INDEX. 



439 



Stenogyra, 191. 

 Stenogyra decollata, 192. 

 gracillima, 195. 

 octona, 196. 

 octonoides, 194. 

 subula, 195. 



Stenostoma convexa, 432. 

 Stenotrema, 290. See Helix. 

 Stenotrcma convexa, 432. 

 Striatura, 119. 

 Strobila, 258. 

 Strophia, 219. 

 Strophia incana, 220. 

 Succinea, 414. 

 Succinea amphibia, 430. 



aperta, 430. 



aurea, 422. 



avara, 420. 



campestris, 426. 



cingulata, 21. 



citrina, 419. 



Concordialis, 418. 



Decampii, 417. 



effusa, 429. 



Forsheyi, 431. 



Gabbii," 429. 



Greerii, 424. 



Groenlandica, 423. 



Grosvenorii, 431. 



Haleana, 430. 



Halei, 430. 



Hawkinsii, 427. 



Haydeni, 415. 



Higginsi, 418. 



infiata, 427. 



lineata, 420, 424. 



lutcola, 419. 



Mooresiana, 430. 



munita, 419. 



Nuttalliana, 428. 



obliqua, 423. 



oblonga, 430. 



Orcgonensis, 428. 



ovalis, 417. 



pellucida, 430. 



putris, 430. 



retusa, 416. 



rusticana, 427. 



Salleana, 429. 



Sillimani, 416. 



Stretchiana, 422. 



Texasiana, 419. 



Totteniana, 425. 



unicolor, 427. 



vermcta, 421, 430. 



Vcrrilli, 422. 



Wardiana, 421. 



Succinea Wilsoni, 431. 



Tachea, 377. 

 Tebennophorus, 179. 

 Tebennophorus bilineatus, 184. 



Caroliniensis, 181. 



dorsalis, 184. 



Testacella , 87. 



haliotoidca, 87. 

 Testacina, 153. 

 Toxostoma globularis, 432. 

 Toxotrema complanata, 432. 



globularis, 432. 

 Triodopsis, 301. See Helix. 

 Triodopsis lunula, 308, 432. 

 Trophodon, 432. 

 Turricula, 349. 



Urcinella, 153. 



Vaginulus flexuolaris, 244. 

 floridanus, 241. 

 fuscus, 244. 

 oxyurus, 244. 

 quadrilus, 244. 

 Vallonia, 343. See Helix. 

 Veronicella, 240. 

 Veronicella Floridana, 241. 



olivacea, 243. 

 Vertigo, 213. 

 Vertigo Bollesiana, 215. 



Gouldii, 214. 



miliuin, 214. 1-JT 



ovata, 216. 



pentodon, 200. 



rupicola, 208. 



simplex, 219. 



tridentata, 217. 



ventricosa, 218. 

 Vitrina, 135. 

 Vitrina Americana, 137. 



Angelica;, 137. 



exilis, 138. 



latissima, 136. 



limpida, 136. 



obliqua, 139. 



pellucida, 136. 



pfeifferi, 138. 



Xolotrema clausa, 307. 

 lunula, 432. 

 triodopsis, 432. 



Zilotea, 153. 

 Zolotrcma, 432. 

 Zonites, 94. See Helix. 



