624 



INDEX 



Veliger, 411 



Velum : of Medusa, 315 ; of Lance- 

 let, 424 



Velum palati, 507 

 Vena cava, see Veins 

 Vent, see Anus 

 Ventral, 6 

 Ventricle, see Heart 

 Ventricles of brain, 157, 159, 424, 



459, 529, 531 

 Vermiform appendix, 515 

 Vertebrata, 219 ; general characters 



of, 418 

 Vertebra and vertebral column, 16, 



35. 36, 439, 497 

 Vertebrarterial canal, see Canal 

 Vessels, see Blood-vessels 

 Vestibule, see Urinogenital canal 

 Vestige, vestigial, 159, 364, 521 

 Vibrissae, 486 

 Villi : of intestine, 515 ; ofchorion, 



601 



Viscera, abdominal, 20, 444, 512 

 Visceral arches and clefts, 438, 



448, and see Branchial apertures 

 Visceral ganglion, 408 

 Visceral layer of peritoneum, 27, 



331 



Visceral mass, 399 



Vitelline membrane, 196, 564, 597 



Vitreous body of compound eye, 



380 

 ,, chamber and humour, 183 



Vocal cords, 144, 517 

 ,, sacs, 218 



Vomero-nasal organ, 534 



VORTICELLA : occurrence and 

 general characters, 269 ; struc- 

 ture, 269 ; reproduction, 273 ; 

 conjugation, 274 ; means of dis- 

 persal, 274 ; encystation, 275 ; 



spore-formation, 275 ; meta- 

 morphosis, 276 ; practical direc- 

 tions, 2*j8 

 Vulva, 487, 540 



w. 



W 



aste-products, 8, 66, 249 

 White matter of brain and spinal 



cord, 156, 160 

 Wolffian body, see Epididymis 



,, duct, 466, 594 

 Work and waste, 66, 148, 234 

 Worms, 349 

 Wrist, see Carpus 



x 



iphisternum, 48, 500 

 Y 



J_ ellow, cells of Earthworm, 



331, 335, 34i 

 Yolk, yolk-granules or spheres, 195, 



564, 568 ; and see under various 



types 



Yolk-cells, 200, 202 

 Yolk-plug, 201, 580 

 Yolk-sac, 471, 581 



/^oochlorella, 304 



Zooid, and see Megazooid and 



Microzooid 

 Zoology, I 



Zoophytes, see Hydroid polypes 

 Zygapophysis, 36, 498 

 Zygoma, zygomatic arch, 494, 495 

 Zygote, 197, 251, 275, 286 



RICHARD CLAY AND SONS, LIMITED, LONDON AND BUNGAY. 



152808 



