306 



BULLETIN 181, UOTTED STATES NATIONAL RIUSEUM 



sumiclirasti, Aperostoma, 204, 209, 211, 



281, 289. 

 superbum, Farcimen, 34, 35, 284. 

 sutiirale, Cyclostoiua, G8, 69. 

 suturalis, Cyclojamaicia, 68, 69, 70, 285. 

 taylori, Potoria, 118, 119, 287. 



Ptychocochlis, 83, 89, 286. 

 texturatum, Cyclostoma, 186, 276. 

 texturatus, Amphicyclotus, 184, 186, 281, 

 288. 



Cyclopborus, 186. 

 thielei, Neocyclotus, 72. 

 Tomocyclus, 3, 142. 



constrictus, 148, 145, 281, 287. 



copanensis, 143, 147, 281, 2S7. 



gealei, 142, 143, 147, 281. 287. 



suatemalensis. 143, 144, 281. 287. 



simulacrum, 142, 143, 144, 146, 147, 

 281, 287. 



siphonis, 143, 145, 146, 281. 

 toroense, Crocidopoma, 40, 284. 

 torrei, Farcimen, 20, 284. 



Megalomastoma, 20. 

 tortum, Cyclostoma, 4, 2f5, 38. 



Farcimen, 4, 5, 26, 284. 



Megalomastoma, 5, 6. 

 tortus. Turbo, 4, 5. 26. 

 translucida, Potcria, 272. 

 ti'anslucidum. Aperostoma, 186, 179, 268, 

 269, 272, 279, 289. 



Cyclostoma, 272. 

 translucidus, Cyclofus, 271, 272. 



Neocyclotus, 272. 

 trinitense, Aperostoma, 136, 288. 269, 



271, 287, 289. 

 trinitensis, Cyclotus, 136, 271. 



Neocyclotus, 271. 



Poteria, 186, 271. 

 truncatum, Cerion, 45. 

 tryoniana. Poteria, 116, 286. 

 tryonianum, Aperostoma, 116. 

 tucma, Adelopoma, 148, 279, 291. 

 Turbo flavidus, 45. 



jamaicensis, 82, 93, 105, 106, 112. 



tortus, 4, 5, 26. 

 turquinoense, Farcimen, 5, 6, 283. 

 umbilicatum, Aperostoma, 221, 224, 225, 



226, 279, 289. 

 Underwoodi, Amphicyclotus, 176. 



Barbacyclus, 175, 176, 178, 280, 288. 



underwoodi, Cyclopborus, 176. 

 ungula, Farcimen, 5, 7, 9, 10, 283. 



Megalomastoma, 9. 

 utriaense, Aperostoma, 222. 240, 241 



280, 290. 

 valerioi, Aperostoma, 205, 213, 215, 280, 



289. 

 Valvata piscinalis, 141. 

 varians, Cyclostoma, 86, 92, 93, 127, 128. 



Cyclotus, 86. 



Neocyclotus, 86. 



Ptychococblls, 83, 86, 286. 

 vasconesi, Cyclopborus, 156. 



Lagocyclus, 154, 156, 280, 287. 

 vendreysi, Ptycbococblis, 82, 84, 102, 286. 

 venezuelense, Aperostoma 222, 247, 248 



282. 290. 

 ventricosa, Cyclostoma, 30. 

 ventricosum, Farcimen, 30, 82, 284. 

 veracocbauum, Aperostoma, 221, 229, 



282. 289. 

 verruculosum, Cyclostoma, 51. 



Megalomastoma, 51, 284. 

 vesconesi, Ampbicyclotus, 156. 



Cyclopborus, 156, 160. 

 vinalense, Farcimen, 32, 33, 284. 

 vincentina, Poteria, 133. 

 vincentinum, Aperostoma, 133, 286. 

 volvulus, Cyclopborus, 124. 



Cyclostoma, 124. 

 vortex, Crocidopoma, 62, 63, 65, 285. 



Cyclostoma, 68. 



Cyclotus, 63. 

 walkeri, Aperostoma, 174. 



Cyrtotoma, 169, 174, 281, 288. 

 welcbi, Poteria, 116, 118, 119. 286. 



Ptycbococblis, 83, 88, 285. 

 westmorelandensis, Cvclopilsbrya, 71, 

 72, 295. 



Cyclotus, 72. 



Neocyclotus, 72. 

 wetmorei, Aperostoma, 203, 279, 291. 

 wrighti, Crocidopoma, 41, 42, 284. 



Farcimen. 12, 13, 283. 

 yallabsensis, Poteria, 116, 123, 287. 

 yunquense, Farcimen, 6, 283. 

 zigzag, Cyclotus, 90. 



Neocyclotus, 90. 



Ptvcbococblis, S3, 90, 286. 



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