404 INDEX-GLOSSARY. 



Vertebrata (vertebratus, fitted with vertebra-, or joints), 3, 135, 152, 341. 

 Vesicle, Auditory (see Sacs, Auditory) Brain (Cerebral), 168, 210, 260; 



Germinal, 23, 24; Optic, 226; Umbilical v. = yolk sac. 

 Vesicula semiualis A part of the spermiduct (vas deferens) which serves 



for the storage of sperms, 17, 33, 43, 51, 62, 166, 206, 251, 333. 

 Vespertilionidre, 349. 

 Vessel, 59; Dorsal v., 59; Lateral, 59, 78; Lateral -neural, 59; Parietal 



(commissural), 59 ; Subneural, 59. 

 Vestibule, in Vorticella A ciliated depression on one side of the disc, which 



leads to the gullet, 13; in the vertebrate ear The central part of the 



membranous labyrinth, 173, 219. 



Vibrissje (vibro, I vibrate), in the Rabbit The whiskers^ 268, 271. 

 Villus (villus, shaggy hair) A minute, finger-like projection, 242, 286, 309. 

 Visceral-mass, 111. 

 Vision, mosaic, 104. 

 Visual Organs Hirudo, 76 ; Astacus, 103; Helix, 134; Scyllium, 173; 



Rana, 221 ; Columba, 256 ; Lepus, 304 ; Comparison of, 321. 

 Visual- pyramids, 103. 



Vitelline membrane The cell-wall of an ovum, 73. 

 Vitellus (vitellus, the yolk of an egg) The protoplasm of an ovum, 23, 



34, 73. 



Vitreous body, 104. 

 Viviparous Bringing forth well-developed young, as opposed to eggs, 08, 



308. 

 Vocal Cords, in the Larynx Two elastic folds, the edges of which can be 



brought parallel and thrown into vibrations, 204. 

 Vocal Sac, 175, 189. 

 Voice, 205. 

 Volition, 102, 216. 

 Voluntary, 102. 



Vorticella (dim. of vortex, a whirlpool), 339 ; 8, 11-16, 311. 

 Vulva, in the Rabbit The female urinogenital aperture, 299. 



w 



Walking, 83, 229, 268. 



Walking-legs, 87. 



Wallace, 348. 



Wallace's line, 350. 



Waste products, 10, 14, 61, 80. 



Water Flea, 23. 



Water Snail, 82. 



Weismann, 74. 



