324 



EXPLAKATIOIf OP PLA.TES. 



Fam. Bullseana. 



247. Bulla Hanleyi. Akera, Miiller. 



248. aperta. JBullsea, Lam. 



249. Thalassiarclii. Aplustrum, Schum. 



250. Naucura. Atys, Montf. 



251. lignaria. Scaphander, Montf. 



252. — — Ampulla. 



253. lineata. 



Fam. Aplysiacea. 



254. Aplysia Petersoni. 



255. Dolabella Eumphii. 



Fam. Limacinea. 



256. Parmacella calyculata, Cryptella. Webb. 



257. Parmacella Olivieri, (from De Perussac.) 

 258. palliolum, (from de Eerussac.) 



259. Limax antiquorum. 



260. Plectopborus corninus, (from de Perussac.) 



261. Testacella Haliotoidea. 



262. Helkarion, Cut. J ^.^^.^^^ ^^^^ ^.^^^^^.^^ Haubner. 



263. Helicolimax pellucida . 3 



Order, Tbachelipoda 

 Fam. Colimacea. 



264. Helix brevipes, Drap. . • • • • 



265. Succinea amphibia 7 



266. cucullata. Amphibulima, Lam. 5 



267. Helix hsemastoma, Acarus, 



Montf. 



268. Pomatia, 



269. Streptaxis contusa, Gray. 



270. Another view of the same. 



271. Tomogerus depressum. 



272. Another view of the same. 



273. Helix nux-denticulata. 



274. Proserpina nitida. 



275. Polygyra septemvolva. 



276. Another view of the same. 



Suh-genera of De Per. 

 . . Helicophanta. 



( 



Cochlohydra. 



Helicogena. 



Helicodonta. 



