Part 86

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.