva, 630, 634, 639, 641 

 Trophoblast (trophoderm), 77, 78 

 Trout, 46 

 Truncus, 354 



arteriosus, 351, 353, 354, 356, 371, 373 

 Trunk, 25, 31, 607 



metameres, 626 



region, 94 



segments, 607, 610, 626 



somites, 611, 615 

 Trypsin, 326 

 Trypsinogen, 326 

 Tube(s) medullary, 637 



neural, 72, 73, 84, 85, 86, 86, 87, 88, 

 9i> 541, 558, 651 



uterine, 422 

 Tuber cinereum, 508, 547 

 Tubercle, 188 

 Tuberculum, 212 



impar, 304, 305 

 Tubular glands, 303 

 Tubules, II, 37, 98 



collecting, 417, 418, 438 



convoluted, 438 



renal, 417, 418 



uriniferous, 438 

 Tubuli recti, 426 

 Tubulo-acinous glands, 302 

 Tunica adventitia, 307, 309 



albuginea, 426, 440 



fibrosa, 588 



mucosa, 307 



muscularis, 307, 309 



propria, 307 



Tunica serosa, 309 



submucosa, 307, 309 

 Tunicata (urochordates), 18, 18, 35, 661, 



662 

 Tunicin, 18 

 Tupaia, 27 



Turbinals (conchae), 227, 575 

 Turtle, 62, 221 

 Tusk.(s), 190 

 Tympanic cavity, 231, 232, 599, 602, 606 



membrane, 599 



organs, 595 

 Tympanum, 234 

 Typhlosole, 11 



U 



Ulna, 243, 249 



Ulnar artery, 377, 392 



vein, 396 

 Ulno-volar m., 282 

 Ultimobranchial bodies, 337, 460, 459, 460 



evolution, 460 

 Ultraviolet light, 177 

 Umbilical (allantoic) artery, 53, 377, 393 



stalk, 118 



(allantoic) vein, 371, 376, 379, 382, 



384 

 Umbrella, 6 

 Uncus, 501 

 Unguis, 172 

 Ungulate, 189 

 Unicellular, 30 



algae, i 

 Unipolar, 147 

 Univalve, 13 

 Universe, ix, xi 

 Unpaired eyes, 590-593 

 Unsegmented, 9 

 Urachus, 419 



Ureter, 98, loi, 413, 415, 419, 436 

 Urethra, 413, 415, 419, 444 



cavernous, 419, 429 



membranous, 419, 429 



prostatic, 419, 429 

 Urethral folds, 444 



groove, 444 



sphincter m., 284, 419 

 Urinary, 411 



canal, 415 



duct, 407 



system, 399, 415, 43° 



