A Pictorial Atlas of Fossil Remains, consisting of coloured illustrations selected from Parkinson's "Organic remains of a former world," and Artis's "Antediluvian phytology."

by Gideon Algernon Mantell

Plate XVII.

PLATE XVII.

"Ornamented Calamite."

(Calamites decoratus, Artis.
—— ——, of Brongniart, Hist. Veg. Foss. tab. 14, figs. 1-5.)

In this species of Calamite the joints are short, and decrease in length towards the summit, where they terminate in an enlarged rounded head. The striæ are ornamented with tubercles at the bottom, close to the articulation. The striæ are broader, and the tubercles larger, towards the summit.

The stem is sometimes found two feet long, and from two to four inches in diameter.

The situation of the tubercles at the lower extremity of the striæ, is a striking feature of this species; and the termination of the summit of the stem is remarkable for its obtuseness.

The specimen is from Leabrook Quarry, Yorkshire.