622 



INDEX. 



Vrodela, 382; characters of, 3S4. 

 Ursidce, 534. 

 Ursus, 535, 568. 

 Urus, 5(36. 



VACUOLES, of Protozoa, 47, 48 ; of Infu- 

 soria, 67, 70. 



Vaginicola, 70, 71. 



Vaginulus, 296. 



Valkeria, 262. 



Valvata, 295, 313. 



Varanidce, 411. 



Varanus, 411. 



Varices, 290. 



Veil, of gonophores, 83 ; of nectocalyces, 

 90 ; of naked-eyed Medusae, 96. 



Velella, 94. 



Velellidce, 95. 



Venenosa (Ophidia), 406. 



Veneridce, 284, 285; distribution of, in 

 time, 313. 



Venerupis, 285. 



Ventriculites, 64. 



Fe/ms, 285. 



Venus' girdle, 128. 



Fermes, 135. 



Vermetus, 289, 295. 



Verrucidce, 198, 203 ; distribution of, in 

 time, 219. 



Vertebra, structure of, 327-329. 



Vertebrata, 323; general characters of, 

 323-327 ; skeleton of, 327-332 ; digestive 

 system of, 332; blood of, 334; respira- 

 tion of, 335 ; nervous system of, 336 ; 

 reproduction of, 337; development of, 

 324 ; divisions of, 337. 



Vesicle, contractile, of Protozoa, 43; of 

 Amveba, 48; of Paramcecium, 67; of 

 Epistylis, 70. 



Vesicles, of Medusae, 96, 97. 



Vespidce, 250. 



Vespertilio, 548. 



Vespertilionidce, 548. 



Vibracula, 261. 



Vibrios, 35, 36. 



Viperina, 405, 407. 



Virgularia, 121. 



Visceral arches, of the embryo of Verte- 

 brates, 326. 



Vitrea (Sponges), 63. 



Viverra, 537. 



Viverridce, 536, 537. . 

 Vogtia, 90. 

 Valuta, 294. 

 Volutidce, 291, 294. 



Vorticella,66; structure of, 68 ; reproduc- 

 tion of, 69. 

 Vorticlava, 81. 

 Vulpes, 539. 

 Vulturidce, 465, 466. 



WAH, 535. 



Waldheimia, 274. 



Walrus, 531, 532, 533. 



Warblers, 461. 



Wasps, 249, 250. 



Water-hen, 448. 



Water-vascular system, of Annuloida, 135; 

 of Echinoidea, 141; of Asteroidea, 145; 

 of Ophiuroidea, 147 ; of Critioidea, 151 ; 

 of Holothuroidea, 154 ; of Scolecida, 

 158 ; of Tceniada, 159 ; of Trematoda, 

 164; of Turbellaria, 166; of Acantho- 

 cephala, 168 ; of Nematoda, 169 ; of 

 Rotifera, 174. 



Weasel, 536. 



Websteria, 133. 



Whales, 472, 473, 476, 479, 483, 504, 505. 



Wolverine, 536. 



Wombat, 492, 493. 



Wood-pecker, 457. 



Wrasse, 363. 



Wry-neck, 457. 



Xanthidia, 65. 



Xiphosura, 198; characters of, 209; dis- 

 tribution of, in time, 220. 

 Xylobius, 233. 

 Xylophaga, 286. 



ZEBRA, 515. 



Zeuglodon, 564. 



Ziphius, 564. 



Zoantharia, 111; Malacodermata, 111, 129, 



133; Sclerobasica, 113, 133; Scleroder- 



mata, 117, 124, 133. 

 Zoanthidce, 113. 

 Zoanthus, 113. 

 Zoea, 218. 

 Zonites, 313. 

 Zooid, 78. 



Zoology, definition of, 1. 

 Zootoca, 411. 



THE END. 



PRINTED BY WILLTAM BLACKWOOD AND SONS, EDINBURGH. 





