INDEX 



981 



Uterus — (Continued) 



of amphibians, 907 



of bird, albumen addition to egg in, 906 

 Utriculus, 851, 854 



V 



Vacuole, inside head of sperm, 142 



Vagina, 62 



Vaginal cycle, 92 



Vaginal plug, 31, 33 



Vagus nerve (n. x), 831 



Valerianic acid, in egg activation, 218 



Valves, of veins, 732 



Valvula foraminis ovalis, of developing 



mammalian heart, 757 

 Valvulae venosae, of developing mam- 

 malian heart, 757 

 Van Beneden, E., 214 

 Van Beneden's law, 215 

 van der Stricht, 222 

 van Leeuwenhoek, A. (1632-1723), 56 

 Vane, of feather, 571 

 Vas deferens, 19 

 ampulla of, 20 



as an organ of sperm transport, 181 

 as sperm storage organ, 30 

 Vascular buds, activities of in bone forma- 

 tion, 667 

 Vascular system, primitive, early develop- 

 ment of, 728 

 regions of, 730 

 Vegetal pole, of developing egg of higher 

 mammals, determination of, 299 

 Veins, abdominal, ventral, 740 

 allantoic, 730 



of chick embryo, 745, 746 

 azygos, of mammalian embryo, 747 

 cardinal, anterior, 727, 736, 743 

 common, 728, 736, 743 

 posterior, 728, 736, 743 

 coronary. 737 

 development of, 732 

 lateral, 730 



oblique, of mammalian heart, 747, 757 

 Vena cava, anterior (superior), of mam- 

 malian embryo, '747 

 inferior (posterior), formation of in 

 anuran amphibia, 740 

 formation of in anuran embryo, 740 

 formation of in chick embryo, 745 

 of mammalian embryo, 747 

 superior, of mammalian embryo, 747 

 Ventral constriction, 478 

 Ventral median fissure of spinal cord, 819 

 Ventral mesentery, 748 



Ventricle, first, of brain, 823 



second, of brain, 823 



third, of brain, 823 



fourth, of brain, 823 



fate of in various vertebrates, 758 



of developing heart, 747 

 Ventricular portion of heart, 750 

 Vertebrae, acoelous (amphiplatyan), 686 



amphicoelous, 685 



development of, 682, 685 



formation of, in fishes, 685 



heterocoelous, 655 



procoelous, 685 

 Vertebral column, divisions of, 683 

 Vertebral theory of skull, 536 

 Vertebrata, xv 



Vertebrate head, basic plan of, 528 

 Vertebrate hearts, early stages in morpho- 

 genesis of, 754 

 Vertebrate morphogenesis, basic features, 



chapt. 1 1 

 Vertebrates, classification of, xiv 



numbers of practicing internal fertiliza- 

 tion, 189 

 Vertical plane, of cleavage, 283 

 Vesalius, 876 

 Vesicle, seminal, 18, 20 

 Vesiculase, 33 



Vestibular ganglion, of acoustic nerve, 830 

 Vestibular glands, 802 

 Vestibules, of chick's lung, 647 

 Villi, 632, 914, 921 



primary, of trophoblast, 920 



secondary, of trophoblast, 920 

 Villus, stem, 914 

 Vincent, W. S.. 119 

 Vintemberger. P., 249 

 Virchow. R.. "Omnis Cellula e Cellula," 



281 

 Visceral arches, 527. 618. 619 



hyoid, 527, 619, 717 



mandibular, 527, 619 



development of muscles associated 

 with, 717 



posterior, muscles derived from. 718 

 Visceral (branchial) pouches, 601, 619 

 Visceral furrows, 527, 619 

 Visceral mesoderm, 506 

 Vital-staining technic. 120 

 Vitamin A, 66 

 Vitamin B, 66 

 Vitamin C, 66 

 Vitamin E, 67 



role in chick development. 67 

 Vitamins, 66 



Vitelline arteries, 727, 743 

 Vitelline duct, 911 



