Fig. 8.
The Pecten quinquccostatus of Forbes, the Janira Atava of D’Orbigny ([Fig. 7]), is a beautiful semicircular shell, with a regularly denticulated edge, its surface being covered with fine transverse striæ. The woodcuts of the Pecten or Janira striatacostata and the Pecten Dujardinii ( [Fig. 8] and [9]), serve to exhibit other varieties of these fossils, and at the same time to show the elegant curvatures of these shells, when viewed in different positions.
Fig. 9.
