| Figs. | 1, 2, 3.— | Twigs of Larch and Hawthorn, coated with tufa, or travertine, from having been exposed to the dripping of an incrusting spring; from Russia; see [p. 39]. |
| 5.— | A branch of recent Chara, with its fruit, with a thin pellicle of incrustation. Matlock. | |
| 6, 7.— | Hazel-nuts, from Belfast Lough: fig. 6 is lined with crystals of calcareous spar; fig. 7 is filled with a solid mass of the same mineral; see [p. 71]. | |
| 4, 8.— | Impressions of Dicotyledonous Leaves in Gypseous Marlstone, from Stradella, near Pavia; see [p. 201]. | |
| 9.— | Eocene Lacustrine or Fresh-water Limestone, from East Cliff Bay, Isle of Wight, with stems and seeds of Charge: slightly magnified; see [p. 195]. | |
| 10.— | Encrusted Twigs, from Matlock; the vegetable matter has perished, and left tubular cavities; see [p. 39], and [p. 873]. |
J. Dinkel del. G. Scharf lithog.
Printed by Hullmandel & Walton
DESCRIPTION OF PLATE IV.
Various species of recent Diatomaceæ, to illustrate the Fossil remains of this Tribe of Vegetables.