SYSTEMATIC INDEX. 



IX 



93. 

 94. 



95. 

 96. 

 97. 



99. 



Helix 

 Helix 



Helix 

 Helix 

 Helix 

 Helix 



Page 

 cereolus, Muhlf. 106 

 carpenteriana, Bid. 



febigeri, Bid, 

 pustula, Fer. 

 pustuloides, Bid. 

 leporina, Gld. 



107 

 108 

 109 

 110 

 111 



100, 

 101. 

 102, 

 103. 

 104. 

 105. 

 106. 

 107. 

 108. 

 109. 



Poli/gijrella, Blaud. 112 



Helix polygyrella, Bid. 112 



Stenotrema, Raf. 

 Helix spinosa, Lea. 

 Helix labrosa, Bid. 

 Helix edgariana, Lea. 

 Helix edvardsi, Bid. 

 Helix barbigera, Red/. 

 Helix stenotrema, Fer. 

 Helix hirsuta, Say. 

 Helix maxillata, Gld. 

 Helix gerniana, Gld. 

 Helix monodon, Rack. 



Triodopsis, Raf. 



110. Helix palliata, Sat/. 



111. Helix obstricta, Sajj. 



112. Helix appressa, Sui/. 



113. Helix inflecta, Sai/. 



114. Helix rugeli, Shutil. 



115. Helix tridentata, Say. 



116. Helix mullani, Bid. 



117. Helix fallax, Say. 



118. Helix introferens, Bid. 



119. Helix hopetonensis, Sh 



120. Helix vultuosa, Gld. 



121. Helix loricata, Gld. 



112 

 113 

 113 

 114 

 115 

 116 

 117 

 118 

 119 

 120 

 120 



123 

 123 

 125 



126 

 128 

 129 

 129 

 130 

 131 

 132 

 tUtl. 

 132 

 133 

 134 



Slesodon, Raf. 134 



122. Helix major, Binn. 135 



123. Helix albolabris, Say. 136 



124. Helix divesta, Gld. 138 



125. Helix multilineata. Say. 139 



126. Helix pennsylvanica. Green. 



140 



127. Helix mitchelliana, Lea. 141 

 12S. Helix elevata, Say. 142 



129. 

 130. 

 131. 

 132. 

 133. 

 134. 

 135. 

 136. 

 137. 

 138. 

 139. 

 140. 

 141. 

 142. 

 143. 



Helix 



Helix 

 Helix 

 Helix 

 Helix 

 Helix 

 Helix 

 Helix 

 Helix 

 Helix 

 Helix 

 Helix 

 Helix 

 Helix 

 Helix 



clarkii, Lea. 

 christyi, Bid. 

 exoleta, Binn, 

 wheatleyi, Bid. 

 dentifera, Binn. 

 roemeri, Pfr. 

 thyroides, Say. 

 bucculenta, Gld. 

 clausa, Say. 

 Columbiana, Lea. 

 downieana, Bid. 

 jejuna. Say. 

 devia, Gld. ' 

 profunda, Say. 

 sayii, Binn, 



144. 



145, 



146. 

 147. 



148. 



149. 



150. 

 151. 

 152. 



Acanthinula, Beck. 

 Helix (?) harpa, Say. 



Vallonia, Risso. 

 Helix pulchella, Mull, 



Fruticicola, Held. 

 Helix hispida, L. 

 Helix rufeacens, Penn. 

 Helix berlandieriana, Mor. 

 159 

 Helix griseola, Pfr. 



Page 

 143 

 144 

 144 

 145 

 145 

 146 

 147 

 148 

 149 

 150 

 151 

 151 

 152 

 152 

 153 



155 



156 



157 

 157 



158 

 158 

 159 



Aglaia, Albers. 

 Helix fidelis, Gray. 

 Helix infumata, Gld. 

 Helix hillebrandi, Newc, 163 



160 



161 

 161 



162 



Arianta, Leacli. 163 



Helix arrosa, Gld. 163 



Helix townsendiana, Lea. 



164 

 Helix tudictilata, ZJ/ww. 165 

 Helix nickliniana, Lea. 166 

 Helix redimita, T^". Gl. Binn. 



167 

 158. Helix intercisa, W. G. Binn. 



167 

 Helix exarata, Pfr, 168 



Helix reticulata, Pfr. 169 

 Helix ramentosa, Gld, 169 



153. 



154. 



155. 

 156. 

 157. 



159. 

 160. 

 161. 



