164. ---- margaritifera. Meleagrina, Lam. 165. Malleus Vulgaris. Himantopoda, Schum. 166. Perna Ephippium. 167. Catillus Lamarckii. Inoceramus, Sow. (from Blainville.) 168. Crenatula mytoloides. } } 169. Gervillia aviculoides. } (from Sowerby's Genera.) } 170. Pulvinites Adansonii. } _Fam._ Pectinides. 171. Pecten varius. Janera, Schum. 172. ---- Plica. Decadopecten, Rüppell. 173. Hinnites Pusio. Pecten Pusio, Lam. 174. Lima squamosa. 175. Dianchora striata, (from Sow. Min. Con.) 176. Plagiostoma spinosum, (from Sow. Min. Con.) 177. Spondylus Americanus, hinge. (See Frontispiece.) 178. Plicatula gibbosa. Harpax, Parkinson. 179. Pedum Spondyloideum, (from Sow. Gen.) _Fam._ Ostracea. 180. Ostrea edulis. 181. ---- Folium. Dendostrea, Sw. 182. Gryphæa incurva. 183. Exogyra conica, (from Sow. Min. Con.) 184. Placuna placenta. _Gen._ Placenta, Schum. 185. Vulsella lingulata. 186. Anomia Ephippium. 187. Hinge of the same, with bony process. 188. Hinge, showing the fissure. 189. Placunanomia Cumingii. 190. Hinge of the same, showing the fissure. 191. Hinge of the unattached valve. 192. Mulleria. (from Sow. Gen.) _Fam._ Rudistis. 193. Sphærulites foliacea. (Radiolites is more conical.) 194. Calceola Sandalina. 196. Birostrites inæquiloba, internal cast of Sphærulites. 197. _a._ Crania personata, dorsal valve; _b._ C. antiquata, interior. (This would be more properly placed in Brachiopoda.) 198. Hippurites Cornucopia, (from Blainville.) 199. Hipponyx Cornucopia, attached valve. 200. Upper valve of the same. _Fam._ Brachiopoda. 201. Orbicula lævis. 202. Terebratula Psittacea; _a._ anterior margin. 203. Atrypa reticularis. Trigonotreta, König. 204. Cyrtia exporrecta. 205. Delthyris plycotes, (from Dalman.) 206. Leptæna depressa, Dalman. Producta, Sow. (from Sow. Gen.) 206*. Producta antiquata. 207. Orthis basalis, Dalman. Strophomena, Rafinesque. 208. Trigonosemus Lyra, König. 209. Magas pumilus, Sow. 210. Gypidia conchidium, (from Dalman.) 211. Interior of the large valve of the same. (from Dalman.) 212. Pentamerus Aylesfordii, (from Sow. Min. Con.) 213. ---- lævis. 214. Spirifer trigonalis. } } Trigonotreta, König, (from Sow. Gen.) 215. ---- dorsatus. } 216. Thecidium recurvirostrum. (Here should come Crania, see Rudistes.) 217. Pycnodonta radiata, (from Fischer.) 218. Hinge of the same. 219. Lingula Anatina. _Class_, MOLLUSCA. _Order_, PTEROPODA. 220. Atlanta helicialis. 221. Cleodora cuspidata. 222. Creseis spinifera. 223. Cuvieria columella.