51S 



IN-DEX. 



Tympanotomus, 243. 

 Types, 49. 

 Typhis, 27, *213. 



Umbo, 29, *S98. 

 Umbonal area, 404. 

 TTucini, 21. 

 Uncites, *374. 

 TJnguiculate operc, 207. 

 Ungula, 892. 

 TJngulina, *4.58. 

 Umbilicatecl shells, 205, 

 Umbrella, *^-323. 

 Unicardium, *4.57. 

 Unio, 29, 30, 33, 109, *433. 

 Unio, 497. 



Unio, distribution, 87. 

 Unionidce, *432. 

 Unionites, 468. 

 United States shells, 85. 

 Uiriculus, 317. 



VaganeUa, *479. 

 Vagina, 487. 

 Vaginella, *349. 

 Vaginulus, *300. 

 Valvata, *260. 

 Vaiiicoro, 237. 

 Varices, 13. 



Varieties, 46. 

 Varigera, *314. 

 Varix, 35. 

 Velates, *261. " 

 Velletia, 286, *302. 

 Velorita, *463. 

 Velutina, 55, *237, 

 Venericardia, *472. 

 Venerida, *472. 

 Venernpis, "476. 

 l^enilia, 337. 

 Venus, 56, «^473. 

 f crania, 171. 

 Vermetus, 7, 36, *249. 

 VeroniceUa, *S00. 

 Vertebrata, 1. 

 Verticordia, *472. 

 Vertigo, *293. 

 Vibex, *247. 

 TUliersia, 329. 

 Viquesnelia, *298. 

 Vitrina, *290. 

 Vitrinella, *265. 

 Viviparous reproduction, 



40. 

 Viviparus, 257. 

 To/a, 412. 

 Volupia, *473. 

 Voluta, 32, 55, ^230, 

 Volutella, 230. 



Volutidae, *229. 

 VolutiUthes, »230. 

 Volva, 234. 

 Volvaria, -232. 

 Volvula, *315. 

 VulseUa, 55, *416. 



Waldheimia, 19, 357, *364. 

 Waltonia, *368. 

 West African province, 69. 

 "West American shells, 77. 

 West Indian shells, 84. 

 Woodwardia, 269. 



Xanthonella, 316. 

 Xenophnrus, 254. 

 Xiphoteuthis, *-17o. 

 Xylopliaga, *506. 

 Xylotrya, *507. 



Yetus, 231. 

 Yoldia, 55, *4:8. 



Zaria, 248. 

 ZeUania, *368. 

 Zephrina, 337. 

 Zierlania, 231. 

 Zirfcjea, 505. 

 Zonites, 2S9. 

 Zua, *292. 



