572 



INDEX 



urinary system, 369-378 



urodeles, 31, 44, 174, 187, 201, 206, 

 227, 229, 238, 247, 287, 288, 346, 

 354, 355, 440, 442, 47i, 493, 503 



urogenital sinus, 378, 387, 388, 393, 



394 



urogenital system, origin of, 64, 65 



uropygeal gland, in 



urostyle, 135 



Ursus, 87 



uterine ligaments, 390 



uterine mucous membrane, 72 



uterus, 383, 387, 388, 389, 3945 



bicornis, 390; bipartitus, 390; 



duplex, 390; masculinus, 393; 



simplex, 390 



utriculo-saccular canal, 487 

 utriculus, 487. 



vagina, 387, 389, 390, 394 



vasa aberrantia, 392 



vasa efferentia, 381, 383, 385 



vascular system, 65, 317-319 



vas deferens, 377. (See ductus def- 



erens) 



vein or veins: 318, 328; abdom- 

 inal, 342; allantoic, 322, 346, 347, 

 348; anterior cardinal, 321, 326, 

 349, 350; azygos, 344, 350, 351; 

 cardinal, 321, 326, 341; caudal, 

 327, 341, 343 5 Cuvierian duct, 322, 

 326, 346 ; duct of Cuvier, 322, 326, 

 346; ductus venosus Arantii, 348, 

 349; external jugular, 350; hemi- 

 azygos, 351; hepatic, 323, 327; 

 hepatic portal, 324, 327, 342, 

 344; iliac, 326, 346, 358; in- 

 ternal jugular, 350; jugular, 350, 

 358; lateral, 326, 346; omphalo- 

 mesenteric, 323, 347, 348; ova- 

 rian, 346; portal, 323, 327; post 

 cava, 342, 344, 345, 349; posterior 

 cardinal, 321, 326, 343, 344, 345, 



349, 358; pulmocutaneous, 354; 

 renal, 345 ; renales advehentes, 

 324, 327; renales revehentes, 324, 

 327; renal portal, 324, 327, 341; 

 spermatic, 346; subclavian, 327, 



350, 358; subintestinal, 340, 349; 

 subintestinal of Amphioxus, 528; 



veins (Continued) 

 umbilical, 322, 346, 347, 348; vena 

 anonyma, 350, 352; vena cava 

 anterior, 352 ; vena cava pos- 

 terior, 342, 344, 345, 349; vitel- 

 line, 320, 340, 347, 353; yolk, 320, 

 340, 347 



velum palati, 271 



ventral fins, 164 



ventral nerves, 436 



ventricle, 324, 353-357 



ventricles of brain, 62, 406, 411, 412 



Vermes, 258 



vertebrae, articulations of, 131 



vertebrae, development of, 124-127 



vertebral column, development of, 

 124-127 



vertebral column of birds, 132 



vetebral column, regional differen- 

 tiation of, 130 



vertebral foramina, 138 



vertebrate history, sketch of, 13-15 



vertebrates, phylogenetic tree of, 28 



vesicles of brain, 411 



vesicula prostatica, 393, 394 



vernix caseosa, 95 



vibrissae, 472 



vidian canal, 450 



villi, chorionic, 70, 71 



visceral mesoderm, 63, 66 



visceral arches, 267 



visceral muscles, 190, 192, 193 



visceral skeleton, 122, 152-162 



visceral skeleton, metamorphoses 

 of, 161 



vitreous humor, 423, 498, 501 



vomero-nasal cartilage, 483 



vomero-nasal organ, 483 



voluntary muscle, 65, 189, 190 



W 



Weber's apparatus, 486 



whale, 165, 478, 491, 505 



white blood corpuscles, 318, 362 



white matter, 428 



wish-bone, 141 



Wolffian body, 373, 386 



Wolffian duct, 64, 374, 375, 387, 392 



woodchuck, 297 



woodpecker, 283. 



