INDEX 



563 



Vas deferens, of fluke-worm, 132; of 



mammals, 520; of vertebrates, 359; 



of worms, 132. 

 Vein, pulmonary, 407, 423; renal 



portal, 422. 

 Veins, hepatic, 352; pulmonary, 351 ; 



of vertebrates, 349, 350, 379. 

 Veliger, 295. 

 Velum, 97. 



Velvet, of deer horns, 537. 

 Ventricle, of brain, fourth, 354, 380; 



lateral, 354; third, 354; fifth, 514. 

 Ventricles of heart of vertebrates, 



35°- 

 Vcnus's flower-basket, 86 ; girdle, 128. 

 Vermetus, 296. 

 Vermiform appendix, 507. 

 Vermis, 517. 

 Vertebra, 333, 440, 463 ; amphicoelous, 



334, 440; heteroccelous, 464 ; pro- 



coelous, 335, 410, 441. 

 Vertebrata, 322; brain of, 354; cir- 

 culation of, 349 ; nervous system of, 



350; respiration of, 349. 

 Vertebral column, 333, 369; of birds, 



463; of frog, 410; of mammals, 493. 

 Vesicles, Polian, 165 ; racemose, 166 ; 



Tiedemann's, 166. 

 Vesicula seminalis of worms, 133. 

 Vessels, water, of flat worms, 132 ; of 



Platyhelminths, 132. 

 Vexillum, 460. 

 Vibrissa? of rabbit, 492. 

 Visceral arches, 337, 444. 

 Visceral mass of molluscs, 270. 



Visceral nerves, of Crustacea, 227 ; of 



worms, 195. 

 Viviparity, 72. 

 Voice of birds, 488. 

 Vole, 541. 



Volvox globator, 43, 44. 

 Vomer bone, of frog, 413. 

 Vorticella, 48, 52, 54; parasitic, 55. 

 Vulva, 521. 



Wallaby, 530. 

 Walrus, 526, 540. 

 Wasp, 250. 

 Weasel, 526. 

 Whale, 526, 536. 

 Wheel animalcules, 178. 

 Whelk, 296. 



Wings, of birds, 459; muscles of, 

 474 ; of insects, 244 ; veins of, 244. 

 Wombat, 529. 

 Worker ant, 253. 

 Worm, blind, 436. 



Xiphosura, 260, 263. 

 Xiphisternum, 415. 



Yolk-sac, of shark, 386. 



Zocecium, 181. 

 Zooid, 30, 91. 

 Zoology, definition of, 1. 

 Zoophytes, 90. 

 Zooxanthella, 33. 

 Zygomatic arch, 499. 

 Zygomatic process, 498. 

 Zygapophysis of frog, 410. 



