Page:Transactions of the Geological Society, 1st series, vol. 2.djvu/190

180 {| width="90%" align="center"
 * colspan="3" | Scaphites: a new genus by Mr. Parkinson. See his Organic Remains, vol. 3.
 * colspan="3" | Turrellites, three species.
 * colspan="3" | Trochus.
 * colspan="3" | Madreporæ.
 * }
 * colspan="3" | Trochus.
 * colspan="3" | Madreporæ.
 * }
 * }

It has been remarked by the French naturalists that in their chalk there is not any univalve shell with a simple and regular spire. In the chalk of this country, univalves, as the trochus, do sometimes occur. They may probably however be rather the fossils of the green sand below the chalk, which have been enveloped in some of the depositions of the chalk formation, or in the chalk marl, for they are frequently accompanied by green earth.