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

a. Glossopteris.—Frond simple, not jagged, traversed by a single mid-rib, without distinct secondary ribs.

b. Sphenopteris.—Pinnules wedge-shaped, rounded or lobed at the extremity; ribs palmate or radiating from the base of the pinnule.

c. Neuropteris.—Pinnules rounded, not lobed, nor adhering to the rachis by their base; ribs scarcely visible beyond the base, in general very distinct, and two-forked.

d. Pecopteris.—Frond pinnatifid; pinnules adherent by their base to the rachis,> traversed by a mid-rib; secondary ribs pinnate.

e. Odontopteris.—Pinnules adhering to the rachis by the whole of their base; mid-rib none; secondary ribs running out perpendicularly from the rachis.

12. Sphœnophyllites.—Leaves verticillate, wedge-shaped, truncate; ribs radiating, two-forked.[100]

13. Asterophyllites.—Leaves verticillate, with a single rib.[101]

14. Fucoides.—Frond not symmetrical, often disposed on a flat surface; ribs none, or badly defined.

15. Phyllites.—Leaves with ribs well defined, repeatedly divided, or anastomosing.[102]