60 ROYAL SOCIETY OF CANADA 
157. LYSINOE TOWNSENDIANA, Lea, sp. 
158. Mesopon CoLumBranus, Lea, sp. 
159. MESODON DEVIUS, Gould, sp. 
160. STENOTREMA GERMANUM, Gould, sp 
161. PupA coRPULENTA, Morse, sp. 
162. Pupa SIMPLEX, Gould, 
163. VERTIGO OVATA, Say. 
164. FERUSSACIA SUBCYLINDRICA, Linne, sp. 
165. SucoiNEA Hawkinsrr, Baird. 
166. SucciNEA NUTTALLIANA, Lea. 
167. SUCCINEA OREGONENSIS, Lea. 
168. SUCCINEA RUSTICANA, Gould. 
169. ONncxrpiuM CARPENTERI, W. G. Binney. 
170. ONCHIDELLA BOREALIs, Dall. 
171. CARYCHIUM EXIGUUM, Say, sp. 
172. Liunaa sTAGNALIS, Linne, sp. 
173. Limnawa ampia, Mighels. 
174. Limnaa pauustris, Müller. 
175. LIMNÆA ADELINÆ, Tryon. 
LIMNÆA HUMILIS, Say. 
LIMNÆA NUTTALLIANA, Lea. 
PaysA Lorpbi, Baird. 
PHYSA GYRINA, Say. 
80. PHysA AMPULLACEA, Gould. 
181. PHYSA HETEROSTROPHA, Say, sp. 
182. BuLtinus Hypnorum, Linne, sp. 
183. PLANORBIS AMMON, Gould. 
184. PLANORBIS TRIVOLVIS, Say. 
185. PLANORBIS BICARINATUS, Say. 
186. PLANORBIS OPERCULARIS, Gould. 
187. PLANORBIS EXACUTUS, Say. 
188. PLANORBIS PARVUs, Say. 
189. ANCYLUS CAURINUS, Cooper. 
190. ANCYLUS FRAGILIS, Tryon. 
191. ANCYLUS KOOTANIENSIS, Baird. 
. 
ol ay 
Dat oa 
» CO 
SIPHONARIA, Gray. 
192. SIPHONARIA THERSITES, Carpenter. 
Rept. Brit. Assoc., 1863, p. 647 (August, 1864) ; and Ann. Mag. Nat. Hist., series 3, 
vol. xiv., p. 425 (Dec., 1864). 
Common on all our coasts near high water mark on rocks and 
sea-weed. Dr. Dall writes (‘ Remarks on the genus Siphonaria,’ Amer. 
Journ. Conch., vol. vi. (1870), p. 30, ete): 
