64 UNIVALVES. 



Gyrorbis vortex Planorbis vortex, 226. 

 Helix granulata Helix sericea, 286. 

 Helix itala Helix ericetorum, 270. 

 Hippeutis nitidus Planorbis nitidus, 224. 

 Hyalinia alliaria Zonites alliarius, 249. 

 Hyalinia cellaria Zonites cellarius, 250. 

 Hyalinia crystallina Zonites crystallinus, 251. 

 Hyalinia draparnaldi Zonites draparnaldi, 248. 

 Hyalinia excavata Zonites excavatus, 252. 

 Hyalinia fulva Zonites fulvus, 253. 

 Hyalinia glabra Zonites glaber, 254. 

 Hyalinia nitidula Zonites nitidulus, 256. 

 Hyalinia nitida Zonites nitidus, 255. 

 Hyalinia pura Zonites purus, 257. 

 Hyalinia radiatula Zonites radiatulus, 258. 

 Isthmia minutissima Vertigo minutissima, 297. 

 Lauria anglica Pupa ringens, 289. 

 Lauria cylindracea Pupa umbilicata, 291. 

 Limax marginatus Limax arborum, 238. 

 Lymnophysa palustris Limnaea palustris, 211. 

 Lymnophysa stagnalis Limnaea stagnalis, 213. 

 Lymnophysa truncatula Limnasa truncatula, 214. 

 Marpessa laminata Clausilia laminata, 505. 

 Patula rotundata Helix rotundata, 283. 

 Patula rupestris Helix rupestris, 285. 

 Pirostoma bidentata Clausilia rugosa, 307. 

 Pirostoma rolphii Clausilia rolphii, 306. 

 Polita draparnaldi Zonites draparnaldi, 248. 

 Polita glabra Zonites glaber, 254. 

 Polita nitidula Zonites nitidulus, 256. 

 Polita pura Zonites purus, 257. 

 Polita radiatula Zonites radiatulus, 258. 

 Pomatia aspersa Helix aspersa, 265. 

 Pomatia pomatia Helix pomatia, 279. 

 Punctum pygmaea Helix pygmasa, 281. 

 Pupa anglica Pupa ringens, 289. 

 Pupa cylindracea Pupa umbilicata, 291. 

 Pupa muscorum Pupa marginata, 288. 

 Pupilla muscorum Pupa marginata, 288. 

 Radix auricularia Limnaea auricularia, 207. 

 Radix involuta Limnaea involuta, 210. 

 Radix peregra Limnaea peregra, 212. 

 Segmentina nitida Planorbis lineatus, 222. 

 Sphceradium edentula Vertigo edentula, 295. 

 Tachea hortensis Helix hortensis, 273. 

 Tachea nemoralis Helix nemoralis, 276. 

 Torquilla secale Pupa secale, 290. 

 Vallonia pulchella Helix pulchella, 280. 

 Velletia lacustris Ancylus lacustris, 205. 

 Vertilla angustior Vertigo angustior, 293. 

 Vertilla pusilla Vertigo pusilla, 299. 

 Vitrea crystallina Zonites crystallinus, 251. 

 Xerophila caperata Helix caperata, 267. 



