10 



257. Melania subularis, Lea. 



258. Melania succinulata, Anth. 



259. Melania sulcosa, Lea. 



260. Melania symmetrica, Conr. 



261. Melania symmetrica, Hald. 

 262. s Melania tabulata, Anth. 

 263. Melania taeniolata, Anth. 

 2G4. Melania Taitiana, Lea. 



265. Melania tecta, Anth. 



266. Melania tenebro-cincta, Anth. 



267. Melania tenebrosa, Lea. 



268. Melania terebralis, Lea. 



269. Melania teres, Lea. 



270. Melania textilosa, Anth. 



271. Melania torquata, Lea. 



272. Melania torta, Lea. 



273. Melania torulosa, Anth. 



274. Melania tracta, Anth. 



275. Melania trochiformis, Conr. 



276. Melania Troostiana, Lea. 



277. Melania tuberculata, Zecr. 



278. Melania turgida, Lea. 



279. Melania uncialis, Hald. 



280. Melania undosa, Anth. 



281. Melania undulata, Say. 



282. Melania valida, yln*A. 



283. Melania Vanuxemensis, Lea. 



284. Melania varicosa, Ward. 



285. Melania venusta, Lea. 



286. Melania versipellis, Anth. 



287. Melania vestita, Conr. 



288. Melania vicina, Anth. 



289. Melania virens, Anth. 



290. Melania virgata, Lea. 



291. Melania virginica, Gmel. 



292. Melania viridis, Zea. 



293. Melania viridula, Anth. 



294. Melania vittata, Anth. 



295. Melania vittata, Raf. 



296. Melania wahlamatensis, L. W. 



297. Melania Warderiana, Lea. W. 



298. Melania zonalis, Raf. 



299. Lithasia geniculata, IfaW. 



300. Lithasia lima, Conr. 



301. Lithasia nuclea, .Lea. 



302. Lithasia nupera, Say. 



303. Lithasia salebrosa, Conr. 



304. Lithasia Showalterii, Zca. 



305. Gyrotoma alabamensis, Lea. 



306. Gyrotoma ampla, Anth. 



307. Gyrotoma babylonica, Lea. 



308. Gyrotoma Buddii, Lea. 



309. Gyrotoma bulbosa, J?/^. 



310. Gyrotoma carinifera, Anth. 



311. Gyrotoma castanea, Zea. 



312. Gyrotoma constricta, Lea. 



313. Gyrotoma costata, Shuttl. 



314. Gyrotoma curta, Mighels. 



315. Gyrotoma cylindracea, Jl 



316. Gyrotoma demissa, Anth. 



317. Gyrotoma excisa, Lea. 



318. Gyrotoma funiculata, Lea. 



319. Gyrotoma glandula, Lea. 



320. Gyrotoma glans, Lea. 



321. Gyrotoma globosa, Lea. 



322. Gyrotoma Hartmanii, Lea. 



323. Gyrotoma incisa, Lea 



324. Gyrotoma laciniata, Lea. 



325. Gyrotoma ovalis, Anth. 



326. Gyrotoma ovoidea, Shuttl. 



327. Gyrotoma pagoda, Lea. 



328. Gyrotoma pumila, Lea. 



329. Gyrotoma pyramidata, Shuttl. 



330. Gyrotoma qtiadrata, Anth. 



331. Gyrotoma recta, Anth. 



332. Gyrotoma robusta, Anth. 



333. Gyrotoma salebrosa, Anth. 



334. Gyrotoma Showalterii, Lea. 



335. Gyrotoma virens, Lea. 



336. Gyrotoma weturnpkaensis, L 



337. Leptoxis affinis, Hald. 



338. Leptoxis altilis, Lea. 



339. Leptoxis ampla, Anth. 



340. Leptoxis angulata, Conr. 



341. Leptoxis Anthonyi, Redfield. 



342. Leptoxis carinata, Anth. 



343. Leptoxis carinata, DeKay 



344. Leptoxis carinata. Lea. 



345. Leptoxis carinifera, Anth. 



346. Leptoxis cincinnatiensis, Lea 



347. Leptoxis contorta, Lea. 



348. Leptoxis corpulenta, Anth. 



349. Leptoxis costata, Anth. 



350. Leptoxis crassa, Hold. 



351. Leptoxis crenata, Hald. 



352. Leptoxis dentata, Couthouy. 



353. Leptoxis dentata, Lea. 



354. Leptoxis dilatata, Conr. 



355. Leptoxis dissimilis, Say. 



356. Leptoxis elegans, Anth. 



357. Leptoxis flammata, Lea. 



358. Leptoxis formosa, Lea. 



359. Leptoxis Foreman!, Lea. 



360. Leptoxis fusca, Hald. W. 



361. Leptoxis gibbosa, Lea. 



362. Leptoxis Griffithiana, Lea. 



363. Leptoxis incisa, Lea. 



364. Leptoxis inflata, Lea. 



365. Leptoxis Integra, Say. 



366. Leptoxis isogona, Say. 



