Introduction to the Study of Palæontological Botany

by John Hutton Balfour

[EXPLANATION OF PLATES.]

PLATE I.

Fig. 1. Palæopteris Hibernica, Schimper (Cyclopteris Hibernica, Forbes). One-sixth the natural size.

Fig. 2. A pinnule somewhat magnified, showing the venation.

Fig. 3. A fertile pinna, natural size.

Fig. 4. Two cup-shaped indusia borne on the rachis.

Fig. 5. Sporangia enclosing spores. From the Coal-measures.

Fig. 6. Sporangia of Hymenophyllum Tunbridgense, Sm. (Fern of present epoch.)

Fig. 7. Sporangium of Polypodium vulgare, Linn. (Fern of present epoch.) Figs. 5, 6, and 7, magnified to the same extent.

Fig. 8. Transverse section of Osmundites Dowkeri, Carruthers.