460 



Index. 



Turritellidas, 310. 

 Turrit opsis, 91. 

 Tylodina, 305. 



Tympanum, epithelium of, 13. 

 Type, 38. 

 Typhus, 285, 309. 

 Typhlocyba, 400. 

 Typhlobdella, 205. 

 Typhloplana, 161. 

 Typhlolepta, 160. 

 Tyrosin, 8. 



Udonella, 173. 



Ulactis, 114. 



Ulonata, 403. 



Umbellularia, 121. 



UmbUicus, 285. 



Umbo, 256. 



Umbrella, 102, 290, 294, 295, 300. 



Uncini, 28. 



Uncus, 195. 



UnduUna (Trypanosoma), 66, 68. 



Ungulina, 262. 



Ungulinidse, 270. 



Unifora, 258, 265. 



Unio, 259, 261, 265, 266, 269, 270. 



Unionacese, 262. 



Unionidse, 262. 



Univalve, 243. 



Urania, 246. 



Uraster, 134. 



Urea, 7. 



Umatellidae, 230. 



Urocentrum, 70. 



Uroceridse, 421. 



Uroglena, 57. 



Urolabes, 189. 



Uroleptus, 71. 



Uropods, 355. 



Urostyle, 72. 



Uvella, 57. 



UveUina, 54. 



Vacuoles, 4. 

 Vagabundse, 375. 

 Vaginicola, 66. 

 Vaginulus, 290. 

 Valenciennes, 6. 

 Valencinia, 3, 162. 

 Valentia, 143. 

 Valvata, 295, 309,310. 

 Valvatidse, 310. 

 Valvula, 407. 

 Valvulina, 53. 



Vampyrella, 49. 

 Vanes, 113. 

 Varieties, 39. 

 Veins, 32. 

 Velella, 99, 10 1. 

 Velellidaj, loi. 

 Velum, 89, 298. 

 Venus, 256, 270. 

 Veneracecc, 270. 

 Venerida?, 220. 

 VeretUlidm, 121, 

 VeretiUum, 121. 

 Vermes, 48, 206. 

 VermetidK, 310. 

 Vermetus, 285, 298. 

 VermiceUa, 122. 

 Verongia, 16. 

 Veronicella, 311. 

 Veroneidae, 345. 

 Vertebrae, 134. 

 Vertebrata, 11, 47. 

 Vertigo, 312. 

 Vesicula intima, 60 . 

 Vesiculariadse, 229. 

 Vespa, 420. 

 Vespidoe, 420. 

 Vexillum, 109. 

 Vibracula, 22O. 

 Vibriones, 9. 

 ViUiersia, 305. 

 Virgularia, 129. 

 Vitelhn, 6. 

 ViteUus, 36. 

 Vitrina, 312. 

 Vogt, 177. 

 Vogtia, 98. 

 VoUimann, 6. 

 Voluta, 281, 309. 

 Volutidce, 309. 

 Volva, 308. 

 Vortex, 155. 

 Vorticella, 66. 

 Vorticellidse, 69. 

 Vorticerus, 161. 

 Vorticlava, 92. 

 Vulsella, 247, 268. 



Wagener, 20, 171. 



Wagner, 183. 



Wagneria, 71. 



Waldeyer, 14. 



Waldheimia, 247. 



Waller, 2, 



Water-lungs Holothurian, 149. 



