60 ROYAL SOCIETY OF CANADA 



157. Lysinoe Townsendiana, Loti, sp. 



158. Mesodon Columbianus, Lea, s]), 



159. Mesodon devius, (ionld. sp. 



160. Stenotrema germanum, (iould, sp. 



161. Pupa corpulenta, Morse, sp. 



162. Pupa simplex, Gould. 



163. Yertkio ovata, Say. 



164. Ferussacia subcylendrica, Linne, sp. 



165. Succinea IiAwr<[NS[i, Baird. 



166. Succinea Nuttal liana. Lea. 



167. Succinea Oregonensis, Lea. 



168. Succinea rusticana, Gould. 



169. Onchidium Carpenterl W. G. Binney. 



170. Onchidella borealis, Dall. 



171. Carychium EXKiUUM, Say, sj). 



172. LiMNvEA stagnalis. Linne, sp. 



173. LiMN-EA ampla. Mighels. 



174. LiMN.'EA palustris, Miiller. 



175. LiMNit'-A Adelin.e, Tryon. 



176. LiMNiEA HUMILIS. Sa}' . 



177. LiMN.EA NuTTALLiANA, Lea. 



178. Physa Lordi, Baird. 



179. Physa gyrina. Say. 



180. Physa ampul lacea, Gould. 



181. Physa heterostropha, Say, 84). 



182. BuLiNUS hypnorum, Linne, sp. 



183. Planorbis ammon, (rould. 



184. Planorbis trivolvis, Say. 



185. Planorbis bicarinatus, Say. 



186. Planorbis opercularis, Gould. 



187. Planorbis exacutus, Say. 



188. Planorbis parvus, Sa}'. 



189. Ancylus caurinus, Cooper. 



190. Ancylus praoilis, Tryon . 



191. Ancylus kootaniensis, Baird. 



SlPlIONAPtlA, Gray. 

 192. Siphonaria Thersites, Carpenter. 



Hept. Brit. Assoc, 1S(W, p. (i47 (August, 1864) ; and Ann. Mag. Nat. Hist., ceries :i 

 vol. xlv., p. 425 (Dec, 18f)4). 



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, etc) : 



