Fig. 31.

STIGMARIA FICOIDES.
(One fourth nat. size.)

Fig. 32.

FAVULARIA TESSELLATA.
(One fifth nat. size.)

Fig. 33.

LEPIDODENDRON OBOVATUM.
(Nat. size.)

Fig. 34.CYCAS REVOLUTA.

Fig.35.ZAMIA PUNGENS.

(Recent.)

Fig. 36.ZAMIA FENEONIS (Portland Oolite.)