117. Helix clausa, Say. 



118. Helix concava, Say. 



119. Helix Cooperi, W. G. B. 



120. Helix cumberlandiana, Lea. 



121. Helix demissa, Binn. 



122. Helix dentifera, Binn. 



123. Helix di vesta, Old. 



124. Helix Dorfeuilliana, Lea. 



125. Helix Edgariana, Lea. 



126. Helix Edvardsi, Bid. 



127. Helix egena, Say. 



128. Helix electrina, Gld. 



129. Helix elevata, Say. 



130. Helix Elliotti, Redf. 



131. Helix espiloca, Bland. 



132. Helix exigua, SW/n. 



133. Helix exoleta, Binn. 



134. Helix Fabricii, Beck. 



135. Helix fallax, Say. 



136. Helix fatigiata, Say. 



137. Helix friabilis, TF. G. B. 



138. Helix fuliginosa, Binn. 



139. Helix griseola, Pf. 



140. Helix gularis, Soy. 



141. Helix gularis, Say. 



var. umbilicata. 



142. Helix Gundlachi, Pf. 



143. Helix Hazardi, Bland. 



144. Helix Hindsi, Pf. 



145. Helix hippocrepis, Pf. 



146. Helix hirsuta, Say. 



147. Helix hispida, Linn. 



148. Helix hopetonensis, Shut. 



149. Helix hortensis, Mull. 



150. Helix incrustata, Poey. 



151. Helix indentata, y. 



152. Helix indentata, o//. 



var. umbilicata. 



153. Helix inflecta, Say. 



154. Helix inornata, Say. 



155. Helix interna, Say. 



156. Helix interna, Say. 



var. albina. 



157. Helix intertexta, Binn. 



158. Helix intertexta, Binn. 



var. carinata. 



159. Helix introferens, Bland. 



160. Helix jejuna, Say. 



161. Helix kopnodes, IF. G. . 



162. Helix labyrinthica, Say. 



163. Helix laevigata, Pf. 



164. Helix lasmodon, P/iiV/. 



165. Helix leporina, Gld. 



166. Helix ligera, Say. 



167. Helix limatula, Ward. 



168. 

 169. 

 170. 

 171. 

 172. 

 173. 

 174. 

 175. 

 176. 



177. 



178. 

 179. 

 180. 

 181. 

 182. 



183. 



184. 

 185. 

 186. 

 187. 

 188. 

 189. 



190. 

 191. 

 192. 

 183. 

 194. 

 195. 



196. 

 197. 

 198. 

 199. 

 200. 

 201. 

 202. 

 203. 

 204. 

 205. 

 206. 

 207. 

 208. 

 209. 

 210. 

 211. 

 212. 



213. 



214. 



Helix lineata, Say. 

 Helix major, Binn. 

 Helix maxillata, Gld. 

 Helix milium, Morse. 

 Helix minuscula, Binn. 

 Helix minutissima, Lea. 

 Helix Mitchelliana, Lea. 

 Helix mono don, Rack. 

 Helix monodon, Rack. 



var. 1. Helix fraterna, Say. 

 Helix monodon, Rack. 



var. 2. Helix Leaii, Ward. 

 Helix Mooreana, TF. G. B. 

 Helix mordax, Shutt. 

 Helix multidentata, Binn. 

 Helix multiline at a, Say. 

 Helix multilineata, Say, 



var. albina. 

 Helix multilineata, Say. 



var. rufa, unicolor. 

 Helix nitida, Mull. 

 Helix obstricta, Say. 

 Helix oppilata, Mor. 

 Helix Ottonis, Pf. 

 Helix palliata, Say. 

 Helix palliata, Say. 



var. carolinensis. 

 Helix pennsylvanica, Green. 

 Helix perspectiva, Say 

 Helix Postelliana, Bid. 

 Helix profunda, Say. 

 Helix pulchella, Mull. 

 Helix pulchella, Mull. 



var. costata. 

 Helix pustula, Per. 

 Helix pustuloides, Bid. 

 Helix Roemeri, Pf. 

 Helix Rugeli, Shutt. 

 Helix Sayii, Binn. 

 Helix sculptilis, Bid. 

 Helix septemvolva, Say. 

 Helix solitaria, Say. 

 Helix spinosa, Lea. 

 Helix Steenstrupii, Morch. 

 Helix stenotrema, Fer. 

 Helix striatella, Anth- 

 Helix subplana, Binn.. 

 Helix suppressa, Say- 

 Helix tenuistriata, Binn. 

 Helix texasiana, Mor. 

 Helix texasiana, Mor. 



var. 0, Pf. 

 Helix texasiana, Mor. 



var. . 

 Helix tholus, W. G. B. 



CO 



