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.) 



26 1 . Testacella Haliotoidea. 



262. Helixarion, Cuv. } . 



nco „ ,. ,. ni .-, } Vitrma, Drap. Cobresia, Haubner. 



263. Helicohmax pellucida. ) 



Order, Trachelipoda. 

 Fam. Colimacea. 



Sub-genera of De Fer 



264. Helix brevipes, Drap Helicoplianta. 



265. Succinea amphibia. i 



266. patula. Amphibulima, Lam. \ Cochlohydra. 



267. Helix hgemastoma. Acarus, -v 



Montf. # 



268. Pomatia, y Helicogena. 



269. Streptaxis contusa, Gray. V 



270. Another view of the same. -' 



271. Anastoma depressum. 



272. Another view of the same. 



273. Helix nux-denticulata. 



> nelicodonta. 



274. Proserpina nitida. 



275. Polygyra septemvolva., 



276. Another view of the same. 



277. Carocolla Lamarckii. i 



278. Helix pil eus. 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. 



