302 EXPLANATION OF PLATES. 



FIG. 



257. Parmacella Olivieri. (from De Ferussac.) 

 258. pallidum, (from De Ferussac.) 



259. Limax antiquorum. 



260. Plectophorus corninus, (from De Ferussac.) 



261. Testacella Haliotoidea. 



262. Helixarion, Cuv. "> . . 



nco TJ r ,. -., ., > Vitrina, Drap. Cobresia, Haubner. 



263. Helicolimax pellucida. J 



Order, Trachelipoda. 

 Fam. Colimacea. 



Sub-genera of De Fer. 



264. Helix brevipes, Drap Helicophanta. 



265. Succinea amphibia. i 



266. patula. Amphibulima, Lam. \ Cochlohydra. 



267. Helix hsemastoma. Acarus, 



Montf. 



268. Potnatia, > Helicogena. 



269. Streptaxis contusa, Gray. 



270. Another view of the same. 



271. Anastoma depressum. 



272. Another view of the same. 



273. Helix nux-denticulata. 



> Helicodonta. 



274. Proserpina nitida. 



275. Polygyra septemvolva.. 



276. Another view of the same. 



277. Carocolla Lamarckii. i , 



278. Helix pileus. Geotrochus, Sw. 3 ' 



279. algira. Zonites, Montf. > 



280. citrina. Naninia, Gray. S 



281. epistilum Helicostyla. 



282. Bulinus rosaceus ; a. apex. 



283. — Guadaloupensis ; Bulinulus, 



Leach. V Cochlostyla. 



284. Lyonetianus. Gibbus, Montf. 



285. — lubricus. Cionella, Jeffreys. 





