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

These fossil stems are from the same sandstone quarry as the Calamite delineated in the previous plate.

They differ in some respects from the usual type of the genus, hence the specific name (Calamites dubius). The striæ are narrow, and have a fine groove running down the middle; the fifth or sixth articulation is surrounded by a double line of large globular indentations, one row belonging to each of the connected joints; these imprints have apparently been left by a zone of some organs which surrounded the articulations, and by its pressure left the indented frill, shown in the upper extremity of fig. 2.

These stems are generally found compressed, and from two to three feet in length. Their termination is unknown.

This species is figured by M. Ad. Brongniart in Hist. Veg. Foss. tab. 18, figs. 1-3.

Plate XV.

PLATE XV.