Page:Geology and Mineralogy considered with reference to Natural Theology, 1837, volume 2.djvu/259

Pl. 42. 1. Nautilus Hexagonus. 2. Ammonites Excavatus. 3. Ammonites Catena. 4.5.6. Ammonites Varicosus. 5.6. Fragments of Fig. 4. 7. Ammonites Variocostatus.